Automotive, ±1°C Accurate, 16-Bit, 175°C Digital SPI Temperature Sensor in Die Form

The ADT7312 is a ±1°C accurate digital temperature sensor that operates over a very wide temperature range, −55°C to +175°C available in die form only. 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.

The ADT7312 is guaranteed to operate over supply voltages from 2.7 V to 5.5 V. At 3.6 V operation, the average supply current is typically 245 μA. The ADT7312 has a shutdown mode that powers down the device, resulting in a typical shutdown current of 2.5 μA at 3.6 V. The ADT7312 is rated for operation over the −55°C to +175°C temperature range.

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 pin and the CT pin can operate in either comparator or interrupt mode.

PPRODUCT HIGHLIGHTS

* Ease of use, no calibration or correction required.

* Low power consumption.

* Excellent long-term stability and reliability.

* Qualified for automotive applications.

APPLICATIONS

* Automotive

* High temperature monitoring

* High temperature thermal protection

* Qualified for automotive applications

* Temperature accuracy:

±1°C from −55°C to +175°C (2.7V to 3.3V)

16-bit temperature resolution: 0.0078°C

Fast first temperature conversion on power-up of 6 ms

* Easy implementation:

No temperature calibration or correction required

No linearity correction required