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Wolfson Microelectronics - AC 97 Audio CODEC

Numéro de référence WM9714L
Description AC 97 Audio CODEC
Fabricant Wolfson Microelectronics 
Logo Wolfson Microelectronics 





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WM9714L fiche technique
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AC’97 Audio CODEC
WM9714L
DESCRIPTION
FEATURES
The WM9714L is a highly integrated input/output device
designed for mobile computing and communications.
The chip is architected for dual CODEC operation, supporting
Hi-Fi stereo Codec functions via the AC link interface, and
additionally supporting voice Codec functions via a PCM type
Synchronous Serial Port (SSP). A third, auxiliary DAC is
provided which may be used to support generation of
supervisory tones, or ring-tones at different sample rates to the
main codec.
AC’97 Rev 2.2 compatible stereo codec
- DAC SNR 94dB, THD –85dB
- ADC SNR 87dB, THD –86dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
On-chip 45mW headphone driver
On-chip 400mW mono or stereo speaker drivers
Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
- Mic insert and mic button press detection
The device can connect directly to mono or stereo
microphones, stereo headphones and a stereo speaker,
reducing total component count in the system. Cap-less
connections to the headphones, speakers, and earpiece may be
used, saving cost and board area. Additionally, multiple analog
input and output pins are provided for seamless integration with
analog connected wireless communication devices.
Auxiliary mono DAC (ring tone or DC level generation)
Seamless interface to wireless chipset
Additional PCM/I2S interface to support voice CODEC
PLL derived audio clocks.
Supports input clock ranging from 2.048MHz to 78.6MHz
1.8V to 3.6V supplies (digital down to 1.62V, speaker up to
4.2V)
7x7mm 48-lead QFN package
All device functions are accessed and controlled through a
single AC-Link interface compliant with the AC’97 standard. APPLICATIONS
The 24.576 MHz masterclock can be input directly or generated
internally from a 13MHz (or other frequency) clock by an on-chip Personal Digital Assistants (PDA) with or without phone
PLL. The PLL supports a wide range of input clock from Smartphones
2.048MHz to 78.6MHz.
www.DataSheet4UH.coamndheld and Tablet Computers
The WM9714L operates at supply voltages from 1.8V to 3.6V.
Each section of the chip can be powered down under software
control to save power. The device is available in a small
leadless 7x7mm QFN package, ideal for use in hand-held
portable systems.
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Pre-Production, June 2006, Rev 3.0
Copyright 2006 Wolfson Microelectronics plc

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