The MAX9892 is an audio click-and-pop eliminator for portable multimedia devices. It operates from a 1.7V to 3.6V supply, 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 MAX9892 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 MAX9892 can be activated to short the outputs to ground and prevent clicks and pops from pulling current through the headphones. The MAX9892 is available in 6-bump UCSP (1mm x 1.52mm x 0.6mm) and 6-pin µDFN (2mm x 2mm x 0.75mm) packages. The MAX9892 is specified over the -40°C to +85°C temperature range.
The MAX9892 provides click‑and‑pop elimination for portable multimedia devices by shorting headphone outputs to ground during power‑up and power‑down. It features two low‑impedance analog switches controlled by a MUTE pin and an adjustable turn‑off delay via the SET pin.
The device is supplied in 6‑bump UCSP (1 mm × 1.52 mm × 0.6 mm) and 6‑pin UDFN (2 mm × 2 mm × 0.75 mm) packages, operates over –40 °C to +85 °C, and draws less than 1 pA supply current.
| Supply Voltage Range | 1.7 V to 3.6 V |
|---|---|
| Supply Current | < 1 pA |
| Operating Temperature Range | -40 °C to +85 °C |
The MAX9892 operates from 1.7 V to 3.6 V supply.
An external capacitor connected to the SET pin sets the turn‑off delay; the delay equals 0.02 × C (pF) milliseconds.