WM8983 PDF даташит
Спецификация WM8983 изготовлена «Wolfson Microelectronics» и имеет функцию, называемую «Mobile Multimedia CODEC». |
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Детали детали
Номер произв | WM8983 |
Описание | Mobile Multimedia CODEC |
Производители | Wolfson Microelectronics |
логотип |
30 Pages
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WM8983
Mobile Multimedia CODEC with 1W Speaker Driver
DESCRIPTION
FEATURES
The WM8983 is a low power, high quality stereo CODEC
designed for portable multimedia applications. Highly flexible
analogue mixing functions enable new application features,
combining hi-fi quality audio with voice communication.
The device integrates preamps for stereo differential mics, and
includes drivers for speaker, headphone and differential or stereo
line output. External component requirements are reduced as no
separate microphone or headphone amplifiers are required.
Advanced on-chip digital signal processing includes a 5-band
equaliser, a mixed signal Automatic Level Control for the
microphone or line input through the ADC as well as a purely
digital limiter function for record or playback. A programmable
high pass filter in the ADC path is provided for wind noise
reduction and an IIR with programmable coefficients can be used
as a notch filter to suppress fixed-frequency noise.
Stereo CODEC:
• DAC SNR 98dB, THD -84dB (‘A’ weighted @ 48kHz)
• ADC SNR 95dB, THD -84dB (‘A’ weighted @ 48kHz)
• Speaker driver (1W into 8Ω BTL with 5V supply)
• SNR 90dB
• PSRR 80dB
• Headphone driver with ‘capless’ option
• 40mW/channel output power into 16Ω / 3.3V AVDD2
• Pop and click suppression
Mic Preamps:
• Stereo Differential or mono microphone Interfaces
• Programmable preamp gain
• Pseudo differential inputs with common mode rejection
• Programmable ALC / Noise Gate in ADC path
• Low-noise bias supplied for electret microphones
The WM8983 digital audio interface can operate in master or Other Features:
slave mode, while an integrated PLL supports flexible clocking • Enhanced 3-D function for improved stereo separation
schemes. A-law and µ-law companding are fully supported.
• Highly flexible mixing functions
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• 2.5V to 3.6V analogue supplies
• 1.71V to 3.6V digital supplies
• 2.5V to 5.5V speaker supplies
• 5x5mm 32-lead QFN package
APPLICATIONS
• Multimedia mobile phones
WOLFSON MICROELECTRONICS plc
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Production Data, November 2006, Rev 4.0
Copyright ©2006 Wolfson Microelectronics plc
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WM8983
BLOCK DIAGRAM
Production Data
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PD Rev 4.0 November 2006
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Production Data
TABLE OF CONTENTS
WM8983
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
TERMINOLOGY .......................................................................................................... 13
SPEAKER OUTPUT THD VERSUS POWER ......................................................14
POWER CONSUMPTION ....................................................................................16
TYPICAL SCENARIOS................................................................................................ 16
AUDIO PATHS OVERVIEW ........................................................................................ 17
SYSTEM CLOCK TIMING ........................................................................................... 18
AUDIO INTERFACE TIMING – MASTER MODE ........................................................ 18
AUDIO INTERFACE TIMING – SLAVE MODE............................................................ 19
CONTROL INTERFACE TIMING – 3-WIRE MODE .................................................... 20
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 21
INTERNAL POWER ON RESET CIRCUIT ..........................................................22
RECOMMENDED POWER UP/DOWN SEQUENCE .................................................. 24
RECOMMENDED L/ROUT1 ENABLE SEQUENCE .................................................... 27
DEVICE DESCRIPTION.......................................................................................28
INTRODUCTION ......................................................................................................... 28
INPUT SIGNAL PATH ................................................................................................. 30
ANALOGUE TO DIGITAL CONVERTER (ADC).......................................................... 39
INPUT LIMITER / AUTOMATIC LEVEL CONTROL (ALC) .......................................... 44
OUTPUT SIGNAL PATH ............................................................................................. 56
3D STEREO ENHANCEMENT .................................................................................... 63
ANALOGUE OUTPUTS............................................................................................... 63
DIGITAL AUDIO INTERFACES................................................................................... 80
AUDIO SAMPLE RATES ............................................................................................. 85
MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ............................................... 85
COMPANDING............................................................................................................ 88
GENERAL PURPOSE INPUT/OUTPUT...................................................................... 90
OUTPUT SWITCHING (JACK DETECT)..................................................................... 90
CONTROL INTERFACE.............................................................................................. 92
RESETTING THE CHIP .............................................................................................. 93
POWER SUPPLIES .................................................................................................... 93
POWER MANAGEMENT ............................................................................................ 93
REGISTER MAP...................................................................................................95
REGISTER BITS BY ADDRESS ................................................................................. 97
DIGITAL FILTER CHARACTERISTICS .............................................................114
TERMINOLOGY ........................................................................................................ 114
DAC FILTER RESPONSES....................................................................................... 115
ADC FILTER RESPONSES....................................................................................... 115
HIGHPASS FILTER................................................................................................... 116
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PD Rev 4.0 November 2006
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