Analogue, Mixed Signal, LSI


Highly accurate 1-wire temperature sensor

29 April 2020 Analogue, Mixed Signal, LSI

The MAX31825 temperature sensor from Maxim Integrated provides 8-bit to 12-bit Celsius temperature measurements with better than ±1°C accuracy from 0°C to +70°C and ±1,75°C from -45°C to +145°C.

The sensor communicates over a 1-wire bus that, by definition, requires only one data line (and ground) for communication with a microcontroller. In addition, the sensor can derive power directly from the data line (‘parasite power’), eliminating the need for an external power supply.

Each sensor has a unique 64-bit serial code, which allows multiple MAX31825 ICs to reside on the same 1-wire bus. In addition, it includes two address input pins that, using an external resistor and pin-strapping, allow one of 64 different addresses to be selected to identify each sensor's physical location. Therefore, it is simple to use one microprocessor to control many devices distributed over a large area.

The MAX31825 is available in a 6-bump WLP package. The power supply voltage range is from 1,6 V to 3,6 V for external power supplies, and from 2,3 V to 3,6 V for parasite power. The operating temperature range is from -45°C to +145°C.

For more information contact CST Electronics, +27 11 608 0070, sales@cstelectronics.co.za, www.cstelectronics.co.za


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