描述
HITACHI LPP100A是日立公司推出的一款工业模块，主要用于温度测量与补偿系统，尤其适用于需要高精度热电偶输入和冷结补偿的场景。以下是其核心功能与技术特点的综合解析：
一、核心功能与定位
冷结补偿技术
通过内置10 kΩNTC（负温度系数）热敏电阻实现冷结补偿，有效修正热电偶输入端的温度偏差，确保温度测量的准确性。
基准电压激励
模块提供基准电压VREF（由AD7124-4芯片的REFOUT输出），并通过串联精密低漂移5.62 kΩ电阻接地，为温度测量电路提供稳定参考电压。
BDD110 HNLP205879R1
BDD110 HNLP205879R1
HITACHI LPP100A is an industrial module launched by Hitachi,mainly used in temperature measurement and compensation systems,especially for scenarios requiring high-precision thermocouple input and cold junction compensation.The following is a comprehensive analysis of its core functions and technical features:
I.Core functions and positioning
Cold junction compensation technology
Cold junction compensation is achieved through a built-in 10 kΩNTC(negative temperature coefficient)thermistor,which effectively corrects the temperature deviation of the thermocouple input and ensures the accuracy of temperature measurement.
Reference voltage excitation
The module provides a reference voltage VREF(output by the REFOUT of the AD7124-4 chip)and is connected to ground through a series precision low-drift 5.62 kΩresistor to provide a stable reference voltage for the temperature measurement circuit.
