WM8940GEFL/V Wolfson Microelectronics, WM8940GEFL/V Datasheet - Page 3

• Manufacturer Part Number: WM8940GEFL/V
• Description: Audio CODECs Mono CODEC with Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8940GEFL/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

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Production Data
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................2
TABLE OF CONTENTS .........................................................................................3
PIN CONFIGURATION...........................................................................................5
ORDERING INFORMATION ..................................................................................5
PIN DESCRIPTION ................................................................................................6
ABSOLUTE MAXIMUM RATINGS.........................................................................7
RECOMMENDED OPERATING CONDITIONS .....................................................7
ELECTRICAL CHARACTERISTICS ......................................................................8
AUDIO PATHS OVERVIEW .................................................................................11
SIGNAL TIMING REQUIREMENTS .....................................................................13
DEVICE DESCRIPTION.......................................................................................17
REGISTER MAP...................................................................................................68
DIGITAL FILTER CHARACTERISTICS ...............................................................80
TERMINOLOGY .......................................................................................................... 10
SYSTEM CLOCK TIMING ........................................................................................... 13
AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 13
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 14
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 15
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 16
INTRODUCTION ......................................................................................................... 17
INPUT SIGNAL PATH ................................................................................................. 18
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 23
INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 28
OUTPUT SIGNAL PATH ............................................................................................. 41
ANALOGUE OUTPUTS............................................................................................... 45
OUTPUT SWITCH ...................................................................................................... 48
DIGITAL AUDIO INTERFACES................................................................................... 51
AUDIO SAMPLE RATES ............................................................................................. 55
MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 55
COMPANDING............................................................................................................ 58
GENERAL PURPOSE INPUT/OUTPUT...................................................................... 60
CONTROL INTERFACE.............................................................................................. 61
3-WIRE SERIAL CONTROL MODE ............................................................................ 62
READBACK IN 3-WIRE MODE ................................................................................... 62
2-WIRE SERIAL CONTROL MODE ............................................................................ 63
RESETTING THE CHIP .............................................................................................. 64
POWER SUPPLIES .................................................................................................... 64
POWER MANAGEMENT ............................................................................................ 66
POP MINIMISATION ................................................................................................... 67
REGISTER BITS BY ADDRESS ................................................................................. 69
TERMINOLOGY .......................................................................................................... 80
DAC FILTER RESPONSES......................................................................................... 81
ADC FILTER RESPONSES......................................................................................... 81
HIGHPASS FILTER..................................................................................................... 82
NOTCH FILTERS AND LOW PASS FILTER............................................................... 83
TABLE OF CONTENTS
PD, Rev 4.2, April 2008
WM8940
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