WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 2

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8974
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DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATING CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
SIGNAL TIMING REQUIREMENTS .......................................................................9
DEVICE DESCRIPTION.......................................................................................13
REGISTER MAP...................................................................................................65
DIGITAL FILTER CHARACTERISTICS ...............................................................77
APPLICATIONS INFORMATION .........................................................................85
PACKAGE DIAGRAM ..........................................................................................86
IMPORTANT NOTICE ..........................................................................................87
TERMINOLOGY ............................................................................................................ 8
SYSTEM CLOCK TIMING ............................................................................................. 9
AUDIO INTERFACE TIMING – MASTER MODE .......................................................... 9
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 10
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 11
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 12
INTRODUCTION ......................................................................................................... 13
INPUT SIGNAL PATH ................................................................................................. 14
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 19
INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 23
OUTPUT SIGNAL PATH ............................................................................................. 35
ANALOGUE OUTPUTS............................................................................................... 42
OUTPUT SWITCH ...................................................................................................... 47
DIGITAL AUDIO INTERFACES................................................................................... 49
AUDIO SAMPLE RATES ............................................................................................. 54
MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 55
GENERAL PURPOSE INPUT/OUTPUT...................................................................... 57
CONTROL INTERFACE.............................................................................................. 57
RESETTING THE CHIP .............................................................................................. 58
POWER SUPPLIES .................................................................................................... 58
POWER MANAGEMENT ............................................................................................ 63
REGISTER BITS BY ADDRESS ................................................................................. 66
TERMINOLOGY .......................................................................................................... 77
DAC FILTER RESPONSES......................................................................................... 78
ADC FILTER RESPONSES......................................................................................... 78
DE-EMPHASIS FILTER RESPONSES........................................................................ 79
HIGHPASS FILTER..................................................................................................... 80
5-BAND EQUALISER .................................................................................................. 81
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 85
ADDRESS: .................................................................................................................. 87
TABLE OF CONTENTS
PD, Rev 4.5, September 2008
Production Data
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