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APA2192
Active
Shut Mode Audio Click-and-Pop Eliminator
Features
General Description
The APA2192 is an audio click-and-pop eliminator for portable multimedia devices. Operating from a 1.7V to 3.6V supply, the APA2192 connects to the output of the existing system amplifier and provides a low-impedance path to ground during startup and shutdown. The inputs INL and INR accept voltage swings from VDD to 5.5V below VDD. See the Setting the Supply Voltage section for more information. The power-up and power down transients are shunted to ground to prevent clicks and pops from becoming audible. The APA2192 features two low-impedance analog switches controlled by MUTE that opens and closes the switches. The switches are open during normal operation and have no impact on the output signal. During startup and shutdown of the amplifier, the APA2192 can be activated to short the outputs to ground and prevent clicks and pops from pulling current through the headphones.
Features
- Wide supply voltage range from 1.7V to 3.6V
- Low quiescent current 1µA
- Adjustable turn off time by SET pin
- Fast turn on time: 100us (typ)
- Low switch resistance: 0.3Ω
- Distortion-Free, Click-and-Pop Elimination
- Available in WLCSP1.42x0.92-6 and DFN2x2-6 Packages
- Lead Free Green Devices Available (RoHS Compliant)
General Description
The APA2192 is an audio click-and-pop eliminator for portable multimedia devices. Operating from a 1.7V to 3.6V supply, the APA2192 connects to the output of the existing system amplifier and provides a low-impedance path to ground during startup and shutdown. The inputs INL and INR accept voltage swings from VDD to 5.5V below VDD. See the Setting the Supply Voltage section for more information. The power-up and power down transients are shunted to ground to prevent clicks and pops from becoming audible. The APA2192 features two low-impedance analog switches controlled by MUTE that opens and closes the switches. The switches are open during normal operation and have no impact on the output signal. During startup and shutdown of the amplifier, the APA2192 can be activated to short the outputs to ground and prevent clicks and pops from pulling current through the headphones.
