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EVAL-AD7172-4SDZ: problems in configuring IFMODE register for Contitnuous Read mode

Question asked by calyff on Oct 24, 2016
Latest reply on Oct 24, 2016 by rcalam

I've connected the EVAL-AD7172-4SDZ to my Windows PC through the EVAL-SDP-CB1Z board. Then I'm trying to chenage the values into the ADC registers by using the AD software. I'm having problems in configuring the IFMODE registert. All the others work correctly.

Everytime I try to set the CONT_READ bit it messes it up, chaning all the other parameters and keeping CONT_READ low.

I want to test the AD7172-4 with three single-ended active channels, working at 32 kS/s, but what I see is a maximum of 6.2 kS/s (not per channel): I recieve channel 1, and after 162 us (6.2 kHz) I recieve channel 2, and other 162 us are required for channel 3. I was expecting 162 us to recieve channel 1 again!

Can anyone help me?

 

Renato

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