WM8983
w
Mobile Multimedia CODEC with 1W Speaker Driver
DESCRIPTION
FEATURES
Stereo CODEC:
The WM8983 is a low power, high quality stereo CODEC
designed for portable multimedia applications. Highly flexible
analogue mixing functions enable new application features,
combining hi-fi quality audio with voice communication.
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DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
ADC SNR 95dB, THD -84dB (‘A’ weighted @ 48kHz)
Speaker driver (1W into 8Ω BTL with 5V supply)
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SNR 90dB
The device integrates preamps for stereo differential mics, and
includes drivers for speaker, headphone and differential or stereo
line output. External component requirements are reduced as no
separate microphone or headphone amplifiers are required.
PSRR 80dB
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Headphone driver with ‘capless’ option
40mW/channel output power into 16Ω / 3.3V AVDD2
Pop and click suppression
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Advanced on-chip digital signal processing includes a 5-band
Mic Preamps:
equaliser,
a mixed signal Automatic Level Control for the
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Stereo Differential or mono microphone Interfaces
Programmable preamp gain
Pseudo differential inputs with common mode rejection
Programmable ALC / Noise Gate in ADC path
Low-noise bias supplied for electret microphones
microphone or line input through the ADC as well as a purely
digital limiter function for record or playback. A programmable
high pass filter in the ADC path is provided for wind noise
reduction and an IIR with programmable coefficients can be used
as a notch filter to suppress fixed-frequency noise.
The WM8983 digital audio interface can operate in master or Other Features:
slave mode, while an integrated PLL supports flexible clocking
schemes. A-law and µ-law companding are fully supported.
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Enhanced 3-D function for improved stereo separation
Highly flexible mixing functions
5-band equaliser (ADC or DAC path)
ADC Programmable high pass filter (wind noise reduction)
ADC Programmable IIR notch filter
Aux inputs for stereo analog input signals or ‘beep’
PLL supporting various clocks between 8MHz-50MHz
Sample rates supported (kHz): 8, 11.025, 16, 12, 16, 22.05,
24, 32, 44.1, 48
The WM8983 operates at analogue supply voltages from 2.5V to
3.3V, although the digital core can operate at voltages down to
1.71V to save power. Speaker supplies can operate up to 5V for
increased speaker output power. Additional power management
control enables individual sections of the chip to be powered
down under software control.
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2.5V to 3.6V analogue supplies
1.71V to 3.6V digital supplies
2.5V to 5.5V speaker supplies
5x5mm 32-lead QFN package
APPLICATIONS
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Multimedia mobile phones
Production Data, November 2006, Rev 4.0
WOLFSON MICROELECTRONICS plc
Copyright ©2006 Wolfson Microelectronics plc
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