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WM3100

High Performance Stereo 2Vrms Line Driver

WOLFSON MICROELECTRONICS plc

Preliminary Technical Data, October 2010, Rev 2.0

Copyright

©2010 Wolfson Microelectronics plc

DESCRIPTION

with ground referenced outputs.

The device is ideal for cost-sensitive applications requiring line

level outputs, minimal external components and small PCB

area. The WM3100 offers excellent audio performance.

The two high performance amplifiers are capable of driving a

wide variety of loads. The device supports single-ended or

differential input configurations. The input and feedback

resisitors around both amplifiers are integrated within the

WM3100, giving a high impedance input and a fixed signal gain

of +6.4dB.

An on-board charge pump is provided to generate the negative

supply for the ground-referenced drivers; the charge pump

requires only two external capacitors for normal operation.

The line outputs can be muted using a hardware control input. A

high impedance mute state is also supported, where the outputs

are undriven - this is useful in applications where a common

external connector is used as an input and an output.

The device uses a single 3.3V supply, and is available in a 14-

pin SOIC.

FEATURES

•

108dB SNR (‘A’ weighted)

•

-95dB THD+N

•

108dB dynamic range

•

Single-ended or differential input

•

Fixed gain +6.4dB

•

Digital control inputs

-

Mute pin

-

High impedance output mode

•

Pop and click suppression

•

Fast start-up

-

200μs start-up from OFF

-

100μs start-up from MUTE

•

3.3V supply

•

14-pin SOIC

APPLICATIONS

•

Digital televisions

•

DVD players & recorders

•

Blu-ray disc players

•

Gaming consoles

•

Set-top boxes

BLOCK DIAGRAM