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AD5292 SDO Readback mode

Question asked by jpalleyne27 on Feb 24, 2014
Latest reply on Feb 26, 2014 by msamera

Hello,

I have a circuit containing two digital potentiometers (AD5292) that are part of a voltage regulator circuit. I'm trying to send the wiper words back to the microcontroller via the SDO pin in readback mode. The SDO pins of both DP's are connected to the microcontroller's MISO (master in slave out) pin. When it is connected in this way, the readback is "lost" somewhere along the way. However, when I disconnect one of the connections to one of the potentiometers, the potentiometer that is still connected is able to send back its word to the microcontroller (I verify this using LED's). I can't figure out the issue.

 

Thank you,

JP

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