Analog Devices / Maxim Integrated MAX31856 热电偶到数字转换器
Maxim MAX31856 精密热电偶至数字转换器可对来自于任何类型热电偶的信号进行冷端补偿和数字化。将输出数据格式化为以摄氏度为单位。转换器的温度分辨率达 0.0078125°C，允许读取高达 +1800°C 以及低至 -210°C（取决于热电偶类型）的温度读数。MAX31856 的热电偶电压测量精度达 ±0.15%。热电偶输入具有高达 ±45V 的过压保护。查找表 (LUT) 储存多种类型热电偶（K、J、N、R、S、T、E和B）的线性度修正数据。器件包括 50Hz 和 60Hz 电网频率滤波，也是热电偶的故障检测频率。SPI 兼容接口允许选择热电偶类型以及设置转换和故障检测过程。
The Analog Devices MAX31856 Thermocouple to Digital Converter is available in a TSSOP-14 package with a -55°C to +125°C operating temperature range.
特性
- Provides high-accuracy thermocouple temperature readings
- Includes automatic linearization correction for 8 thermocouple types
- ±0.15% (max, -20°C to +85°C) thermocouple full-scale and linearity error
- 19-bit, 0.0078125°C thermocouple temperature resolution
- Internal cold-junction compensation minimizes system components
- ±0.7°C (max, -20°C to +85°C) cold-junction accuracy
- ±45V input protection provides robust system performance
- Simplifies system fault management and troubleshooting
- Detects open thermocouples
- Over- and under-temperature fault detection
- 50Hz/60Hz noise rejection filtering improves system performance
- TSSOP-14 package
应用
- Industrial equipment
- Industrial Ovens, furnaces, and environmental chamber
- Temperature controllers
视频
Block Diagram
发布日期: 2016-02-17
| 更新日期: 2025-10-29