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OPA314: Will this circuit be susceptible to oscillations?
Part Number: OPA314 Other Parts Discussed in Thread: ADS1015,
I have a question on the stability of a design using the OPA314 and ADS1015. There will be a differential signal to the OPA314 inputs, and the output will go to ADS1015.
I ran a quick stability simulation and you should be fine with around 72° of phase margin. The isolation resistor will stabilize your circuit. I do wonder why the customer wants to use such a large load/charge kick back capacitor.
The input impedance of the ADS1015 is not well-defined in the data sheet, but seems inconsequential especially given the load you have placed on the output. I would say, I am not sure if that 12kΩ resistor is actually supposed to be 12.4kΩ. Seems like that is a possible typo.
