Hello.
I am developing a product using the ADS122C04 device.
I would like to use the "System Monitor" function to implement the self-diagnosis function.
I have set up the internal multiplexer to measure analog power supplyy (MUX[3:0] = 1101, 3.3V) and an external reference voltage source (MUX[3:0] = 1100, 3.0V).
The manual (ads122c04.pdf, page.29, 8.3.9 System Monitor) says that it is automatically converted to internal reference when using the monitoring function, but it does not work well when measuring an external reference voltage source.
When measuring an external reference voltage source, if the reference source is set as an external reference, it will be read correctly.
Please confirm.
thank you.