使用热电偶测量温度时需要有一个冰点基准.若在热偶回路中插入一个与基准结点的热电势大小相等,但方向相反的电压,则可去掉此基准.AD594/AD595具有这种功能.它的内部具有冰点补偿电路,用来监测基准结点温度,并在内部相加点处增加一个合适的电压到热偶回路之中.净电压被放大后以10mV/℃输出.AD594已经过工厂校准用于J型热偶,而AD595用于K型热偶. A thermocouple temperature measurement requires a freezing point reference, which can be removed by inserting a voltage equal to the thermocouple potential of the reference junction but in the opposite direction in the thermocouple loop. It has a freezing point compensation circuit inside to monitor the temperature of the reference junction and add an appropriate voltage to the thermocouple at the internal point of addition. The net voltage is amplified and output at 10mV / Calibration is for J type thermocouples, while AD595 is for type K thermocouples.