SBAS301D October 2003 – February 2020 ADS1204
PRODUCTION DATA.
Good decoupling practices must be used for the ADS1204 and for all components in the design. All decoupling capacitors, specifically the 0.1-µF ceramic capacitors, must be placed as close as possible to the pin being decoupled. A 1-µF and 10-µF capacitor, in parallel with the 0.1-µF ceramic capacitor, can be used to decouple AVDD to AGND as well as BVDD to BGND. At least one 0.1-µF ceramic capacitor must be used to decouple every AVDD to AGND and BVDD to BGND, as well as for the digital supply on each digital component.
In cases where both the analog and digital I/O supplies share the same supply source, an RC filter of 10 Ω and 0.1 µF can be used to help reduce the noise in the analog supply.