ADT7420UCPZ-RL7

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1. DESCRIPTION

The ADT7420UCPZ-RL7 is a high accuracy digital temperature sensor offering breakthrough performance over a wide industrial range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit ADC to monitor and digitize the temperature to 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 ADT7420UCPZ-RL7 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 ADT7420UCPZ-RL7 has a shutdown mode that powers down the device and offers a shutdown current of typically 2.0 μA at 3.3 V. The ADT7420UCPZ-RL7 is rated for operation over the −40°C to +150°C temperature range. Pin A0 and Pin A1 are available for address selection, giving the ADT7420UCPZ-RL7 four possible I2C addresses. The CT pin is an opendrain output that becomes active when the temperature exceeds a programmable critical temperature limit. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT pin and CT pin can operate in comparator and interrupt event modes.

2. FEATURES

    1. High performance

        - Temperature accuracy

        - 16-bit resolution: 0.0078°C

    2. Ultralow temperature drift: 0.0073°C

        - NIST traceable or equivalent

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

    3. Easy implementation

        - No temperature calibration/correction required by user

        - No linearity correction required

    4. 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

    5. Wide operating ranges

        - Temperature range: −40°C to +150°C

        - Voltage range: 2.7 V to 5.5 V

    6. Programmable interrupts

        - Critical overtemperature interrupt

        - Overtemperature/undertemperature interrupt

    7. I2C-compatible interface

    8. 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package

3. APPLICATIONS

    1. RTD and thermistor replacement

    2. Thermocouple cold junction compensation

    3. Medical equipment

    4. Industrial control and test

    5. Food transportation and storage

    6. Environmental monitoring and HVAC

    7. Laser diode temperature control