wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 8

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
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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PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
9
IRQ / GPIO1
SCLK
SDA
DBVDD
DGND
DCVDD
CPVDD
CPCA
CPGND
CPCB
CPVOUTP
CPVOUTN
HPOUTL
HPOUTFB
HPOUTR
LINEOUTL
LINEOUTFB
LINEOUTR
MICVDD
MICBIAS
VMIDC
AGND
AVDD
IN2R
IN1R /
DMICDAT2
IN2L
IN1L /
DMICDAT1
MCLK
BCLK / GPIO4
LRCLK
AIFTXDAT
AIFRXDAT
NAME
Digital Input / Output
Digital Input
Digital Input / Output
Supply
Supply
Supply
Supply
Analogue Output
Supply
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Input
Analogue Output
Analogue Output
Analogue Input
Analogue Output
Supply
Analogue Output
Analogue Output
Supply
Supply
Analogue Input
Analogue / Digital
Input
Analogue Input
Analogue / Digital
Input
Digital Input
Digital Input / Output
Digital Input / Output
Digital Output
Digital Input
TYPE
Interrupt / GPIO1
Control interface clock input
Control interface data input / output
Digital buffer supply (powers audio interface and control
interface)
Digital core supply
Charge pump power supply
Charge pump flyback capacitor pin
Charge pump ground
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)
Left headphone output (line or headphone output)
Headphone output ground loop noise rejection feedback
Right headphone output (line or headphone output)
Left line output 1 (line output)
Right line output 1 (line output)
Microphone bias amp supply
Microphone bias
Midrail voltage decoupling capacitor
DAC)
Right channel input 2
Right channel input 1 /
Digital microphone data input 2
Left channel input 1 /
Digital microphone data input 1
Master clock
Audio interface bit clock / GPIO4
Audio interface left / right clock (common for TX and RX)
TX digital audio data (digital microphone data)
RX digital audio data (DAC digital playback data)
Digital ground (return path for DCVDD and DBVDD)
Line output ground loop noise rejection feedback
Analogue power return
Analogue power supply (powers analogue inputs, reference,
Left channel input 2
DESCRIPTION
PD, Rev 4.0, September 2010
Production Data
8