TMP75BIDGKR Sensors, Transducers

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1. Description

The TMP75BIDGKR is an integrated digital temperature sensor with a 12-bit analog-to-digital converter (ADC) that can operate at a 1.8-V supply, and is pin and register compatible with the industry-standard LM75 and TMP75. This device is available in SOIC-8 and VSSOP-8 packages, and requires no external components to sense the temperature. The TMP75BIDGKR is capable of reading temperatures with a resolution of 0.0625°C and is specified over a temperature range of –55°C to +125°C. The TMP75BIDGKR features SMBus and two-wire interface compatibility, and allows up to eight devices on the same bus with the SMBus overtemperature alert function. The programmable temperature limits and the ALERT pin allow the sensor to operate as a stand-alone thermostat, or an overtemperature alarm for power throttling or system shutdown. The factory-calibrated temperature accuracy and the noise-immune digital interface make the TMP75BIDGKR the preferred solution for temperature compensation of other sensors and electronic components, without the need for additional system-level calibration or elaborate board layout for distributed temperature sensing. The TMP75BIDGKR is ideal for thermal management and protection of a variety of consumer, computer, communication, industrial, and environmental applications.

2. Features

    1. Low-Voltage Alternative to LM75 and TMP75

    2. Digital Output with Standard Two-Wire Serial Interface

    3. Up to 8 Pin-Programmable Bus Addresses

    4. Overtemperature ALERT Pin with Programmable Trip Values

    5. Shutdown Mode for Battery Power Saving

    6. One-Shot Conversion Mode for Custom Update Rates

    7. Operating Temperature Range: –55°C to +125°C

    8. Operating Supply Range: 1.4 V to 3.6 V

    9. Quiescent Current:

        – 45 μA Active (typ)

        – 0.3 μA Shutdown (typ) 

  10. Accuracy:

        – ±0.5°C (typ) from –20°C to +85°C

        – ±1°C (typ) from –55°C to +125°C

  11. Resolution: 12 Bits (0.0625°C)

  12. Packages: SOIC-8 and VSSOP-8

3. Applications

    1. Server and Computer Thermal Management

    2. Telecommunication Equipment

    3. Office Machines

    4. Video Game Consoles

    5. Set-Top Boxes

    6. Power Supply and Battery Thermal Protection

    7. Thermostat Control 

    8. Environmental Monitoring and HVAC

    9. Electrical Motor Driver Thermal Protection

4. Application Information

The TMP75BIDGKR is used to measure the PCB temperature of the location it is mounted. The programmable address options allow up to eight locations on the board to be monitored on a single serial bus. Connecting the ALERT pins together and programming the temperature limit registers to desired values allows for a temperature watchdog operation of all devices, interrupting the host controller only if the temperature exceeds the limits.