ALB,
Is your EVM a Rev C board? If so I have attached the schematic. Please make sure all jumpers are set per the board photo I am sending. Take a scope probe (diff probe would be better) and monitor the ADC input across R21 and R26. You should see…
Jin,
The schematic looks good for the most part. Please do the following:
1. Install R364 to provide a path to GND.
2. Do not use R361, R362, and R363 wit the ADC_VCM output.
3. Make sure DRVDD and AVDD are 3.3V.
4. Do not need to route ADC_CLKOUTM_F…
Hello Jim,
Apologies for the late reply. I have been traveling and have now just starting to catch up to all the E2E questions.
The revision C of the schematic is attached. The major change on this revision is that we have replaced U15 from a 16-bit…
Couple of quick things Akash,
1. Where is your DC bias current path for the V+ inputs to the op amps?
2. This differential I/O op amp circuit sometimes has a common mode oscillation - probably not here, but we did see that in the OPA838 decomp device…
