±0.5°C Accurate, 16-Bit Digital IC Temperature Sensor

The ADT7410 is a high accuracy digital temperature sensor in a narrow SOIC package. It contains a band gap temperature reference and a 13-bit ADC to monitor and digitize the temperature to a 0.0625°C resolution. The ADC resolution, by default, is set to 13 bits (0.0625°C). This can be changed to 16 bits (0.0078°C) by setting Bit 7 in the configuration register (Register Address 0x03).

The ADT7410 is guaranteed to operate over supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typically 210 μA. The ADT7410 has a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. The ADT7410 is rated for operation over the −55°C to +150°C temperature range.

Pin A0 and Pin A1 are available for address selection, giving the ADT7410 four possible I2C addresses. The CT pin is an open-drain output that becomes active when the temperature exceeds a programmable critical temperature limit. The default critical temperature limit is 147°C. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT and CT pins can operate in either comparator or interrupt mode.

Applications

* Medical equipment

* Environmental control systems

* Computer thermal monitoring

* Thermal protection

* Industrial process control

* Power system monitors

* Hand-held applications

* High performance

* Temperature accuracy

* ±0.5°C from −40°C to +105°C (2.7 V to 3.6 V)

* ±0.4°C from −40°C to +105°C (3.0 V)

* 16-bit temperature resolution: 0.0078°C

* 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: −55°C to +150°C

* Voltage range: 2.7 V to 5.5 V

* Programmable interrupts

* Critical overtemperature interrupt

* Overtemperature/undertemperature interrupt

* I2C-compatible interface

* 8-lead narrow SOICRoHS-compliant package