JAJSGG2C October 2018 – June 2019 ADS125H02
A high dV/dt signal at the ADC input can lead to transient turn-on of the PGA inverse-parallel protection diodes (see Figure 57 for details). Turn-on of the PGA diodes can result in current flow in the analog inputs that can cause a disturbance in the measurement channel. For example, a high dV/dt voltage can be generated at the output of a signal multiplexer after a channel selection, leading to a possible flow of transient currents through the ADC inputs. Filter the ADC input voltage to limit the rate of voltage change (dV/dt).