WM8951L Datasheet, PDF (1/42 Pages) Wolfson Microelectronics plc – STEREO ADC WITH MICROPHONE INPUT AND CLOCK GENERATOR

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WM8951L
Stereo ADC with Microphone Input and Clock Generator
DESCRIPTION
The WM8951L is a low power stereo ADC with an
integrated microphone interface and crystal oscillator for
clock generation. The WM8951L is ideal for voice recorders,
wireless microphones and games console accessories.
Stereo line and mono microphone level audio inputs are
provided, along with a mute function, programmable line
level volume control and a bias voltage output suitable for
an electret type microphone.
Stereo 24-bit multi-bit sigma delta ADCs are used with
oversampling decimation filters. Digital audio input word
lengths from 16-32 bits and sampling rates from 8kHz to
96kHz are supported.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including
volume controls, mutes and extensive power management
facilities. The device is available in a small 28 lead 5x5mm
quad flat leadless package (QFN).
BLOCK DIAGRAM
FEATURES
• Audio Performance
- ADC SNR 90dB (‘A’ weighted) at 3.3V, 85dB at 1.8V
- Low Power
- 1.42 – 3.6V Digital Supply Operation
- 1.8 – 3.6V Analogue Supply Operation
• Sampling Frequency: 8kHz – 96kHz
• Selectable ADC High Pass Filter
• 2 or 3-Wire MPU Serial Control Interface
• Programmable Audio Data Interface Modes
- I²S, Left, Right Justified or DSP
- 16/20/24/32 bit Word Lengths
- Master or Slave Clocking Mode
• Microphone Input and Electret Bias with Side Tone Mixer
• Available in 5x5mm 28-pin QFN package
APPLICATIONS
• Wireless microphones
• Voice recorders
• Games console accessories
WOLFSON MICROELECTRONICS plc
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Production Data, May 2005, Rev 4.0
Copyright 2005 Wolfson Microelectronics plc