WM8912 datasheet(1/129 Pages) CIRRUS

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WM8912

Ultra Low Power DAC with Headphone Driver

for Portable Audio Applications

WOLFSON MICROELECTRONICS plc

Production Data, February 2013, Rev 4.1

Copyright

2013 Wolfson Microelectronics plc

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.

ReTune

TM 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 start-

up 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 8kHz to 96kHz



32-pin QFN package (4x4mm, 0.4mm pitch)

APPLICATIONS



Portable multimedia players



Multimedia handsets



Handheld gaming

Số phần tương tự - WM8912

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Wolfson Microelectronic...	WM8912	1Mb / 128P	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
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	WM8912GEFL/V	1Mb / 128P	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

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Mô tả tương tự - WM8912

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