A low-power easy-to-calibrate temperature transducer

This paper describes a modified IC temperature transducer with an intrinsic reference whose main features are: easy calibration (in a single step), high sensitivity over a wide temperature range (-4.6 mV//spl deg/C; -50/spl deg/C to +125/spl deg/C), low output impedance (40 /spl Omega/), and low-power dissipation (200 /spl mu/W). The device in which diffused resistors are applied has been fabricated in a conventional IC process. Its application in thermocouple cold-junction compensation is discussed.