Datasheet > WM8946

WM8946

更新时间： 2024-11-26 12:23:27

品牌	Logo	应用领域
欧胜 - WOLFSON		解码器编解码器
页数	文件大小	规格书
175页	2921K
描述
Stereo Low-Power CODEC with Video Buffer

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WM8946 数据手册

WM8946

Stereo Low-Power CODEC with Video Buffer

DESCRIPTION

FEATURES



Hi-fi audio CODEC

The WM8946 is a highly integrated low power hi-fi CODEC

designed for portable devices such as digital still cameras.

94dB SNR during ADC recording (‘A’ weighted)

96dB SNR during DAC playback (‘A’ weighted)

Up to 6 analogue inputs may be connected; a 2-channel digital

microphone interface is also provided. Flexible output mixing

options support single-ended and differential configurations, with

outputs derived from the digital audio paths or from analogue

bypass paths. Twin stereo outputs or stereo line and mono BTL

headphone/speaker drive may be supported.



6 analogue audio inputs

Integrated bias reference for electret microphones

2-channel digital microphone interface

Powerful digital mixing / DSP functions:

3D-stereo enhancement

5-notch filters

5-band equalizer (EQ)

ReTune™ parametric filter

Dynamic range control and noise gate

Low-pass/High-pass filters

Direct Form 1 (DF1) programmable digital filter

Flexible digital mixing and powerful DSP functions are available.

Programmable filters and other processes may be applied to the

ADC or DAC signal paths. The DSP functions include 3D-stereo

enhancement, 5 notch filters, 5-band EQ, dynamic range control

and the Wolfson ReTune™ feature.



Digital beep generator

4 analogue audio outputs

Stereo line output

Mono BTL headphone/speaker output driver

I2S digital audio interface - sample rates 8kHz to 48kHz

Frequency Locked Loop (FLL) frequency conversion / filter

Video buffer function

Integrated LDO low-noise voltage regulator

36-ball W-CSP package (2.97 x 3.07 x 0.7mm, 0.5mm pitch)

The ReTune™ feature is a sophisticated digital filter that can

compensate for imperfect characteristics of the housing,

loudspeaker or microphone components in an application. The

ReTune™ algorithm can provide acoustic equalisation and

selective phase (delay) control of specific frequency bands.

The WM8946 is controlled via a I2C or SPI interface. Additional

functions include Digital beep generator, Video buffer,

programmable GPIO functions, Frequency Locked Loop (FLL)

for flexible clocking support and integrated LDO for low noise

supply regulation.

APPLICATIONS



Digital Still Cameras (DSC)

Multimedia phones

The WM8946 is supplied in 36-ball W-CSP package, ideal for

portable systems.

DCVDD

DBVDD

SPKVDD

VBIN

VBREFR

VBOUT

CURRENT MODE

VIDEO BUFFER

WM8946

AUX1

AUX2

LINEOUTL

LINEOUTR

Analogue Mic

Mux / PGA

IN1L/DMICDAT

IN2L

ADC L

DAC L

-1

DSP Core

(3D surround,

Re-Tune EQ,

Dynamic Range

Control)

OUTPUT

MIXERS

ADC /

DAC

Digital

Filters

Record

Digital

Filters

SPKOUTL

SPKOUTR

Analogue Mic

Mux / PGA

IN1R

IN2R

ADC R

DAC R

-1

Digital Beep

Generator

DMICDAT

Digital Mic

Interface

DMICCLK

(GPIO)

DIGITAL AUDIO

INTERFACE

CONTROL

INTERFACE

FLL

GPIO

Reference

LDO

MICBIAS

Production Data, July 2012, Rev 4.3

WOLFSON MICROELECTRONICS plc

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

12 3 4 5 6 7...175

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与WM8946相关器件

型号	品牌	获取价格	描述	数据表
WM8946ECS/R	WOLFSON	获取价格	Stereo Low-Power CODEC with Video Buffer
WM8948	WOLFSON	获取价格	Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller
WM8948ECS/R	WOLFSON	获取价格	Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller
WM8950	WOLFSON	获取价格	ADC WITH MICROPHONE INPUT AND PROGRAMMABLE DIGITAL FILTERS
WM8950CGEFL/RV	CIRRUS	获取价格	Consumer Circuit, CMOS, PQCC24, 4 X 4 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTI
WM8950CGEFL/V	CIRRUS	获取价格	Consumer Circuit, CMOS, PQCC24, 4 X 4 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTI
WM8950GEFL/RV	WOLFSON	获取价格	ADC WITH MICROPHONE INPUT AND PROGRAMMABLE DIGITAL FILTERS
WM8950GEFL/V	WOLFSON	获取价格	ADC WITH MICROPHONE INPUT AND PROGRAMMABLE DIGITAL FILTERS
WM8951L	WOLFSON	获取价格	STEREO ADC WITH MICROPHONE INPUT AND CLOCK GENERATOR
WM8951L_07	WOLFSON	获取价格	Stereo ADC with Microphone Input and Clock Generator

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