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

The ADT7311 is a high accuracy digital temperature sensor in a narrow 8-lead SOIC package. It contains a band gap temperature reference and a 16-bit ADC to monitor and digitize the temperature to a 0.0078°C resolution. 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 ADT7311 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 ADT7311 has a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. The ADT7311 is rated for operation over the −40°C to +150°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 and CT pins can operate in either comparator or interrupt mode.

PRODUCT HIGHLIGHTS

* Ease of use, no calibration or correction required by the user.

* Low power consumption.

* Excellent long-term stability and reliability.

* Packaged in an 8-lead SOIC, RoHS-compliant package.

APPLICATIONS

* Battery management

* Climate control and infotainment

* Lighting

* Powertrain

* Thermocouple cold junction compensation

* GPS

* Qualified for automotive 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)