Electronic – Decoupling capacitors for ADC

decoupling-capacitortexas instruments

I have this ADS6125 adc. In the datasheet it is written that this ADC uses internal decoupling:

  1. "capacitors on-chip eliminates the need for external decoupling" (p.45)
  2. "As ADS612X already includes internal decoupling, minimal external decoupling can be used without loss in performance" (p.55)

It says minimal decoupling is enough. But what is minimal?

In my design I am using 3 decoupling caps for each supply pin. Could I get in trouble for using too many decoupling caps?

ADS6125 datasheet:
https://www.ti.com/lit/ds/symlink/ads6125.pdf?ts=1603138441413&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FADS6125

Best Answer

The ADS6125 has an Evaluation Module (EVM), here: https://www.ti.com/tool/ADS6125EVM

This includes a schematic, including recommended bypassing. TI is good like that.

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