Datasheet > WM8904ECS/R

WM8904ECS/R

更新时间： 2024-11-09 12:23:27

品牌	Logo	应用领域
欧胜 - WOLFSON		解码器编解码器便携式
页数	文件大小	规格书
188页	1824K
描述
Ultra Low Power CODEC for Portable Audio Applications

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技术参数
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WM8904ECS/R 技术参数

生命周期：	Transferred	Reach Compliance Code：	unknown
风险等级：	5.59	Is Samacsys：	N
Base Number Matches：	1

WM8904ECS/R 数据手册

WM8904

Ultra Low Power CODEC for Portable Audio Applications

DESCRIPTION

FEATURES



3.0mW quiescent power consumption for DAC to

headphone playback

The WM8904 is a high performance ultra-low power stereo

CODEC optimised for portable audio applications.



DAC SNR 96dB typical, THD -86dB typical

ADC SNR 91dB typical, THD -80dB typical

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 headphone and line

outputs eliminate AC coupling capacitors, and both outputs

include common mode feedback paths to reject ground

noise.



2.4mW quiescent power consumption for analogue bypass

playback



Control write sequencer for pop minimised start-up and

shutdown

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.

Single register write for default start-up sequence



Integrated FLL provides all necessary clocks

Self-clocking modes allow processor to sleep

All standard sample rates from 8kHz to 96kHz

The analogue input stage can be configured for single

ended or differential inputs. Up to 3 stereo microphone or

line inputs may be connected. The input impedance is

constant with PGA gain setting.



Stereo digital microphone input

3 single ended inputs per stereo channel

1 fully differential mic / line input per stereo channel

A stereo digital microphone interface is provided, with a

choice of two inputs.



Digital Dynamic Range Controller (compressor / limiter)

Digital sidetone mixing

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.



Ground-referenced headphone driver

Ground-referenced line outputs

ReTune^TMMobile 5-band parametric equaliser with fully

programmable coefficients is integrated for optimization of

speaker characteristics. Programmable dynamic range

control is also available for maximizing loudness, protecting

speakers from clipping and preventing premature shutdown

due to battery droop.



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

36-ball WLCSP package (2.6 x 2.5mm, 6 x 6 ball grid,

0.4mm pitch)

Common audio sampling frequencies are supported from a

wide range of external clocks, either directly or generated

via the FLL.

APPLICATIONS



Portable multimedia players

Multimedia handsets

Handheld gaming

The WM8904 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.

Wireless headsets

Mobile internet devices

Netbooks

WOLFSON MICROELECTRONICS plc

Pre-Production, September 2012, Rev 3.3

To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews

12 3 4 5 6 7...188

中文翻译

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与WM8904ECS/R相关器件

型号	品牌	获取价格	描述	数据表
WM8904GEFL/V	CIRRUS	获取价格	PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC32, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, LEAD F
WM8912	WOLFSON	获取价格	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
WM8912CGEFL/RV	CIRRUS	获取价格	Consumer Circuit, CMOS, PQCC32, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, PLASTI
WM8912CGEFL/V	CIRRUS	获取价格	Consumer Circuit, CMOS, PQCC32, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, PLASTI
WM8912GEFL/RV	WOLFSON	获取价格	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
WM8912GEFL/V	WOLFSON	获取价格	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications
WM8918	CIRRUS	获取价格	Ultra Low Power DAC for Portable Audio Applications
WM8918CGEFL/V	CIRRUS	获取价格	Consumer Circuit, CMOS, PQCC32, 4 X 4 MM, 0.75 MM HEIGHT, 0.40 MM PITCH, LEAD FREE, PLASTI
WM8940	WOLFSON	获取价格	Mono CODEC with Speaker Driver
WM8940	CIRRUS	获取价格	Mono Codec with Speaker Driver

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