Quantization Error With SAR ADC | Cypress Semiconductor
Quantization Error With SAR ADC
I am working on a project used for sampling data and transmitting it through I2C; the transmitting portion is working fine, but I am having issues with the SAR ADC. I am sampling at 700KHz, but even when I am attempting to sample a signal at, say, 1KHz, there seems to be a large quantization error. From my calculation, it seems as though it is only operating with 4-bit resolution, even though I have selected 12 bits. The SAR ADC is also configured as Free-Running, with internal clock and single-ended supply input.
I have attached the picture of the sampled signal at 1KHz. I checked the values of data output by the ADC with the de-bugger, and they are the same as those in the figure shown, although the figure shown is after a wireless-transmission, but that is working correctly, so I believe the error to be with the ADC.
Thank you for your help, and if anything else needs to be uploaded, please let me know.