The Intersil ISL54405 is a single-power, bi-directional, double-single-pole/double-throw (SPDT) ultra-low distortion, high-disconnect isolation analog switch that delivers both positive and negative analog signals relative to ground. It is aimed primarily at consumer and professional audio switching applications such as computer sound cards and home theater products. Inputs can accommodate up to 2VRMS of ground reference signals while operating from a single 3.3V or 5V DC power supply.
When using a single 3.3V or 5V power supply, the digital logic input is 1.8V logically compatible. It can be used for AC or DC coupled ground reference applications. The ISL54405 features a soft switching feature and a click/pop circuit for each signal pin, eliminating the click and pop associated with the power on/power off conditions of the previous amplifier output.
ISL54405 has - 106 db THD + N, 2 VRMS signal can be converted into 20 kΩ load, superior signal muting, very flat frequency response, high PSRR and meet the strict requirements of consumer and professional audio engineers. The ISL54405 is available in a 16 Ld TSSOP, 16 Ld 3mmx3mm TQFN, and 16 Ld 2.6mmx1.8mmµTQFN package. It is suitable for temperatures ranging from -40°C to +85°C.
Sound card AC coupled application block diagram