Power CODEC. WM8903 Datasheet

WM8903 CODEC. Datasheet pdf. Equivalent

WM8903 Datasheet
Recommendation WM8903 Datasheet
Part WM8903
Description Ultra Low Power CODEC
Feature WM8903; w WM8903 Ultra Low Power CODEC for Portable Audio Applications DESCRIPTION The WM8903 is a high p.
Manufacture Wolfson Microelectronics
Datasheet
Download WM8903 Datasheet




Wolfson Microelectronics WM8903
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WM8903
Ultra Low Power CODEC for Portable Audio Applications
DESCRIPTION
The WM8903 is a high performance ultra-low power stereo
CODEC optimised for portable audio applications.
The device features stereo ground-referenced headphone
amplifiers using the Wolfson ‘Class W’ amplifier techniques -
incorporating an innovative dual-mode charge pump
architecture - to optimise efficiency and power consumption
during playback. The ground-referenced outputs eliminate
headphone coupling capacitors. Both headphone and line
outputs include common mode feedback paths to reject
ground noise.
Control sequences for audio path setup can be pre-loaded
and executed by an integrated sequencer to reduce
software driver development and eliminate pops and clicks
via Wolfson’s SilentSwitch™ technology.
The analogue input stage can be configured for single
ended or differential inputs. Up to 3 stereo microphone or
line inputs may be connected. The input impedance is
constant with PGA gain setting.
A stereo digital microphone interface is provided, which can
also be mixed with the mic/line signals at the output mixers.
A dynamic range controller provides compression and level
control to support a wide range of portable recording
applications. Anti-clip and quick release features offer good
performance in the presence of loud impulsive noises.
Common audio sampling frequencies are supported from a
range of external clocks, either directly or generated via the
Frequency Locked Loop (FLL).
The WM8903 can operate directly from a single 1.8V
switched supply. For optimal power consumption, the digital
core can be operated from a 1.0V supply.
FEATURES
4.5mW power consumption for DAC to headphone
playback
DAC SNR 96dB typical, THD -86dB typical
ADC SNR 92dB typical, THD -80dB typical
Control sequencer for pop minimised start-up and shut-
down
Single register write for default start-up sequence
Integrated FLL provides all necessary clocks
- Self-clocking modes allow processor to sleep
- All standard sample rates from 8kHz to 96kHz
Stereo digital microphone input
3 single ended inputs per stereo channel
1 fully differential mic / line input per stereo channel
Digital Dynamic Range Controller (compressor / limiter)
Digital sidetone mixing
Ground-referenced headphone driver
Ground-referenced line outputs
Stereo differential line driver for direct interface to WM9001
speaker driver
40-pin QFN package (5x5mm)
APPLICATIONS
Portable multimedia players
Multimedia handsets
Handheld gaming
WOLFSON MICROELECTRONICS plc
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Production Data, June 2012, Rev 4.5
Copyright 2012 Wolfson Microelectronics plc



Wolfson Microelectronics WM8903
WM8903
BLOCK DIAGRAM
IN1L
IN2L
IN3L
DMIC_LR / GPIO1
DMIC_DAT / GPIO2
IN1R
IN2R
IN3R
MICBIAS
+
M PGA
U + MIC
X BOOST
-
Stereo
Digital
Mic
Interface
+
M PGA
U + MIC
X BOOST
-
VMID
Reference
DGND
DCVDD
DBVDD
WM8903
ADC
ADC
DYNAMIC
RANGE
CONTROL
VOLUME
DIGITAL
MONO MIX
DIGITAL
SIDE TONE
DIGITAL
FILTERS
VOLUME
DIGITAL
MONO MIX
DAC
DAC
CONTROL
INTERFACE
AUDIO
INTERFACE
FLL / CLOCK
CIRCUITRY
Production Data
CPGND CFB1 CFB2 CPVDD
LEFT MIXER
CHARGE PUMP
HPOUTL_VOL
VPOS
VNEG
(headphone / line output)
HPOUTL
HPGND
RIGHT MIXER
HPOUTR_VOL
LINEOUTL_VOL
HPOUTR
(headphone / line output)
LINEOUTL
LINEGND
LEFT SPKR MIXER
RIGHT SPKR MIXER
LINEOUTR_VOL
SPKR_VOL
SPKR_VOL
LINEOUTR
(differential line output)
LOP
LON
ROP
RON
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PD, Rev 4.5, June 2012
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Wolfson Microelectronics WM8903
Production Data
TABLE OF CONTENTS
WM8903
DESCRIPTION....................................................................................................... 1 
FEATURES ............................................................................................................ 1 
APPLICATIONS..................................................................................................... 1 
BLOCK DIAGRAM ................................................................................................ 2 
TABLE OF CONTENTS......................................................................................... 3 
PIN CONFIGURATION .......................................................................................... 6 
ORDERING INFORMATION.................................................................................. 6 
PIN DESCRIPTION................................................................................................ 7 
ABSOLUTE MAXIMUM RATINGS ........................................................................ 8 
RECOMMENDED OPERATING CONDITIONS..................................................... 8 
ELECTRICAL CHARACTERISTICS ..................................................................... 9 
TERMINOLOGY ............................................................................................................... 9 
COMMON TEST CONDITIONS ....................................................................................... 9 
INPUT SIGNAL PATH .................................................................................................... 10 
OUTPUT SIGNAL PATH ................................................................................................ 12 
BYPASS PATH .............................................................................................................. 14 
CHARGE PUMP............................................................................................................. 15 
FLL ................................................................................................................................. 15 
OTHER PARAMETERS ................................................................................................. 15 
POWER CONSUMPTION.................................................................................... 17 
COMMON TEST CONDITIONS ..................................................................................... 17 
POWER CONSUMPTION MEASUREMENTS............................................................... 17 
SIGNAL TIMING REQUIREMENTS .................................................................... 19 
COMMON TEST CONDITIONS ..................................................................................... 19 
MASTER CLOCK ........................................................................................................... 19 
AUDIO INTERFACE TIMING ......................................................................................... 20 
MASTER MODE .............................................................................................................................................................. 20 
SLAVE MODE.................................................................................................................................................................. 21 
TDM MODE ..................................................................................................................................................................... 22 
CONTROL INTERFACE TIMING ................................................................................... 23 
DIGITAL FILTER CHARACTERISTICS .............................................................. 24 
DAC FILTER RESPONSES ........................................................................................... 25 
ADC FILTER RESPONSES ........................................................................................... 26 
ADC HIGH PASS FILTER RESPONSES....................................................................... 27 
DE-EMPHASIS FILTER RESPONSES .......................................................................... 28 
DEVICE DESCRIPTION ...................................................................................... 29 
INTRODUCTION ............................................................................................................ 29 
ANALOGUE INPUT SIGNAL PATH ............................................................................... 30 
INPUT PGA ENABLE ...................................................................................................................................................... 31 
INPUT PGA CONFIGURATION ...................................................................................................................................... 31 
SINGLE-ENDED INPUT .................................................................................................................................................. 33 
DIFFERENTIAL LINE INPUT........................................................................................................................................... 33 
DIFFERENTIAL MICROPHONE INPUT.......................................................................................................................... 34 
INPUT PGA GAIN CONTROL ......................................................................................................................................... 34 
INPUT PGA COMMON MODE AMPLIFIER .................................................................................................................... 36 
ELECTRET CONDENSER MICROPHONE INTERFACE.............................................. 37 
MICBIAS CURRENT DETECT ........................................................................................................................................ 37 
MICBIAS CURRENT DETECT FILTERING .................................................................................................................... 38 
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PD, Rev 4.5, June 2012
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