Smart Temperature Sensor with Integrated Bitstream Calibration
Gert Horn, Johan H. Huijsing · 1995
A novel sensor calibration technique has been applied for temperature measurements with an inaccuracy of 0.1% of the full scale. A PTAT and bandgap reference circuit and a sigma-delta AD converter have been integrated on the same chip together with digital calibration circuitry. The digital output can be calibrated for offset, gain, and 2nd-order non-linearity errors for an arbitrary temperature range in between ?40°C and 125°C.