Author Topic: Wheatstone bridge and ADC reference voltage  (Read 50 times)

Offline kamelryttarn

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Wheatstone bridge and ADC reference voltage
« 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?

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Wheatstone bridge and ADC reference voltage
« on: July 06, 2018, 09:56:20 AM »

 


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