Here is the statement from the '794362_AA01_Datenblatt_4-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference.pdf' of Ad7124,
When the internal reference is selected, it is internally connected to the modulator. It can also be made available on the REFOUT pin. A 0.1 μF decoupling capacitor is required on REFOUT when the internal reference is active.
But, such a capacitor is missing at REFOUT in the schematic of the product that we are using.
Question to be clarified:
1. Is it mandatory to connect such a capacitor at REFOUT when internal reference voltage used for conversion.?
2. Whether the missing of such capacitor leads to the error in the conversion result for analog inputs that connected to AIN pin.?