Hello,
As I read the datasheet of the ADS 1299 for the decoupling capacitors, I find that it is much confusing.
I am using the device with Bipolar Power Supply, +2.5V and -2.5V.
DATASHEET - SECTION 6
- no mention about 0.1uF capacitors.
- no difference between unipolar or bipolar supply.
DATASHEET - SECTION 11
"Bypass each device supply with10-μF and 0.1-μF solid ceramic capacitors."
Bypass AVDD to GND or AVSS ?
DATASHEET - SECTION 11.3 (BIPOLAR OPERATION)
- No specific decoupling from AVDD to AVSS ?
- No need for specific decoupling capacitor on AVDD1 ?
EVALUATION MODULE - SCHEMATIC
- A bunch of decoupling capacitor, but we don't see where they are really used.
- Some AVDD to AGND, some AVDD to AVSS, ... do they all go on the ADS1299 or some are for the op-amp on the same page ?
CONCLUSION
So, 4 different places for information, but not always clear.
What is the correct information ?
Thank you
