Maxim Integrated Products’ MAX4901-MAX4905 family of dual SPST and single SPDT analog switches can handle negative signals with a single positive power supply, thereby reducing external component count and improving audio signal quality.

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This family features integrated shunt switches to ground, which reduces audio popping and clicking sounds by depleting the capacitive charge, which commonly builds up on the unconnected port of the switch, to ground. In addition, an extremely low 0.6-Ohm on-resistance, a low 0.25 Ohm on-resistance flatness, and a low 0.04% total harmonic distortion yield excellent audio signal quality. An integrated comparator (MAX4905) gives the user mute and headphone-detection functionality, normally implemented with external components.

The MAX4901-MAX4905 are available in the extended temperature range (-40°C to +85°C) and in both a tiny 9-bump UCSP (1.5 mm x 1.5 mm) and an 8-pin TDFN package (3 mm x 3 mm). Prices start at $1 (1000-up, FOB USA).