Thank you very much for your support.
The thread that you introduced say
>The AD7656A and AD7656A-1 have incorporated the external schottky diodes required on the AD7656 and AD7656-1 when application of VDD and VSS before analog inputs cannot…
Did you give the part a reset after powerup? Can I have a look at your schematics?
Dear ADI Technical Support,
We are designing a buffer to drive the analog inputs of AD7656A-1 (250ksps, 6-channel, simultaneous sampling, bipolar, 16-bit ADC). And we have following questions regarding its analog inputs.
1. What's the input resistance…
Both devices are pin-for-pin and software compatible. The AD7656A-1 offers reduced decoupling requirements and improved power supply sequencing.
I have problems with AD7656A. It is connected in hardware mode, with internal reference, VDD/Vss +/-6V, input +/-5.0V max., input channels V1-V6, no STANDBY, CONVSTA+CONVSTB+CONSTSTC tight together, SPI interface, no daisy chaining.…