CCS/MSP432P401R: The question of analog input of MSP432P401R's ADC14.

Yu-Hung

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Hello,

I would like to use ADC14 inside the MSP432P401R launchpad to measure the wind sensor in very low sampling rate. (<10Hz)

Is it necessary to use voltage follower and anti-aliasing filter?

The output impedance of the sensor is approximately 50~150 ohm.

PS. where can I find the input impedance of ADC14 of MSP432P401R.

Regards,

YHH

0 FI over 6 years ago

Hi,

I think you can use a simple RC circuit as an AA filter in front of the ADC input.

For input impedance see this:

Thanks

0 Yu-Hung over 6 years ago in reply to FI

Expert 1130 points

Dear,

Thank you for your kind assistance.

I will try to use a cutoff frequency fc=1Hz RC low-pass filter.

Hope it can work when the resistor(R=15Kohm) and capacitor(C=10uF).

I worry about the value is too large.

Regards,

YHH

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