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DESCRIPTION
The WM3100 is a high performance stereo 2V
RMS
line driver
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.
WM3100
High Performance Stereo 2Vrms Line Driver
FEATURES
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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
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APPLICATIONS
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Digital televisions
DVD players & recorders
Blu-ray disc players
Gaming consoles
Set-top boxes
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Preliminary Technical Data, October 2010, Rev 2.0
Copyright
©2010
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
