Do I need a reference buffer to drive an ADC?

Question

ArtKalb · Accepted Answer

Most references will need a reference buffer to drive an ADC. The reference buffer provides a low-impedance output that improves load regulation (the change in output voltage with load current). A reference buffer will also assist in medium-frequency transient load demands. High-frequency load transients can generally only be supplied with large external capacitors. Some reference ICs include an integrated buffer. This buffer is a general-purpose buffer and may not be adequate to drive a specific ADC. Some ADCs, have internal buffering or features that may allow them to be driven directly by a reference or a reference with an integrated buffer (e.g. AD4134). Usually the ADC datasheet will give recommended connections and suggested components for the reference inputs.)

Electronic Design Services - PartnerZone

Do I need a reference buffer to drive an ADC?

Top Replies