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Forum Post: DDC114: Anti-aliasing Filter

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Part Number: DDC114 Hi Team, Is an anti-alias filter necessary for the DDC114 in the case of frequencies above the Nyquist limit? I assume with a max sample rate of 3.125khz that if there are faster signals they will fold down and alias. Correct? Do you have any suggestions for an anti-alias filter for a photodiode that normally might be connected direct to the DDC114 ? The issue my customer and I are struggling with is that it is charge integrating, and the amount of charge is so small, we are concerned about putting anything additionally in the signal chain. Not sure about filtering the current vs voltage if this was a standard ADC. Thanks, Mitchell

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