Insight

ADC Input and Anti-Aliasing: Inputs to Organise Before Sampling

ADI-source-based relationships among input band, sample rate, filtering and ADC drive.

Details

Start with the signal band

ADI anti-aliasing guidance notes that signals outside the target Nyquist bandwidth can fold back into the band of interest, so input band, sample rate and filter target need to be defined together.

Items to confirm

Signal bandwidth, sample rate and allowed spectrum
Input amplitude, offset, source impedance and common-mode condition
Filter, driver, reference and grounding constraints

Handoff suggestion

Keep sensor or source information, ADC data-sheet requirements and intended processing method in one input package instead of beginning from a single range value.

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