High Voltage Forum

General electronics => Electronic circuits => Topic started by: kamelryttarn on July 06, 2018, 09:56:20 AM

Title: Wheatstone bridge and ADC reference voltage
Post by: kamelryttarn on July 06, 2018, 09:56:20 AM
I want to build a kind of digital scale to measure small weight differences and I was wondering why you seldom see circuits where the excitation supply (usually around 10V) isn't fed to the ADC's reference input via a suitable voltage divider? Since the wheatstone bridge is ratiometric, wouldn't this cancel almost all noise on the supply voltage leaving the digital value much more "clean" and accurate?