emailcausey 0 Posted October 28, 2014 Share Posted October 28, 2014 I am using ADCINA7 (pin J5.3) to measure the voltage from a pressure sensor (after being amplified by an INA333). I have attached 3 pictures. Picture #1: Y axis = voltage (mV), X axis = sample #. Picture #2: Exponential fit of curve from Picture #1 (in excel) Picture #3: Voltage (mV) after the exponential curve is subtracted I am noticing unexpected spikes that are most noticeable in Picture 3. I wish that I had the option of increasing the gain of the INA333, but that is not possible with my application. A former TI employee that I spoke with suggested that I use a 10 bit ADC instead of 12 bit ADC to prevent these spikes from occurring. At the time, this seemed like a great idea but, upon looking into it, I became uncertain if this is a possibility. Also, I am uncertain how to actually change the code so that it only uses a 10 bit ADC. I would appreciate suggestions either to convert the 12 bit ADC to 10 bits or other ideas of how I might remove these spikes. Thanks for the info! Quote Link to post Share on other sites
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