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MAX14777 charge pumps capacitors

Category: Hardware
Product Number: MAX14777


We are using the MAX14777 Quad Analog Switch as a gain selector on an opamp. The MAX14777 is causing some noise bumps at 7 kHz and harmonics (around -124 dBV). I assume this is the charge pump switching frequency. The datasheet recommends 10nF capacitors on the VP and VN charge pumps outputs. I tried 100nF capacitors and all that noise is gone. There is almost a 20dB improvement on the noise floor. Is it ok to use bigger capacitors on those pins?



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[edited by: emassa at 6:36 PM (GMT -5) on 27 Jan 2023]
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