ADC problems | Cypress Semiconductor
I'm using the FirstTouch PSoC 3 kit. I have a 1.5V peak - to - peak 40kHz signal coming into my ADC, and i've offset this signal by 1.5V so that it lies between 0 and 3 V. I'm sampling this signal at 30kHz (subsampling). I've set up the ADC in 8 bit Single mode, running between Vssa and Vdda.
My problem is that the received ADC value should be varying between 0 and somewhere close to 255, but actually varies between 125 and 126 ( the centre line). What could the problem be?