Analog Devices / Maxim Integrated MAX31865 RTD至数字转换器

Maxim MAX31865是简单易用的热敏电阻至数字转换器，优化用于铂电阻温度传感器(RTD)。外部电阻设置在用RTD的灵敏度，高精度西格玛-德尔塔 ADC将RTD电阻与参考阻值之比转换成数字输出。MAX31865输入具有高达±±50V的过压保护。提供可配置的RTD及电缆开路/短路条件检测。

特性

  • Simple conversion of platinum RTD resistance to digital value
  • Handles 100Ω to 1kΩ (at 0°C) platinum RTDs (PT100 to PT1000)
  • Compatible with 2-, 3-, and 4-wire sensor connections
  • 21ms maximum conversion time
  • 15-Bit ADC resolution; nominal temperature resolution 0.03125°C (varies due to RTD nonlinearity)
  • Total accuracy over all operating conditions: 0.5°C (0.05% of Full Scale) max
  • ±50V input protection
  • Fully differential VREF inputs
  • Fault detection (open RTD element, RTD shorted to out-of-range voltage, or short across RTD element)
  • SPI-compatible interface
  • 20-pin TQFN package

应用

  • Industrial equipment
  • Instrumentation
  • Medical equipment

Application Circuit

应用电路图 - Analog Devices / Maxim Integrated MAX31865 RTD至数字转换器
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