±0.5°C Accurate, 10-Bit Digital
Temperature Sensors in SOT-23
AD7414/AD7415
Rev. E
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FEATURES
10-bit temperature-to-digital converter
Temperature range: −40°C to +125°C
Typical accuracy of ±0.5°C at +40°C
SMBus/I2C®-compatible serial interface
3 µA power-down current
Temperature conversion time: 29 µs typ
Space-saving 6-lead (AD7414) and 5-lead (AD7415)
SOT-23 packages
Pin selectable addressing via AS
Overtemperature indicator (AD7414 Only)
SMBus alert function (AD7414 only)
4 versions allow 8 I2C addresses (AD7414)
2 versions allow 6 I2C addresses (AD7415)
APPLICATIONS
Hard disk drives
Personal computers
Electronic test equipment
Office equipment
Domestic appliances
Process control
Cellular phones
GENERAL DESCRIPTION
The AD7414/AD7415 are complete temperature monitoring
systems in 6-lead and 5-lead SOT-23 packages. They contain a
band gap temperature sensor and a 10-bit ADC to monitor and
digitize the temperature reading to a resolution of 0.25°C.
The AD7414/AD7415 provide a 2-wire serial interface that is
compatible with SMBus and I2C interfaces. The parts come in four
versions: the AD7414/AD7415-0, AD7414/AD7415-1, AD7414-2,
and AD7414-3. The AD7414/AD7415-0 and AD7414/AD7415-1
versions provide a choice of three different SMBus addresses for
each version. All four AD7414 versions give the possibility of eight
different I2C addresses while the two AD7415 versions allow up to
six I2C addresses to be used.
The AD7414/AD7415’s 2.7 V supply voltage, low supply current,
serial interface, and small package size make them ideal for a
variety of applications, including personal computers, office
equipment, cellular phones, and domestic appliances.
In the AD7414, on-chip registers can be programmed with high
and low temperature limits, and an open-drain overtemperature
indicator output (ALERT) becomes active when a programmed
FUNCTIONAL BLOCK DIAGRAM
SDA
SCL
VDD
SMBus/I2C
INTERFACE
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
CONFIGURATION
REGISTER
TEMPERATURE
VALUE
REGISTER
AD7415
AS
GND
AS
GND
SDA
SCL
TLOW SETPOINT
REGISTER SETPOINT
COMPARATOR ALERT
VDD
AD7414
SMBus/I2C
INTERFACE
10-BIT
ANALOG-DIGITAL
CONVERTER
BAND GAP
TEMPERATURE
SENSOR
CONFIGURATION
REGISTER TEMPERATURE
VALUE
REGISTER
THIGH SETPOINT
REGISTER
02463-001
Figure 1.
limit is exceeded. A configuration register allows programming of
the state of the ALERT output (active high or active low). This
output can be used as an interrupt or as an SMBus alert.
PRODUCT HIGHLIGHTS
1. On-chip temperature sensor. The sensor allows an accurate
measurement of the ambient temperature to be made. It is
capable of ±0.5°C temperature accuracy.
2. SMBus/I2C-compatible serial interface. The interface offers pin
selectable choice of three addresses per version of the
AD7414/AD7415, eight address options in total for the AD7414,
and six in total for the AD7415.
3. Supply voltage of 2.7 V to 5.5 V.
4. Space-saving 5-lead and 6-lead SOT-23 packages.
5. 10-bit temperature reading to 0.25°C resolution.
6. Overtemperature indicator. This indicator can be software
disabled. It is used as an interrupt of SMBus alert.
7. One-shot and automatic temperature conversion rates.
AD7414/AD7415
Rev. E | Page 2 of 20
TABLE OF CONTENTS
Specifications .....................................................................................3
Absolute Maximum Ratings ............................................................5
ESD Caution ..................................................................................5
Pin Configurations and Function Descriptions............................6
Theory of Operation.........................................................................7
Circuit Information ......................................................................7
Functional Description.................................................................7
Measurement Technique..............................................................7
Temperature Data Format............................................................8
Internal Register Structure...............................................................9
Address Pointer Register..............................................................9
Configuration Register (Address 0X01) .....................................9
Temperature Value Register (Address 0X00)...........................10
AD7414 THIGH Register (Address 0X02) ...................................10
AD7414 TLOW Register (Address 0X03) ....................................10
Serial Interface.................................................................................12
Serial Bus Address.......................................................................12
Write Mo de ..................................................................................12
Read Mode...................................................................................12
SMBUS ALERT ............................................................................13
Power-On Defaults .....................................................................13
Operating Modes ........................................................................13
Power vs. Throughput ................................................................14
Mounting the AD7414/AD7415 ...............................................14
Supply Decoupling......................................................................14
Temperature Accuracy vs. Supply.............................................15
Typical Temperature Error Graph ............................................15
Outline Dimensions........................................................................16
Ordering Guide ...........................................................................17
REVISION HISTORY
4/05—Rev. D to Rev. E
Updated Format..................................................................Universal
Changes to Absolute Maximum Ratings........................................6
Changes to Figure 6...........................................................................7
Changes to Ordering Guide...........................................................17
9/04—REV. C to REV. D.
Changes to ABSOLUTE MAXIMUM RATINGS.........................3
Updated ORDERING GUIDE.........................................................4
8/03—REV. B to REV. C.
Change to Temperature Range......................................... Universal
Updated FEATURES.........................................................................1
Updated SPECIFICATIONS............................................................2
Updated ABSOLUTE MAXIMUM RATINGS .............................3
Updated ORDERING GUIDE.........................................................4
Updated CIRCUIT INFORMATION ............................................5
Updated TEMPERATURE DATA FORMAT................................6
Updated TEMPERATURE VALUE REGISTER ...........................8
Updated Figure 14...........................................................................11
Updated OUTLINE DIMENSIONS.............................................12
11/02—REV. A to REV. B.
Changes to ABSOLUTE MAXIMUM RATINGS.........................3
10/02—REV. 0 to REV. A.
Changes to SPECIFICATIONS .......................................................2
Changes to PIN FUNCTION DESCRIPTIONS...........................3
Changes to ABSOLUTE MAXIMUM RATINGS.........................3
ORDERING GUIDE updated .........................................................4
Change to Figure 2............................................................................5
Added to TYPICAL TEMPERATURE
ERROR GRAPH section ................................................................11
Added Figure 15 ..............................................................................11
OUTLINE DIMENSIONS updated..............................................12
7/01—Revision 0: Initial Version
AD7414/AD7415
Rev. E | Page 3 of 20
SPECIFICATIONS
TA = TMIN to TMAX, VDD = 2.7 V to 5.5 V, unless otherwise noted. Temperature range as follows: A version = −40°C to +125°C.
Table 1.
Parameter A Version Unit Test Conditions/Comments
TEMPERATURE SENSOR AND ADC
Accuracy1±0.5 °C typ VDD = 3 V @ +40°C
−0.87 to +0.822°C max VDD = 3 V @ +40°C
±1.5 °C max VDD = 3 V @ −40°C to +70°C
±2.0 °C max VDD = 3 V @ −40°C to +85°C
±3.0 °C max VDD = 3 V @ −40°C to +125°C
±2.0 °C typ VDD = 3 V @ −40°C to +125°C
±1.872 °C max VDD = 5.5 V @ +40°C
±2.0 °C typ VDD = 5.5 V @ −40°C to +85°C
±3.0 °C max VDD = 5.5 V @ −40°C to +85°C
±3.0 °C typ VDD = 5.5 V @ −40°C to +125°C
Resolution 10 Bits
Update Rate, tR800 ms typ
Temperature Conversion Time 25 µs typ
POWER SUPPLIES
Supply Current3
Peak Supply Current41.2 mA typ Current during conversion
Supply Current – Nonconverting 900 µA max Peak current between conversions
Inactive Serial Bus5
Normal Mode @ 3 V 169 µA typ
Normal Mode @ 5 V 188 µA typ
Supply current with serial bus inactive. Part not
converting and D7 of configuration register = 0.
Active Serial Bus6
Normal Mode @ 3 V 180 µA typ
Normal Mode @ 5 V 214 µA typ
Shutdown Mode 3 µA max
Supply current with serial bus active. Part not
converting and D7 of configuration register = 0.
D7 of configuration register = 1. Typical values
are 0.04 µA at 3 V and 0.5 µA at 5 V.
DIGITAL INPUT
Input High Voltage, VIH 2.4 V min
Input Low Voltage, VIL 0.8 V max
Input Current, IIN7±1 µA max VIN = 0 V to VDD
Input Capacitance, CIN 10 pF max All digital inputs
DIGITAL OUTPUT (OPEN-DRAIN)
Output High Voltage, VOH 2.4 V min
Output Low Voltage, VOL 0.4 V max IOL = 1.6 mA
Output High Current, IOH 1 µA max VOH = 5 V
Output Capacitance, COUT 10 pF max Typ = 3 pF
ALERT Output Saturation Voltage 0.8 V max IOUT = 4 mA
AC ELECTRICAL CHARACTERISTICS8, 9
Serial Clock Period, t12.5 µs min See Figure 2
Data In Setup Time to SCL High, t250 ns min See Figure 2
Data Out Stable after SCL Low, t30 ns min See Figure 2
AD7414/AD7415
Rev. E | Page 4 of 20
Parameter A Version Unit Test Conditions/Comments
SDA Low Setup Time to SCL Low
(Start Condition), t4
50 ns min See Figure 2
SDA High Hold Time after SCL High
(Stop Condition), t5
50 ns min See Figure 2
SDA and SCL Fall Time, t690 ns max See Figure 2
Power-Up Time 4 µs typ
1 Accuracy specifications apply only to voltages listed under Test Conditions. See Temperature Accuracy vs. Supply section for typical accuracy performance over the
full VDD supply range.
2 100% production tested at 40°C to these limits.
3 These current values can be used to determine average power consumption at different one-shot conversion rates. Average power consumption at the automatic
conversion rate of 1.25 kHz is 940 µW.
4 This peak supply current is required for 29 µs (the conversion time plus power-up time) out of every 800 µs (the conversion rate).
5 These current values are derived by not issuing a stop condition at the end of a write or read, thus preventing the part from going into a conversion.
6 The current is derived assuming a 400 kHz serial clock being active continuously.
7 On power-up, the initial input current, IIN, on the AS pin is typically 50 µA.
8 The SDA and SCL timing is measured with the input filters turned on so as to meet the fast mode I2C specification. Switching off the input filters improves the transfer
rate but has a negative effect on the EMC behavior of the part.
9 Guaranteed by design. Not tested in production.
SCL
SDA
DATA IN
SDA
DATA OUT
t
1
t
2
t
3
t
4
t
5
t
6
02463-002
Figure 2. Diagram for Serial Bus Timing
AD7414/AD7415
Rev. E | Page 5 of 20
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
VDD to GND −0.3 V to +7 V
SDA Input Voltage to GND −0.3 V to +7 V
SDA Output Voltage to GND −0.3 V to +7 V
SCL Input Voltage to GND −0.3 V to +7 V
ALERT Output Voltage to GND −0.3 V to +7 V
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C
5-Lead SOT-23 (RJ-5)
Power Dissipation1, 2WMAX = (TJMAX − TA)/θJA
Thermal Impedance3
θJA, Junction-to-Ambient
(still air)
240°C/W
6-Lead SOT-23 (RJ-6)
Power Dissipation1, 2 WMAX = (TJMAX − TA)/θJA
Thermal Impedance3
θJA, Junction-to-Ambient
(still air)
190.4°C/W
8-Lead MSOP (RM-8)
Power Dissipation1, 2 WMAX = (TJMAX − TA)/θJA
Thermal Impedance3
θJA, Junction-to-Ambient
(still air)
205.9°C/W
θJC, Junction-to-Case 43.74°C/W
IR Reflow Soldering
Peak Temperature 220°C (0°C/5°C)
Time at Peak Temperature 10 sec to 20 sec
Ramp-up Rate 3°C/s max
Ramp-down Rate −6°C/s max
Ramp from 25°C to Peak
Temperature
6 minutes max
IR Reflow Soldering in Pb-Free
Package
Peak Temperature 260°C (0°C)
Time at Peak Temperature 20 sec to 40 sec
Ramp Rate 3°C/s max
Ramp-Down Rate −6°C/s max
Ramp from 25°C to Peak
Temperature
8 minutes max
1 Values relate to package being used on a standard 2-layer PCB.
2 TA = ambient temperature.
3 Junction-to-case resistance is applicable to components featuring a
preferential flow direction, such as components mounted on a heat sink.
Junction-to-ambient resistance is more useful for air-cooled, PCB-mounted
components.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
AD7414/AD7415
Rev. E | Page 6 of 20
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
AS SDA
16
V
DD
SCL
GND 2 5ALERT
34
AD7414
Top View
(Not to Scale)
02463-003
Figure 3. AD7414 Pin Configuration (SOT-23)
02463-004
SCL V
DD
NC NC
A
LER
T
GND
SDA 2 7AS
NC = NO CONNECT
18
36
45
AD7414
Top View
(Not to Scale)
Figure 4. AD7414 Pin Configuration (MSOP)
AS SDA
15
V
DD
SCL
GND 2
34
AD7415
Top View
(Not to Scale)
02463-005
Figure 5. AD7415 Pin Configuration (SOT-23)
Table 3. Pin Function Descriptions
Mnemonic Description
AS Logic Input. Address select input that selects one
of three I2C addresses for the AD7414/AD7415 (see
Table 4). Recommend a pull-up or pull-down
resistor of 1 kΩ.
GND Analog and Digital Ground.
VDD Positive Supply Voltage, 2.7 V to 5.5 V.
SDA Digital I/O. Serial bus bidirectional data. Open-
drain output.
ALERT AD7414 Digital Output. Overtemperature
indicator becomes active when temperature
exceeds THIGH. Open-drain output.
SCL Digital Input. Serial bus clock.
Table 4. I2C Address Selection
Part Number AS Pin I2C Address
AD7414-0 Float 1001 000
AD7414-0 GND 1001 001
AD7414-0 VDD 1001 010
AD7414-1 Float 1001 100
AD7414-1 GND 1001 101
AD7414-1 VDD 1001 110
AD7414-2 N/A 1001 011
AD7414-3 N/A 1001 111
AD7415-0 Float 1001 000
AD7415-0 GND 1001 001
AD7415-0 VDD 1001 010
AD7415-1 Float 1001 100
AD7415-1 GND 1001 101
AD7415-1 VDD 1001 110
AD7414/AD7415
Rev. E | Page 7 of 20
THEORY OF OPERATION
CIRCUIT INFORMATION
The AD7414/AD7415 are standalone digital temperature
sensors. The on-chip temperature sensor allows an accurate
measurement of the ambient device temperature to be made.
The 10-bit analog-to-digital converter converts the temperature
measured into a twos complement format for storage in the
temperature register. The ADC is made up of a conventional
successive-approximation converter based around a capacitor
digital-to-analog (DAC). The serial interface is I2C-and SMBus-
compatible. The AD7414/AD7415 require a 2.7 V to 5.5 V
power supply. The temperature sensor has a working
measurement range of −40°C to +125°C.
FUNCTIONAL DESCRIPTION
Temperature measurement is initiated by two methods. The
first uses an internal clock countdown of 800 ms, and a
conversion is performed. The internal oscillator is the only
circuit that is powered up between conversions, and once it
times out, every 800 ms, a wake-up signal is sent to power up
the rest of the circuitry. A monostable is activated at the
beginning of the wake-up signal to ensure that sufficient time is
given to the power-up process. The monostable typically takes
4 µs to time out. It then takes typically 25 µs for each conversion
to be completed. The new temperature value is loaded into the
temperature value register and ready for reading by the I2C
interface.
A temperature measurement is also initiated every time the
one-shot method is used. This method requires the user to
write to the one-shot bit in the configuration register when a
temperature measurement is needed. Setting the one-shot bit to
1 starts a temperature conversion directly after the write
operation. The track-and-hold goes into hold approximately
4 µs (monostable time out) after the STOP condition, and a
conversion is then initiated. Typically 25 µs later, the conversion
is complete and the temperature value register is loaded with a
new temperature value.
The measurement modes are compared with a high tempera-
ture limit, stored in an 8-bit read/write register. This is applica-
ble only to the AD7414, because the AD7415 does not have an
ALERT pin and subsequently does not have an overtemperature
monitoring function. If the measurement is greater than the
high limit, the ALERT pin is activated (if it has already been
enabled in the configuration register). There are two ways to
deactivate the ALERT pin again: when the alert reset bit in the
configuration register is set to 1 by a write operation, and when
the temperature measured is less than the value in the TLOW
register. This ALERT pin is compatible with the SMBus
SMBALERT option.
Configuration functions consist of
• Switching between normal operation and full power-
down
• Enabling or disabling the SCL and SDA filters
• Enabling or disabling the ALERT function
• Setting the ALERT pin polarity
SUPPLY
2.7V TO
5.5V 10µF 1kΩ0.1µF
SDA
SCL
ALERT
AS
GND
AD7414
V
DD
02463-006
10kΩ10kΩ10kΩ
V
DD
V
DD
V
DD
µ
C/
µ
P
Figure 6. Typical Connection Diagram
MEASUREMENT TECHNIQUE
A common method of measuring temperature is to exploit the
negative temperature coefficient of a diode, or the base-emitter
voltage of a transistor, operated at constant current.
Unfortunately, this technique requires calibration to null the
effect of the absolute value of VBE, which varies from device to
device. The technique used in the AD7414/AD7415 is to
measure the change in VBE when the device is operated at two
different currents. This is given by
(
)
NlnqKTVBE
×
=
∆
where:
K is Boltzmann’s constant.
q is the charge on the electron (1.6 × 10–19 Coulombs).
T is the absolute temperature in Kelvins.
N is the ratio of the two currents.
AD7414/AD7415
Rev. E | Page 8 of 20
V
DD
V
OUT
+
V
OUT
–
TO ADC
SENSING
TRANSISTOR
SENSING
TRANSISTOR
II×N
02463-007
Figure 7. Temperature Measurement Technique
Figure 7 shows the method the AD7414/AD7415 use to
measure the ambient device temperature. To measure ΔVBE,
the sensor (substrate transistor) is switched between operating
currents of I and N × I. The resulting waveform is passed
through a chopper stabilized amplifier that performs the
functions of amplification and rectification of the waveform to
produce a dc voltage proportional to ΔVBE. This voltage is
measured by the ADC to give a temperature output in 10-bit,
twos complement format.
TEMPERATURE DATA FORMAT
The temperature resolution of the ADC is 0.25°C, which
corresponds to 1 LSB of the ADC. The ADC can theoretically
measure a temperature span of 255°C; the lowest practical value
is limited to −40°C due to the device maximum ratings. The
A grade can measure a temperature range of −40°C to +125°C.
(Temperature data format is shown in Table 5.)
Table 5. A Grade Temperature Data Format
Temperature Digital Output DB9…DB0
−55°C 11 0010 0100
−50°C 11 0011 1000
−25°C 11 1001 1100
−0.25°C 11 1111 1111
0°C 00 0000 0000
+0.25°C 00 0000 0001
+10°C 00 0010 1000
+25°C 00 0110 0100
+50°C 00 1100 1000
+75°C 01 0010 1100
+100°C 01 1001 0000
+125°C 01 1111 0100
The grade temperature conversion formula follows:
4
)(dCodeADC
eTemperaturPositive =
4
512)(
−
=dCodeADC
eTemperaturNegative
Note that DB9 is removed from the ADC code in the negative
temperature formula.
AD7414/AD7415
Rev. E | Page 9 of 20
INTERNAL REGISTER STRUCTURE
The AD7414 has five internal registers, as shown in Figure 8.
Four are data registers, and one is an address pointer register.
SDA
SCL
TEMPERATURE
VALUE
REGISTER
CONFIGURATION
REGISTER
T
HIGH
REGISTER
T
LOW
REGISTER
D
A
T
A
ADDRESS
POINTER
REGISTER
SERIAL BUS INTERFACE
02463-008
Figure 8. AD7414 Register Structure
The AD7415 has three internal registers, as shown in Figure 9.
Two are data registers, and one is an address pointer register.
SDA
SCL
D
A
T
A
TEMPERATURE
VALUE
REGISTER
CONFIGURATION
REGISTER
ADDRESS
POINTER
REGISTER
02463-009
Figure 9. AD7415 Register Structure
Each data register has an address pointed to by the address
pointer register when communicating with it. The temperature
value register is the only data register that is read-only.
ADDRESS POINTER REGISTER
The address pointer register is an 8-bit register that stores an
address that points to one of the four data registers of the
AD7414 and one of the two data registers of the AD7415. The
first byte of every serial write operation to the AD7414/AD7415
is the address of one of the data registers, which is stored in the
address pointer register and selects the data register to which
subsequent data bytes are written. Only the 2 LSBs of this
register are used to select a data register.
Table 6. Address Pointer Register
P7 P6 P5 P4 P3 P2 P1 P0
0 0 0 0 0 0 Register Select
Table 7. AD7414 Register Address
P1 P0 Register
0 0 Temperature value register (read-only)
0 1 Configuration register (read/write)
1 0 THIGH register (read/write)
1 1 TLOW register (read/write)
Table 8. AD7415 Register Address
P1 P0 Registers
0 0 Temperature value register (read-only)
0 1 Configuration register (read/write)
Table 9. AD7414 Configuration Register
D7 D6 D5 D4 D3 D2 D1 D0
PD FLTR ALERT
EN
ALERT
POLARITY
ALERT
RESET
ONE
SHOT
TEST
MODE
0111010101010s1
1 Default settings at power-up.
CONFIGURATION REGISTER (ADDRESS 0X01)
The configuration register is an 8-bit read/write register that is
used to set the operating modes of the AD7414/AD7415. In the
AD7414, six of the MSBs are used (D7 to D2) to set the
operating modes (see Table 10). D0 and D1 are used for factory
settings and must have zeros written to them during normal
operation.
Table 10. AD7414 Configuration Register Settings
D7 Full power-down if = 1.
D6 Bypass SDA and SCL filtering if = 0.
D5 Disable ALERT if = 1.
D4 ALERT is active low if D4 = 0, ALERT is active high if D4 = 1.
D3 Reset the ALERT pin if set to 1. The next temperature
conversion has the ability to activate the ALERT function.
The bit status is not stored; thus this bit is 0 if read.
D2 Initiate a one shot temperature conversion if set to a 1.
The bit status is not stored; thus this bit is 0 if read.
Table 11. AD7415 Configuration Register
D7 D6 D5 D4 D3 D2 D1 D0
PD FLTR ONE SHOT TEST MODE
0111 TEST MODE
0s1 0s1 0s1
1 Default settings at power-up.
AD7414/AD7415
Rev. E | Page 10 of 20
In the AD7415, only three of the bits are used (D7, D6, and D2)
to set the operating modes (see Table 12). D0, D1, and D3 to D5
are used for factory settings and must have zeros written to
them during normal operation.
Table 12. AD7415 Configuration Register Settings
D7 Full power-down if = 1.
D6 Bypass SDA and SCL filtering if = 0.
D2 Initiate a one-shot temperature conversion if set to 1.
The bit status is not stored; thus this bit is 0 if read.
If the AD7414/AD7415 are in power-down mode (D7 = 1), a
temperature conversion can still be initiated by the one-shot
operation. This involves a write operation to the configuration
register and setting the one-shot bit to 1 (D2 = 1), which causes
the AD7414/AD7415 to power up, perform a single conversion,
and power down again. This is a very power efficient mode.
TEMPERATURE VALUE REGISTER (ADDRESS 0X00)
The temperature value register is a 10-bit, read-only register
that stores the temperature reading from the ADC in twos
complement format. Two reads are necessary to read data from
this register. Table 13 shows the contents of the first byte to be
read, while Table 14 and Table 15 show the contents of the
second byte to be read from the AD7414 and AD7415,
respectively. In Table 14, D3 to D5 of the second byte are used
as flag bits and are obtained from other internal registers. They
function as follows:
ALERT_Flag: The state of this bit is the same as that of the
ALERT pin.
THIGH_Flag: This flag is set to 1 when the temperature
measured goes above the THIGH limit. It is reset
when the second temperature byte (Table 14) is
read. If the temperature is still greater than the
THIGH limit after the read operation, the flag is
again.
TLOW_Flag: This flag is set to 1 when the temperature
measured goes below the TLOW limit. It is reset
when the second temperature byte (Table 14) is
read. If the temperature is still less than the TLOW
limit after the read operation, the flag is set again.
The full theoretical span of the ADC is 255°C, but in practice
the temperature measurement range is limited to the operating
range of the device, −40°C to +125°C for the A grade.
Table 13. Temperature Value Register (First Read)
D15 D14 D13 D12 D11 D10 D9 D8
MSB B8 B7 B6 B5 B4 B3 B2
Table 14. AD7414 Temperature Value Register (Second Read)
D7 D6 D5 D4 D3 D2 D1 D0
B1 LSB ALERT_Flag THIGH_Flag TLOW_Flag 0 0 0
Table 15. AD7415 Temperature Value Register (Second Read)
D7 D6 D5 D4 D3 D2 D1 D0
B1 LSB N/A N/A N/A N/A N/A N/A
AD7414 THIGH REGISTER (ADDRESS 0X02)
The THIGH register (see Table 16) is an 8-bit, read/write register
that stores the upper limit that activates the ALERT output.
Therefore, if the value in the temperature value register is
greater than the value in the THIGH register, the ALERT pin is
activated (that is, if ALERT is enabled in the configuration
register). Because it is an 8-bit register, the temperature
resolution is 1°C.
Table 16. THIGH Register
D7 D6 D5 D4 D3 D2 D1 D0
MSB B6 B5 B4 B3 B2 B1 B0
AD7414 TLOW REGISTER (ADDRESS 0X03)
The TLOW register (see Table 17) is an 8-bit read/write register
that stores the lower limit that deactivates the ALERT output.
Therefore, if the value in the temperature value register is less
than the value in the TLOW register, the ALERT pin is
deactivated (that is, if ALERT is enabled in the configuration
register).
Because it is an 8-bit register, the temperature resolution is 1°C.
Table 17. TLOW Register
D7 D6 D5 D4 D3 D2 D1 D0
MSB B6 B5 B4 B3 B2 B1 B0
AD7414/AD7415
Rev. E | Page 11 of 20
02463-010
FRAME 1
SERIAL BUS ADDRESS BYTE FRAME 2
ADDRESS POINTER REGISTER BYTE
1
SCL
S
D
A
1A2 A1 A0 P7 P6 P5 P4 P3 P2 P1 P0
ACK. BY
AD7414/AD7415 STOP BY
MASTER
START BY
MASTER
1
ACK. BY
AD7414/AD7415
9
19
00R/W
Figure 10. Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation
FRAME 3
DATA BYTE
D7 D6 D5 D4 D3 D2 D1 D0
ACK. BY
AD7414/AD7415 STOP BY
MASTER
SCL (CONTINUED)
SDA (CONTINUED)
1
SCL
SDA 1A2 A1 A0 P7 P6 P5 P4 P3 P2 P1 P0
ACK. BY
AD7414/AD7415
START B
Y
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE FRAME 2
ADDRESS POINTER REGISTER BYTE
ACK. BY
AD7414/AD7415
9
191
11
•••
•••
•••
•••
91
02463-011
R/W
Figure 11. Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Register
SDA
NO ACK. BY
MASTER
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE FRAME 2
SINGLE DATA BYTE FROM AD7414/AD7415
ACK. BY
AD7414/AD7415
D7 D6 D5 D4 D3 D2 D1 D0A0A1A210
1
SCL
STOP BY
MASTER
0R/W
02463-012
Figure 12. Reading a Single Byte of Data from a Selected Register
D7 D6 D5 D4 D3 D2 D1 D0
NO ACK. BY
MASTER STOP BY
MASTER
FRAME 3
LEAST SIGNIFICANT DATA BYTE FROM AD7414/AD7415
SCL (CONTINUED)
SDA (CONTINUED)
1
SCL
SDA 1A2 A1 A0 D15 D14 D13 D12 D10 D11 D9 D8
ACK. BY
MASTER
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE FRAME 2
MOST SIGNIFICANT DATA BYTE FROM AD7414/AD7415
ACK. BY
AD7414/AD7415
19
•••
•••
•••
•••
19
00
19
02463-013
R/W
Figure 13. Reading Two Bytes of Data from the Temperature Value Register
AD7414/AD7415
Rev. E | Page 12 of 20
SERIAL INTERFACE
Control of the AD7414/AD7415 is carried out via the I2C-
compatible serial bus. The AD7414/AD7415 are connected to
this bus as slave device, under the control of a master device,
such as the processor.
SERIAL BUS ADDRESS
Like all I2C-compatible devices, the AD7414/AD7415 have a
7-bit serial address. The four MSBs of this address for the
AD7414/AD7415 are set to 1001. The AD7414/AD7415 are
available in four versions: AD7414/AD7415-0, AD7414/
AD7415-1, AD7414-2, and AD7414-3. The first two versions
have three different I2C addresses available, which are selected
by either tying the AS pin to GND, to VDD, or letting the pin
float (see Table 4). By giving different addresses for the four
versions, up to eight AD7414s or six AD7415s can be connected
to a single serial bus, or the addresses can be set to avoid
conflicts with other devices on the bus.
The serial bus protocol operates as follows.
The master initiates data transfer by establishing a START
condition, defined as a high-to-low transition on the serial data
line SDA, while the serial clock line SCL remains high. This
indicates that an address/data stream follows. All slave periph-
erals connected to the serial bus respond to the START condi-
tion and shift in the next eight bits, consisting of a 7-bit address
(MSB first) plus an R/W bit, which determines the direction of
the data transfer and whether data is written to or read from the
slave device.
The peripheral whose address corresponds to the transmitted
address responds by pulling the data line low during the low
period before the ninth clock pulse, known as the acknowledge
bit. All other devices on the bus remain idle while the selected
device waits for data to be read from or written to it. If the R/W
bit is 0, the master writes to the slave device. If the R/W bit is 1,
the master reads from the slave device.
Data is sent over the serial bus in sequences of nine clock
pulses, eight bits of data followed by an acknowledge bit from
the receiver of data. Transitions on the data line must occur
during the low period of the clock signal and remain stable
during the high period, because a low-to-high transition when
the clock is high may be interpreted as a STOP signal.
When all data bytes have been read or written, stop conditions
are established. In WRITE mode, the master pulls the data line
high during the 10th clock pulse to assert a STOP condition. In
READ mode, the master device pulls the data line high during
the low period before the ninth clock pulse. This is known as
No Acknowledge. The master then takes the data line low
during the low period before the 10th clock pulse, then high
during the 10th clock pulse to assert a STOP condition.
Any number of bytes of data may be transferred over the serial
bus in one operation, but it is not possible to mix read and write
in one operation. The type of operation is determined at the
beginning and cannot then be changed without starting a new
operation.
WRITE MODE
Depending on the register being written to, there are two
different writes for the AD7414/AD7415.
Writing to the Address Pointer Register for a Subsequent
Read
In order to read data from a particular register, the address
pointer register must contain the address of that register. If it
does not, the correct address must be written to the address
pointer register by performing a single-byte write operation, as
shown in Figure 10. The write operation consists of the serial
bus address followed by the address pointer byte. No data is
written to any of the data registers. A read operation is then
performed to read the register.
Writing a Single Byte of Data to the Configuration
Register,THIGH Register, or TLOW Register
All three registers are 8-bit registers, so only one byte of data
can be written to each register. Writing a single byte of data to
one of these registers consists of the serial bus address, the data
register address written to the address pointer register, followed
by the data byte written to the selected data register. This is
illustrated in Figure 11.
READ MODE
Reading data from the AD7414/AD7415 is a 1- or 2-byte
operation. Reading back the contents of the configuration
register, the THIGH register, or the TLOW register is a single-byte
read operation, as shown in Figure 12. The register address was
previously set up by a single-byte write operation to the address
pointer register. Once the register address has been set up, any
number of reads can subsequently be performed from that
register without having to write to the address pointer register
again. To read from another register, the address pointer
register has to be written to again to set up the relevant register
address.
Reading data from the temperature value register is a 2-byte
operation, as shown in Figure 13. The same rules apply for a
2-byte read as a 1-byte read.
AD7414/AD7415
Rev. E | Page 13 of 20
SMBUS ALERT
The AD7414 ALERT output is an SMBus interrupt line for
devices that want to trade their ability to master for an extra
pin. The AD7414 is a slave-only device and uses the SMBus
ALERT to signal to the host device that it wants to talk. The
SMBus ALERT on the AD7414 is used as an overtemperature
indicator.
The ALERT pin has an open-drain configuration that allows the
ALERT outputs of several AD7414s to be wire-AND’ed together
when the ALERT pin is active low. Use D4 of the configuration
register to set the active polarity of the ALERT output. The
power-up default is active low. The ALERT function can be
disabled or enabled by setting D5 of the configuration register
to 1 or 0, respectively.
The host device can process the ALERT interrupt and
simultaneously access all SMBus ALERT devices through the
alert response address. Only the device that pulled the ALERT
low acknowledges the Alert Response Address (ARA). If more
than one device pulls the ALERT pin low, the highest priority
(lowest address) device wins communication rights via standard
I2C arbitration during the slave address transfer.
The ALERT output becomes active when the value in the
temperature value register exceeds the value in the THIGH
register. It is reset when a write operation to the configuration
register sets D3 to 1 or when the temperature falls below the
value stored in the TLOW register.
The ALERT output requires an external pull-up resistor. This
can be connected to a voltage different from VDD, provided the
maximum voltage rating of the ALERT output pin is not
exceeded. The value of the pull-up resistor depends on the
application, but it should be as large as possible to avoid
excessive sink currents at the ALERT output, which can heat the
chip and affect the temperature reading.
POWER-ON DEFAULTS
The AD7414/AD7415 always power up with these defaults:
Address pointer register pointing to the temperature value
register.
THIGH register loaded with 7Fh.
TLOW register loaded with 80h.
Configuration register loaded with 40h.
Note that the AD7415 does not have any THIGH or TLOW registers.
OPERATING MODES
Mode 1
This is the power-on default mode of the AD7414/AD7415. In
this mode, the AD7414/AD7415 does a temperature conversion
every 800 ms and then partially powers down until the next
conversion occurs.
If a one-shot operation (setting D2 of the configuration register
to a 1) is performed between automatic conversions, a conver-
sion is initiated right after the write operation. After this
conversion, the part returns to performing a conversion every
800 ms.
Depending on where a serial port access occurs during a
conversion, that conversion might be aborted. If the conversion
is completed before the part recognizes a serial port access, the
temperature register is updated with the new conversion. If the
conversion is completed after the part recognizes a serial port
access, the internal logic prevents the temperature register from
being updated, because corrupt data could be read.
A temperature conversion can start anytime during a serial port
access (other than a one-shot operation), but the result of that
conversion is loaded into the temperature register only if the
serial port access is not active at the end of the conversion.
Mode 2
The only other mode in which the AD7414/AD7415 operates is
the full power-down mode. This mode is usually used when
temperature measurements are required at a very slow rate. The
power consumption of the part can be greatly reduced in this
mode by writing to the part to go to a full power-down. Full
power-down is initiated right after D7 of the configuration
register is set to 1.
When a temperature measurement is required, a write
operation can be performed to power up the part and put it into
one-shot mode (setting D2 of the configuration register to a 1).
The power-up takes approximately 4 µs. The part then performs
a conversion and is returned to full power-down. The
temperature value can be read in the full power-down mode,
because the serial interface is still powered up.
AD7414/AD7415
Rev. E | Page 14 of 20
POWER VS. THROUGHPUT
The two modes of operation for the AD7414/AD7415 produce
different power vs. throughput performances. Mode 2 is the
sleep mode of the part, and it achieves the optimum power
performance.
Mode 1
In this mode, continuous conversions are performed at a rate of
approximately one every 800 ms. Figure 14 shows the times and
currents involved with this mode of operation for a 5 V supply.
At 5 V, the current consumption for the part when converting is
1.1 mA typically, and the quiescent current is 188 µA typically.
The conversion time of 25 µs plus power-up time of typically
4 µs contributes 199.3 nW to the overall power dissipation in
the following way:
(29 µs/800 ms) × (5 × 1.1 mA) = 199.3 nW
The contribution to the total power dissipated by the remaining
time is 939.96 µW.
(799.97 ms/800 ms) × (5 × 1.1 µA) = 199.3 µW
Thus the total power dissipated during each cycle is
199.3 nW + 939.96 µW = 940.16 µW
I
DD
TIME
1.1mA
188µA
800ms 29µs
02463-014
Figure 14. Mode 1 Power Dissipation
Mode 2
In this mode, the part is totally powered down. All circuitry
except the serial interface is switched off. The most power
efficient way of operating in this mode is to use the one-shot
method. Write to the configuration register and set the one-shot
bit to a 1. The part powers up in approximately 4 µs and then
performs a conversion. Once the conversion is finished, the
device powers down again until the PD bit in the configuration
register is set to 0 or the one-shot bit is set to 1. Figure 15 shows
the same timing as Figure 14 in mode 1; a one-shot is initiated
every 800 ms. If we take the voltage supply to be 5 V, we can
work out the power dissipation in the following way. The
current consumption for the part when converting is 1.1 mA
typically, and the quiescent current is 800 nA typically. The
conversion time of 25 µs plus the power-up time of
typically 4 µs contributes 199.3 nW to the overall power
dissipation in the following way:
(29 µs/800 ms) × (5 V × 1.1 mA) = 199.3 nW
The contribution to the total power dissipated by the remaining
time is 3.9 µW.
(799.971 ms/800 ms) × (5 V × 800 nA) = 3.9 µW
Thus the total power dissipated during each cycle is:
199.3 nW + 3.9 µW = 940.16 µW
I
DD
TIME
1.1mA
800nA
800ms 29µs
02463-015
Figure 15. Mode 2 Power Dissipation
MOUNTING THE AD7414/AD7415
The AD7414/AD7415 can be used for surface or air tempera-
ture sensing applications. If the device is cemented to a surface
with thermally conductive adhesive, the die temperature is
within about 0.1°C of the surface temperature, due to the
device’s low power consumption. Care should be taken to
insulate the back and leads of the device from the air if the
ambient air temperature is different from the surface
temperature being measured.
The ground pin provides the best thermal path to the die, so the
temperature of the die is close to that of the printed circuit
ground track. Care should be taken to ensure that this is in
good thermal contact with the surface being measured.
As with any IC, the AD7414/AD7415 and their associated
wiring and circuits must be kept free from moisture to prevent
leakage and corrosion, particularly in cold conditions where
condensation is more likely to occur. Water-resistant varnishes
and conformal coatings can be used for protection. The small
size of the AD7414/AD7415 packages allows them to be
mounted inside sealed metal probes, which provide a safe
environment for the devices.
SUPPLY DECOUPLING
The AD7414/AD7415 should at least be decoupled with a 0.1µF
ceramic capacitor between VDD and GND. This is particularly
important if the AD7414/AD7415 are mounted remote from
the power supply.
AD7414/AD7415
Rev. E | Page 15 of 20
TEMPERATURE ACCURACY VS. SUPPLY
The temperature accuracy specifications are guaranteed for
voltage supplies of 3 V and 5.5 V only. Figure 16 gives the
typical performance characteristics of a large sample of parts
over the full voltage range of 2.7 V to 5.5 V. Figure 17 gives the
typical performance characteristics of one part over the full
voltage range of 2.7 V to 5.5 V.
SUPPLYVOLTAGE(V)
2.7
TEMPERATURE ERROR (°C)
–4
4
5.5
–3
–2
–1
0
1
2
3
3.0
–40°C
+40°C
+85°C
02463-016
Figure 16. Typical Temperature Error vs. Supply for Large Sample of Parts
3.3 5.0
SUPPLYVOLTAGE(V)
2.7
TEMPERATURE ERROR (°C)
–4
4
5.5
–3
–2
–1
0
1
2
3
–40°C
+40°C
+85°C
02463-017
Figure 17. Typical Temperature Error vs. Supply for One Part
TYPICAL TEMPERATURE ERROR GRAPH
Figure 18 shows the typical temperature error plots for one
device with VDD at 3.3 V and at 5.5 V.
02463-018
TEMPERATURE ERROR (°C)
–4
4
–3
–2
–1
0
1
2
3
5.5V
3.3V
–40–30–20 –10 0 10 20 30 40 50 60 70 80 90 95 100110 125
TEMPERATURE (°C)
Figure 18. Typical Temperature Error @ 3.3 V and 5.5 V
Figure 19 shows a histogram of the temperature error at
ambient temperature (40°C) over approximately 6,000 units.
Figure 19 shows that over 70% of the AD7414/AD7415 devices
tested have a temperature error within ±0.3°C.
0
100
200
300
400
500
600
700
800
900
NUMBER OF UNITS
02463-019
–1.08 –0.81 –0.54 –0.27 0 0.27 0.54 0.81 1.08
TEMPERATURE ERROR (°C)
AMBIENT TEMPERATURE = 40°C
Figure 19. Ambient Temperature Error @ 3 V
AD7414/AD7415
Rev. E | Page 16 of 20
OUTLINE DIMENSIONS
1 3
45
2
6
2.90 BSC
1.60 BSC 2.80 BSC
1.90
BSC
0.95 BSC
0.22
0.08 10°
4°
0°
0.50
0.30
0.15 MAX
1.30
1.15
0.90
SEATING
PLANE
1.45 MAX
0.60
0.45
0.30
PIN 1
INDICATOR
COMPLIANT TO JEDEC STANDARDS MO-178AB
Figure 20. 6-Lead Small Outline Transistor Package [SOT-23]
(RT-6)
Dimensions shown in millimeters
0.80
0.60
0.40
8°
0°
4
8
1
5
4.90
BSC
PIN 1 0.65 BSC
3.00
BSC
SEATING
PLANE
0.15
0.00
0.38
0.22
1.10 MAX
3.00
BSC
COPLANARITY
0.10
0.23
0.08
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 21. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
PIN 1
1.60 BSC 2.80 BSC
1.90
BSC
0.95 BSC
1
3
4 5
2
0.22
0.08 10°
5°
0°
0.50
0.30
0.15 MAX SEATING
PLANE
1.45 MAX
1.30
1.15
0.90
2.90 BSC
0.60
0.45
0.30
COMPLIANT TO JEDEC STANDARDS MO-178AA
Figure 22. 5-Lead Small Outline Transistor Package [SOT-23]
(RT-5)
Dimensions shown in millimeters
AD7414/AD7415
Rev. E | Page 17 of 20
ORDERING GUIDE
Model
Temperature
Range
Typ Temperature
Error @ 3 V
Package
Option
Package
Description Branding
Minimum
Quantities/Reel
AD7414ART-0REEL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHA 3,000
AD7414ART-0REEL −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHA 10,000
AD7414ART-0500RL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHA 500
AD7414ARTZ-0REEL71−40°C to +125°C ±2°C RT-6 6-Lead SOT-23 #CHA 3,000
AD7414ARTZ-0REEL1 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 #CHA 10,000
AD7414ARTZ-0500RL71 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 #CHA 500
AD7414ARM-0REEL7 −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHA 3,000
AD7414ARM-0REEL −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHA 10,000
AD7414ARM-0 −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHA
AD7414ARMZ-0REEL71 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOL 3,000
AD7414ARMZ-0REEL1 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOL 10,000
AD7414ARMZ-01 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOL
AD7414ART-1REEL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHB 3,000
AD7414ART-1REEL −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHB 10,000
AD7414ART-1500RL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHB 500
AD7414ARTZ-1REEL71 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOH 3,000
AD7414ARTZ-1REEL1 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOH 10,000
AD7414ARTZ-1500RL71 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOH 500
AD7414ARM-1REEL7 −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHB 3,000
AD7414ARM-1REEL −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHB 10,000
AD7414ARM-1 −40°C to +125°C ±2°C RM-8 8-Lead MSOP CHB
AD7414ARMZ-1REEL71 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOH 3,000
AD7414ARMZ-1REEL1 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOH 10,000
AD7414ARMZ-11 −40°C to +125°C ±2°C RM-8 8-Lead MSOP TOH
AD7414ART-2REEL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHC 3,000
AD7414ART-2REEL −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHC 10,000
AD7414ARTZ-2REEL71 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOJ 3,000
AD7414ARTZ-2REEL1 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOJ 10,000
AD7414ART-3REEL7 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHD 3,000
AD7414ART-3REEL −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 CHD 10,000
AD7414ARTZ-3REEL71 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOK 3,000
AD7414ARTZ-3REEL1 −40°C to +125°C ±2°C RT-6 6-Lead SOT-23 TOK 10,000
AD7415ART-0REEL7 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGA 3,000
AD7415ART-0REEL −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGA 10,000
AD7415ART-0500RL7 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGA 500
AD7415ARTZ-0REEL71 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGA 3,000
AD7415ARTZ-0REEL1 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGA 10,000
AD7415ARTZ-0500RL71 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGA 500
AD7415ART-1REEL7 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGB 3,000
AD7415ART-1REEL −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGB 10,000
AD7415ART-1500RL7 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 CGB 500
AD7415ARTZ-1REEL71 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGB 3,000
AD7415ARTZ-1REEL1 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGB 10,000
AD7415ARTZ-1500RL71 −40°C to +125°C ±2°C RT-5 5-Lead SOT-23 #CGB 500
EVAL-AD7414/15EB Evaluation
Board
1 Z = Pb-free part.
AD7414/AD7415
Rev. E | Page 18 of 20
NOTES
AD7414/AD7415
Rev. E | Page 19 of 20
NOTES
AD7414/AD7415
Rev. E | Page 20 of 20
NOTES
Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I2C Patent
Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
© 2005 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C02463-0-4/05(E)
