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Problem with AD7682/AD7689

Question asked by Koder on Jul 27, 2012
Latest reply on Mar 11, 2013 by maithil

Who working with RAC mode in the AD7682/AD7689?

My problem is , that the ADC doesn't want to response right. I made all that are wrote in instuction, but

this method of data transfer (RAC) no correctly. May be there are so little information....I don't know..

I writing the CFG configuration such as 0x39FF after power up.

Farther, I must to hold DIN line in low, that it cans only by sending 0x0000 in CFG without the register overwriting.

As response, ADC must to give me right digital values of signal. Temperature detector was disabled if CFG=0x38FF, but I

receving this value all the time !!!!!!

Settings: WITHOUT A BUSY INDICATOR

              SEQUENCER ENABLED

              SINGLE ENDED CHANNEL FROM IN0 T0 IN3

I think that ADC doesn't understand my CFG configuration. Why?

What is problem ?

Thanks!

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