ZSSC5101BE4T - ZMDI - Datasheet.Directory

Data Sheet

Rev. 1.21 / April 2015

ZSSC5101

xMR Sensor Signal Conditioner

Multi-Market Sensing Platforms

Precise and Deliberate

ZSSC5101

xMR Sensor Signal Conditioner

stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

For more information, contact ZMDI via PRODUCT@ZMDI.COM.

Brief Description

The ZSSC5101 is a CMOS integrated circuit for con-

verting sine and cosine signals obtained from

magnetoresistive bridge sensors into a ratiometric

analog voltage with a user-programmable range of

travel and clamping levels.

The ZSSC5101 accepts sensor bridge arrangements

for both rotational as well as linear movement.

Depending on the type of sensor bridge, a full-scale

travel range of up to 360 mechanical degrees can be

obtained.

Programming of the device is performed through the

output pin, allowing in-line programming of fully

assembled 3-wire sensors. Programming param-

eters are stored in an EEPROM and can be re-pro-

grammed multiple times.

The ZSSC5101 is fully automotive-qualified with an

ambient temperature range up to 160°C.

Features

 Ratiometric analog output

 Up to 4608 analog steps

 Step size as small as 0.022°

 Programming through output pin via

one-wire interface

 Offset and amplitude calibration of the

bridge input signals

 Programmable linear transfer characteristic:

 Zero position

 Angular range

 Upper and lower clamping levels

 Rising or falling slope

 Loss of magnet indication with programmable

threshold level

 Accepts anisotropic, giant, and tunnel magneto-

resistive bridge sensors (AMR, GMR and TMR)

 Programmable 32-bit user ID

 CRC, error detection, and error correction

on EEPROM data

 Diagnostics: broken-wire detection

 Automotive-qualified to AEC-Q100, grade 0

Benefits

 No external trimming components required

 PC-controlled configuration and single-pass

calibration via one-wire interface allows

programming of fully assembled sensors

 Can be used with low-cost ferrite magnets

 Allows large air gaps between sensors and

magnets

 Optimized for automotive environments with

extended temperature range and special

protection circuitry with excellent electro-

magnetic compatibility

 Power supply monitoring

 Sensor monitoring

 Detection of EEPROM memory failure

 Connection failure management

 High accuracy: ± 0.15° integral nonlinearity (INL)

after calibration

Available Support

 Evaluation Kit

 Application Notes

Physical Characteristics

 Wide operation temperature: -40 C to +160 C (die)

 Supply voltage: 4.5V to 5.5V

 SSOP-14 package, bare die, or unsawn wafer

ZSSC5101 Typical Application Circuit

ZSSC5101

VSINP

VSINN

VCOSP

VCOSN

VDDE

VSSE

Load

Circuit

VDDS

VSSS

VOUT Rout

+5V

Sensor Bridges

Cout

100nF

ZSSC5101

xMR Sensor Signal Conditioner

The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.

Applications

 Absolute Rotary Position Sensor

 Steering Wheel Position Sensor

 Pedal Position Sensor

 Throttle Position Sensor

 Float-Level Sensor

 Ride Height Position Sensor

 Non-Contacting Potentiometer

 Rotary Dial

Interface

Power Supply Regulators EEPROM

Cordic

Algorithm

One-Wire

Interface

DAC Buffer

Amp.

Analog Frontend AFE

MUX PGA ADC

Sin

Cos

VDDS

VSSS

VSINP

VDDS

VSSS

VDDS

VSSS

Digital Signal Processing and Control

VSINN

VCOSP

VCOSN

VDDE

VSSE

VOUT

ZSSC5101 Block Diagram

Application Circuit for AMR Sensors

ZSSC5101

VSINP

VSINN

VCOSP

VCOSN

VDDE

VSSE

Load

Circuit

VDDS

VSSS

VOUT Rout

+5V

AMR Sensor Bridge

Cout

100nF

Application Circuit for TMR Sensors

ZSSC5101

VSINP

VSINN

VCOSP

VCOSN

VDDE

VSSE

Load

Circuit

VDDS

VSSS

VOUT Rout

+5V

TMR Sensor Bridge

e.g., MDT MMA253F

Cout

100nF

GND

VCC

X+

X-

Y+

Y- Rs=51kΩ

Rp = 5kΩ to 10kΩ

Ordering Information

Sales Code

Description

Delivery Package

ZSSC5101BE1B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 390 ±15µm

ZSSC5101BE2B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 725 ±15µm

ZSSC5101BE3B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 250 ±15µm

ZSSC5101BE1C

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, sawn on frame, thickness = 390 ±15µm

ZSSC5101BE4R

ZSSC5101 SSOP-14 – Temperature range: -40°C to +150°C

13” tape and reel

ZSSC5101BE4T

ZSSC5101 SSOP-14 – Temperature range: -40°C to +150°C

Tube

ZSSC5101 KIT

Evaluation Kit: USB Communication Board, ZSSC5101 AMR board, adapters. Software is downloaded (see data sheet).

Sales and Further Information www.zmdi.com PRODUCT@ZMDI.COM

Zentrum Mikroelektronik

Dresden AG

Global Headquarters

Grenzstrasse 28

01109 Dresden, Germany

Central Office:

Phone +49.351.8822.306

Fax +49.351.8822.337

ZMD America, Inc.

1525 McCarthy Blvd., #212

Milpitas, CA 95035-7453

USA

USA Phone 1.855.275.9634

Zentrum Mikroelektronik

Dresden AG, Japan Office

2nd Floor, Shinbashi Tokyu Bldg.

4-21-3, Shinbashi, Minato-ku

Tokyo, 105-0004

Japan

ZMD FAR EAST, Ltd.

3F, No. 51, Sec. 2,

Keelung Road

11052 Taipei

Taiwan

Zentrum Mikroelektronik

Dresden AG, Korea Office

U-space 1 Building

Unit B, 906-1

660, Daewangpangyo-ro

Bundang-gu, Seongnam-si

Gyeonggi-do, 463-400

Korea

Phone +82.31.950.7679

Fax +82.504.841.3026

Phone +1.408.883.6310

Fax +1.408.883.6358

Phone +81.3.6895.7410

Fax +81.3.6895.7301

Phone +886.2.2377.8189

Fax +886.2.2377.8199

European Technical Support

Phone +49.351.8822.7.772

Fax +49.351.8822.87.772

DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The

information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer,

licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or

in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any

customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for

any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty,

tort (including negligence), strict liability, or otherwise.

European Sales (Stuttgart)

Phone +49.711.674517.55

Fax +49.711.674517.87955

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

4 of 29

Contents

1 IC Characteristics ............................................................................................................................................. 6

1.1. Absolute Maximum Ratings ....................................................................................................................... 6

1.2. Operating Conditions ................................................................................................................................. 6

1.3. Electrical Parameters ................................................................................................................................ 7

1.3.1. ZSSC5101 Characteristics .................................................................................................................. 7

1.3.2. Input Stage Characteristics ................................................................................................................. 8

1.3.3. Digital Calculation Characteristics ...................................................................................................... 9

1.3.4. Analog Output Stage Characteristics (Digital to VOUT) ................................................................... 10

1.3.5. Analog Input to Analog Output Characteristics (Full Path) ............................................................... 11

1.3.6. Digital Interface Characteristics (CMOS compatible) ....................................................................... 11

1.3.7. Supervision Circuits .......................................................................................................................... 12

1.3.8. Power Loss Circuit ............................................................................................................................ 12

2 Circuit Description .......................................................................................................................................... 13

2.1. Overview .................................................................................................................................................. 13

2.2. Functional Description ............................................................................................................................. 13

2.3. One-Wire Interface and Command Mode (CM) ...................................................................................... 14

2.4. Power-Up/Power-Down Characteristics .................................................................................................. 15

2.5. Power Loss / GND Loss .......................................................................................................................... 15

2.5.1. Purpose ............................................................................................................................................. 15

2.5.2. Power Loss Behavior ........................................................................................................................ 15

2.6. Diagnostics Mode (DM) ........................................................................................................................... 16

3 EEPROM ........................................................................................................................................................ 17

3.1. User Programmable Parameters in EEPROM ........................................................................................ 17

3.2. CRC Algorithm ......................................................................................................................................... 17

3.3. EDC Algorithm ......................................................................................................................................... 17

4 Application Circuit Examples .......................................................................................................................... 18

4.1. Typical Application Circuit for AMR Double Wheatstone Sensor Bridges............................................... 18

4.2. Typical Application Circuit for TMR Sensor Bridges................................................................................ 19

4.3. Mechanical Set-up for Absolute Angle Measurements ........................................................................... 19

4.4. Mechanical Set-up for Linear Distance Measurements .......................................................................... 21

4.5. Input-to-Output Characteristics Calculation Examples ............................................................................ 22

5 ESD and Latch-up Protection ......................................................................................................................... 23

5.1. Human Body Model ................................................................................................................................. 23

5.2. Machine Model ........................................................................................................................................ 23

5.3. Charged Device Model ............................................................................................................................ 23

5.4. Latch-Up .................................................................................................................................................. 23

6 Pin Configuration and Package Dimensions .................................................................................................. 24

6.1. Package Drawing – SSOP-14 ................................................................................................................. 25

6.2. Die Dimensions and Pad Coordinates .................................................................................................... 26

7 Layout Requirements ..................................................................................................................................... 26

8 Reliability and RoHS Conformity .................................................................................................................... 26

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

5 of 29

9 Ordering Information ...................................................................................................................................... 27

10 Related Documents ........................................................................................................................................ 27

11 Glossary ......................................................................................................................................................... 28

12 Document Revision History ............................................................................................................................ 29

List of Figures

Figure 2.1 ZSSC5101 Block Diagram ................................................................................................................ 13

Figure 4.1 ZSSC5101 with AMR Sensor Bridge ................................................................................................ 18

Figure 4.2 ZSSC5101 with TMR Sensor Bridge ................................................................................................ 19

Figure 4.3 Mechanical Set-up for Rotational Measurements and Programming Options ................................. 20

Figure 4.4 Mechanical Set-up for Linear Distance Measurements and Programming Options ........................ 21

Figure 4.5 Input-to-Output Characteristics with Parameters .............................................................................. 22

Figure 6.1 Package Dimensions – SSOP-14 ..................................................................................................... 25

Figure 6.2 Pin Map and Pad Position of the ZSSC5101 SSOP-14 Package .................................................... 26

List of Tables

Table 1.1 Absolute Maximum Ratings ................................................................................................................ 6

Table 1.2 Operating Conditions .......................................................................................................................... 6

Table 1.3 Electrical Characteristics .................................................................................................................... 7

Table 1.4 Input Stage Characteristics ................................................................................................................. 8

Table 1.5 Digital Calculation Characteristics ...................................................................................................... 9

Table 1.6 Analog Output Stage Characteristics ............................................................................................... 10

Table 1.7 Full Analog Path Characteristics....................................................................................................... 11

Table 1.8 Digital Interface Characteristics ........................................................................................................ 11

Table 1.9 Supervision Circuits .......................................................................................................................... 12

Table 1.10 Power Loss Circuit ............................................................................................................................ 12

Table 2.1 Output Modes during Power-Up and Power-Down .......................................................................... 15

Table 2.2 Power Loss Behavior ........................................................................................................................ 15

Table 2.3 Diagnostics Mode ............................................................................................................................. 16

Table 3.1 EEPROM — User Area .................................................................................................................... 17

Table 6.1 Pin Configuration .............................................................................................................................. 24

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

6 of 29

1 IC Characteristics

1.1. Absolute Maximum Ratings

Table 1.1 Absolute Maximum Ratings

Parameter

Symbol

Min

Typ.

Max

Unit

1.1.1.1.

Supply voltage at VDDE pin

VDDE

-0.3

5.7

1.1.1.2.

Voltage at VDDS pin

VDDS

-0.3

VDDE+0.3

1.1.1.3.

Voltage at VSINP, VSINN, VCOSP, and VCOSN pins

-0.3

VDDS

1.1.1.4.

Voltage at VOUT pin

VOUT

-0.3

VDDE+0.3

1.1.1.5.

Storage temperature

-60

160

°C

1.2. Operating Conditions

Table 1.2 Operating Conditions

Note: See important notes at the end of the table.

Parameter

Symbol

Min

Typ.

Max

Unit

1.2.1.1.

Supply voltage for normal operation

VDDE

4.5

5.0

5.7

1.2.1.2.

Operating ambient temperature range, bare die 1)

-40

160

°C

1.2.1.3.

Extended ambient temperature range, bare die 1), 2)

-60

160

°C

1.2.1.4.

Operating ambient temperature range, SSOP-14

-40

150

°C

1.2.1.5.

Temperature range – EEPROM programming

TA-EEP

150

°C

1.2.1.6.

Blocking capacitance between VDDE and VSSE pins

100

1.2.1.7.

Sensor bridge current (sine and cosine)

IBRIDGE

4.0

1.2.1.8.

Capacitive load at outputs

COUT

1.2.1.9.

Output pull-up or pull-down load

RLOAD

k

1.2.1.10.

Angular rate (mechanical)

1000

°/s

1.2.1.11.

EEPROM programming time for a single address

(condition: fDIGITAL is within specification; see 1.3.1.7)

tPROG

1.2.1.12.

Data retention time of memory over lifetime at

maximum average temperature 50°C

tRET

years

1.2.1.13.

EEPROM endurance

200

cycles

1.2.1.14.

Range of differential input voltage

(range of differential sensor output signal)

VIN-RANGE

±23

mV/V

1.2.1.15.

Range of offset voltage at input that can be digitally

compensated

VOFFSET-COMP

-4

mV/V

1.2.1.16.

Range of offset temperature compensation at input

that can be digitally compensated

TCOEFF-RANGE

-4

(µV/V)/K

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

7 of 29

Parameter

Symbol

Min

Typ.

Max

Unit

1.2.1.17.

Common mode input voltage range

CMR

30%

70%

VDDE

1.2.1.18.

Waiting time after enabling EEPROM charge pump

clock

tVPP-RISE

1) RTHJA = 160 K/W assumed.

2) With reduced performance.

1.3. Electrical Parameters

The following electrical specifications are valid for the operating conditions as specified in table 1.2

(TA = -40°C to 160°C).

1.3.1. ZSSC5101 Characteristics

Table 1.3 Electrical Characteristics

Parameter

Symbol

Min

Typ.

Max

Unit

1.3.1.1.

Leakage current at VSINP, VSINN, VCOSP, and

VCOSN pins

IIN-LEAK

µA

1.3.1.2.

Leakage current at VOUT in high-impedance state

IOUT-LEAK

-12

+12

µA

1.3.1.3.

Leakage current difference Vsinp/n, Vcosp/n 1)

IIN-DIFF-LEAK

1.3.1.4.

Current consumption

ISUPPLY

1.3.1.5.

Peak current consumption at startup 1) 2)

IPEAK

1.3.1.6.

Sensor supply voltage

VDDS

3.8

4.2

1.3.1.7.

Internal digital master clock frequency

(after calibration)

fDIGITAL

1.5

1.6

1.8

MHz

1) Maximum characterized on samples, not measured in production.

2) ZSSC5101 can start with such a peak current for ramps of the power supply with a rise-up time > 100 µs.

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

8 of 29

1.3.2. Input Stage Characteristics

Table 1.4 Input Stage Characteristics

Parameter

Symbol

Conditions

Min

Typ.

Max

Unit

1.3.2.1.

Common mode

rejection ratio

CMRR

Input frequency < 100Hz

1.3.2.2.

Input preamp offset

voltage drift

TCVD-IN-OFFSET

With chopped amplifier

µV/K

1.3.2.3.

Input stage offset

INPOFFSET

Referenced to ADCaverage

±32

LSBADC

1.3.2.4.

Input differential

nonlinearity

DNLADC

±2 LSB at 12-bit ADC

(guaranteed monotony) 1)

±500

ppm

1.3.2.5.

Input integral

nonlinearity

INLINPUT

Half input range

±2 LSB at 12-bit ADC

±500

ppm

1.3.2.6.

Output referred noise

Full range input

Referenced to ADC steps

after average (16-bit

ADCaverageSin register) 1)

LSB eff

1.3.2.7.

Gain low

(programmable)

17.8

18.2

1.3.2.8.

Gain high

(programmable)

35.6

36.4

1.3.2.9.

Gain matching between

high and low gain

0.6

1.3.2.10.

Input noise voltage

density

At bandwidth < 5kHz

100

nV/sqrt(Hz)

1) Refer to the ZSSC5101 Application Note – Programming.

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

9 of 29

1.3.3. Digital Calculation Characteristics

Table 1.5 Digital Calculation Characteristics

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.3.1.

Input stage resolution

RESINPUT

bit

1.3.3.2.

Resolution at offset

measurement

RESOFFSET

bit

1.3.3.3.

CORDIC calculation

length

bit

1.3.3.4.

CORDIC accuracy for

angle value

bit

1.3.3.5.

CORDIC accuracy for

magnitude value

bit

1.3.3.6.

Channel switching

frequency (i.e., the

ADC conversion time)

fADC

1/16

fDIGITAL

With average16not8 bit field

in eep_ctrl_manu register 1)

set to ‘0’

1/32

fDIGITAL

1.3.3.7.

Update rate of VOUT

fUPDATE

3.125

kHz

1.3.3.8.

Channel time skew

between sampling of sine

and cosine channels

tSKEW

1/fADC

1.3.3.9.

Digitally programmable

output angular range

aMAX

AMR sensors

180

° mech

GMR, TMR

360

° mech

1.3.3.10.

Angular resolution

AMR sensors

Vout = 5 to 95% VDDE

0.022

0.04

° mech

GMR, TMR

Vout = 5 to 95% VDDE

0.044

0.08

° mech

1.3.3.11.

Zero point adjustment

range

(digitally programmable)

AMR sensors

180

° mech

GMR, TMR

360

° mech

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

10 of 29

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.3.12.

Upper output clamping

level

VCLAMP-HIGH

Max. digital DAC value

4864, fixed resolution (see

RESCLAMP below)

%VDDE

1.3.3.13.

Lower output clamping

level

VCLAMP-LOW

Min. digital DAC value 256,

fixed resolution

(see RESCLAMP)

30.5

%VDDE

1.3.3.14.

Resolution of clamping

levels

(digitally programmable)

RESCLAMP

1 / 5120

(1/4608

of output

range)

VDDE

1.3.3.15.

DAC resolution

RESDAC

1 / 5120

(0.02% of

VDDE)

VDDE

1) Refer to the ZSSC5101 Application Note – Programming.

1.3.4. Analog Output Stage Characteristics (Digital to VOUT)

Table 1.6 Analog Output Stage Characteristics

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.4.1.

Output voltage range

VOUT

At full supply working range

4.5 V < VDDE < 5.7 V

%VDDE

1.3.4.2.

Error of upper and lower

clamping level 1)

-0.18

0.18

%VDDE

1.3.4.3.

Output offset

Chopped output

±5

LSBDAC

1.3.4.4.

Differential nonlinearity of

DAC

DNLDAC

Guaranteed monotony

±2

LSBDAC

1.3.4.5.

Integral nonlinearity of DAC

INLDAC

±3.9

LSBDAC

1.3.4.6.

Output current

IOUT

Analog output in Normal

Operating Mode

1.3.4.7.

Output current limit 2)

IOUT-LIMIT

Analog output

1) Can be digitally compensated during calibration.

2) Overwrite-able for entering the Command Mode. See section 2.3.

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

11 of 29

1.3.5. Analog Input to Analog Output Characteristics (Full Path)

Table 1.7 Full Analog Path Characteristics

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.5.1.

Output voltage

temperature drift

VOUT-TEMP-DRIFT

For full angular range

including complete function

1.6

1.3.5.2.

Overall linearity

error

INLALL

Full mechanical input range 1)

5% to 95% VDDE output

range

8.2 LSB of DAC, orthogonal

analog input to analog output

±0.18

% VDDE

1.3.5.3.

Output voltage noise

VNOISE-OUT

With external low pass filter

fC = 0.7kHz

1.3

mVeff

1.3.5.4.

Propagation delay

time to 90% output

level change

tPROP-DELAY

45°mech step for AMR,

90°mech step for GMR;TMR

1.8

1.3.5.5.

Power-on time

tON

Time until first valid data on

VOUT after

VDDE > VPW-ON (see

specification 1.3.7.2)

256

1/fDIGITAL

1) Corresponds to 180° mechanical range for AMR sensors or 360° for GMR, TMR sensors.

1.3.6. Digital Interface Characteristics (CMOS compatible)

Table 1.8 gives the digital signal levels during one-wire interface (OWI) communication.

Table 1.8 Digital Interface Characteristics

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.6.1.

Input HIGH level

VIN-HIGH

75%

VDDE

1.3.6.2.

Input LOW level

VIN-LOW

25%

VDDE

1.3.6.3.

Output HIGH level

VOUT-HIGH

IOUT-HIGH = 2mA

90%

VDDE

1.3.6.4.

Output LOW level

VOUT-LOW

IOUT-LOW = 2mA

10%

VDDE

1.3.6.5.

Switching level

VSWITCH

50%

VDDE

1.3.6.6.

Hysteresis of Schmitt-triggers

on VOUT pin

VOUT-ST-HYST

Centered around VSWITCH

%VDDE

ZSSC5101

xMR Sensor Signal Conditioner

Data Sheet

April 17, 2015

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

12 of 29

1.3.7. Supervision Circuits

See section 2.4 for details for specifications in Table 1.9 that are related to power-up/power-down characteristics.

Table 1.9 Supervision Circuits

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.7.1.

Time to enter Command

Mode 1)

tCODE

Start-up sequence

1.3.7.2.

Power watch on-level 2)

VPW-ON

4.05

4.30

4.45

1.3.7.3.

Power watch off-level 3)

VPW-OFF

3.9

4.2

4.3

1.3.7.4.

Hysteresis on/off

VHYST

VHYST =

VPW-ON – VPW-OFF

100

350

1.3.7.5.

Power-on level 4)

VON

2.4

2.7

3.3

1.3.7.6.

Lower diagnostic range

VDIAG-LOW

Fixed as DAC value 96

VDDE (min)

1.3.7.7.

Upper diagnostic range

VDIAG-HIGH

Fixed as DAC value

5024

96%

VDDE (min)

1) After power-on, device checks for correct signature until tCODE expires.

2) If VDDE is above this level, VOUT is on in Normal Operating Mode.

3) If VDDE is below this level, VOUT is set to the defined Diagnostics Mode.

4) If VDDE is equal to or below this level, VOUT is in reset state or diagnostics LOW state (see Table 2.1).

1.3.8. Power Loss Circuit

Table 1.10 Power Loss Circuit

Parameter

Symbol

Condition

Min

Typ.

Max

Unit

1.3.8.1.

Output impedance at VOUT

for power loss

RP-LOSS

VDDE – VSSE < 0.7V

Corresponds to

diagnostics range for

pull-up/pull-down ≥ 5kΩ

200

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xMR Sensor Signal Conditioner

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13 of 29

2 Circuit Description

2.1. Overview

The ZSSC5101 is a sensor signal conditioner and encoder for magnetoresistive sensor bridges. In a typical set-

up for rotational or linear motion, the sensor bridges provide two sinusoidal signals, which are phase-shifted by

90° (Vsin and Vcos). The ZSSC5101 converts these two signals into a linear voltage ramp, proportional to the

rotation angle or linear distance by means of a CORDIC (COordinate Rotation DIgital Computer) algorithm.

The output voltage VOUT (see specification 1.3.4.1) is ratiometric to VDDE; the typical supply voltage is 5V ±10%.

Using the ZSSC5101’s one-wire interface (OWI), a sensor assembly containing an xMR sensor bridge and the

ZSSC5101 can be connected to a host controller by means of just three wires:

 VDDE (4.5 to 5.5V)

 VOUT (sensor output and programming input)

 VSSE (ground)

The VOUT pin is used for sensor output, programming, and diagnostics for the ZSSC5101 through the OWI (see

section 2.3). All parameters are stored in a nonvolatile memory (EEPROM) and can be read and re-programmed

by the user.

By using the output pin for programming, no additional wires are required to calibrate the sensor. This facilitates

in-line programming and re-programming of fully assembled sensor modules.

The ZSSC5101 also provides failure mode detection, such as broken supply or broken ground detection. In

Normal Operating Mode, the output voltage ranges from ≥5% VDDE to ≤95% VDDE. Both clamping levels are

programmable (see specifications 1.3.3.12 and 1.3.3.13).

In the case of failure detection, the output voltage will be outside the normal operating range (<4%VDDE and

>96%VDDE).

2.2. Functional Description

Figure 2.1 provides the block diagram for the ZSSC5101. See section 11 for the definitions of the abbreviations.

Figure 2.1 ZSSC5101 Block Diagram

Interface

Power Supply Regulators EEPROM

Cordic

Algorithm

One-Wire

Interface

DAC Buffer

Amp.

Analog Frontend AFE

MUX PGA ADC

Sin

Cos

VDDS

VSSS

VSINP

VDDS

VSSS

VDDS

VSSS

Digital Signal Processing and Control

VSINN

VCOSP

VCOSN

VDDE

VSSE

VOUT

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14 of 29

The ZSSC5101 is supplied by a single supply voltage VDDE of 5V ±10%. Internal low-dropout linear voltage

regulators (LDOs) generate the required analog and digital supply voltages as well as the supply voltage for the

sensor bridge, VDDS.

The ZSSC5101 accepts fully differential signals from both sine and cosine sensor bridges. These signals are

connected to the VSINP, VSINN pins and the VCOSP, VCOSN pins, respectively.

Both sine and cosine signals are then multiplexed, sequentially pre-amplified, and sampled by a 12-bit ADC. The

xMR COS/SIN-bridge circuitry is alternately sampled at a frequency of ~200kHz to ensure an identical signal

conversion in both sine and cosine paths.

Following data conversion, the digital sine and cosine values representing X and Y rectangular coordinates are

converted into their respective polar coordinates, phase, and magnitude by means of coordinate transformation

using a CORDIC algorithm.

Phase information ranges from 0 to 2π, which is equivalent to one full wave of the input signal. This information

is further used to calculate the analog output voltage, depending on the user-programmable settings, such as

zero position or angle range. See section 4.3 for further details.

The magnitude information is equivalent to the strength of the input signal (Vpeak). This information is further

used to determine a “magnet loss” error state. See section 2.6 for further details.

Based on the calculated phase information and the user-programmed zero, slope, and clamping parameters, the

corresponding output values are calculated and routed to the DAC input. The DAC output is driven by a buffer

amplifier and routed to the output pin VOUT.

2.3. One-Wire Interface and Command Mode (CM)

In Normal Operating Mode (NOM), the VOUT pin is a buffered, analog output, providing an output voltage

equivalent to the sensor input signals.

Because the same pin is used for programming via the OWI, a specific sequence is required to put the ZSSC5101

into command / programming mode (CM):

 After power-on, the circuit starts in NOM and provides a valid output signal after t_on.

 In parallel, the ZSSC5101 monitors the VOUT pin for a valid signature command from the programming

system to enable the Command Mode (authorization). Therefore, the programming system must be able to

overdrive the output buffer with a driver strength greater than IOUT-LIMIT (see 1.3.4.7).

 The ZSSC5101 can only be unlocked by receiving a predefined user-programmable signature. This

signature is stored in the EEPROM in a write-only register.

 If CM is active, the output buffer is switched to high impedance and communication over the one-wire

interface is enabled.

 The time frame to enter CM with a valid signature command is limited to tCODE, but it is always open in

Diagnostics Mode (see section 2.6).

 Digital data transmission over the one-wire-interface bus is accomplished using PWM-coded signals. For

further information on the OWI protocol, please contact ZMDI technical support (see contact information on

page 29).

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xMR Sensor Signal Conditioner

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2.4. Power-Up/Power-Down Characteristics

Table 2.1 describes the behavior of the ZSSC5101 during ramp-up and ramp-down of the power supply voltage

VDDE. See Table 1.7 and Table 1.9 for the timing and voltage specifications. In each condition, the ZSSC5101 is in

a defined state, which is a substantial feature for safety-critical applications.

Table 2.1 Output Modes during Power-Up and Power-Down

VDDE Voltage

Range [V]

Description

Behavior at VOUT

0.0 to 1.5

The ZSSC5101 is in reset state.

Active driven output to a voltage level

between 0 and VDDE/2

1.5 to 2.5

VOUT is driven to LOW state.

Diagnostics LOW level

2.5 to 4.2

If VDDE > VON, the power-on reset is released and all modules

are activated.

Diagnostics Mode (see section 2.6)

4.2 to 4.5

If VDDE> VPW-ON, VOUT is turned on after tON and drives the

last calculated angle value from the DAC. If VDDE < VPW-OFF,

the ZSSC5101 enters Diagnostics Mode; however, brief

voltage drops are ignored.

Analog output with reduced accuracy

4.5 to 5.7

Normal operation range.

Normal Operation Mode

Analog output with specified accuracy

2.5. Power Loss / GND Loss

2.5.1. Purpose

In NOM, the output voltage of the ZSSC5101 is within the range of 5%VDDE ≤ VOUT ≤ 95% VDDE.

In the event of a loss of VDDE or VSSE, for example due to a broken supply wire, the output voltage VOUT will

be driven into the diagnostics range, which is a voltage level outside of the normal operating range. This makes a

power loss easily identifiable by the host controller.

The diagnostic levels are defined as

 Diagnostics LOW level: VOUT <= 4% VDDE; see specification 1.3.7.6

 Diagnostics HIGH level: VOUT >= 96% VDDE; see specification 1.3.7.7

2.5.2. Power Loss Behavior

In order to ensure that the output can be safely driven to the Diagnostics Mode levels, a pull-up or pull-down

resistor ≥ 5k must be connected at the receiving side of the VOUT signal.

Table 2.2 Power Loss Behavior

External Resistor

VDDE Loss

VSSE Loss

Pull-Up ≥ 5k

Diagnostics LOW level

Diagnostics HIGH level

Pull-Down ≥ 5k

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2.6. Diagnostics Mode (DM)

In addition to the power loss indication described above, the ZSSC5101 also indicates other error states by

switching the output VOUT into Diagnostics Mode. These errors are described in Table 2.3.

Table 2.3 Diagnostics Mode

Error Source

Error Condition

Error De-activation

Loss of input signal

Loss of magnet; magnitude is below a

pre-programmed threshold

Magnitude must be above the threshold;

power-on reset

EEPROM

CRC error

Power-on reset

EEPROM

EEPROM read failure

Power-on reset

DAC

No valid DAC values

Valid DAC values are available

Supply voltage

Low VDDE; VDDE < VPW-OFF;

see specification 1.3.7.3

VDDE > VPW-ON; see specification 1.3.7.2

The state of the Diagnostics Mode is programmable in the EEPROM, it has the following options:

 Diagnostics LOW level

 Diagnostics HIGH level

 High impedance (in this setting, external pull-up or pull-down resistors must be connected to VOUT)

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3 EEPROM

The ZSSC5101 contains a non-volatile EEPROM memory for storing manufacturer codes and calibration values

as well as user-programmable data. Access to the EEPROM is available over the output pin VOUT by using

ZMDI’s one-wire interface (see section 2.3).

3.1. User Programmable Parameters in EEPROM

Table 3.1 shows the user accessible settings of the EEPROM. These settings are used to adjust the analog

output VOUT to the mechanical movement range and provide space for a user-selectable identification number.

Table 3.1 EEPROM — User Area

Function

Description

Zero angle

Mechanical zero position

Magnet loss

Threshold that defines when the magnet loss error diagnostic state is turned on/off

Angular range slope

Multiplication factor for determining the slope of the analog output

Clamp low and high

Upper and lower clamping levels when the mechanical angle is at the minimum, maximum, or

outside of the normal operation range

User ID

32-bit user-selectable identification number

Clamp switch angle

Angle position at which the output changes the clamping level state

Slope direction

Rising or falling slope of output voltage vs. rotation; clockwise or counterclockwise operation

PGA gain

Input preamplifier gain: low/high

Diagnostics Mode

VOUT state in Diagnostics Mode: LOW, HIGH, or high impedance

For detailed information about EEPROM programming and register settings, refer to the ZSSC5101 Application

Note – Programming.

3.2. CRC Algorithm

EEPROM data is verified by implementing an 8-bit cyclic redundancy check (CRC).

3.3. EDC Algorithm

The EEPROM is protected against bit errors through an error detection and correction (EDC) algorithm. The

protection logic corrects any single-bit error in a data word and can detect all double-bit errors. A single-bit error is

corrected, and the ZSSC5101 continues in Normal Operating Mode. On detection of a double-bit error, the

ZSSC5101 enters the Diagnostics Mode.

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xMR Sensor Signal Conditioner

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4 Application Circuit Examples

4.1. Typical Application Circuit for AMR Double Wheatstone Sensor Bridges

Figure 4.1 ZSSC5101 with AMR Sensor Bridge

ZSSC5101

VSINP

VSINN

VCOSP

VCOSN

VDDE

VSSE

Load

Circuit

VDDS

VSSS

VOUT Rout

+5V

AMR Sensor Bridge

e.g. Sensitec AA747

Cout

100nF

GND

VCC

+VO2

-VO2

+VO1

-VO1

The circuit diagram in Figure 4.1 shows a typical application for the ZSSC5101 with an AMR double Wheatstone

sensor bridge. Due to the nature of AMR sensors, the periodicity of these sensor signals is 180 mechanical

degrees.

The sensor bridges are mechanically rotated by 45° from each other, providing differential output signals that are

90 electrical degrees apart. The ZSSC5101 converts these sine and cosine signals into a linear output voltage

with a programmable full-scale angle range from 0° to 5° up to 0° to 180° with a resolution of 0.022° to 0.04° per

step (see specification 1.3.3.10). The ZSSC5101 accepts sensor signals with a sensitivity up to ±23mV/V (see

specification 1.2.1.14), which is sufficient for a typical AMR sensor bridge. No external components are required

at the sensor inputs.

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4.2. Typical Application Circuit for TMR Sensor Bridges

Figure 4.2 ZSSC5101 with TMR Sensor Bridge

ZSSC5101

VSINP

VSINN

VCOSP

VCOSN

VDDE

VSSE

Load

Circuit

VDDS

VSSS

VOUT Rout

+5V

TMR Sensor Bridge

e.g. MDT MMA253F

Cout

100nF

GND

VCC

X+

X-

Y+

Y- Rs=51k

Rp = 5k to 10k

The circuit diagram in Figure 4.2 shows a typical application for the ZSSC5101 with two TMR sensor bridges.

TMR and GMR sensors have a periodicity of 360 mechanical degrees; therefore this configuration can be used to

measure the absolute angle of a full mechanical turn.

The sensor bridges are mechanically rotated by 90° from each other, providing differential output signals that are

90 electrical degrees apart. The ZSSC5101 converts these sine and cosine signals into a linear output voltage

with a programmable full-scale angle range from 0° to 10° up to 0° to 360° with a resolution of 0.044° to 0.08° per

step (see specification 1.3.3.10). As a TMR sensor bridge has a much higher sensitivity than an AMR Sensor (up

to 2 orders of magnitude), a resistive divider consisting of 2x Rs and Rp is added to each sensor input channel

(sin, cos) of the ZSSC5101 to match the sensor bridge with the ZSSC5101 inputs.

For best temperature compensation, Rs and Rp should have the same temperature coefficient TC and routed

close together on the same printed circuit board (PCB).

4.3. Mechanical Set-up for Absolute Angle Measurements

Figure 4.3 shows a typical set-up for an absolute rotation angle measurement. A diametrically magnetized magnet

is mounted at the end of a rotating shaft with a specific gap. The rotation axis of the magnet is centered over the

xMR sensor (see sensor manufacturer’s data sheet for exact location). Depending on the maximum angle to be

measured, the sensor can be either an AMR sensor with a maximum absolute angle of 180° or a TMR/GMR

sensor with a maximum absolute angle of 360° (see 4.1 and 4.2 for further details).

The ZSSC5101 converts the sine and cosine signals generated by the xMR sensor bridge into a linear ramp that

is proportional to the rotation angle.

The gap between magnet and sensor is determined by the strength of the magnet and the type of sensor.

Stronger magnets allow larger air gaps, and due to their higher sensitivity, TMR sensors allow larger air gaps than

AMR sensors. The air gap should be chosen such that the sensor output signal remains undistorted and

sinusoidal.

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In order to adjust the linear ramp to the mechanical angle range, the ZSSC5101 provides several programmable

parameters. These parameters are stored in an on-chip EEPROM and can be re-programmed by the user (see

Figure 4.3):

 Zero angle position: aligns the mechanical zero position to the electrical zero position

 Maximum angle position: matches the full stroke of the ramp to the mechanical angular range

 Clamp switch angle: defines the angle position where the output voltage returns from Vout,max to Vout,min

 Maximum output voltage, upper clamping level Vout,max

 Minimum output voltage, lower clamping level Vout,min

 Ramp direction: rising or falling ramp

Figure 4.3 Mechanical Set-up for Rotational Measurements and Programming Options

Ferrite or

rare earth magnet

xMR sensor ZSSC5101

Vout

0 180 360° angle

Vout

95%

0° 180° 360°

angle

Vout

95%

+5V

2 3

Full turn operation (TMR)

Adjustable angle range and clamp

levels

= programmable options

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xMR Sensor Signal Conditioner

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4.4. Mechanical Set-up for Linear Distance Measurements

Figure 4.4 shows a typical set-up for a linear distance measurement. The xMR sensor provides a sinusoidal

signal that is proportional to the length of a magnetic pole (AMR) or to the length of a magnetic pole pair (TMR).

The graph shown below shows a setup for an AMR sensor (e.g., Sensitec AA700 family; www.sensitec.com,

Measurement Specialties KMT series, www.meas-spec.com).

As the magnet is moving on a linear path, one output ramp is generated with each pole; hence an absolute linear

distance measurement is possible within the length of one pole:

min,max,

min,

*_ outout

outout

PVV VV

Lpositionabsolute 





where: LP = pole length of the sensor magnet

VOUT = output voltage of the ZSSC5101

VOUT,max = maximum output clamping voltage of ZSSC5101 ( programmable; e.g. 95% VDD)

VOUT,min = minimum output clamping voltage of ZSSC5101 ( programmable; e.g. 5% VDD)

Longer linear distances can be measured by using multi-pole magnetic strips and by counting the number of

ramps from a defined home position. Each full ramp (VOUT,min to VOUT,max) corresponds to the length of one

magnetic pole.

Figure 4.4 Mechanical Set-up for Linear Distance Measurements and Programming Options

Dipole or

multi-pole magnet

xMR sensor ZSSC5101

Vout

0 1LP 2 LP distance

Vout

95%

+5V

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4.5. Input-to-Output Characteristics Calculation Examples

Figure 4.5 shows a detailed view of the possible settings for clamping levels, zero position, ramp slope, and

clamp switch angle.

The total output range VOUT from 0 to 100% VDDE is 5120 DAC steps.

In the normal operating range (5 to 95% VDDE), the DAC output can range from 256 to 4864, allowing 4608 steps

(12.17bit) for the analog output voltage.

The full-scale angular range is 180° for AMR sensors and 360° for GMR and TMR sensors. Consequently, the

full-scale angular step resolution is

180°/4608 = 0.039 mechanical degrees for AMR sensors and

360°/4608 = 0.078 mechanical degrees for GMR and TMR sensors

Smaller angular ranges result in a finer angular step resolution. The smallest angle step is 0.022° (= 180°/8192).

For example, a total stroke of 30° (e.g., in a pedal application) will yield the following results:

30°/0.022° = 1365 steps (using an AMR sensor)

Figure 4.5 Input-to-Output Characteristics with Parameters

Output voltage (%Vdd)

95%

180°

(360°)

Range VCLAMP-HIGH

Range VCLAMP-LOW

100%

DAC value

4608

256 256

5120

1306 2816

zero_angle

30.5%

40%

0°

1562

2048

clamp_switch_angle

5120

4864

256

VCLAMP-HIGH

VCLAMP-LOW

angular_range mechanical

angle

Ouput voltage (%VDDE)

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xMR Sensor Signal Conditioner

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23 of 29

5 ESD and Latch-up Protection

5.1. Human Body Model

The ZSSC5101 conforms to standard MIL-STD-883D Method 3015.7, rated at 4000V, 100pF, 1.5kΩ according to

the Human Body Model. This protection is ensured at all external pins (VOUT) including the device supply

(VDDE, VSSE). ESD protection on all other pins (VDDS, VSSS, VSINP, VSINN, VCOSP, VCOSN) is up to

2000V.

5.2. Machine Model

The ZSSC5101 conforms to standard EIA/JESD22-A115-A, rated at 400V, 200pF, and 0kΩ according to the

machine model. This protection is ensured at all external pins (VOUT) including device supply (VDDE, VSSE).

ESD protection on all other pins (VDDS, VSSS, VSINP, VSINN, VCOSP, VCOSN) is up to 200V.

5.3. Charged Device Model

The ZSSC5101 conforms to standard AEC Q100 (Rev. F) and EIA/JESD22/C101, rated at 750V for corner pins

and 500V for all other pins (class C3B) according to the Charge Device Model. This protection is ensured at all

external pins,

5.4. Latch-Up

The ZSSC5101 conforms to EIA/JEDEC Standard No. 78.

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xMR Sensor Signal Conditioner

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6 Pin Configuration and Package Dimensions

The ZSSC5101 is available in a SSOP14 green package or as bare die.

Table 6.1 Pin Configuration

Pin No

Die

Pin No

SSOP-14

Name

Description

Notes

VDDE

Positive analog supply voltage

Positive supply voltage, 5V ±10%

VSSE

Negative analog supply voltage

Negative supply voltage, must connect to GND

VOUT

Analog output/one-wire interface (OWI)

VDDS

Positive sensor supply voltage

VCOSP

Positive sensor signal cosine channel

input

VSINP

Positive sensor signal sine channel

input

VSSS

Negative sensor supply voltage

VSINN

Negative sensor signal sine channel

input

VCOSN

Negative sensor signal cosine channel

input

N.C.

Unconnected pin

Must be left open

TEST

Factory test pin

Must be left open

N.C.

Unconnected pin

Must be left open

N.C.

Unconnected pin

Must be left open

TEST

Factory test pin

Must be left open

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6.1. Package Drawing – SSOP-14

The SSOP-14 package is a delivery option for the ZSSC5101. The package dimensions based on the JEDEC

JEP95: MO-150 standard illustrated in Figure 6.1.

Figure 6.1 Package Dimensions – SSOP-14

Dimension

Minimum

Maximum

1.73

1.99

0.05

0.21

1.68

1.78

0.25

0.38

0.09

0.20

D *

6.07

6.33

0.65 nominal

E *

5.20

5.38

7.65

7.90

0.25

0.63



0°

10°

* Without mold-flash

Weight 0.3g

Package Body Material Low stress epoxy

Lead Material FeNi-alloy or Cu-alloy

Lead Finish Solder plating

Lead Form Z-bends

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xMR Sensor Signal Conditioner

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Figure 6.2 Pin Map and Pad Position of the ZSSC5101 SSOP-14 Package

Package SSOP-14

Package marking codes:

vv Version code

yymm Manufacturing date:

yy = last two digits of year

mm = two digits for month

R indicates RoHS compliance

ZSSC

5101 vv

yymm R

VSINN

VSSS

VCOSN

VDDE

VSSE

VDDS

VSINP

VCOSP

VOUT

N.C.

TEST

N.C.

6.2. Die Dimensions and Pad Coordinates

Die dimensions and pad coordinates are available on request in a separate document. See section 10.

7 Layout Requirements

Recommendation: Keep the traces between the xMR sensor and the ZSSC5101 (VDDS, VSSS, VSINP, VSINN,

VCOSP, and VCOSN pins) as short as possible. Additional resistors for using TMR sensors (see Figure 4.2)

should have the same temperature coefficient TC and be routed close together on the same PCB.

8 Reliability and RoHS Conformity

The ZSSC5101 is qualified according to the AEC-Q100 standard, operating temperature grade 0.

The ZSSC5101 complies with the RoHS directive and does not contain hazardous substances.

The complete RoHS declaration update can be downloaded at www.zmdi.com/quality.

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xMR Sensor Signal Conditioner

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9 Ordering Information

Sales Code

Description

Delivery Package

ZSSC5101BE1B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 390 ±15µm

ZSSC5101BE2B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 725 ±15µm

ZSSC5101BE3B

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, unsawn, thickness = 250 ±15µm

ZSSC5101BE1C

ZSSC5101 Die – Temperature range: -40°C to +160°C

8” tested wafer, sawn on frame, thickness = 390 ±15µm

ZSSC5101BE4R

ZSSC5101 SSOP-14 – Temperature range: -40°C to +150°C

13” tape and reel

ZSSC5101BE4T

ZSSC5101 SSOP-14 – Temperature range: -40°C to +150°C

Tube

ZSSC5101 KIT

ZSSC5101 Evaluation Kit including USB Communication Board, ZSSC5101 AMR board, adapters. Software can be

downloaded from www.zmdi.com/zssc5101 after free customer login, which is described in section 10 (see the

ZSSC5101 Evaluation Kit and GUI Description for details).

10 Related Documents

Note: RevX_xy refers to the current version of the document.

Document

File Name

ZSSC5101 Feature Sheet

ZSSC5101_Feature_Sheet_RevX_xy.pdf

ZSSC5101 Evaluation Kit and GUI Description *

ZSSC5101_Eval_Kit+GUI_Description_RevX_xy.pdf

ZSSC5101 Technical Note – Die Dimensions **

ZSSC5101_TN_Die_Dimensions_RevX_xy.pdf

ZSSC5101 Application Note – Programming **

ZSSC5101_AN_Programming_RevX_xy.pdf

Visit the ZSSC5101 product page www.zmdi.com/zssc5101 on ZMDI’s website www.zmdi.com or contact your

local sales office for the latest version of these documents.

* Note: Documents marked with an asterisk (*) require a free customer login account. To set up an account, click on Login

in the upper right corner of the website at www.zmdi.com and follow the instructions.

** Note: Documents marked with two asterisks (**) are available only on request. See contact information on page 29.

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xMR Sensor Signal Conditioner

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28 of 29

11 Glossary

Term

Description

AFE

Analog Frontend

AMR

Anisotropic Magnetoresistance

Command Mode

CORDIC

Coordinate Rotation Digital Computer

DAC

Digital-to-Analog Converter

Diagnostic Mode

EDC

Error Detection and Correction

GMR

Giant Magnetoresistance

INL

Integral Nonlinearity

LDO

Low-Dropout Linear Voltage Regulators

MUX

Multiplexer

NOM

Normal Operating Mode

OWI

One-Wire Interface

PCB

Printed Circuit Board

THJA

Junction to Ambient Thermal Resistance

TMR

Tunnel Magnetoresistance

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12 Document Revision History

Revision

Date

Description

1.00

August 25, 2014

First release document

1.10

September 10, 2014

Add package drawing

1.20

April 13, 2015

Updates for INLDAC, TMR application schematic, pin names.

Addition of package marking codes in Figure 6.2.

Removal of references to half-bridge applications.

Corrections for step number in section 4.5 and Figure 4.5.

Update for contact information.

Minor edits for clarity.

1.21

April 17, 2015

Correction for maximum temperature for SSOP-14.