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
发布日期: 2014-02-11
| 更新日期: 2023-04-11