Q: When using the MAX11169, with the recommended circuit design on the datasheet, the actual voltage on the REF pin was not 4.096V. The voltage was around 0V and unstable. Why did this happen?
A: The MAX11169 component is under shutdown mode when connected to power. CNVST and SCLK pins must be used for it to exit shutdown mode. After that, the part will output internal reference voltage.