WM8986
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Multimedia DAC With Class D Headphone and Line Out
DESCRIPTION
FEATURES
Stereo DAC:
The WM8986 is a low power, high quality, feature-rich stereo
DAC designed for portable multimedia applications that require
low power consumption and high quality audio.
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DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz)
Headphone driver with ‘capless’ option
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40mW/channel output power into 16Ω / 3.3V AVDD2
Class D headphone driver
Class AB headphone / line Driver
PSRR 70dB at 217Hz
The device integrates preamps for stereo differential mics, and
includes class D and class AB drivers for headphone and
differential or stereo line output. External component
requirements are reduced as no separate microphone or
headphone amplifiers are required.
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Stereo, mono or differential line output
Mic Preamps:
Advanced DSP features include a 5-band equaliser and a digital
playback limiter. Highly flexible mixers enable many new
application features, with the option to playback any
combination of voice, line inputs and digital audio such as FM
Radio or MP3.
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Stereo differential or mono microphone interfaces
Programmable preamp gain
Pseudo differential inputs with common mode rejection
Other Features:
The WM8986 digital audio interface can operate in master or
slave mode, while an integrated PLL provides flexible clocking
schemes.
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Enhanced 3-D function for improved stereo separation
Digital playback limiter
5-band Equaliser
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
Low power, low voltage
2.5V to 3.6V analogue supplies
1.71V to 3.6V digital supplies
The WM8986 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. Additional power management control
enables individual sections of the chip to be powered down
under software control.
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4x4mm 28-lead COL QFN package
APPLICATIONS
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Portable audio player / FM radio
Multimedia Mobile Handsets
Pre-Production, February 2007, Rev 3.1
WOLFSON MICROELECTRONICS plc
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Copyright ©2007 Wolfson Microelectronics plc