The input stage of an ADC is a critical circuit to an ADC’s performance. For this reason, some devices include a high-impedance buffer at the ADC inputs to facilitate signal chain design. If an input buffer is not included with your ADC, there are several additional design considerations to make in order to maximize system performance. This video will explain how the input sampling network works inside a delta-sigma modulator and which criteria are most important for the analog front-end.