tom_pay
Member
Hi Everyone,
I have got a PIC which I want to measure a small signal voltage, ranging from 8mV to 180mV, with the ADC function. For simplicity I thought that I should just use a reference voltage of 200mV. However I was not sure weather or not an amplifier, and Vdd as the reference, would better suit the purpose. I would like the end product to be as accurate as possible, however it will receive regular calibration.
So, which would be better, a 200mV ADC reference voltage or an Op-Amp and Vdd as reference?
Thanks in advance,
Tom
I have got a PIC which I want to measure a small signal voltage, ranging from 8mV to 180mV, with the ADC function. For simplicity I thought that I should just use a reference voltage of 200mV. However I was not sure weather or not an amplifier, and Vdd as the reference, would better suit the purpose. I would like the end product to be as accurate as possible, however it will receive regular calibration.
So, which would be better, a 200mV ADC reference voltage or an Op-Amp and Vdd as reference?
Thanks in advance,
Tom