Hi Mark,
Please find the clarifications below, Let me consider the voltage output DAC only
- The FAULT bit for the Vout_A is set, after channel A is enabled
- There is a difference between channelA and the other three channels of the DAC. Channel A has a provision for loopback to be read by the ADC through a switch. In normal case(the case were tests are done) the switchs position will be in such a way that the circuit is similar to other channels. The loopback mode was enabled once, where we saw the ADC reading -10V; then started diagonising for the DAC output keeping the loopback disabled.
- AVCC=5V; AVDD=+15V; AVSS=-15V; DVDD=5V
- We have not tried replacing the IC
- What I meant with AD5755EVM, is the evaluation board of AD5755,ie, EVAL-AD5755xSDZ
Please help us further,
Thanks & Regards,
Dixit