wm8762ged-v Wolfson Microelectronics plc, wm8762ged-v Datasheet

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wm8762ged-v

Manufacturer Part Number
wm8762ged-v
Description
24-bit 192khz Stereo Dac
Manufacturer
Wolfson Microelectronics plc
Datasheet
w
DESCRIPTION
The WM8762 is a high performance stereo DAC designed
for audio applications such as DVD, home theatre systems,
and digital TV. The WM8762 supports data input word
lengths from 16 to 24-bits and sampling rates up to 192kHz.
The WM8762 consists of a serial interface port, digital
interpolation filters, multi-bit sigma delta modulators and
stereo DAC in a very small 8-pin SOIC package.
The WM8762 supports a 16-24-bit left justified digital audio
interface.
The WM8762 is an ideal device to interface to AC-3™,
DTS™, and MPEG audio decoders for surround sound
applications, or for use in DVD players, including supporting
the implementation of 2 channels at 192kHz for high-end
DVD-Audio applications.
BLOCK DIAGRAM
BCKIN
LRCIN
WOLFSON MICROELECTRONICS plc
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DIN
INTERFACE
SERIAL
W
WM8762
at
24-bit 192kHz Stereo DAC
http://www.wolfsonmicro.com/enews/
MUTE
MUTE
FILTERS
DIGITAL
MCLK
FEATURES
APPLICATIONS
-
-
-
Stereo DAC
Audio Performance
Sampling Frequency: 8kHz – 192kHz
Audio Data Interface Format
2.7V – 5.5V Supply Operation
8-lead SOIC Package
DVD Players
Digital TV
Digital Set Top Box
98dB SNR (‘A’ weighted @ 48kHz)
-84dB THD
16-24-Bit Left Justified
MODULATOR
MODULATOR
SIGMA
DELTA
SIGMA
DELTA
Production Data, January 2009, Rev 4.4
Copyright ©2009 Wolfson Microelectronics plc
VDD
RIGHT
DAC
LEFT
DAC
WM8762
GND
VOUTL
VOUTR

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wm8762ged-v Summary of contents

Page 1

... FILTERS MUTE MCLK http://www.wolfsonmicro.com/enews/ WM8762 98dB SNR (‘A’ weighted @ 48kHz) -84dB THD 16-24-Bit Left Justified SIGMA RIGHT DELTA DAC MODULATOR LEFT SIGMA DAC DELTA MODULATOR VDD GND Production Data, January 2009, Rev 4.4 Copyright ©2009 Wolfson Microelectronics plc VOUTR VOUTL ...

Page 2

WM8762 DESCRIPTION ............................................................................................................1 FEATURES..................................................................................................................1 APPLICATIONS ..........................................................................................................1 BLOCK DIAGRAM ......................................................................................................1 TABLE OF CONTENTS ..............................................................................................2 PIN CONFIGURATION................................................................................................3 ORDERING INFORMATION .......................................................................................3 PIN DESCRIPTION .....................................................................................................3 ABSOLUTE MAXIMUM RATINGS..............................................................................4 DC ELECTRICAL CHARACTERISTICS .....................................................................5 ELECTRICAL CHARACTERISTICS ...........................................................................5 TERMINOLOGY ................................................................................................................. 6 POWER ON RESET (POR) ............................................................................................... 6 ...

Page 3

... WM8762 PIN CONFIGURATION DIN 1 BCKIN 2 WM8762 LRCIN 3 MCLK 4 ORDERING INFORMATION TEMPERATURE DEVICE RANGE o WM8762GED/V -40 to +85 o WM8762GED/RV -40 to +85 Note: Reel Quantity = 3,000 PIN DESCRIPTION PIN NAME 1 DIN Digital input 2 BCKIN Digital input 3 LRCIN Digital input 4 MCLK Digital input 5 VOUTL Analogue output ...

Page 4

WM8762 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics ...

Page 5

WM8762 DC ELECTRICAL CHARACTERISTICS PARAMETER Supply range Ground Supply current Supply current Power down current (note 3) ELECTRICAL CHARACTERISTICS Test Conditions o VDD = 5V, GND = 0V + 48kHz, MCLK = 256fs unless otherwise ...

Page 6

WM8762 Notes: 1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’ weighted over a 20Hz to 20kHz bandwidth. 2. All performance measurements done with 20kHz low ...

Page 7

WM8762 Figure 2 Generation of Internal NPOR at Power-On-Reset Figure 3 illustrates the NPOR generation when the power is removed. Figure 3 Generation of NPOR at Power-Off-Reset w Production Data PD, Rev 4.4,January 2009 7 ...

Page 8

WM8762 MASTER CLOCK TIMING MCLK Figure 4 Master Clock Timing Requirements Test Conditions o VDD = 5V, GND = 0V + 48kHz, MCLK = 256fs unless otherwise stated. A PARAMETER System Clock Timing Information MCLK ...

Page 9

WM8762 DEVICE DESCRIPTION GENERAL INTRODUCTION The WM8762 is a high performance DAC designed for digital consumer audio applications. The range of features make it ideally suited for use in DVD players, AV receivers and other consumer audio equipment. The WM8762 ...

Page 10

WM8762 CLOCKING SCHEMES In a typical digital audio system there is only one central clock source producing a reference clock to which all audio data processing is synchronised. This clock is often referred to as the audio system’s Master Clock. ...

Page 11

WM8762 DIGITAL FILTER CHARACTERISTICS PARAMETER Passband Edge Passband Ripple Stopband Attenuation Table 2 Digital Filter Characteristics DAC FILTER RESPONSES 0 -20 -40 -60 -80 -100 -120 0 0.5 1 1.5 Frequency (Fs) Figure 7 DAC Digital Filter Frequency Response -44.1, ...

Page 12

WM8762 TYPICAL PERFORMANCE -65 -70 -75 -80 - -95 B -100 -105 -110 -115 -120 -160 -150 -140 -130 -120 Figure 11 WM8762 Functionality THD+N VDD = 5V -70 -72.5 -75 -77.5 -80 -82.5 -85 -87.5 ...

Page 13

WM8762 APPLICATIONS INFORMATION RECOMMENDED EXTERNAL COMPONENTS Figure 13 External Component Diagram RECOMMENDED EXTERNAL COMPONENTS VALUES COMPONENT SUGGESTED REFERENCE VALUE C1 10µF C2 0.1µF C3 and C4 10µF Table 3 External Components Description w DESCRIPTION De-coupling for VDD De-coupling for VDD ...

Page 14

WM8762 RECOMMENDED ANALOGUE LOW PASS FILTER (OPTIONAL) Ω 4.7k 10uF Ω 1.8k 7.5K + 1.0nF Ω 47k Figure 14 Recommended Low Pass Filter (Optional) An external low pass filter is recommended (see Figure 20) if the device is driving a ...

Page 15

WM8762 PACKAGE DRAWING D: 8 PIN SOIC 3 0.10 (0.004) Dimensions Symbols (mm) MIN A 1. 0.33 C 0.19 D 4.80 e 1.27 BSC E 3.80 h ...

Page 16

... WM8762 IMPORTANT NOTICE Wolfson Microelectronics plc (“Wolfson”) products and services are sold subject to Wolfson’s terms and conditions of sale, delivery and payment supplied at the time of order acknowledgement. Wolfson warrants performance of its products to the specifications in effect at the date of shipment. Wolfson reserves the right to make changes to its products and specifications or to discontinue any product or service without notice ...

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