Description

Two circuits using the LM335 for thermocouple cold-junction compensation have been described. With asingle room temperature calibration these circuits are accurate to ±3/4°C over a 0°C to 70°C temperaturerange using J or K type thermocouples. In addition a thermocouple amplifier using an LM335 for coldjunctioncompensation has been described for which worst case error can be as low as 1°C p