Scan rate capability of 48-channel ADC board (ZAD1248PROXR_USB)

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1

Hi,

If I am using the USB interface with the ZAD1248PROXR_USB, how quickly can I sample and return voltage measurements for all 48 channels? Is the bottleneck at the ADC, analog switch, or serial interface to the USB?

Thank you,
Brian

2

You should be able to sample and return the measurements from a single command roughly every 25ms for 12-bit readings or 20ms for 8-bit readings.

Since you’re reading 48 channels and the board will only return 16 channels worth of readings at a time you’ll need to send 3 commands to read all channels so approximately 60-75 milliseconds per full sample.

The bottleneck is in the serial interface to the board.

3

Very helpful. Thank you!