Original question:
ADC12DJ3200EVM: Channel B as input for single mode possible?
Hi,
I am using the ADC12DJ3200 ADC in dual mode. For some reason if I connect the same signal source on Channel B as in Channel A with no change in settings, I see a larger gain on Channel B. This makes no sense to me. I tried checking for settings in ADC but both channels seem to have the same settings. The ADC is set to JMODE 2 and clock rate is 983.04MHz
Hello Sai
I don't expect this behavior is due to the ADC.
There may be some issue with the signal path from VINA and VINB input connectors to the ADC inputs.
Please check the soldered connections of J2 and J5, BALUN1 and BALUN2 and on the resistors R1, R4, R6 and R9 which connect the balun outputs to the ADC inputs. If there is a bad solder joint on one of the connections that would explain the problem. If this is the case you may be able to correct the problem by carefully re-soldering that connection.
Best regards,
Jim B
