WM8776SEFT/RV datasheet, PDF - EEWORLD Datasheet

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WM8776SEFT/RV: Descriptioninterface - codecs stereo codec with 5-channel mux; Categorysemiconductor Other integrated circuit (IC); File Size567KB，57 Pages; ManufacturerAll Sensors; Environmental Compliance

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WM8776SEFT/RV Overview

interface - codecs stereo codec with 5-channel mux

WM8776SEFT/RV Parametric

Parameter Name	Attribute value
Manufacture	Wolfson Microelectronics
Product Category	Interface - CODECs
RoHS	Yes
Type	Audio CODEC, Stere
Resoluti	24 bi
Conversion Rate	192 kHz
Interface Type	Serial 2-Wire, 3-Wire (SPI)
Number of ADCs	1
Number of DACs	1
Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT
Package / Case	TQFP-48
Packaging	Reel
Minimum Operating Temperature	- 25 C
SNR	102 dB ADC/108 dB DAC
Factory Pack Quantity	2200

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DESCRIPTION

The WM8776 is a high performance, stereo audio

CODEC with five channel input selector. The WM8776 is

ideal for surround sound processing applications for

home hi-fi, DVD-RW and other audio visual equipment.

A stereo 24-bit multi-bit sigma delta ADC is used with a

five stereo channel input mixer. Each ADC channel has

programmable gain control with automatic level control.

Digital audio output word lengths from 16-32 bits and

sampling rates from 32kHz to 96kHz are supported.

A stereo 24-bit multi-bit sigma delta DAC is used with

digital audio input word lengths from 16-32 bits and

sampling rates from 32kHz to 192kHz. The DAC has an

input mixer allowing an external analogue signal to be

mixed with the DAC signal. There are also Headphone

and line outputs, with volume controls for the

headphones.

The WM8776 supports fully independent sample rates

for the ADC and DAC. The audio data interface supports

S, left justified, right justified and DSP formats.

The device is controlled in software via a 2 or 3 wire

serial interface, selected by the MODE pin, which

provides access to all features including channel

selection, volume controls, mutes, and de-emphasis

facilities.

The device is available in a 48-pin TQFP package.

WM8776

24-bit, 192kHz Stereo CODEC with 5 Channel I/P Multiplexer

FEATURES

•

Audio Performance

−

108dB SNR (‘A’ weighted @ 48kHz) DAC

−

102dB SNR (‘A’ weighted @ 48kHz) ADC

DAC Sampling Frequency: 32kHz – 192kHz

ADC Sampling Frequency: 32kHz – 96kHz

Five stereo ADC inputs with analogue gain adjust from

+24dB to –21dB in 0.5dB steps

Programmable Limiter or Automatic Level Control (ALC)

Stereo DAC with independent analogue and digital

volume controls

Stereo Headphone and Line Output

3-Wire SPI Compatible or 2-Wire Software Serial

Control Interface

Master or Slave Clocking Mode

Programmable Audio Data Interface Modes

−

S, Left, Right Justified or DSP

−

16/20/24/32 bit Word Lengths

Analogue Bypass Path Feature

Selectable AUX input to the volume controls

2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply

Operation

•

APPLICATIONS

•

Surround Sound AV Processors and Hi-Fi systems

DVD-RW

BLOCK DIAGRAM

WOLFSON MICROELECTRONICS plc

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at http://www.wolfsonmicro.com/enews/

Production Data, September 2008, Rev 4.1

Wolfson Microelectronics plc

WM8776

TABLE OF CONTENTS

Production Data

DESCRIPTION .......................................................................................................1

FEATURES.............................................................................................................1

APPLICATIONS .....................................................................................................1

BLOCK DIAGRAM .................................................................................................1

TABLE OF CONTENTS .........................................................................................2

PIN CONFIGURATION...........................................................................................3

ORDERING INFORMATION ..................................................................................3

PIN DESCRIPTION ................................................................................................4

ABSOLUTE MAXIMUM RATINGS.........................................................................5

ELECTRICAL CHARACTERISTICS ......................................................................6

TERMINOLOGY ............................................................................................................ 7

MASTER CLOCK TIMING......................................................................................9

DIGITAL AUDIO INTERFACE – MASTER MODE ....................................................... 10

DIGITAL AUDIO INTERFACE – SLAVE MODE .......................................................... 11

3-WIRE MPU INTERFACE TIMING ............................................................................ 12

CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 13

INTERNAL POWER ON RESET CIRCUIT ..........................................................14

DEVICE DESCRIPTION.......................................................................................16

INTRODUCTION ......................................................................................................... 16

AUDIO DATA SAMPLING RATES............................................................................... 17

ZERO DETECT ........................................................................................................... 18

POWERDOWN MODES ............................................................................................. 18

DIGITAL AUDIO INTERFACE ..................................................................................... 19

CONTROL INTERFACE OPERATION ........................................................................ 23

CONTROL INTERFACE REGISTERS ........................................................................ 25

LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 34

REGISTER MAP ......................................................................................................... 41

DIGITAL FILTER CHARACTERISTICS ...............................................................49

DAC FILTER RESPONSES......................................................................................... 49

ADC FILTER RESPONSES......................................................................................... 50

ADC HIGH PASS FILTER ........................................................................................... 51

DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 52

APPLICATIONS INFORMATION .........................................................................53

EXTERNAL CIRCUIT CONFIGURATION ................................................................... 53

RECOMMENDED EXTERNAL COMPONENTS ..................................................54

PACKAGE DIMENSIONS ....................................................................................56

IMPORTANT NOTICE ..........................................................................................57

ADDRESS: .................................................................................................................. 57

PD, Rev 4.1, September 2008

WM8776SEFT/RV Related Products

	WM8776SEFT/RV
Description	interface - codecs stereo codec with 5-channel mux
Manufacture	Wolfson Microelectronics
Product Category	Interface - CODECs
RoHS	Yes
Type	Audio CODEC, Stere
Resoluti	24 bi
Conversion Rate	192 kHz
Interface Type	Serial 2-Wire, 3-Wire (SPI)
Number of ADCs	1
Number of DACs	1
Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT
Package / Case	TQFP-48
Packaging	Reel
Minimum Operating Temperature	- 25 C
SNR	102 dB ADC/108 dB DAC
Factory Pack Quantity	2200

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