ADT7310TRZ-REEL7

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1. DESCRIPTION

The ADT7310 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 0x01). The ADT7310 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 ADT7310 has a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. The ADT7310 is rated for operation over the −55°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.

2. FEATURES

    1. High performance

        - Temperature accuracy

        - 16-bit temperature resolution: 0.0078°C

        - Fast first temperature conversion on power-up of 6 ms

    2. Easy implementation

        - No temperature calibration/correction required by user

        - No linearity correction required

    3. 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

    4. Wide operating ranges

        - Temperature range: −55°C to +150°C

        - Voltage range: 2.7 V to 5.5 V

    5. Programmable interrupts

        - Critical overtemperature interrupt

        - Overtemperature/undertemperature interrupt

    6. SPI-compatible interface

    7. 8-lead narrow SOIC RoHS-compliant package

3. APPLICATIONS

    1. Medical equipment

    2. Environmental control systems

    3. Computer thermal monitoring

    4. Thermal protection

    5. Industrial process control

    6. Power system monitors

    7. Hand-held applications