The DIO1505 is a high-performance single-pole single-throw (SPST) depletion switch. Depletion technology enables the device to conduct signals in the absence of VDD and to isolate signals in the presence of VDD. The DIO1505 can pass or isolate negative signal fluctuations as low as -3.0 V and is 5.5 V tolerable. The DIO1505's depletion gate control enables it to achieve exceptional THD+N performance while using very little power during signal conduction.