JAJSGG2C October 2018 – June 2019 ADS125H02
ESD diodes are incorporated to protect the ADC inputs from possible ESD events occurring during the manufacturing process and during printed circuit board (PCB) assembly when manufactured in an ESD-controlled environment. For system-level ESD protection, consider the use of external ESD protection devices for pins that are exposed to possible ESD, including the analog inputs.
If an analog input is driven below HV_AVSS – 0.3 V, or above HV_AVDD + 0.3 V, the internal ESD protection diodes can conduct. If this condition is possible, current can flow through the inputs and flow out from the HV_AVDD or HV_AVSS pins. Use external clamp diodes, series resistors, or both to limit the input current to the specified value (see the PGA Operating Range section for details).