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WM1811
Multi-Channel Audio Hub CODEC for Smartphones
DESCRIPTION
FEATURES
The WM1811 is a highly integrated ultra-low power hi-fi CODEC
designed for smartphones and other portable devices rich in
multimedia features.
An integrated stereo class D speaker driver and class W
headphone driver minimize power consumption during audio
playback.
The device requires only two voltage supplies, with all other
internal supply rails generated from integrated LDOs.
Stereo full duplex asynchronous sample rate conversion and
multi-channel digital mixing combined with powerful analogue
mixing allow the device to support a huge range of different
architectures and use cases.
A programmable parametric EQ provides speaker compensation
in the digital playback paths. The dynamic range controller can
be used in record or playback paths for maintaining a constant
signal level, maximizing loudness and protecting speakers
against overloading and clipping.
A smart digital microphone interface provides power regulation,
a low jitter clock output and decimation filters for up to two digital
microphones. Microphone activity detection with interrupt is
available. Impedance sensing and measurement is provided for
external accessory / push-button detection.
Fully differential internal architecture and on-chip RF noise filters
ensure a very high degree of noise immunity. Active ground loop
noise rejection and DC offset correction help prevent pop noise
and suppress ground noise on the headphone outputs.
24-bit 2-channel Hi-Fi DAC and 2-channel Hi-Fi ADC
100dB SNR during DAC playback (‘A’ weighted)
Smart MIC interface
- Power, clocking and data input for up to two digital MICs
- High performance analogue MIC interface
- MIC activity detect & interrupt allows processor to sleep
- Impedance sensing for accessory / push-button detection
2W stereo (2 x 2W) class D speaker driver
Capless Class W headphone drivers
- Integrated charge pump
- 5.3mW total power for DAC playback to headphones
4 Line outputs (single-ended or differential)
BTL Earpiece driver
Digital audio interfaces for multi-processor architecture
- Asynchronous stereo duplex sample rate conversion
- Powerful mixing and digital loopback functions
ReTuneTM Mobile 5-band, 4-channel parametric EQ
Dynamic range controller
Dual FLL provides all necessary clocks
- Self-clocking modes allow processor to sleep
- All standard sample rates from 8kHz to 96kHz
Active noise reduction circuits
- DC offset correction removes pops and clicks
- Ground loop noise cancellation
Integrated LDO regulators
80-ball W-CSP package (4.148 x 3.866 x 0.596mm)
APPLICATIONS
Smartphones and music phones
Portable navigation
Tablets
eBooks
Portable Media Players
WOLFSON MICROELECTRONICS plc
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Product Brief, February 2011, Rev 2.0
Copyright 2011 Wolfson Microelectronics plc

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WM1811
BLOCK DIAGRAM
Product Brief
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PB, February 2011, Rev 2.0
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Product Brief
PIN CONFIGURATION
WM1811
ORDERING INFORMATION
ORDER CODE TEMPERATURE RANGE
WM1811ECS/R
Note:
Reel quantity = 5000
-40C to +85C
PACKAGE
80-ball W-CSP
(Pb-free, Tape and reel)
MOISTURE
SENSITIVITY LEVEL
MSL1
PEAK SOLDERING
TEMPERATURE
260C
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PB, February 2011, Rev 2.0
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WM1811
Product Brief
PIN DESCRIPTION
A description of each pin on the WM1811 is provided below.
Note that a table detailing the associated power domain for every input and output pin is provided on the following page.
Note that, where multiple pins share a common name, these pins should be tied together on the PCB.
PIN NO
F4
H4
J1
F3
D9
E9, G9
NAME
ADCDAT1
ADCDAT2
ADCLRCLK1/
GPIO1
ADDR
AGND
AVDD1
E8 AVDD2
G3 BCLK1
K1 BCLK2
J8 CPCA
K8 CPCB
K9 CPGND
J9 CPVDD
K7 CPVOUTN
J7 CPVOUTP
H1 DACDAT1
G4 DACDAT2
E1 DBVDD1
J2 DBVDD2
H5 DBVDD3
G2 DCVDD
K5 DGND
A8 DMICCLK
G5 GPIO10/
LRCLK3
K4 GPIO11/
BCLK3
K2 GPIO6/
ADCLRCLK2
K3 GPIO8/
DACDAT3
J4 GPIO9/
ADCDAT3
H8 HP2GND
H6 HPOUT1FB
J6 HPOUT1L
J5 HPOUT1R
G8 HPOUT2N
H7 HPOUT2P
D7 IN1LN
D8 IN1LP
B9 IN1RN
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TYPE
Digital Output
Digital Input / Output
Digital Input / Output
Digital Input
Supply
Supply / Analogue
Output
Supply
Digital Input / Output
Digital Input / Output
Analogue Output
Analogue Output
Supply
Supply
Analogue Output
Analogue Output
Digital Input
Digital Input / Output
Supply
Supply
Supply
Supply / Analogue
Output
Supply
Digital Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Supply
Analogue Input
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Input
Analogue Input
Analogue Input
DESCRIPTION
Audio interface 1 ADC digital audio data
Audio interface 2 ADC digital audio data
Audio interface 1 ADC left / right clock /
General Purpose pin GPIO 1
2-wire (I2C) address select
Analogue ground (Return path for AVDD1)
Analogue core supply / LDO1 Output
Bandgap reference, analogue class D and FLL supply
Audio interface 1 bit clock
Audio interface 2 bit clock
Charge pump fly-back capacitor pin
Charge pump fly-back capacitor pin
Charge pump ground (Return path for CPVDD)
Charge pump supply
Charge pump negative supply decoupling pin (HPOUT1L, HPOUT1R)
Charge pump positive supply decoupling pin (HPOUT1L, HPOUT1R)
Audio interface 1 DAC digital audio data
Audio interface 2 DAC digital audio data
Digital buffer (I/O) supply (core functions and Audio Interface 1)
Digital buffer (I/O) supply (for Audio Interface 2)
Digital buffer (I/O) supply (for Audio Interface 3)
Digital core supply / LDO2 output
Digital ground (Return path for DCVDD, DBVDD1, DBVDD2, DBVDD3)
Digital MIC clock output
General Purpose pin GPIO 10 /
Audio interface 3 left / right clock
General Purpose pin GPIO 11 /
Audio interface 3 bit clock
General Purpose pin GPIO 6 /
Audio interface 2 ADC left / right clock
General Purpose pin GPIO 8 /
Audio interface 3 DAC digital audio data
General Purpose pin GPIO 9 /
Audio interface 3 ADC digital audio data
Analogue ground
HPOUT1L and HPOUT1R ground loop noise rejection feedback
Left headphone output
Right headphone output
Earpiece speaker inverted output
Earpiece speaker non-inverted output
Left channel single-ended MIC input /
Left channel negative differential MIC input
Left channel line input /
Left channel positive differential MIC input
Right channel single-ended MIC input /
Right channel negative differential MIC input
PB, February 2011, Rev 2.0
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Product Brief
PIN NO
C7
NAME
IN1RP
C8 IN2LN/
DMICDAT
C9 IN2LP/VRXN
B7 IN2RN
B8 IN2RP/VRXP
A4
F8
D6
C6
B6
A6
B5
C5
G1
J3
F1
F2
A9
A7
F9
A5
H2
H3
B2, C4
C2, D3
D5
A1, B1
B3, B4
C1, D1
C3, D4
A2, A3
D2, E2
E7
F7
LDO1ENA
LDO1VDD
LDO2ENA
LINEOUT1N
LINEOUT1P
LINEOUT2N
LINEOUT2P
LINEOUTFB
LRCLK1
LRCLK2
MCLK1
MCLK2
MICBIAS1
MICBIAS2
MICDET
REFGND
SCLK
SDA
SPKGND1
SPKGND2
SPKMODE
SPKOUTLN
SPKOUTLP
SPKOUTRN
SPKOUTRP
SPKVDD1
SPKVDD2
VMIDC
VREFC
TYPE
Analogue Input
Analogue Input /
Digital Input
Analogue Input
Analogue Input /
Digital Input
Analogue Input
Digital Input
Supply
Digital Input
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Input
Digital Input / Output
Digital Input / Output
Digital Input
Digital Input
Analogue Output
Analogue Output
Analogue Input
Supply
Digital Input
Digital Input / Output
Supply
Supply
Digital Input
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Supply
Analogue Output
Analogue Output
DESCRIPTION
Right channel line input /
Right channel positive differential MIC input
Left channel line input /
Left channel negative differential MIC input /
Digital MIC data input
Left channel line input /
Left channel positive differential MIC input /
Mono differential negative input (RXVOICE -)
Right channel line input /
Right channel negative differential MIC input
Left channel line input /
Left channel positive differential MIC input /
Mono differential positive input (RXVOICE +)
Enable pin for LDO1
Supply for LDO1
Enable pin for LDO2
Negative mono line output / Positive left or right line output
Positive mono line output / Positive left line output
Negative mono line output / Positive left or right line output
Positive mono line output / Positive left line output
Line output ground loop noise rejection feedback
Audio interface 1 left / right clock
Audio interface 2 left / right clock
Master clock 1
Master clock 2
Microphone bias 1
Microphone bias 2
Microphone & accessory sense input
Analogue ground
Control interface clock input
Control interface data input and output / acknowledge output
Ground for speaker driver (Return path for SPKVDD1)
Ground for speaker driver (Return path for SPKVDD2)
Mono / Stereo speaker mode select
Left speaker negative output
Left speaker positive output
Right speaker negative output
Right speaker positive output
Supply for speaker driver 1 (Left channel)
Supply for speaker driver 2 (Right channel)
Midrail voltage decoupling capacitor
Bandgap reference decoupling capacitor
WM1811
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