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WM8731CSEFL

Description
Interface - CODECs Stereo Codec with H/P
Categorysemiconductor    Analog mixed-signal IC   
File Size795KB,66 Pages
ManufacturerCirrus Logic
Websitehttp://www.cirrus.com
Environmental Compliance
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WM8731CSEFL Overview

Interface - CODECs Stereo Codec with H/P

WM8731CSEFL Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerCirrus Logic
Product CategoryInterface - CODECs
RoHSDetails
TypeAudio CODEC, Stereo Low Power
Resolution24 bit
Conversion Rate96 kHz
Interface TypeSerial (2-Wire, 3-Wire)
Number of ADCs2 ADC
Number of DACs2 DAC
Operating Supply Voltage2.7 V to 3.6 V
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT
Package / CaseQFN-28
PackagingTube
ProductAudio CODECs
SNR - Signal to Noise Ratio90 dB ADC/100 dB DAC
Factory Pack Quantity60
Supply Voltage - Max3.6 V
Supply Voltage - Min2.7 V
Unit Weight0.002497 oz
w
DESCRIPTION
The WM8731 or WM8731L (WM8731/L) are low power
stereo CODECs with an integrated headphone driver. The
WM8731/L is designed specifically for portable MP3 audio
and speech players and recorders. The WM8731 is also
ideal for MD, CD-RW machines and DAT recorders.
Stereo line and mono microphone level audio inputs are
provided, along with a mute function, programmable line
level volume control and a bias voltage output suitable for
an electret type microphone.
Stereo 24-bit multi-bit sigma delta ADCs and DACs are used
with oversampling digital interpolation and decimation filters.
Digital audio input word lengths from 16-32 bits and
sampling rates from 8kHz to 96kHz are supported.
Stereo audio outputs are buffered for driving headphones
from a programmable volume control, line level outputs are
also provided along with anti-thump mute and power
up/down circuitry.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including
volume controls, mutes, de-emphasis and extensive power
management facilities. The device is available in a small 28-
lead SSOP package or the smaller 28 lead quad flat
leadless package (QFN).
WM8731 / WM8731L
Portable Internet Audio CODEC with Headphone Driver
and Programmable Sample Rates
FEATURES
Highly Efficient Headphone Driver
Audio Performance
- ADC SNR 90dB (‘A’ weighted) at 3.3V, 85dB at 1.8V
-
DAC SNR 100dB
(‘A’ weighted) at
3.3V, 95dB at 1.8V
Low Power
- Playback only 22mW, 8mW (‘L’ Variant)
- Analogue Pass Through 12mW, 3.5mW (‘L’ variant)
- 1.42 – 3.6V Digital Supply Operation
- 2.7 – 3.6V Analogue Supply Operation
- 1.8 – 3.6V Analogue Supply Operation (‘L’ Variant)
ADC and DAC Sampling Frequency: 8kHz – 96kHz
Selectable ADC High Pass Filter
2 or 3-Wire MPU Serial Control Interface
Programmable Audio Data Interface Modes
2
- I S, Left, Right Justified or DSP
- 16/20/24/32 bit Word Lengths
- Master or Slave Clocking Mode
Microphone Input and Electret Bias with Side Tone Mixer
Available in 28-lead SSOP or 28-lead QFN package
APPLICATIONS
MODE
SCLK
Portable MP3 Players and Recorders
CD and Minidisc Recorders
PDAs / smartphones
BLOCK DIAGRAM
CSB
AVDD
CONTROL INTERFACE
VMID
Bypass
AGND
MUTE
ATTEN /
MUTE
SDIN
W
WM8731
HPVDD
HPGND
+ 6 to - 73 dB
1 dB Steps
VOL /
MUTE
H /P
DRIVER
MICBIAS
RLINEIN
VOL
MUTE
MUTE
MUX
Side Tone
ADC
DAC
RHPOUT
+ 12 to - 34 .5 dB , 1 .5 dB
Steps
MICIN
0 dB /
20 dB
MUTE
DIGITAL
FILTERS
MUTE
ROUT
LOUT
MUX
ADC
DAC
MUTE
VOL /
MUTE
H/P
DRIVER
LLINEIN
VOL
MUTE
+ 12 to - 34 .5 dB , 1 . 5 dB
Steps
LHPOUT
Side Tone
ATTEN /
MUTE
MUTE
+ 6 to - 73 dB
1 dB Steps
OSC
CLKIN
DIVIDER
( Div x 1 , x 2)
CLKOUT
DIVIDER
( Div x 1 , x 2 )
DIGTAL AUDIO INTERFACE
Bypass
DACDAT
XTI/MCLK
ADCDAT
DACLRC
ADCLRC
DCVDD
CLKOUT
DBVDD
WOLFSON MICROELECTRONICS plc
Production Data, October 2012, Rev 4.9
Copyright
2012
Wolfson Microelectronics plc
DGND
BCLK
XTO

WM8731CSEFL Related Products

WM8731CSEFL WM8731CLSEFL-R WM8731SEFL-R WM8731LSEFL WM8731CLSEFL WM8731SEDS/R WM8731CSEFL/R WM8731SEDS/V
Description Interface - CODECs Stereo Codec with H/P Interface - CODECs Stereo Codec with H/P Interface - CODECs Stereo CODEC with H/P Interface - CODECs Stereo Codec with H/P Interface - CODECs Stereo Codec with H/P Interface - CODECs Stereo CODEC with H/P Interface - CODECs Stereo Codec with H/P Interface - CODECs Stereo Codec with H/P
Packaging Tube Reel Reel Tube - - Reel Tube
Product Attribute Attribute Value Attribute Value Attribute Value Attribute Value - - Attribute Value Attribute Value
Manufacturer Cirrus Logic Cirrus Logic Cirrus Logic Cirrus Logic - - Cirrus Logic Cirrus Logic
Product Category Interface - CODECs Interface - CODECs Interface - CODECs Interface - CODECs - - Interface - CODECs Interface - CODECs
RoHS Details Details Details Details - - Details Details
Type Audio CODEC, Stereo Low Power Audio CODEC, Stereo Low Power Audio CODEC, Stereo Audio CODEC, Stereo Low Power - - Audio CODEC, Stereo Low Power Audio CODEC, Stereo Low Power
Resolution 24 bit 24 bit - 24 bit - - 24 bit 24 bit
Conversion Rate 96 kHz 96 kHz 96 kHz 96 kHz - - 96 kHz 96 kHz
Interface Type Serial (2-Wire, 3-Wire) Serial (2-Wire, 3-Wire) Serial (2-Wire, 3-Wire, I2C) Serial (2-Wire, 3-Wire) - - Serial (2-Wire, 3-Wire) Serial (2-Wire, 3-Wire)
Number of ADCs 2 ADC 2 ADC 2 ADC 2 ADC - - 2 ADC 2 ADC
Number of DACs 2 DAC 2 DAC 2 DAC 2 DAC - - 2 DAC 2 DAC
Operating Supply Voltage 2.7 V to 3.6 V 1.8 V to 3.6 V 1.42 V to 3.6 V 1.42 V to 3.6 V - - 2.7 V to 3.6 V 2.7 V to 3.6 V
Minimum Operating Temperature - 40 C - 40 C - 25 C - 40 C - - - 40 C - 40 C
Maximum Operating Temperature + 85 C + 85 C + 85 C + 85 C - - + 85 C + 85 C
Mounting Style SMD/SMT SMD/SMT SMD/SMT SMD/SMT - - SMD/SMT SMD/SMT
Package / Case QFN-28 QFN-28 QFN-28 QFN-28 - - QFN-28 SSOP-28
Product Audio CODECs Audio CODECs Audio CODECs Audio CODECs - - Audio CODECs Audio CODECs
SNR - Signal to Noise Ratio 90 dB ADC/100 dB DAC 90 dB ADC/100 dB DAC - 90 dB ADC/100 dB DAC - - 90 dB ADC/100 dB DAC 90 dB ADC/100 dB DAC
Factory Pack Quantity 60 3500 3500 95 - - 3500 47
Unit Weight 0.002497 oz 0.002497 oz 0.002497 oz 0.002497 oz - - 0.002497 oz 0.025045 oz
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