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GENERAL DESCRIPTION

The ADT7320 is a high accuracy digital temperature sensor that offers breakthrough performance over a wide industrial temperature range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit analog-to-digital converter (ADC) to monitor and digitize the temperature to a resolution of 0.0078°C. The ADC resolution, by default, is set to 13 bits (0.0625°C). The ADC resolution is a user programmable mode that can be changed through the serial interface.

FEATURES

High performance

Temperature accuracy

±0.20°C from ?10°C to +85°C at 3.0 V

±0.25°C from ?20°C to +105°C at 2.7 V to 3.3 V

16-bit temperature resolution: 0.0078°C

Ultralow temperature drift: 0.0073°C

NIST traceable or equivalent

Fast first temperature conversion on power-up of 6 ms

Easy implementation

No temperature calibration/correction required by user

No linearity correction required

Low power

Power saving 1 sample per second (SPS) mode

700 μW typical at 3.3 V in normal mode

7 μW typical at 3.3 V in shutdown mode

Wide operating ranges

Temperature range: ?40°C to +150°C

Voltage range: 2.7 V to 5.5 V

Programmable interrupts

Critical overtemperature interrupt

Overtemperature/undertemperature interrupt

SPI-compatible interface

16-lead, RoHS-compliant, 4 mm × 4 mm LFCSP package

APPLICATIONS

RTD and thermistor replacement

Thermocouple cold junction compensation

Medical equipment

Industrial control and test

Food transportation and storage

Environmental monitoring and HVAC

Laser diode temperature control