The analog-to-digital converter (ADC) is a key module used to sense feedback and monitor signals in real-time control applications. Without careful design and evaluation of the reference circuits for the ADC, however, significant AC and linear errors can occur, resulting in poor performance of the ADC sensing and thus the system. This application note identifies some common sources of these errors, and provides topologies that can be used in designs for C2000™ real-time microcontrollers.