The THS402x devices are designed to operate on power supplies ranging from ±4.5 V to ±16 V (single-ended supplies of 9 V to 32 V). Use a power-supply accuracy of 5% or better. When operated on a board with high-speed digital signals, make sure to provide isolation between digital signal noise and the analog input pins. The THS4021 and THS4022 are connected to the positive power supply (V_CC+) through pin 7 and pin 8, respectively. Both devices use pin 4 for the negative power supply (V_CC–). Decouple each supply pin to GND as close to the device as possible.