Part Number:OPA189
I'm looking into using the OPA189 for a transimpedance amplifier application. I'm comparing it to the OPA277 (which is what the design uses now). Looking at the specs, it seems like a great fit.
I wonder if the zero-drift / chopper architecture is recommended for TIA. The literature says that the switching results in current pulses / charge injection. And since the TIA will have a high value resistor (100k-1M), it seems like these charge injections might end up being noticeable in this application. Please advise.
Also, the chopper frequency is not listed in the datasheet, (although the datasheet does recommend using a passive LPF at the output. What's the frequency range of the chopper?