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WM8912

Wolfson Microelectronics
Part Number WM8912
Manufacturer Wolfson Microelectronics
Description Ultra Low Power DAC
Published May 27, 2016
Detailed Description w WM8912 Ultra Low Power DAC with Headphone Driver for Portable Audio Applications DESCRIPTION The WM8912 is a high p...
Datasheet PDF File WM8912 PDF File

WM8912
WM8912

Overview
w WM8912 Ultra Low Power DAC with Headphone Driver for Portable Audio Applications DESCRIPTION The WM8912 is a high performance ultra-low power stereo DAC optimised for portable audio applications.
The device features stereo ground-referenced headphone amplifiers using the Wolfson ‘Class-W’ amplifier techniques incorporating an innovative dual-mode charge pump architecture - to optimise efficiency and power consumption during playback.
The ground-referenced outputs eliminate headphone coupling capacitors.
The outputs include common mode feedback paths to reject ground noise.
Control sequences for audio path setup can be pre-loaded and executed by an integrated control write sequencer to reduce software driver development and minimise pops and clicks via Wolfson’s SilentSwitch™ technology.
A dynamic range controller provides compression and level control to support a wide range of portable recording applications.
Anti-clip and quick release features offer good performance in the presence of loud impulsive noises.
ReTuneTM Mobile 5-band parametric equaliser with fully programmable coefficients is integrated for optimization of speaker characteristics.
Common audio sampling frequencies are supported from a wide range of external clocks, either directly or generated using the integrated FLL.
The WM8912 can operate directly from a single 1.
8V switched supply.
For optimal power consumption, the digital core can be operated from a 1.
0V supply.
FEATURES  3.
8mW quiescent power consumption for DAC to headphone playback  DAC SNR 96dB typical, THD -86dB typical  Class W ground-referenced headphone driver - 28mW per channel into 30 at <1% THD - 32mW per channel into 15 at <1% THD  Dynamic range controller  ReTune™ Mobile parametric equalizer  Integrated control write sequencer for pop minimised startup and shutdown  Single register write for default start-up and shutdown sequences  On-chip FLL provides all necessary clocks  DAC supports standard sample rates from ...


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