Other Parts Discussed in Thread: OPA2333,
My customer is driving the MON1 pin with an op-amp at 0.56V. It is an OPA2333 micropower op amp. They are seeing a noise transient on the op-amp output (MON1 pin) at around 100mV with a frequency of ~130KHz. They are using MON1-7, MON8-11 are unused. There is no external capacitance on the MON1 pin to GND. Feedback resistance around the op-amp is 10K ohms.
Is it possible that the internal UCD9090A MUX is introducing this noise on the MON1 pin? Any other thoughts about what might be causing this- it does not correlate to anything in or around the op-amp. Everything is very clean.
Thanks, Mark