Datasheet ADT7410 (Analog Devices)

±0.5°C Accurate, 16-Bit Digital I2C Temperature Sensor Data Sheet ADT7410 FEATURES GENERAL DESCRIPTION High performance
The ADT7410 is a high accuracy digital temperature sensor in a
Temperature accuracy
narrow SOIC package. It contains a band gap temperature reference
±0.5°C from −40°C to +105°C (2.7 V to 3.6 V)
and a 13-bit ADC to monitor and digitize the temperature to a
±0.4°C from −40°C to +105°C (3.0 V)
0.0625°C resolution. The ADC resolution, by default, is set to
16-bit temperature resolution: 0.0078°C
13 bits (0.0625°C). This can be changed to 16 bits (0.0078°C) by
Fast first temperature conversion on power-up of 6 ms
setting Bit 7 in the configuration register (Register Address 0x03).
Easy implementation No temperature calibration/correction required by user
The ADT7410 is guaranteed to operate over supply voltages from
No linearity correction required
2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typi-
Low power
cal y 210 μA. The ADT7410 has a shutdown mode that powers
Power saving 1 sample per second (SPS) mode
down the device and offers a shutdown current of typical y 2 μA.
700 µW typical at 3.3 V in normal mode
The ADT7410 is rated for operation over the −55°C to +150°C
7 µW typical at 3.3 V in shutdown mode
temperature range.
Wide operating ranges
Pin A0 and Pin A1 are available for address selection, giving the
Temperature range: −55°C to +150°C
ADT7410 four possible I2C addresses. The CT pin is an open-
Voltage range: 2.7 V to 5.5 V
drain output that becomes active when the temperature exceeds
Programmable interrupts
a programmable critical temperature limit. The default critical
Critical overtemperature interrupt
temperature limit is 147°C. The INT pin is also an open-drain
Overtemperature/undertemperature interrupt
output that becomes active when the temperature exceeds a
I2C-compatible interface
programmable limit. The INT and CT pins can operate in either
8-lead narrow SOIC RoHS-compliant package
comparator or interrupt mode.
APPLICATIONS Medical equipment Environmental control systems Computer thermal monitoring Thermal protection Industrial process control Power system monitors Hand-held applications FUNCTIONAL BLOCK DIAGRAM VDD 8 TEMPERATURE ADT7410 VALUE REGISTER INTERNAL OSCILLATOR 6 CT CONFIGURATION TCRIT REGISTER INTERNAL TCRIT REFERENCE REGISTER 5 INT Σ-Δ T TEMPERATURE T HIGH HIGH MODULATOR REGISTER SENSOR TLOW REGISTER TLOW THYST POINTER FILTER REGISTER REGISTER LOGIC A0 3 1 SCL I2C INTERFACE A1 4 2 SDA 7
001
GND
06560- Figure 1.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS I2C TIMING SPECIFICATIONS Timing Diagram ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS TEMPERATURE MEASUREMENT ONE-SHOT MODE 1 SPS MODE CT and INT Operation in One-Shot Mode SHUTDOWN FAULT QUEUE TEMPERATURE DATA FORMAT TEMPERATURE CONVERSION FORMULAS 16-Bit Temperature Data Format 13-Bit Temperature Data Format 10-Bit Temperature Data Format 9-Bit Temperature Data Format REGISTERS ADDRESS POINTER REGISTER TEMPERATURE VALUE REGISTERS STATUS REGISTER CONFIGURATION REGISTER THIGH SETPOINT REGISTERS TLOW SETPOINT REGISTERS TCRIT SETPOINT REGISTERS THYST SETPOINT REGISTER ID REGISTER SERIAL INTERFACE SERIAL BUS ADDRESS WRITING DATA READING DATA RESET GENERAL CALL INT AND CT OUTPUTS UNDERTEMPERATURE AND OVERTEMPERATURE DETECTION Comparator Mode Interrupt Mode APPLICATIONS INFORMATION THERMAL RESPONSE TIME SUPPLY DECOUPLING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE