Description

    The AT75B and AT75C are industry-standard digital temperature sensors with an integrated Sigma-Delta analog-to-digital converter and I²C interface. The AT75 provides 9-bit digital temperature readings with an accuracy of ±2°C from -25°C to 100°C and ±3°C over –55°C to 125°C.

    Communication is accomplished over a 2-wire interface which operates up to 400kHz. The AT75 has three address pins, allowing up to eight AT75 devices to operate on the same 2-wire bus. The AT75 has a dedicated over-temperature output (O.S.) with programmable limit and hystersis. This output has programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated.

    The wide temperature and supply range and I²C interface make the AT75 ideal for a number of applications including base stations, electronic test equipment, office electronics, personal computers, and any other system where thermal management is critical to performance. The AT75B and AT75C are available in an SOIC package or VSSOP package.

Features

    No External Components Required

    Shutdown Mode to Minimize Power Consumption

    Up to Eight AT75s Can be Connected to a Single Bus

    Power Up Defaults Permit Stand-alone Operation as Thermostat

    UL Recognized Component (AT75B and AT75C)

    Key Specifications:

    –  Supply Voltage

    –  AT75B, AT75C: 3 V to 5.5 V

    –  Supply Current

    –  Operating: 280 μA (typical)

    –  Shutdown: 4 μA (typical)

    –  Temperature Accuracy

    –  −25°C to 100°C: ±2°C (maximum)

    –  −55°C to 125°C: ±3°C (maximum)

Applications

    General System Thermal Management

    Communications Infrastructure

    Electronic Test Equipment

    Environmental Monitoring

Typical Application