Noisy Differential Preamp into SAR ADC | Cypress Semiconductor
Noisy Differential Preamp into SAR ADC
Once I realized that I hadn't blown my opamps, I resumed work on my load cell project - schematic attached. I am reading voltage values that make some sense in the context (e.g. values get proportionaly larger when more weight is placed on the cell), but the signal coming off the differential preamp is swinging wildy in value. The SAR readings are therefore swinging wildly too, sometimes even more so than their analog counterparts.
I'm too delirious to ask a more detailed question or do other research at this exact point, but since this is for a project on a tight deadline, I thought I'd at least get the conversation started.