Low THD+N Stereo SPDT Switch with Click and Pop Elimination

The NLAS54405 is a single supply, bidirectional, dual single−pole /double−throw (SPDT) ultra-low distortion, high OFF−Isolationanalog switch that can pass analog signals that are positive andnegative with respect to ground. It is primarily targeted at consumerand professional audio switching applications such as computer soundcards and home theater products. The inputs can accommodate groundreferenced signals up to 2.3 VRMS while operating from a single 3.3 Vor 5 V DC supply. The digital logic inputs are 1.8 V logic−compatiblewhen using a single 3.3 V or 5 V supply. It can be used in both AC− orDC−coupled ground-referenced applications.The NLAS54405 has a soft−switch feature and click/pop circuitry ateach signal pin that eliminates clicks and pops associated withpower−up/down conditions of the preceding amplifier outputs.With −116 dB THD+N performance with a 2.3 VRMS signal into20 k load, superior signal muting, high PSRR and very flatfrequency response, the NLAS54405 meets the exacting requirementsof consumer and professional audio engineers.