System and methods for configurable input channel multiplexing

A multi-channel ADC system comprising:

• a configuration setting to configure a plurality of input signals in one of a plurality of configurations, the configuration setting comprising a 2-bit register value;
• a multiplexer coupled to the plurality of input signals, the multiplexer to couple at least one of the plurality of input signals to at least one multiplexer output channel based on the configuration setting;
• an analog-to-digital converter (ADC);
• and
• a control circuit comprising:
• at least one switch to selectively couple at least one multiplexer output channel to at least one multiplexer output pin;
• a conditioning circuit with an input coupled to at least one multiplexer output pin and an output coupled to an ADC input pin;
• and
• the ADC input pin coupled to an input of the ADC,
• wherein the control circuit to couple the at least one multiplexer output channel to the ADC, the ADC to convert the at least one multiplexer output channel.