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Wolfson Microelectronics - Mobile Multimedia CODEC

Numéro de référence WM8991
Description Mobile Multimedia CODEC
Fabricant Wolfson Microelectronics 
Logo Wolfson Microelectronics 





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WM8991 fiche technique
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WM8991
Mobile Multimedia CODEC with
Dual-Mode Class AB/D Speaker Driver
DESCRIPTION
FEATURES
The WM8991 is a highly integrated ultra-low power hi-fi codec
designed for handsets rich in multimedia features such as
mobile TV, digital audio playback and gaming. Ultra-low power
and low noise interfaces to many other audio components in the
system are provided.
A powerful 1W speaker driver can operate in class D or AB
modes, providing total flexibility to the system designer. Low
leakage, high PSRR and pop/click suppression enable direct
battery connection for the speaker supply.
A very highly flexible input configuration supports multiple
microphone or line inputs (mono or stereo, single-ended or
differential).
Four headphone drivers support fully differential headset drive,
providing excellent crosstalk performance and bass response,
maximising stereo effects, and allowing the removal of large
and expensive headphone capacitors.
Stereo 24-bit sigma-delta ADCs and DACs provide hi-fi quality
audio record and playback, with a flexible digital audio interface
supporting most commonly-used clocking schemes. An
integrated low power PLL, an alternative DAC interface and
TDM support provide additional flexibility.
The WM8991 is supplied in very small and thin 5x5mm 65-ball
BGA package, ideal for use in portable systems.
DAC SNR 99dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
ADC SNR 94dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
Microphone interface (Up to four differential microphones)
1W Speaker driver
- 1W into 8BTL speaker at <0.1% THD
- 80dB PSRR @217Hz
- <1uA leakage with direct battery connection
- Software-selectable class D or AB mode
- Filterless connection supported
- Pop/Click suppression
Headphone / ear speaker drivers
- 40mW output power into 16at 3.3V
- Fully differential and capless modes supported
- Pop/Click suppression
4 Mono or stereo differential line outputs
Powerful GPIO functions
Ultra-low power consumption
- 8.3mW analogue voice call
- 13.7mW DAC playback to headphones
On-chip PLL provides flexible clocking scheme
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
65-ball 5x5mm BGA package
APPLICATIONS
Multimedia phones
GPS
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Pre-Production, May 2008, Rev 3.1
Copyright ©2008 Wolfson Microelectronics plc

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