wm8904 Wolfson Microelectronics plc, wm8904 Datasheet - Page 5

• Manufacturer Part Number: wm8904
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
PIN DESCRIPTION
Note:
1. It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.
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IN1L / DMICDAT1
IN2L
IN3L
IN1R / DMICDAT2
IN2R
IN3R
MICBIAS
MICVDD
HPOUTL
HPOUTR
HPOUTFB
LINEOUTL
LINEOUTR
LINEOUTFB
CPVDD
CPGND
CPCA
CPCB
CPVOUTP
CPVOUTN
AVDD
AGND
VMIDC
DCVDD
DBVDD
DGND
MCLK
BCLK / GPIO4
LRCLK
DACDAT
ADCDAT
SCLK
SDA
GPIO1 / IRQ
GPIO2
GPIO3
GND_PADDLE
NAME
B3
A2
C3
A1
B2
C2
D1
E1
E3
E2
F3
F2
F1
D2
E6
F6
E5
F5
E4
F4
B1
C1
D3
D5
C6
D6
A4
C4
A5
A6
B5
B6
D4
C5
B4
A3
n/a
W-CSP 6×6
25
20
19
9
8
10
11
12
23
22
21
6
4
5
30
32
31
33
27
26
n/a
24
n/a
13
15
14
16
18
17
7
28
29
2
3
1
n/a
n/a
QFN-32
Analogue / Digital Input
Analogue Input
Analogue Input
Analogue / Digital Input
Analogue Input
Analogue Input
Analogue Output
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Supply
Supply
Analogue Input
Analogue Input
Analogue Output
Analogue Output
Supply
Supply
Supply
Supply
Supply
Digital Input
Digital Input / Output
Digital Input / Output
Digital Input
Digital Output
Digital Input
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Analogue Output
TYPE
Left channel input 1 /
Digital microphone data input 1
Left channel input 2
Left channel input 3
Right channel input 1 /
Digital microphone data input 2
Right channel input 2
Right channel input 3
Microphone bias
Microphone bias amp supply
Left headphone output (line or headphone
output)
Right headphone output (line or headphone
output)
Headphone output ground loop noise rejection
feedback
Left line output 1 (line output)
Right line output 1 (line output)
Line output ground loop noise rejection
feedback
Charge pump power supply
Charge pump ground
Charge pump flyback capacitor pin
Charge pump flyback capacitor pin
Charge pump positive supply decoupling
(powers HPOUTL/R, LINEOUTL/R)
Charge pump negative supply decoupling
(powers HPOUTL/R, LINEOUTL/R)
Analogue power supply (powers analogue
inputs, reference, ADC, DAC)
Analogue power return
Midrail voltage decoupling capacitor
Digital core supply
Digital buffer supply (powers audio interface
and control interface)
Digital ground (return path for DCVDD and
DBVDD)
Master clock for CODEC
Audio interface bit clock / GPIO4
Audio interface left / right clock (common for
ADC and DAC)
DAC digital audio data
ADC digital audio data
Control interface clock input
Control interface data input / output
GPIO1 / Interrupt
GPIO2
GPIO3
Die Paddle
Product Brief, Rev 3.0, February 2010
DESCRIPTION
WM8904
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