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7/5/2025, 12:37:56 PM
>>2929143
i don't know how much noise there will be but it's strongly suggested to use at least a 100nF ceramic per supply pin as close as possible to the op-amp because of noise that gets picked up via the PCB traces. the AI did suggest values of up to 10uF (polypropylene film caps) paralleled with a smaller ceramic but 10uF isn't a practical size for polypropylene film caps. 470nF is slightly bigger than its initial suggestion of 330nF (when it assumed 1MHz PSRR dip) or 100-150nF (with 2.5MHz PSRR dip) but it seems to approve of the 470nF polypropylene + 10nF ceramic solution, even when trying different assumptions like 20nH ESL with 1.6MHz resonance frequencies for the 470nF polypropylene cap, paralleling with 6.8nf or 22nF ceramic etc.
i don't know how much noise there will be but it's strongly suggested to use at least a 100nF ceramic per supply pin as close as possible to the op-amp because of noise that gets picked up via the PCB traces. the AI did suggest values of up to 10uF (polypropylene film caps) paralleled with a smaller ceramic but 10uF isn't a practical size for polypropylene film caps. 470nF is slightly bigger than its initial suggestion of 330nF (when it assumed 1MHz PSRR dip) or 100-150nF (with 2.5MHz PSRR dip) but it seems to approve of the 470nF polypropylene + 10nF ceramic solution, even when trying different assumptions like 20nH ESL with 1.6MHz resonance frequencies for the 470nF polypropylene cap, paralleling with 6.8nf or 22nF ceramic etc.
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