AS5030
8-Bit Programmable High Speed Magnetic Rotary Encoder
www.ams.com/AS5030 Revision 2.4 1 - 44
1 General Description
The AS5030 is a contactless magnetic rotary encoder for accurate
angular measurement over a full turn of 360°.
It is a system-on-chip, combining integrated Hall elements, analog
front end and digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating over
the center of the chip is required.
The absolute angle measurement provides instant indication of the
magnet’s angular position with a resolution of 8 bit = 256 positions
per revolution. This digital data is available as a serial bit stream and
as a PWM signal.
In addition to the angle information, the strength of the magnetic field
is also available as a 6-bit code.
Data transmission can be configured for 1-wire (PWM), 2-wires
(CLK, DIO) or 3-wires (CLK, DIO, CS).
A software programmable (OTP) zero position simplifies assembly
as the zero position of the magnet does not need to be mechanically
aligned.
A Power Down Mode together with fast startup- and measurement
cycles allows for very low average power consumption and makes
the AS5030 also suitable for battery operated equipment.
Figure 1. AS5030 Block Diagram
2 Key Features
360° contactless angular position encoding
Two digital 8-bit absolute outputs:
- Serial interface
- Pulse width modulated (PWM) output
User programmable zero position
Direct measurement of magnetic field strength allows exact
determination of vertical magnet distance
Serial read-out of multiple interconnected AS5030 devices
using daisy chain mode
Wide magnetic field input range: 20 ~ 80mT
Wide temperature range: -40°C to +125°C
Small Pb-free package: TSSOP 16
3 Applications
The AS5030 is suitable for Contactless rotary position sensing,
Rotary switches (human machine interface), AC/DC motor position
control, Robotics and Encoder for battery operated equipment.
Tracking
ADC &
Angle
Decoder
Hall Array
&
Front-end
Amplifier
Power Management OTP
Absolute
Serial
Interface
(SSI)
DIO
PWM
CLK
PROG
CS
PWM
Decoder
Cos
Sin
AGC
DX
C2
Mag
Zero
Position
AGC
Angle
MagRngn
Sin / Sinn / Cos / Cosn
AS5030
www.ams.com/AS5030 Revision 2.4 2 - 44
AS5030
Datasheet - Contents
Contents
1 General Description .................................................................................................................................................................. 1
2 Key Features............................................................................................................................................................................. 1
3 Applications............................................................................................................................................................................... 1
4 Pin Assignments ....................................................................................................................................................................... 4
4.1 Pin Descriptions.................................................................................................................................................................................... 4
5 Absolute Maximum Ratings ...................................................................................................................................................... 5
6 Electrical Characteristics........................................................................................................................................................... 6
6.1 Operating Conditions............................................................................................................................................................................ 6
6.2 System Parameters.............................................................................................................................................................................. 6
6.3 Magnet Specifications .......................................................................................................................................................................... 7
6.4 Magnetic Field Alarm Limits ................................................................................................................................................................. 7
6.5 Hall Element Sensitivity Options........................................................................................................................................................... 7
6.6 Programming Parameters .................................................................................................................................................................... 8
6.7 DC Characteristics of Digital Inputs and Outputs ................................................................................................................................. 8
6.8 8-bit PWM Output ................................................................................................................................................................................. 9
6.9 Serial 8-bit Output................................................................................................................................................................................. 9
6.10 General Data Transmission Timings ................................................................................................................................................ 10
7 Detailed Description................................................................................................................................................................ 11
7.1 Connecting the AS5030...................................................................................................................................................................... 11
7.2 Serial 3-Wire R/W Connection............................................................................................................................................................ 11
7.3 Serial 3-Wire Read-only Connection .................................................................................................................................................. 13
7.4 Serial 2-Wire Connection (R/W Mode) ............................................................................................................................................... 14
7.5 Serial 2-Wire Continuous Readout ..................................................................................................................................................... 15
7.6 Serial 2-Wire Differential SSI Connection........................................................................................................................................... 15
7.7 1-Wire PWM Connection ................................................................................................................................................................ 16
7.8 Analog Output..................................................................................................................................................................................... 18
7.9 Analog Sin/Cos Outputs with External Interpolator ............................................................................................................................ 19
7.10 3-Wire Daisy Chain Mode................................................................................................................................................................. 20
7.11 2-Wire Daisy Chain Mode................................................................................................................................................................. 21
8 Application Information ........................................................................................................................................................... 22
8.1 AS5030 Programming ........................................................................................................................................................................ 23
8.1.1 OTP Programming Options ....................................................................................................................................................... 23
8.1.2 Reduced Power Mode Programming Options ........................................................................................................................... 23
8.2 AS5030 Read / Write Commands ...................................................................................................................................................... 23
8.2.1 16-bit Read Command............................................................................................................................................................... 23
8.2.2 16-bit Write Command............................................................................................................................................................... 24
8.2.3 18-bit OTP Read Commands ................................................................................................................................................... 24
8.2.4 18-bit OTP Write Commands .................................................................................................................................................... 25
8.3 OTP Programming Connection .......................................................................................................................................................... 26
8.3.1 Programming in Daisy Chain Mode ........................................................................................................................................... 26
8.4 Programming Verification ................................................................................................................................................................... 27
www.ams.com/AS5030 Revision 2.4 3 - 44
AS5030
Datasheet - Contents
8.5 AS5030 Status Indicators................................................................................................................................................................... 27
8.5.1 C2 Status Bit.............................................................................................................................................................................. 27
8.5.2 Lock Status Bit........................................................................................................................................................................... 27
8.5.3 Magnetic Field Strength Indicators ............................................................................................................................................ 28
8.5.4 “Push-button” Feature................................................................................................................................................................ 28
8.6 High Speed Operation ........................................................................................................................................................................ 29
8.6.1 Propagation Delay ..................................................................................................................................................................... 29
8.6.2 Total Propagation Delay of the AS5030 ................................................................................................................................... 30
8.7 Reduced Power Modes ...................................................................................................................................................................... 30
8.7.1 Low Power Mode and Ultra-low Power Mode............................................................................................................................ 31
8.7.2 Power Cycling Mode.................................................................................................................................................................. 33
8.8 Accuracy of the Encoder System ....................................................................................................................................................... 34
8.8.1 Quantization Error...................................................................................................................................................................... 34
8.8.2 Vertical Distance of the Magnet................................................................................................................................................. 35
8.9 Choosing the Proper Magnet.............................................................................................................................................................. 36
8.9.1 Magnet Placement..................................................................................................................................................................... 37
8.9.2 Lateral Displacement of the Magnet .......................................................................................................................................... 38
8.9.3 Magnet Size............................................................................................................................................................................... 39
8.10 Physical Placement of the Magnet ................................................................................................................................................... 40
9 Package Drawings and Markings ........................................................................................................................................... 41
9.1 Recommended PCB Footprint............................................................................................................................................................ 42
10 Ordering Information............................................................................................................................................................. 43
www.ams.com/AS5030 Revision 2.4 4 - 44
AS5030
Datasheet - Pin Assignments
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
4.1 Pin Descriptions
Table 1. Pin Descriptions
Pin Number Pin Name Pin Type Description
1MagRngn Digital output / tri-state Push-Pull output. Is ‘HIGH’ when the magnetic field strength is too
weak, e.g. due to missing magnet
2PROG Supply pin
Programming voltage input. Must be left open in normal operation.
Maximum load = 20pF (except during programming)
3VSS Supply ground
4 T3_SINn - This pin is used for factory testing. For normal operation it must be left
unconnected. Inverse SIN (Sinn) output in SIN/COS output mode
5T2_SIN -This pin is used for factory testing. For normal operation it must be left
unconnected. SIN output in SIN/COS mode
6T1_COSn -This pin is used for factory testing. For normal operation it must be left
unconnected. Inverse COS (Cosn) output in SIN/COS mode
7T0_COS -This pin is used for factory testing. For normal operation it must be left
unconnected. COS output in SIN/COS mode
8TC -Test pin. Connect to VSS or leave unconnected
9DX Digital output Digital output for 2-wire operation and Daisy Chain mode
10 CLK Digital input /
Schmitt-Trigger
Clock Input of Synchronous Serial Interface; Schmitt-Trigger input
11 CS Chip Select for serial data transmission, active high; Schmitt-Trigger
input, external pull-down resistor (~50kΩ) required in read-only mode
12 DIO Bi-directional digital pin Data output / command input for digital serial interface
13 VDD Supply pin Positive supply voltage, 4.5V to 5.5V
14 C1
Digital input
(standard CMOS; no
pull-up or pull-down)
Configuration input: Connect to VSS for normal operation,
connect to VDD to enable SIN-COS outputs. This pin is scanned at
power-on-reset and at wake-up from one of the Ultra-low Power Modes
15 C2
Configuration input: Connect to VSS for 3-wire operation,
connect to VDD for 2-wire operation. This pin is scanned at power-on-
reset and at wake-up from one of the Ultra-low Power Modes
16 PWM Digital output Pulse Width Modulation output, 2µs pulse width per step
(2µs ~ 512µs)
2
3
4
5
6
7
89
10
11
12
13
14
15
161
PROG
VSS
test3
test2
test1
test0
TC
MagRngn
DX
CLK
CS
DIO
VDD
C1
C2
PWM
AS5030
www.ams.com/AS5030 Revision 2.4 5 - 44
AS5030
Datasheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of
the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 6 is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Symbol Parameter Min Max Units Comments
Electrical Parameters
VDD Supply voltage -0.3 7 V Except during OTP programming
VIN Input pin voltage VSS - 0.5 VDD + 0.5 V
Iscr Input current (latch-up immunity) -100 100 mA Norm: Jedec 78
Electrostatic Discharge
ESD Electrostatic Discharge ±2 kV Norm: MIL 883 E method 3015
ΘJA Package thermal resistance 137 °C/W Still Air / Single Layer PCB
89 °C/W Still Air / Multilayer PCB
Temperature Ranges and Storage Conditions
Tstrg Storage temperature -55 +150 °C Min -67ºF; Max +257ºF
TBODY Body temperature 260 °C
The reflow peak soldering temperature
(body temperature) specified is in
accordance with IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity Classification
for Non-Hermetic Solid State Surface
Mount Devices”.
The lead finish for Pb-free leaded packages
is matte tin (100% Sn).
Humidity non-condensing 5 85 %
MSL Moisture Sensitive Level 3 Represents a maximum floor time of 168h
www.ams.com/AS5030 Revision 2.4 6 - 44
AS5030
Datasheet - Electrical Characteristics
6 Electrical Characteristics
TAMB = -40°C to +125°C, VDD5V = 4.5V ~ 5.5V, all voltages referenced to VSS, unless otherwise noted.
6.1 Operating Conditions
6.2 System Parameters
Symbol Parameter Conditions Min Typ Max Units
VDD Positive supply voltage 4.5 5.5 V
IDD Operating current
No load on outputs.
Minimum AGC (strong magnetic field) 14 18
mA
No load on outputs.
Maximum AGC (weak or no magnetic field) 18 22
Ioff Power-down current Low Power Mode 1400 2000 µA
Ultra-low Power Mode 30 120
TAMB Ambient temperature -40°F ~ +257°F -40 125 °C
Symbol Parameter Conditions Min Typ Max Units
N Resolution 8bit
1.406 °
TPwrUp Power up time
Startup from zero; AGC not regulated 1000
μs
Startup from zero until regulated AGC 3300
Startup from Power Down Mode 500
Startup from Low Power Mode
Setting 1: no hysteresis, no reset 46
Setting 2: hysteresis and reset 1500
tda Propagation delay Analog signal path;
over full temperature range 15 17 µs
tdd Tracking rate step rate of tracking ADC;
1 step = 1.406° 0.85 1.15 1.45 µs
tdelay Signal processing delay Total signal processing delay,
analog + digital (tda + tdd)16.15 18.45 µs
T Analog filter time constant Internal low-pass filter 4.1 6.6 12.5 µs
INLcm Accuracy
centered magnet -2 2
°
within horizontal displacement radius
(see Magnet Specifications on page 7) -3 3
TN Transition noise rms (1 sigma) 0.235 °
PORr
Power-on-reset levels
VDD rising 3.5 4.5 V
PORfVDD falling 3.0 4.5 V
Hyst Hysteresis | PORr - PORf |500 mV
www.ams.com/AS5030 Revision 2.4 7 - 44
AS5030
Datasheet - Electrical Characteristics
6.3 Magnet Specifications
Recommended magnet: NdFeB 35H BR = 12.000 Gauss, Ø6mm x 2.5mm
6.4 Magnetic Field Alarm Limits
6.5 Hall Element Sensitivity Options
Symbol Parameter Conditions Min Typ Max Units
MD Magnet diameter Diametrically magnetized 6 mm
MT Magnet thickness 2.5 mm
BiMagnetic input range At chip surface, on a radius of 1mm 20 80 mT
viMagnet rotation speed To maintain locked state 30.000 rpm
Bmax Magnetic field high detection TAMB=25°C, AGC @ lower limit,
1 sigma = 2.5mT 52
mT
Bmin Magnetic field low detection TAMB=25°C, AGC @ upper limit,
1 sigma = 1.5mT 23
Hall array radius Over x/y chip center 1 mm
Vertical distance of magnet
Recommended distance; operation outside
this range is possible, accuracy may be
reduced
0.5 1 1.8 mm
Horizontal magnet displacement radius From diagonal package center 0.25 mm
From diagonal IC center 0.5
tkMRecommended magnet material and
temperature drift
NdFeB Material -0.12 %/K
SmCo Material -0.035
Symbol Parameter Conditions Min Typ Max Units
AGCFF Magnetic field too low alarm limit AGC = FFH
untrimmed, 25°C, 1sigma 20.3 23.6 mT
AGC0Magnetic field too high alarm limit AGC = 0H
untrimmed, 25°C, 1sigma 44.5 52.2 mT
Magnetic field alarm limit trim range (see Hall Element Sensitivity Options on
page 7) 100 121 %
Temperature coefficient of alarm ranges
Sensitivity increases with temperature which
partly compensates the temperature
coefficient of the magnet
0.052 %/K
Symbol Parameter Conditions Min Typ Max Units
sens Hall element sensitivity setting
sens = 00 (default); low sensitivity
(see 18-bit OTP Write Commands on page
25)
100
%
sens = 01 106
sens = 10 113
sens = 11 (high sensitivity) 121
www.ams.com/AS5030 Revision 2.4 8 - 44
AS5030
Datasheet - Electrical Characteristics
6.6 Programming Parameters
6.7 DC Characteristics of Digital Inputs and Outputs
CMOS Inputs: CLK, CS, DIO, C1, C2
CMOS Outputs: DIO, MagRngn, PWM, DX
CMOS Tristate Output: DIO
Symbol Parameter Conditions Min Typ Max Units
VPROG Programming voltage Static voltage at pin PROG 8.0 8.5 V
IPROG Programming current 100 mA
TambPROG Programming ambient temperature During programming 0 85 °C
tPROG Programming time Timing is internally generated 2 4 µs
VR,prog Analog readback voltage During Analog Readback mode at pin PROG 0.5 V
VR,unprog 2.2 3.5
Symbol Parameter Conditions Min Typ Max Units
VIH High level input voltage 0.7*VDD V
VIL Low level input voltage 0.3*VDD V
ILEAK Input leakage current 1 µA
Symbol Parameter Conditions Min Typ Max Units
VOH High level output voltage Source current <4mA VDD-0.5 V
VOH Low level output voltage Sink current <4mA 0.4 V
CLCapacitive load 35 pF
Symbol Parameter Conditions Min Typ Max Units
IOZTristate leakage current CS = low 1 µA
www.ams.com/AS5030 Revision 2.4 9 - 44
AS5030
Datasheet - Electrical Characteristics
6.8 8-bit PWM Output
6.9 Serial 8-bit Output
3-wire Interface.
2-wire Interface.
Symbol Parameter Conditions Min Typ Max Units
NPWM PWM resolution 8bit
2 µs/step
PWMIN PWM pulse width Angle = 0° (00H)1.66 2.26 2.85 µs
PWMAX PWM pulse width Angle = 358.6° (FFH)427 578 731 µs
PWPPWM period Over full temperature range1
1. The tolerance of the absolute PWM pulse width and frequency can be eliminated by using the duty cycle tON/(tON+tOFF) for angle
measurement(see 1-Wire PWM Connection on page 16).
428 581 734 µs
fPWM PWM frequency 1 / PWM period 1.72 kHz
Hyst Digital hysteresis2
2. Hysteresis may be temporarily disabled by software(see 16-bit Write Command on page 24).
At change of rotation direction 1 bit
Symbol Parameter Conditions Min Typ Max Units
fCLK Clock frequency Normal operation 6MHz
tCLK 166.6 ns
fclk,P Clock frequency During OTP programming 250 500 kHz
Symbol Parameter Conditions Min Typ Max Units
fCLK Clock frequency Normal operation 0.1 6 MHz
tCLK 166.6 10,000 ns
fclk,P Clock frequency During OTP programming 250 500 kHz
tTO Synchronization timeout Rising edge of CLK to internally generated
chip select on pin DX 16.6 27 34.3 ms
Hyst Digital hysteresis1
1. Hysteresis may be temporarily disabled by software.
At change of rotation direction 1 bit
www.ams.com/AS5030 Revision 2.4 10 - 44
AS5030
Datasheet - Electrical Characteristics
6.10 General Data Transmission Timings
See Figure 5 for the corresponding timing diagram.
Symbol Parameter Conditions Min Typ Max Units
t0 Rising CLK to CS CLK/2
+0
CLK/2
+50 ns
t1 Chip select to positive edge of CLK 50 ns
t2 Chip select to drive bus externally 0 ns
t3 Setup time command bit data valid to
positive edge of CLK 50 ns
t4 Hold time command bit data valid after
positive edge of CLK 15 ns
t5 Float time positive edge of CLK for last
command bit to bus float CLK/2 +0 ns
t6 Bus driving time positive edge of CLK for
last command bit to bus drive
CLK/2
+0 ns
t7 Setup time data bit data valid to positive
edge of CLK
CLK/2
+0
CLK/2
+30 ns
t8 Hold time data bit data valid after positive
edge of CLK
CLK/2
+0 ns
t9 Hold time chip select positive edge CLK to
negative edge of chip select
CLK/2
+50 ns
t10 Bus floating time negative edge of chip
select to float bus 50 ns
t11 Hold time data bit @ write access
data valid to positive edge of CLK 50 ns
t12 Hold time data bit @ write access
data valid after positive edge of CLK 15 ns
t13 Bus floating time negative edge of chip
select to float bus 50 ns
tTO Timeout period in 2-wire mode
(from rising edge of CLK) 20 24 µs
www.ams.com/AS5030 Revision 2.4 11 - 44
AS5030
Datasheet - Detailed Description
7 Detailed Description
The benefits of AS5030 are as follows:
Complete system-on-chip, no calibration required
Flexible system solution provides absolute serial and PWM output
Ideal for applications in harsh environments due to magnetic sensing principle
High reliability due to non-contact sensing
Robust system, tolerant to horizontal misalignment, airgap variations, temperature variations and external magnetic fields
Figure 3. Typical Arrangement of AS5030 and Magnet
7.1 Connecting the AS5030
The following examples show various ways to connect the AS5030 to an external controller:
7.2 Serial 3-Wire R/W Connection
In this mode, the AS5030 is connected to the external controller via three signals:
Chip Select (CS), Clock (CLK) inputs and bi-directional DIO (Data In/Out) output.
The controller sends commands over the DIO pin at the beginning of each data transmission sequence, such as reading the angle or putting the
AS5030 in and out of the reduced power modes.
A pull-down resistor is not required.
C1 and C2 are hardware configuration inputs. C1 must always be connected to VSS, C2 selects 3-wire mode (C2 = low) or 2-wire mode (C2 =
high)
www.ams.com/AS5030 Revision 2.4 12 - 44
AS5030
Datasheet - Detailed Description
Figure 4. SSI Read/Write Serial Data Transmission
Figure 5. Timing Diagram in 3-wire SSI R/W Mode
Table 3. Serial Bit Sequence (16-bit read/write)
Write Command Read / Write Data
C4 C3 C2 C1 C0 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
AS5030
Micro
Controller 100 n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
Output
CMD 3 CMD0
CLK
CS
DIO
D15
t5
t3 t4 t6
t9
command phase data phase
D14 D0
t10
DIO DIO write
t1
DIO read
123 4567 21
20
CMD4
D1
t7 t8
tCLK
www.ams.com/AS5030 Revision 2.4 13 - 44
AS5030
Datasheet - Detailed Description
7.3 Serial 3-Wire Read-only Connection
If the AS5030 is only used to provide the angular data (no power down or OTP access) this simplified connection is possible. The Chip Select
(CS) and Clock (CLK) connection is the same as in the R/W mode, but only a digital input pin (not an I/O pin) is required for the DIO connection.
As the first 5 bits of the data transmission are command bits sent to the AS5030, both the microcontroller and the AS5030 are configured as
digital inputs during this phase. Therefore, a pull-down resistor must be added to make sure that the AS5030 reads “00000” as the first 5 bits
which sets the Read_Angle command.
All further application examples are shown in R/W mode, however read-only mode is also possible, unless otherwise noted.
Figure 6. SSI Read-only Serial Data Transmission
Figure 7. Timing Diagram in 2-wire and 3-wire SSI Mode
Table 4. Serial Bit Sequence (16-bit read/write)
Read
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 C2 lock AGC Angle
D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
Input
10 k ...
100 k
Output
Output
Micro
Controller AS5030
CLK
CS
DIO
D15
t9
command phase data phase
t10
DIO DIO write
t1
DIO read
123 4567 21
8
D12
20
D14 D13 D0D1
www.ams.com/AS5030 Revision 2.4 14 - 44
AS5030
Datasheet - Detailed Description
7.4 Serial 2-Wire Connection (R/W Mode)
By connecting the configuration input C2 to VDD, the AS5030 is configured to 2-wire data transmission mode.
Only Clock (CLK) and Data (DIO) signals are required. A Chip Select (CS) signal is automatically generated by the DX output, when a time-out
of CLK occurs (typ. 20µs).
Note: Read-only mode is also possible in this configuration.
Figure 8. SSI R/W Mode 2-wire Data Transmission
Figure 9. Timing Diagram in 2-wire SSI Mode
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS
C2 VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
DX
9
AS5030
Micro
Controller
CMD4
CLK
CS
DIO read
t0
t6
command phase data phase
DIO write
t1
123 4567 22
DX
8
wait cycle
(> 500 ns)
CMD2CMD3 CMD1 CMD0
D15 D14 D0
t5
www.ams.com/AS5030 Revision 2.4 15 - 44
AS5030
Datasheet - Detailed Description
7.5 Serial 2-Wire Continuous Readout
The termination of each readout sequence by a timeout of CLK after the 22nd clock pulse as described in Serial 2-Wire Connection (R/W Mode)
is the safest method to ensure synchronization, as each timeout of CLK resets the serial interface.
However, it is not mandatory to apply a timeout of CLK and consequently synchronization after each reading. It is also possible to read several
consecutive angle values without synchronization by simply continuing the CLK pulses without timeout after the 22nd clock. The 23rd clock is
equal to the 1st clock of the next measurement, etc.
This is the fastest way to read multiple angle values, as there is no timeout period between the readings. It is still possible to synchronize the
serial data transmission by a timeout of CLK after a given number of readouts (e.g. synchronize after every 5th reading, etc.)
Figure 10. Timing Diagram in 2-wire SSI Continuous Readout
7.6 Serial 2-Wire Differential SSI Connection
With the addition of a RS-422 / RS-485 transceiver, a fully differential data transmission, according to the 21-bit SSI interface standard is
possible. To be compatible with this standard, the CLK signal must be inverted. This is done by reversing the Data+ and Data- lines of the
transceivers.
Note: This type of transmission is read-only.
Figure 11. 2-wire SSI Read-only Mode
CMD4
CLK
CS
DIO read
t0
t6
command phase data phase
DIO write
t1
123 4567 22
DX
8
CMD2CMD3 CMD 1 CMD0
D15 D14 D0
t5
23 24 25
CMD4 CMD2CMD3
1st reading 2nd reading
command phase
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS
C2 VDD
VDD
13
11
10
12
15
C1 VSS
314
Input
Output
DX
9
CLK
DI
D+
D- D+
D-
MAX 3081 or similar
D+
D-
D-
D+
Micro
Controller AS5030
www.ams.com/AS5030 Revision 2.4 16 - 44
AS5030
Datasheet - Detailed Description
Figure 12. Timing Diagram in 2-wire Read only Mode (differential transmission)
7.7 1-Wire PWM Connection
This configuration uses the least number of wires: only one line (PWM) is used for data, leaving the total number of connection to three, including
the supply lines. This type of configuration is especially useful for remote sensors.
Ultra-low Power Mode is not possible in this configuration, as there is no bi-directional data transmission.
If the AS5030 angular data is invalid, the PWM output will remain at low state. Pins that are not shown may be left open.
Note that the PWM output is invalid when the AGC is disabled.
Figure 13. Data Transmission with Pulse Width Modulated (PWM) Output
Table 5. SSI Read-only Serial Bit Sequence (21bit read)
Read
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 C2 lock AGC Angle
D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
123 45678
D14 D1
2120
DI
CLK
D15 D0
tTO
timeout
100n
CS
PWM
+5 V
VDD
VSS
VSS C 2
VDDVDD
1311
16
15
C1 VSS
314
Input
Micro
Controller
AS5030
www.ams.com/AS5030 Revision 2.4 17 - 44
AS5030
Datasheet - Detailed Description
The minimum PWM pulse width tON (PWM = high) is 1 LSB @ 0° (Angle reading = 00H).
1LSB = nom. 2.26µs.
The PWM pulse width increases with 1LSB per step. At the maximum angle 358.6° (Angle reading = FFH),
the pulse width tON (PWM = high) is 256 LSB and the pause width tOFF (PWM = low) is 1 LSB.
This leads to a total period (tON + tOFF) of 257LSB.
This means that the PWM pulse width is (position + 1) LSB, where position is 0….255.
The tolerance of the absolute pulse width and -frequency can be eliminated by calculating the angle with the duty cycle rather than with the
absolute pulse width:
(EQ 1)
results in an 8-bit value from 00H to FFH,
(EQ 2)
results in a degree value from 0° ~ 358.6°
Note: The absolute frequency tolerance is eliminated by dividing tON by (tON+TOFF), as the change of the absolute timing effects both TON
and TOFF in the same way.
Table 6. SSI Read-only Serial Bit Sequence (21-bit read)
Position Angle High t_high Low t_low Duty-Cycle
0 0° 1 2.26µs 256 578.56µs 0.39%
127 178.59 128 287.02µs 129 291.54µs 49.4%
128 180° 129 291.54µs 128 287.02µs 50.2%
255 358.59° 256 578.56µs 1 2.26µs 99.6%
0128 255
Position
2. 26 µs 291. 54 µs 578. 56 µs
2. 26µs
287. 02 µs
578. 56 µs
ton
toff
0V
5V
PWM out
[]
12578 −
+
=−
OFFON
ON
tt t
bitangle
[]
−
+
=° 1257
256
360
OFFON
ON
tt t
angle
www.ams.com/AS5030 Revision 2.4 18 - 44
AS5030
Datasheet - Detailed Description
7.8 Analog Output
This configuration is similar to the PWM connection (only three lines including supply are required). With the addition of a low-pass filter at the
PWM output, this configuration produces an analog voltage that is proportional to the angle.
This filter can be either passive (as shown) or active. The lower the bandwidth of the filter, the less ripple of the analog output can be achieved.
If the AS5030 angular data is invalid, the PWM output will remain at low state and thus the analog output will be 0V. Pins that are not shown may
be left open.
Note: The PWM output is invalid when the AGC is disabled.
Figure 14. Data Transmission with Pulse Width Modulated (PWM) Output
Figure 15. Relation of PWM/Analog Output With Angle
100n
CS
PWM
+5 V
VDD
VSS
C2
VDD
1311
16
15
C1 VSS
314
>=4k7>=4k7
>=1µF >=1µF
Analog
out
AS5030
0° 180° 360°
Angle
0V
5V
PWMout
Analog out
www.ams.com/AS5030 Revision 2.4 19 - 44
AS5030
Datasheet - Detailed Description
7.9 Analog Sin/Cos Outputs with External Interpolator
By connecting C1 to VDD, the AS5030 provides analog Sine and Cosine outputs (Sin, Cos) of the Hall array front-end for test purposes. These
outputs allow the user to perform the angle calculation by an external ADC + µC, e.g. to compute the angle with a high resolution.
In addition, the inverted Sine and Cosine signals (Sinn, Cosn; see dotted lines) are available for differential signal transmission.
The input resistance of the receiving amplifier or ADC should be greater than 100kΩ. The signal lines should be kept as short as possible, longer
lines should be shielded in order to achieve best noise performance.
The SIN / COS / SINn / COSn signals are amplitude controlled to ~1.3Vp (differential) by the internal AGC controller. The DC bias voltage is
2.25V.
If the SIN(n)- and COS(n)- outputs cannot be sampled simultaneously, it is recommended to disable the automatic gain control as the signal
amplitudes may be changing between two readings of the external ADC. This may lead to less accurate results.
Figure 16. Sine and Cosine Outputs for External Angle Calculation
100n
Sin
Cos
+5 V
VDD
VSS
VSS VSS
VDD
VDD
DA
D A
Sinn
Cosn
C1
C2
14 13
315
5
4
7
6
Micro
Controller AS5030
www.ams.com/AS5030 Revision 2.4 20 - 44
AS5030
Datasheet - Detailed Description
7.10 3-Wire Daisy Chain Mode
The Daisy Chain mode allows connection of more than one AS5030 to the same controller interface. Independent of the number of connected
devices, the interface to the controller remains the same with only three signals: CSn, CLK and DO. In Daisy Chain mode, the data from the
second and subsequent devices is appended to the data of the first device.
The 100nF buffer cap at the supply (shown only for the last device) is recommended for all devices.
The total number of serial bits is: n*21, where n is the number of connected devices: e.g. for 2 devices, the serial bit stream is 42bits. For three
devices it is 63 bits.
Figure 17. Connection of Devices in 3-wire Daisy Chain Mode
Figure 18. Timing Diagram in 3-wire Daisy Chain Mode
#1
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
Output DX
#2
CS
CLK
DIO
C2
VDD
13
11
10
12
15
C1 VSS
314
DX
(last device)
CS
CLK
DIO
C2
VDD
13
11
10
12
15
C1 VSS
314
DX
AS5030 AS5030 AS5030
Micro
Controller
CLK
CS
AS5030 # 1
CMD 3
DIO
123 45678
CMD 1CMD 2 CMD0 D15 D14 D13CMD 4 CMD 3
20 21 22 23 24 25 26
CMD 1CMD 2 CMD 0 D 15 D14 D13CMD4
27 28 29
D0 CMD 3
41 42 43 44
CMD2
CMD 4
D0
AS5030 #2 AS5030 #3
www.ams.com/AS5030 Revision 2.4 21 - 44
AS5030
Datasheet - Detailed Description
7.11 2-Wire Daisy Chain Mode
The AS5030 can also be connected in 2-wire Daisy Chain mode, requiring only two signals (Clock and Data) for any given number of daisy-
chained devices. Note that the connection of all devices except the last device is the same as for the 3-wire connection (see Figure 17). The last
device must have pin C2 (#15) set to ‘high’ and feeds the DX signal to CS of the first device.
Again, each device should be buffered with a 100nF cap (shown only for the last device).
The total number of serial bits is: n*21, where n is the number of connected devices. Note that this configuration requires one extra clock (#1) to
initiate the generation of the CS signal for the first device. After reading the last device, the communication must be reset back to the first device
by introducing a timeout of CLK (no rising edge for >24µs)
Figure 19. 2-wire Daisy Chain Mode
Figure 20. Timing Diagram in 2-wire Daisy Chain Mode
#1
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
DX
#2
CS
CLK
DIO
C2
VDD
13
11
10
12
15
C1 VSS
314
DX
(last device)
CS
CLK
DIO
C2
VDD
13
11
10
12
15
C1 VSS
314
DX
AS5030
Micro
Controller AS5030 AS5030
CLK
CS (#1)
AS 5030 # 1
CMD 3
DIO
123 45678
CMD 1CMD 2 CMD 0 D15 D14
CMD 4 CMD 3
21 22 23 24 25 26
CMD 1CMD 2 CMD 0 D 15 D14CMD 4
27 28 29
D0 CMD 3
42 43 44
CMD 2
CMD 4
D0
AS5030 # 2 AS5030 # 3
CS (#2)
CS (#3)
45
www.ams.com/AS5030 Revision 2.4 22 - 44
AS5030
Datasheet - Application Information
8 Application Information
AS5030 Parameter and Features List.
Parameter Description
Supply voltage 5V ± 10%
Supply current
Low Power Mode, non-operational: typ. 1.4mA
Ultra-low Power Mode, non-operational: typ. 30µA
Normal operating mode: typ. 14mA.
Absolute output; Serial Interface
21-bit Synchronous Serial Interface (SSI): 5 command bits, 2 data valid bits, 6 data bits for magnetic
field strength, 8 data bits for angle.
Configurable for 2-wire (Clock, Data) or 3-wire (Chip Select, Clock, Data) operation
Daisy Chain mode for reading multiple encoders through a 2- or 3-wire interface.
Zero Position Programming (OTP)
SSI clock rate ≤ 6 MHz data clock rate, 250 ~ 500kHz during programming
2-wire readout mode DIO and CLK signals. 0.1 ~ 6MHz clock rate. Synchronization through time-out of CLK signal.
Power down modes
Activated and deactivated by software commands.
Low Power Mode: power down current = 1.4mA typ.; power up time <150µs
Ultra-low Power Mode: power down current = 30µA typ.; power up time <500µs
Digital input cells CLK, CS = Schmitt trigger inputs
SIN-COS mode Sine, inverse Sine, Cosine and inverse Cosine outputs. 360° per period.
Maximum speed 30.000 rpm with locked ADC
Resolution and accuracy Resolution = 8-bit (1.406°)
Accuracy ≤ ± 2° with centered magnet
Transition noise 0.24°rms (1 sigma)
PWM output 2.26µs / Step, PWM will be permanently low when angular data is not valid (e.g. during startup).
Digital output current 4mA @ VDD = 5V (PWM, DIO, DX, MagRngn outputs)
OTP programming mode
Through serial interface with static programming voltage on pin #2 (PROG)
16-bit OTP programming register. OTP user programming options:
Angular zero position: 8 bit
Hall element sensitivity: 2 bit
Magnetic field range
Trimmable in four steps with OTP programming (sensitivity)
maximum/minimum ratio ~ 2.5:1. Field range window = 20 ~ 80mT
(e.g. maximum sensitivity range = 20 ~ 48mT, minimum sensitivity range = 32 ~ 80mT
Non-valid-range indication By hardware: MagRngn pin indicates locked condition of ADC
By software: LOCK1&2 status bits indicate locked condition of ADC
Start-up timings
Start-up time after shutdown < 2ms
Start-up time after power-down from Ultra-low Power Mode: < 500µs
Start-up time after power-down from Low Power Mode: < 150µs
ESD protection ± 2kV
Operating temperature -40°C ~ +125°C
www.ams.com/AS5030 Revision 2.4 23 - 44
AS5030
Datasheet - Application Information
8.1 AS5030 Programming
The AS5030 has an integrated 18-Bit OTP ROM for configuration purposes.
8.1.1 OTP Programming Options
The OTP programming options can be set permanently by programming or temporarily by overwriting. Both methods are carried out over the
serial interface, but with different commands (WRITE OTP, PROG OTP).
Note: During the 18bit OTP programming, each bit needs 4 clock pulses to be validated.
Zero Position Programming
This programming option allows the user to program any rotation angle of the magnet as the new zero position. This useful feature simpli-
fies the assembly process as the magnet does not need to be mechanically adjusted to the electrical zero position. It can be assembled in
any rotation angle and later matched to the mechanical zero position by zero position programming.
The 8-bit user programmable zero position can be applied both temporarily (command WRITE OTP, #1FH) or permanently (command
PROG OTP, #19H)
Magnetic Field Optimization
This programming option allows the user to match the vertical distance of the magnet with the optimum magnetic field range of the AS5030
by setting the sensitivity level.
The 2-bit user programmable sensitivity setting can be applied both temporarily (command WRITE OTP, #1FH) or permanently (command
PROG OTP, #19H)
8.1.2 Reduced Power Mode Programming Options
These temporary programming options are also carried out over the serial interface.
Low Power Mode
Low Power Mode is a power saving mode with fast start-up. In Low Power Mode, all internal digital registers are frozen and the power con-
sumption is reduced to max. 1.5mA. The serial interface remains active. Start-up from this mode to normal operation can be accomplished
within 150µs. This mode is recommended for applications, where low power, but fast start-up and short reading cycle intervals are required.
Ultra-low Power Mode
Ultra-low Power Mode is a power saving mode with even reduced power-down current consumption. In this mode, all chip functions are fro-
zen and the power consumption is reduced to max. 50µA. The serial interface remains active. Start-up from this mode to normal operation
can be accomplished within 500µs. This mode is recommended for applications, where very low average power consumption is required,
e.g. for battery operated equipment. For example, in a cycled operation with 10 readings per second, the average power consumption of the
AS5030 can be reduced to only 120µA.
8.2 AS5030 Read / Write Commands
Data transmission with the AS5030 is handled over the 2-wire or 3-wire interface. The transmission protocol begins with sending a 5-bit
command to the AS5030, followed by reading or writing 16 or 18 bits of data:
8.2.1 16-bit Read Command
C2 displays status of hardware pin C2 (pin #15)
Lock indicates that the AGC is locked. Data is invalid when this bit is 0
AGC 6-bit AGC register. Indicates the strength of the magnet (e.g. for push-button applications)
000000b indicates a strong magnetic field
111111b indicates a weak magnetic field
ideally, the vertical distance of the magnet should be chosen such that the AGC value is in the middle (around 100000b)
Angle 8-bit Angle value; represents the rotation angle of the magnet. One step = 360°/256 = 1.4°
Command Bin Hex D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
RD
ANGLE 00000 00 C2 lock AGC 5:0 Angle 7:0
www.ams.com/AS5030 Revision 2.4 24 - 44
AS5030
Datasheet - Application Information
8.2.2 16-bit Write Command
These settings are temporary; they cannot be programmed permanently. The settings will be lost when the power supply is removed.
EN PROG command must be sent with a fixed 16-bit code (8CAEH) to enable subsequent OTP access.
ULP/LPn selects the Ultra-low Power Mode, when bit PSM is set: 0 = Low Power Mode, 1 = Ultra-low Power Mode
PSM enables power saving modes: 0 = normal operation, 1 = reduced power mode selected by bit ULP/LPn
HYS disables the hysteresis of the digital serial and PWM outputs:
0 (default) = 1-bit hysteresis, 1 = no hysteresis
DIS AGC disables the automatic gain control. The AGC will be frozen to a gain setting written in bits AGC 5:0 (D6:D1), bit FA must be set.
rst General Reset: 0 = normal operation, 1 = perform general reset (required after return from reduced power modes)
FA Freeze AGC; 0 = normal operation, 1= freeze AGC with the values stored in bits AGC 5:0. The PWM output will be invalid when bit FA is set.
8.2.3 18-bit OTP Read Commands
Note: To prohibit unintentional access to the OTP register, OTP PROG/write access is only enabled after the EN PROG command has been
sent. OTP access is locked again by sending a RD ANGLE or SET PWR MODE command.
EN PROG need not to be sent before a READ OTP.
During the 18bit OTP read/write transfer, each bit needs 4 clock pulses to be validated.
READ OTP reads the contents of the OTP register in digital form. The reserved area may contain any value
ANALOG OTP RD reads the contents of the OTP register as an analog voltage at pin PROG
sens reads the sensitivity setting of the Hall elements: 00 = low sensitivity, 11 = high sensitivity
zero position reads the programmed zero position; the actual angle of the magnet which is displayed as 000
Command Bin Hex D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
EN PROG1000010 1 0 00110010101110
SET PWR
MODE 10001 11 ULP/
LPn PSM 0
DIS HYST 10011 13 HYS 0
DIS AGC 10101 15 0 0 0 0 0 rst 0 0 0 AGC 5:0 FA
Command Bin Hex D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
READ OTP 01111 0F reserved for factory settings sens
1:0
zero position
7:0
ANALOG
OTP RD 01001 09 reserved for factory settings sens
1:0
zero position
7:0
www.ams.com/AS5030 Revision 2.4 25 - 44
AS5030
Datasheet - Application Information
8.2.4 18-bit OTP Write Commands
During the 18bit OTP read/write transfer, each bit needs 4 clock pulses to be validated.
WRITE OTP: non-permanent (“soft write”) modification of the OTP register. To set the reserved factory settings area properly, a preceding READ
OTP command must be made to receive the correct setting for bits D17:D10. The WRITE OTP command must then set these bits in exactly the
same way. Improper setting of the factory settings by a WRITE OTP command may cause malfunction of the chip. The OTP register, including
the factory settings can be restored to default by a power-up cycle.
For non-permanent writing, a programming voltage at pin PROG (#2) is not required. EN_PROG must be sent before WRITE_OTP to enable
OTP.
PROG OTP: permanent modification of the OTP register. An unprogrammed OTP bit contains a ‘0, programmed bits are 1’s. It is possible to
program the OTP in several sequences. However, only a 0 can be programmed to 1. Once programmed, an OTP bit cannot be set back to 0. For
subsequent programming, bits that are already programmed should be set to 0 to avoid double programming.
During permanent programming, the factory settings D17:D10 should always be set to zero to avoid modification of the factory settings.
Modifying the factory settings may cause irreversible malfunction of the chip.
For permanent programming, a static programming voltage of 8.0-8.5V must be applied at pin PROG (#2). EN_PROG must be sent before
PROG_OTP to enable OTP.
sens sets the sensitivity setting of the Hall elements:
00: gain factor = 1.65 (low sensitivity)
01: gain factor = 1.75
10: gain factor = 1.86
11: gain factor = 2.00 (high sensitivity)
zero position sets the user programmable zero position; the actual angle of the magnet which is displayed as 000
Figure 21. Timing Diagram in OTP 18-bit Read/Write Mode
Command Bin Hex D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
WRITE
OTP 11111 1F copy factory settings
obtained from READ OTP command
sens
1:0
zero position
7:0
PROG OTP 11001 19 00000000
reserved for factory settings,
sens
1:0
zero position
7:0
HI HI CMD0
DCLK
CS
DIO
t0
t2 t5
t3 t4
DIO t6
Command phase Data phase extended
D17
DIO
CMD2
D17
D16
D16
t7
t8
t11 t12
t10 READ
t13
WRITE
t1 t9
D0
D0
www.ams.com/AS5030 Revision 2.4 26 - 44
AS5030
Datasheet - Application Information
8.3 OTP Programming Connection
Programming of the AS5030 OTP memory does not require a dedicated programming hardware. The programming can be simply accomplished
over the serial 3-wire interface (see Figure 22) or the optional 2-wire interface (see Figure 8).
For permanent programming (command PROG OTP, #19H), a constant DC voltage of 8.0V ~ 8.5V (≥100mA) must be connected to pin #2
(PROG).
For temporary OTP write (“soft write”; command WRITE OTP, #1FH), the programming voltage is not required.
To secure unintentional programming, any modification of the OTP memory is only enabled after a special password (command #10H) has been
sent to the AS5030.
Figure 22. OTP Programming Connection
8.3.1 Programming in Daisy Chain Mode
Programming in Daisy chain mode is possible for both 3-wire and 2-wire mode (see Figure 17 and Figure 19). For temporary programming (soft
write), no additional connections are required. Programming is executed with the respective programming commands. For permanent
programming, the programming voltage must be applied on pin#2 (PROG) of the device to be programmed. It is also possible to apply the
programming voltage simultaneously to all devices, as the actual programming is only executed by a software command.
A parallel connection of all PROG-pins allows digital programming verification but does not allow analog programming verification.
If analog programming verification is required, each PROG pin must be selected individually for verification.
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
Output
8. 0 – 8.5V PROG
2
10µF 100n
Micro
Controller AS5030
www.ams.com/AS5030 Revision 2.4 27 - 44
AS5030
Datasheet - Application Information
8.4 Programming Verification
After programming, the programmed OTP bits may be verified in two ways:
- By digital verification:
this is simply done by sending a READ OTP command (#0FH). The structure of this register is the same as for the OTP PROG or OTP WRITE
commands.
- By analog verification:
By sending an ANALOG OTP READ command (#09H), pin PROG becomes an output, sending an analog voltage with each clock, representing
a sequence of the bits in the OTP register. A voltage of <500mV indicates a correctly programmed bit (“1”) while a voltage level between 2.2V
and 3.5V indicates a correctly unprogrammed bit (“0”). Any voltage level in between indicates improper programming.
Figure 23. Analog OTP Verification
8.5 AS5030 Status Indicators
Refer to 16-bit Read Command on page 23.
8.5.1 C2 Status Bit
This bit represents the hardware connection of the C2 configuration pin (#15) to determine, which hardware configuration is selected for the
AS5030 in question.
C2 = low: pin C2 is ‘low’, indicating that the AS5030 is in 3-wire mode or a member of a 2-wire daisy chain connection (except the last)
C2 = high: pin C2 is ‘high’, indicating that the AS5030 is in 2-wire mode and/or the last member of a 2-wire daisy chain connection
8.5.2 Lock Status Bit
The Lock signal indicates the ADC lock status. If Lock = low (ADC unlocked), the angle information is invalid.
To determine a valid angular signal at best performance, the following indicators should be set:
Lock = 1
AGC > 00H and < 2FH
Note: The angle signal may also be valid (Lock = 1), when the AGC is out of range (00H or 2FH), but the accuracy of the AS5030 may be
reduced due to the out of range condition of the magnetic field strength.
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
Output
PROG
2
V
Micro
Controller AS5030
www.ams.com/AS5030 Revision 2.4 28 - 44
AS5030
Datasheet - Application Information
8.5.3 Magnetic Field Strength Indicators
The AS5030 is not only able to sense the angle of a rotating magnet, it can also measure the magnetic field strength (and hence the vertical
distance) of the magnet.
This extra feature can be used for several purposes:
- as a safety feature by constantly monitoring the presence and proper vertical distance of the magnet
- as a state-of-health indicator, e.g. for a power-up self test
- as a push-button feature for rotate-and-push types of manual input devices
The magnetic field strength information is available in two forms:
Magnetic Field Strength Hardware Indicator: Pin MagRngn (#1) will be ‘high’, when the magnetic field is too weak. The switching limit is
determined by the value of the AGC. If the AGC value is <3FH, the MagRngn output will be ‘low’ (green range), If the AGC is at its upper limit
(3FH), the MagRngn output will be ‘high’ (red range).
Magnetic Field Strength Software Indicator: D13:D7 in the serial data that is obtained by command READ ANGLE contains the 6-bit
AGC information. The AGC is an automatic gain control that adjusts the internal signal amplitude obtained from the Hall elements to a constant
level. If the magnetic field is weak, e.g. with a large vertical gap between magnet and IC, with a weak magnet or at elevated temperatures of the
magnet, the AGC value will be ‘high’. Likewise, the AGC value will be lower when the magnet is closer to the IC, when strong magnets are used
and at low temperatures.
The best performance of the AS5030 will be achieved when operating within the AGC range. It will still be operational outside the AGC range, but
with reduced performance especially with a weak magnetic field due to increased noise.
Factors Influencing the AGC Value. In practical use, the AGC value will depend on several factors:
The initial strength of the magnet. Aging magnets may show a reducing magnetic field over time which results in an increase of the AGC
value. The effect of this phenomenon is relatively small and can easily be compensated by the AGC.
The vertical distance of the magnet. Depending on the mechanical setup and assembly tolerances, there will always be some variation of
the vertical distance between magnet and IC over the lifetime of the application using the AS5030. Again, vertical distance variations can be
compensated by the AGC
The temperature and material of the magnet. The recommended magnet for the AS5030 is a diametrically magnetized, 5-6mm diameter
NdFeB (Neodymium-Iron-Boron) magnet. Other magnets may also be used as long as they can maintain to operate the AS5030 within the
AGC range.
Every magnet has a temperature dependence of the magnetic field strength. The temperature coefficient of a magnet depends on the used
material. At elevated temperatures, the magnetic field strength of a magnet is reduced, resulting in an increase of the AGC value. At low
temperatures, the magnetic field strength is increased, resulting in a decrease of the AGC value.
The variation of magnetic field strength over temperature is automatically compensated by the AGC.
OTP Sensitivity Adjustment. To obtain best performance and tolerance against temperature or vertical distance fluctuations, the AGC value
at normal operating temperature should be in the middle between minimum and maximum, hence it should be around 100000 (20H).
To facilitate the “vertical centering” of the magnet+IC assembly, the sensitivity of the AS5030 can be adjusted in the OTP register in 4 steps. A
sensitivity adjustment is recommended, when the AGC value at normal operation is close to its lower limit (around 00H). The default sensitivity
setting is 00H = low sensitivity.
8.5.4 “Push-button” Feature
Using the magnetic field strength software and hardware indicators described above, the AS5030 provides a useful method of detecting both
rotation and vertical distance simultaneously. This is especially useful in applications implementing a rotate-and-push type of human interface
(e.g. in panel knobs and switches).
The MagRngn output is ‘high’, when the magnetic field is below the low limit (weak or no magnet) and low when the magnetic field is above the
low limit (in-range or strong magnet).
A finer detection of a vertical distance change, for example when only short vertical strokes are made by the push-button, is achieved by
memorizing the AGC value in normal operation and triggering on a change from that nominal the AGC value to detect a vertical movement.
www.ams.com/AS5030 Revision 2.4 29 - 44
AS5030
Datasheet - Application Information
Figure 24. Magnetic Field Strength Indicator
8.6 High Speed Operation
The AS5030 is using a fast tracking ADC (TADC) to determine the angle of the magnet. The TADC has a tracking rate of 1.15µs (typ).
Once the TADC is synchronized with the angle, it sets the LOCK bit in the status register. In worst case, usually at start-up, the TADC requires a
maximum of 127 steps (127 * 1.15µS = 146.05µs) to lock. Once it is locked, it requires only one cycle (1.15µs) to track the moving magnet.
The AS5030 can operate in locked mode at rotational speeds up to 30.000 rpm.
In Low Power Mode or Ultra-low Power Mode, the position of the TADC is frozen. It will continue from the frozen position once it is powered up
again. If the magnet has moved during the power down phase, several cycles will be required before the TADC is locked again. The tracking time
to lock in with the new magnet angle can be roughly calculated as:
(EQ 3)
Where:
tLOCK = time required to acquire the new angle after power up from one of the reduced power modes [µs]
OldPos = Angle position when one of the reduced power modes is activated [°]
NewPos = Angle position after resuming from reduced power mode [°]
8.6.1 Propagation Delay
The Propagation delay is the time required from reading the magnetic field by the Hall sensors to calculating the angle and making it available on
the serial or PWM interface. While the propagation delay is usually negligible on low speeds it is an important parameter at high speeds.
The longer the propagation delay, the larger becomes the angle error for a rotating magnet as the magnet is moving while the angle is calculated.
The position error increases linearly with speed.
The main factors contributing to the propagation delay are:
ADC Sampling Rate. For high speed applications, fast ADCs are essential. The ADC sampling rate directly influences the propagation delay.
The fast tracking ADC used in the AS5030 with a tracking rate of only 1.15µs (typ.) is a perfect fit for both high speed and high performance.
100n
CS
CLK
DIO
+5 V
VDD
VSS
VSS C 2
VDDVDD
13
11
10
12
15
C1 VSS
314
I/O
Output
Output
MagRngn
1
LED 1
1k
Micro
Controller AS5030
OldPosNewPosstLOCK −∗=
μ
15.1
www.ams.com/AS5030 Revision 2.4 30 - 44
AS5030
Datasheet - Application Information
Chip Internal Low-pass Filtering. A commonplace practice for systems using analog-to-digital converters is to filter the input signal by an
anti-aliasing filter. The filter characteristic must be chosen carefully to balance propagation delay and noise.
The low-pass filter in the AS5030 has a cut-off frequency of typ. 23.8kHz and the overall propagation delay in the analog signal path is typ.
15.6µs.
Digital Readout Rate. Aside from the chip-internal propagation delay, the time required to read and process the angle data must also be
considered. Due to its nature, a PWM signal is not very usable at high speeds, as you get only one reading per PWM period. Increasing the
PWM frequency may improve the situation but causes problems for the receiving controller to resolve the PWM steps. The frequency on the
AS5030 PWM output is typ. 1.95kHz with a resolution of 2µs/step.
A more suitable approach for high speed absolute angle measurement is using the serial interface. With a clock rate of up to 6MHz, a complete
set of data (21bits) can be read in >3.5µs
8.6.2 Total Propagation Delay of the AS5030
The total propagation delay of the AS5030 is the delay in the analog signal path and the tracking rate of the ADC:
15.6µs + 1.15µs = 16.75µs.
If only the SIN-/COS-outputs are used, the propagation delay is the analog signal path delay only (typ. 15.6µs).
Position Error over Speed.
The angle error over speed caused by the propagation delay is calculated as:
Δφpd = rpm * 6 * 16.75E-6 in degrees (EQ 4)
In addition, the anti-aliasing filter causes an angle error calculated as:
Δφlpf = ArcTan [ rpm / ( 60*f0 ) ] (EQ 5)
Examples of the overall position error caused by speed, including both propagation delay and filter delay:
8.7 Reduced Power Modes
The AS5030 can be operated in 3 reduced power modes. All 3 modes have in common that they switch off or freeze parts of the chip during
intervals between measurements. In Low Power Mode or Ultra-low Power Mode, the AS5030 is not operational, but due to the fast start-up, an
angle measurement can be accomplished very quickly and the chip can be switched to reduced power immediately after a valid measurement
has been taken. Depending on the intervals between measurements, very low average power consumption can be achieved using such a
strobed measurement mode.
Low Power Mode:reduced current consumption, very fast start-up. Ideal for short sampling intervals (<3ms)
Ultra-low Power Mode:further reduced current consumption, but slower start-up than Low Power Mode. Ideal for sampling intervals from
3….200ms
Power Cycle mode:zero power consumption (externally switched off) during sampling intervals, but slower start-up than Ultra-low Power
Mode. Ideal for sampling intervals 200ms
Speed (rpm) Total Position Error
(Δφpd + Δφlpf)
100 0.0175°
1000 0.175°
10000 1.75°
www.ams.com/AS5030 Revision 2.4 31 - 44
AS5030
Datasheet - Application Information
8.7.1 Low Power Mode and Ultra-low Power Mode
Figure 25. Low Power Mode and Ultra-low Power Mode Connection
The AS5030 can be put in Low Power Mode or Ultra-low Power Mode by simple serial commands, using the regular connection for 2-wire or 3-
wire serial data transmission (see Figure 4 and Figure 8).
The required serial command is SET PWR MODE (11H):
Note: After returning from Low Power mode or Ultra-low Power mode to normal operation (PSM = 0), if the Hysteresis is enabled (Hys=0), a
general reset must be performed: set bit RST and then clear bit RST using command 15H.
The two following cases describe the typical loop programmed in the software:
Hys = 0. (1 LSB hysteresis)
1. Wait for CPU interrupt or delay for next angle read (typ. <3ms in LP mode, typ>3ms in ULP mode)
2. Wake up (PSM = 0)
3. Set Reset (rst = 1)
4. Clear Reset (rst = 0)
5. Wait 1.5ms (Low Power Mode)
6. Check if Lock = 1 then read angle
7. Enable Low Power Mode or Ultra-low Power Mode (PSM=1)
8. Return to 1
ULP / LPn PSM Mode
0 0 Normal operation
0 1 Low Power Mode
1 0 Normal operation
1 1 Ultra-low Power Mode
AS5030
Micro
Controller
100n CS
CLK
DIO
+5V
VDD
VSS
VSSVSS
VDD VDD
on/off
S N
ton toff
Ion
Ioff
C1 C2
R1: optional;
see text
C1:
optional;
see text
www.ams.com/AS5030 Revision 2.4 32 - 44
AS5030
Datasheet - Application Information
Hys = 1. (No hysteresis)
1. Wait for CPU interrupt or delay for next angle read (typ. <3ms in LP mode, typ>3ms in ULP mode)
2. Wake up (PSM = 0)
3. Wait 0.01ms (Low Power Mode)
4. Check if Lock = 1 then read angle
5. Enable Low Power Mode or Ultra-low Power Mode (PSM=1)
6. Return to 1
The difference between Low Power Mode and Ultra-low Power Mode is the current consumption and the wake-up time to switch back to active
operation.
In both Reduced Power Modes, the AS5030 is inactive. The last state, e.g. the angle, AGC value, etc. is frozen and the chip starts from this
frozen state when it resumes active operation. This method provides much faster start-up than a “cold start” from zero. If the AS5030 is cycled
between active and reduced current mode, a substantial reduction of the average supply current can be achieved. The minimum dwelling time in
active mode is the wake-up time. The actual active time depends on how much the magnet has moved while the AS5030 was in reduced power
mode. The angle data is valid, when the status bit LOCK has been set. Once a valid angle has been measured, the AS5030 can be put back to
reduced power mode. The average power consumption can be calculated as:
(EQ 6)
sampling interval = ton + toff
Where:
Iavg average current consumption
Iactive: current consumption in active mode
Ipower_down:current consumption in reduced power mode
ton:time period during which the chip is operated in active mode
toff: time period during which the chip is in reduced power mode
Example: Ultra-low Power Mode; sampling period = one measurement every 10ms.
System constants = Iactive = 14mA, Ipower_down = 30µA, ton(min) = 500µs (startup from Ultra-low Power Mode):
(EQ 7)
See Figure 27 for an overview table of the average current consumption in the various reduced power modes.
Reducing Power Supply Peak Currents.
An optional RC-filter (R1/C1) may be added to avoid peak currents in the power supply line when the AS5030 is toggled between active and
reduced power mode. R1 must be chosen such that it can maintain a VDD voltage of 4.5V ~ 5.5V under all conditions, especially during long
active periods when the charge on C1 has expired. C1 should be chosen such that it can support peak currents during the active operation
period. For long active periods, C1 should be large and R1 should be small.
Mode Current Consumption
(typ.)
Wake-up Time to Active
Operation
Active operation 14 mA 1.0 ms (without AGC)
3.8 ms (with locked AGC)
Low Power Mode 1.4 mA 0.15 ms
Ultra-low Power Mode 30 µA 0.5 ms
offon
offdownpoweronactive
avg tt
tItI
I+
∗+∗
=_
A
mss msAsmA
Iavg
μ
μ
μ
μ
729
5,9500 5,9*3050014 =
+
+∗
=
www.ams.com/AS5030 Revision 2.4 33 - 44
AS5030
Datasheet - Application Information
8.7.2 Power Cycling Mode
The power cycling method shown in Figure 26 cycles the AS5030 by switching it on and off, using an external PNP transistor high side switch.
This mode provides the least power consumption of all three modes; when the sampling interval is more than 400ms, as the current consumption
in off-mode is zero.
It also has the longest start-up time of all modes, as the chip must always perform a “cold start“ from zero, which takes about 1.9 ms.
The optional filter R1/C1 may again be added to reduce peak currents in the 5V power supply line.
Figure 26. Application Example III: Ultra-low Power Encoder
Figure 26 shows an overview of the average supply currents in the three reduced power modes, depending on the sampling interval. The graphs
shows that the Low Power Mode is the best option for sampling intervals <4ms, while the Ultra-low Power Mode is the best option for sampling
intervals between 4~400ms. At sampling intervals > 400ms, the power cycling mode is the best method to minimize the average current
consumption. The curves are based on the figures given in Low Power Mode and Ultra-low Power Mode on page 31.
Figure 27. Average Current Consumption of Reduced Power Modes
Micro
Controller
+5V
VDD
VSS
VSS
VDD
10k
on/off
C1
>1µF
R1
ton toff
AS5030
100n CS
CLK
DIO
VSS
VDD
S N
C1 C2
ton toff
Ion
0
AS5030 av erage current consum ption
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
1 10 100 1000
sampling interval [ ms]
avg. curr e nt consumption [ m
A
Low Power Mode
Power Cycling Mode
Ultra L o w P o we r M o d e
www.ams.com/AS5030 Revision 2.4 34 - 44
AS5030
Datasheet - Application Information
8.8 Accuracy of the Encoder System
This chapter describes which individual factors influence the accuracy of the encoder system and how to improve them.
Accuracy is defined as the difference between measured angle and actual angle. This is not to be confused with resolution, which is the smallest
step that the system can resolve.
The two parameters are not necessarily linked together. A high resolution encoder may not necessarily be highly accurate as well.
8.8.1 Quantization Error
There is however a direct link between resolution and accuracy, which is the quantization error:
Figure 28. Quantization Error of a Low Resolution and a High Resolution System
The resolution of the encoder determines the smallest step size. The angle error caused by quantization cannot get better than ± ½ LSB. As
shown in Figure 28, a higher resolution system (right picture) has a smaller quantization error, as the step size is smaller.
For the AS5030, the quantization error is ± ½ LSB = ± 0.7°
Figure 29. Typical INL Error Over 360°
+½ LSB
-½ LSB
ideal function
digitized
function
low
resolution
ideal function
digitized
function
+½ LSB
-½ LSB
error
high
resolution
Quantization
Error
I NL i ncluding qua nt i zat ion er r or
-1,5
-1
-0,5
0
0,5
1
1,5
0 45 90 135 180 225 270 315 360
Ang le steps
INL [° ]
INL A verage (16x)
www.ams.com/AS5030 Revision 2.4 35 - 44
AS5030
Datasheet - Application Information
Figure 29 shows a typical example of an error curve over a full turn of 360° at a given X-Y displacement. The curve includes the quantization
error, transition noise and the system error. The total error is ~2.2° peak/peak (± 1.1°).
The sawtooth-like quantization error (see also Figure 28) can be reduced by averaging, provided that the magnet is in constant motion and there
are an adequate number of samples available. The solid bold line in Figure 29 shows the moving average of 16 samples. The INL (intrinsic non-
linearity) is reduced to from ~± 1.1° down to ~± 0.3°. The averaging however, also increases the total propagation delay, therefore it may be
considered for low speeds only or adaptive; depending on speed (see Position Error over Speed on page 30).
8.8.2 Vertical Distance of the Magnet
The chip-internal automatic gain control (AGC) regulates the input signal amplitude for the tracking-ADC to a constant value. This improves the
accuracy of the encoder and enhances the tolerance for the vertical distance of the magnet.
Figure 30. Typical Curves for Vertical Distance Versus ACG Value on Several Untrimmed Samples
As shown in Figure 30, the AGC value (left Y-axis) increases with vertical distance of the magnet.
Consequently, it is a good indicator for determining the vertical position of the magnet, for example as a push-button feature, as an indicator for a
defective magnet or as a preventive warning (e.g. for wear on a ball bearing etc.) when the nominal AGC value drifts away.
If the magnet is too close or the magnetic field is too strong, the AGC will be reading 0,
If the magnet is too far away (or missing) or if the magnetic field is too weak, the AGC will be reading 63 (3FH).
The AS5030 will still operate outside the AGC range, but the accuracy may be reduced as the signal amplitude can no longer be kept at a
constant level.
The linearity curve in Figure 30 (right Y-axis) shows that the accuracy of theAS5030 is best within the AGC range, even slightly better at small
airgaps (0.4mm ~ 0.8mm).
At very short distances (0mm ~ 0.1mm) the accuracy is reduced, mainly due to nonlinearities in the magnetic field.
At larger distances, outside the AGC range (~2.0mm ~ 2.5mm and more) the accuracy is still very good, only slightly decreased from the nominal
accuracy.
Since the field strength of a magnet changes with temperature, the AGC will also change when the temperature of the magnet changes. At low
temperatures, the magnetic field will be stronger and the AGC value will decrease. At elevated temperatures, the magnetic field will be weaker
and the AGC value will increase.
Linearity and AGC vs Airgap
0
8
16
24
32
40
48
56
64
0 500 1000 1500 2000 2500
Airgap [mm]
AGC value
1,0
1,2
1,4
1,6
1,8
2,0
2,2
Line arity [°]
sample#1 sample#2 sample#3 sample#4 Lineari ty [°]
[µm ]
www.ams.com/AS5030 Revision 2.4 36 - 44
AS5030
Datasheet - Application Information
Sensitivity Trimming. As the curves for the 4 samples in Figure 30 show, the AGC value will not show exactly the same value at a given
airgap on each part. For example, at 1mm vertical distance, the AGC may read a value between ~11 ~ 24. This is because for normal operation
an exact trimming is not required since the AGC is part of a closed loop system.
However, the AS5030 offers an optional user trimming in the OTP to allow an even tighter AGC tolerance for applications where the information
about magnetic field strength is also utilized, e.g. for rotate-and-push types of knobs, etc.
8.9 Choosing the Proper Magnet
Figure 31. Vertical Magnetic Fields of a Rotating Magnet
Note: There is no strict requirement on the type or shape of the magnet to be used with the AS5030. It can be cylindrical as well as square in
shape. The key parameter is that the vertical magnetic field Bz, measured at a radius of 1mm from the rotation axis is sinusoidal with a
peak amplitude of 20 ~ 80mT.
NS
Magnet axis
Vertical field
component
(20…80mT)
0360
Bz
Vertical field
component
R1 concentric circle;
radius 1.0 mm
R1
Magnet axis
typ. 6mm diameter
SN
www.ams.com/AS5030 Revision 2.4 37 - 44
AS5030
Datasheet - Application Information
8.9.1 Magnet Placement
Ideally, the center of the magnet, the diagonal center of the IC and the rotation axis of the magnet should be in one vertical line.
The lateral displacement of the magnet should be within ± 0.25mm from the IC package center or ± 0.5mm from the IC center, including
the placement of the chip within the IC package.
The vertical distance should be chosen such that the magnetic field on the die surface is within the specified limits. The typical
distance “z” between the magnet and the package surface is 0.5mm to 1.8mm with the recommended magnet (6mm x 2.5mm). Larger gaps are
possible, as long as the required magnetic field strength stays within the defined limits.
A magnetic field outside the specified range may still produce acceptable results, but with reduced accuracy. The out-of-range condition will be
indicated, when the AGC is at the limits
(AGC= 0: field too strong;
AGC=63=(3FH): field too weak or missing magnet.
Figure 32. Bz Field Distribution Along the X-Axis of a 6mmØ Diametric Magnetized Magnet
Figure 32 shows a cross sectional view of the vertical magnetic field component Bz between the north and south pole of a 6mm diameter
magnet, measured at a vertical distance of 1mm. The poles of the magnet (maximum level) are about 2.8mm from the magnet center, which is
almost at the outer magnet edges. The magnetic field reaches a peak amplitude of ~± 106mT at the poles.
The Hall elements are located at a radius of 1mm (indicated as squares at the bottom of the graph). Due to the side view, the two Hall elements
at the Y-axis are overlapping at X = 0mm, therefore only 3 Hall elements are shown.
At 1mm radius, the peak amplitude is ~± 46mT, respectively a differential amplitude of 92mT.
The vertical magnetic field Bz follows a fairly linear pattern up to about 1.5mm radius. Consequently, even if the magnet is not perfectly centered,
the differential amplitude will be the same as for a centered magnet.
For example, if the magnet is misaligned in X-axis by -0.5mm, the two X-Hall sensors will measure 70mT (@x = -1.5mm) and
-22mt (@x = -0.5mm). Again, the differential amplitude is 92mT.
At larger displacements however, the Bz amplitude becomes nonlinear, which results in larger errors that mainly affect the accuracy of the
system (see also Figure 34)
www.ams.com/AS5030 Revision 2.4 38 - 44
AS5030
Datasheet - Application Information
Figure 33. Vertical Magnetic Field Distribution of a Cylindrical 6mm Ø Diametric Magnetized Magnet at 1mm Gap
Figure 33 shows the same vertical field component as Figure 32, but in a 3-dimensional view over an area of ± 4mm from the rotational axis.
8.9.2 Lateral Displacement of the Magnet
As shown in the magnet specifications (see page 7), the recommended horizontal position of the magnet axis with respect to the IC package
center is within a circle of 0.25mm radius. This includes the placement tolerance of the IC within the package.
Figure 34 shows a typical error curve at a medium vertical distance of the magnet around 1.2mm (AGC = 24).
The X- and Y- axis of the graph indicate the lateral displacement of the magnet center with respect to the IC center.
At X = Y = 0, the magnet is perfectly centered over the IC. The total displacement plotted on the graph is for ± 1mm in both directions.
The Z-axis displays the worst case INL error over a full turn at each given X-and Y- displacement. The error includes the quantization error of ±
0.7°. For example, the accuracy for a centered magnet is between 1.0 ~ 1.5° (spec = 2° over full temperature range). Within a radius of 0.5mm,
the accuracy is better than 2.0° (spec = 3° over temperature).
4
3
2
1
0
-1
-2
-3
-4
432210-1 -2 -3
-125
-100
-75
-50
-25
0
25
50
75
100
125
Bz [mT]
Y-displacemen t [mm]
X-displ acement [mm]
BZ; 6mm magnet @ Z=1mm
area of X-Y -misalignment from
center: +/- 0.5mm
c ircle of Hall elements on
chip: 1mm radius
N
S
www.ams.com/AS5030 Revision 2.4 39 - 44
AS5030
Datasheet - Application Information
Figure 34. Typical Error Curve of INL Error Over Lateral Displacement (including quantization error)
8.9.3 Magnet Size
Figure 32 to Figure 34 in this chapter describe a cylindrical magnet with a diameter of 6mm. Smaller magnets may also be used, but since the
poles are closer together, the linear range will also be smaller and consequently the tolerance for lateral misalignment will also be smaller.
If the ± 0.25mm lateral misalignment radius (rotation axis to IC package center) is too tight, a larger magnet can be used. Larger magnets have
a larger linear range and allow more misalignment. However at the same time the slope of the magnet is more flat which results in a lower
differential amplitude.
This requires either a stronger magnet or a smaller gap between IC and magnet in order to operate in the amplitude-controlled area (AGC > 0
and AGC < 63).
In any case, if a magnet other than the recommended 6mm diameter magnet is used, two parameters should be verified:
Verify that the magnetic field produces a sinusoidal wave, when the magnet is rotated. Note that this can be done with the SIN-/COS-
outputs of the AS5030, e.g. rotate the magnet at constant speed and analyze the SIN- (or COS-) output with an FFT-analyzer.
It is recommended to disable the AGC for this test.
Verify that the Bz-Curve between the poles is as linear as possible. This curve may be available from the magnet supplier(s). Alternatively,
the SIN- or COS- output of the AS5030 may also be used together with an X-Y- table to get a Bz-scan of the magnet. Furthermore, the
sinewave tests described above may be re-run at defined X-and Y- misplacements of the magnet to determine the maximum acceptable
lateral displacement range.
It is recommended to disable the AGC for both these tests.
Note: For preferred magnet suppliers, please refer to the ams website (Rotary Encoder section).
-1000-750-500 -250 0250 500 750 1000
-1000
-750
-500
-250
0
250
500
750
1000
0,000
0,500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
INL [°]
X Displaceme nt [µm]
Y Displacem ent [µm]
I NL vs. Di sp l acem ent: AS 5030 for AGC24
4,500-5,000
4,000-4,500
3,500-4,000
3,000-3,500
2,500-3,000
2,000-2,500
1,500-2,000
1,000-1,500
0,500-1,000
0,000-0,500
www.ams.com/AS5030 Revision 2.4 40 - 44
AS5030
Datasheet - Application Information
8.10 Physical Placement of the Magnet
The best linearity can be achieved by placing the center of the magnet exactly over the defined center of the chip as shown in the drawing below:
Figure 35. Defined Chip Center and Magnet Displacement Radius
Magnet Placement. The magnet’s center axis should be aligned within a displacement radius Rd of 0.25mm from the defined center of the IC.
The magnet may be placed below or above the device. The distance should be chosen such that the magnetic field on the die surface is within
the specified limits. The typical distance “z” between the magnet and the package surface is 0.5mm to 1.5mm, provided the use of the
recommended magnet material and dimensions (6mm x 3mm). Larger distances are possible, as long as the required magnetic field strength
stays within the defined limits.
However, a magnetic field outside the specified range may still produce usable results, but the out-of-range condition will be indicated by
MagRngn (pin 1).
Figure 36. Vertical Placement of the Magnet
1
Defined
center
2.3975 +/-0.055mm
3.2mm 3.2mm
Area of recommended maximum
magnet misalignment
Rd
2.3975 +/-0.055mm
0. 77 +/- 0.15mm
0. 23 +/- 0.1 mm
z
SN
Package surfaceDie surface
www.ams.com/AS5030 Revision 2.4 41 - 44
AS5030
Datasheet - Package Drawings and Markings
9 Package Drawings and Markings
The device is available in a 16-pin TSSOP package.
Figure 37. 16-pin TSSOP Package
Marking: YYWWMZZ.
YY WW MZZ
Last two digits of the Year Manufacturing Week Assembly plant identifier Assembly traceability code
Symbol Min Nom Max
A- -1.20
A1 0.05 - 0.15
A2 0.80 1.00 1.05
b0.19 - 0.30
c0.09 - 0.20
D 4.90 5.00 5.10
E - 6.40 BSC -
E1 4.30 4.40 4.50
e - 0.65 BSC -
L 0.45 0.60 0.75
L1 - 1.00 REF -
Symbol Min Nom Max
R0.09 - -
R1 0.09 - -
S0.20 - -
Θ10º 8º
Θ2 - 12 REF -
Θ3 - 12 REF -
aaa - 0.10 -
bbb - 0.10 -
ccc - 0.05 -
ddd - 0.20 -
N16
AS5030
YYWWMZZ
Notes:
1. Dimensioning & tolerancing conform
to ASME Y14.5M-1994.
2. All dimensions are in millimeters.
Angles are in degrees.
www.ams.com/AS5030 Revision 2.4 42 - 44
AS5030
Datasheet - Package Drawings and Markings
JEDEC Package Outline Standard: MO - 153 AB
Thermal Resistance Rth(j-a): 89 K/W in still air, soldered on PCB
9.1 Recommended PCB Footprint
Figure 38. PCB Footprint
Recommended Footprint Data
Symbol mm inch
A7.260.286
B4.930.194
C0.360.014
D0.650.0256
E4.910.193
www.ams.com/AS5030 Revision 2.4 43 - 44
AS5030
Datasheet - Ordering Information
10 Ordering Information
The devices are available as the standard products shown in Table 7.
Note: All products are RoHS compliant and ams green.
Buy our products or get free samples online at www.ams.com/ICdirect
Technical Support is available at www.ams.com/Technical-Support
For further information and requests, email us at sales@ams.com
(or) find your local distributor at www.ams.com/distributor
Table 7. Ordering Information
Ordering Code Description Delivery Form Package
AS5030-ATSU 1 box = 100 tubes á 96 devices Tubes 16-pin TSSOP
AS5030-ATST 1 reel = 4500 devices Tape & Reel 16-pin TSSOP
www.ams.com/AS5030 Revision 2.4 44 - 44
AS5030
Datasheet - Copyrights
Copyrights
Copyright © 1997-2013, ams AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights
reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the
copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG makes no
warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described
devices from patent infringement. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in normal
commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability
applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing
by ams AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard
production flow, such as test flow or test location.
The information furnished here by ams AG is believed to be correct and accurate. However, ams AG shall not be liable to recipient or any third
party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the
technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other
services.
Contact Information
Headquarters
ams AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel : +43 (0) 3136 500 0
Fax : +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.ams.com/contact
