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DESCRIPTION
The WM9711L is a highly integrated input / output device
designed for mobile computing and communications. The
device can connect directly to mono or stereo microphones,
stereo headphones and a mono speaker, reducing total
component count in the system. Additionally, phone input
and output pins are provided for seamless integration with
wireless communication devices.
The WM9711L also offers five GPIO pins for interfacing to
buttons or other digital devices. To monitor the battery
voltage in portable systems, the WM9711L has two
uncommitted comparator inputs.
All device functions are accessed and controlled through a
single AC-Link interface compliant with the AC’97 standard.
Additionally, the WM9711L can generate interrupts to
indicate low battery, dead battery, thermal cut-out and GPIO
conditions.
The WM9711L operates at supply voltages from 1.8 to 3.6
Volts. 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, or in the industry standard 48-pin
TQFP package.
WM9711L
Low Power Audio CODEC for Portable Applications
FEATURES
•
AC’97 Rev 2.2 compatible stereo codec
- DAC SNR 94dB, THD –87dB
- ADC SNR 92dB, THD –87dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
•
On-chip 45mW headphone driver
•
On-chip 400mW mono speaker driver
•
Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
•
Auxiliary mono DAC (ring tone or DC level generation)
•
Seamless interface to wireless chipset
•
Up to 5 GPIO pins
•
2 comparator inputs for battery monitoring
•
1.8V to 3.6V supplies
•
7x7mm QFN or 48-pin TQFP package options
APPLICATIONS
•
Personal Digital Assistants (PDA)
•
Smartphones
•
Handheld and Tablet Computers
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Production Data, April 2004, Rev 4.1
Copyright
2004
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
