Hello everyone,
I seem to be having a brain-fart today. So, I have a resistor divider circuit, R1, R2, where R1 is the top resistor, connected to signal in and R2 is the bottom resistor, connected to ground . The output will go to a ADC. The frequency of the waveform going into the ADC (signal out) needs to be 1/5th that of the sampling frequency (specified in the datasheet). I am creating a low pass filter on signal out by connecting a capacitor (C1) to ground.
My question is this, for the RC time constant, will it be R1 * C1 or R2*C2?
I seem to be having a brain-fart today. So, I have a resistor divider circuit, R1, R2, where R1 is the top resistor, connected to signal in and R2 is the bottom resistor, connected to ground . The output will go to a ADC. The frequency of the waveform going into the ADC (signal out) needs to be 1/5th that of the sampling frequency (specified in the datasheet). I am creating a low pass filter on signal out by connecting a capacitor (C1) to ground.
My question is this, for the RC time constant, will it be R1 * C1 or R2*C2?