Digital Thermometers with SPI/3-Wire


Digital Thermometers with SPI/3-Wire

Digital Thermometers with SPI/3 Wire

The MAX31722/MAX31723 digital thermometers and thermostats with an SPI™/3-wire interface provide temperature readings that indicate the device temperature. No additional components are required; the devices are truly temperature-to-digital converters. Temperature readings are communicated from the device over an SPI interface or a 3-wire serial interface. The choice of interface is selectable by the user. For applications that require greater temperature resolution, the user can adjust the readout resolution from 9 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be detected quickly. The thermostat has a dedicated open-drain output (active-low TOUT). Two thermostat operating modes, comparator and interrupt, control thermostat operation based on user-defined nonvolatile trip points (THIGH and TLOW). Both devices feature a 1.7V to 3.7V supply rail.

Key Features
  • Temperature Measurements Require No External Components
  • Measures Temperatures from -55°C to +125°C
  • MAX31722 Thermometer Accuracy is ±2.0°C
  • MAX31723 Thermometer Accuracy is ±0.5°C
  • Thermometer Resolution is Configurable from 9 to 12 Bits (0.5°C to 0.0625°C Resolution)
  • Thermostat Output with User-Defined Nonvolatile Thresholds
  • Data is Read from/Written to by SPI (Modes 0 and 2) or 3-Wire Serial Interface
  • 1.7V to 3.7V Power-Supply Range
  • Available in 8-Pin μMAX® Package

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