The THS4509 can accommodate supply voltages from 3 V to 5 V, either single supply or split supply. Unless the application calls for AC coupling and a very small signal the 5-V supply option must be chosen. In many cases, split supplies are necessary because it is important to have the output common-mode voltage set very close to the midsupply voltage. For example, when driving an ADC with an input common-mode voltage of 1 V the ideal power supply voltage would be +3.5 V and –1.5 V.

Power supply decoupling capacitors must be placed within 2 mm of the amplifier power supply pins. These capacitors must be very low ESR and must have a self resonant frequency above 200 mHz.