GENERAL DESCRIPTION

The SGM4807 is an audio click-pop eliminator which

can operate from a 1.7V to 5V single power supply. It is

designed for portable devices.

The SGM4807 provides a low-impedance grounding

path during startup and shutdown by connecting to the

output of the system amplifier. It allows -VCC to +VCC

wide range audio signals passing with low distortion.

Shunt mode can eliminate the click-pop noise.

The SGM4807 has two low-impedance analog

switches. The opening and closing of the switches are

controlled by mute events that include external power

supply and under-voltage of VCC, power-up,

power-down and high to low logical level change of

MUTE pin. Opening switches during normal operation

will not affect the output signal.

The SGM4807 can be activated during startup and

shutdown of the amplifier to short-circuit the output to

the ground and reduce clicks-pops.

The SGM4807 is available in Green TDFN-2×2-8L,

MSOP-8 and WLCSP-1.57×0.80-8B packages. It

operates over an ambient temperature range of -40℃

to +85℃.

FEATURES

? Supply Voltage Range: 1.7V to 5V

? Pop/Click Reduction Circuitry

? Supply Current: 1.5μA (TYP)

? 600kΩ Pull-Low Resistor at MUTE Pin

? -40℃ to +85℃ Operating Temperature Range

? Available in Green TDFN-2×2-8L, MSOP-8 and

WLCSP-1.57×0.80-8B Packages

APPLICATIONS

Notebook Computers

Phones

Portable Equipment