neoflash
Advanced Member level 1

I am designing a high accuracy temperature sensor on 130nm CMOS process. Supply voltage is about 1.5v.
Sensor need to be within +/- 2 degree accuracy, from 0 ~ 125 degree.
My difficulty is that bandgap voltage reference itself is very hard to be controlled within 3%. How can we measure temperature by so coarse ruler?
Any suggestion engineering wise?
thanks,
Neoflash
Sensor need to be within +/- 2 degree accuracy, from 0 ~ 125 degree.
My difficulty is that bandgap voltage reference itself is very hard to be controlled within 3%. How can we measure temperature by so coarse ruler?
Any suggestion engineering wise?
thanks,
Neoflash