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DESCRIPTION
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.
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.
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.
The WM8986 digital audio interface can operate in master or
slave mode, while an integrated PLL provides flexible clocking
schemes.
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.
WM8986
Multimedia DAC With Class D Headphone and Line Out
FEATURES
Stereo DAC:
•
DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz)
•
Headphone driver with ‘capless’ option
- 40mW/channel output power into 16Ω / 3.3V AVDD2
- Class D headphone driver
- Class AB headphone / line Driver
- PSRR 70dB at 217Hz
•
Stereo, mono or differential line output
Mic Preamps:
•
Stereo differential or mono microphone interfaces
•
Programmable preamp gain
•
Pseudo differential inputs with common mode rejection
Other Features:
•
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
•
4x4mm 28-lead COL QFN package
APPLICATIONS
•
•
Portable audio player / FM radio
Multimedia Mobile Handsets
WOLFSON MICROELECTRONICS plc
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Pre-Production, February 2007, Rev 3.1
Copyright
©2007
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
