I'm trying to use AD7656 for Analog conversion, controlled by a microcontroller. I have used the circuit recommended on page 22 of the datasheet for a parallel conversion with external reference, but it doesn't work. I checked the different inputs, CS et RD and CONVABC (they are all used together) and they are like indicated by datasheet. On the other hand, signal BUSY doesn't appear at all and there is no digital output at all. Do you hqve any idea where my problem could be?
I would be very thankful if you can help me to solve this problem.