Power Electronics

Addressable Digital Temperature Sensor Uses I2C Bus

Maxim Integrated Products’ DS75LX is a low-voltage digital temperature sensor that allows up to 27 addresses on one I2C communication bus. The sensor provides three dedicated address pins that can be placed in one of three states: ground, VDD and floating. The DS75LX operates from a 1.7-V to 3.7-V supply voltage, and it can be connected directly to low-voltage supply rails.

The temperature sensor is factory calibrated to an accuracy of ±2.0°C over its entire supply-voltage range and a temperature range of -25°C to +100°C. Temperature is reported as user-selectable 9-, 10-, 11-, or 12-bit digital temperature readings that translate to resolutions between 0.5°C (9 bits) and 0.0625°C (12 bits). The DS75LX also has thermostat functionality with user-defined trip points that allow the user to customize the threshold temperature and output hysteresis. It is available in both 8-pin microSOP (microMAX) and 8-pin SO packages. Prices start at $0.75 for 1000 pieces.

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