WM8728
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PIN CONFIGURATION
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
LRCIN
DIN
1
2
3
4
5
6
7
20
19
18
17
16
15
14
LATI2S
XWM8728EDS
-25 to +85oC
20-pin SSOP
SCKDSD
SDIDEM
MUTEB
MODE
BCKIN
MCLK
ZERO
DGND
DVDD
WM8728
CSBIWL
VREFP
VOUTR
AGND
AVDD
8
13
12
11
VREFN
VMID
9
10
VOUTL
PIN DESCRIPTION
PIN
NAME
TYPE
DESCRIPTION
1
LRCIN
Digital Input
DAC Sample Rate Clock Input: PCM Input Mode
Right Channel DSD Bitstream Input: DSD Input Mode
Serial Audio Data Input: PCM Input Mode
Left Channel DSD Bitstream Input: DSD Input Mode
Audio Data Bit Clock Input
2
DIN
Digital Input
3
4
BCKIN
MCLK
Digital Input
Digital Input
Digital Output (Open drain)
Supply
Master Clock Input
5
ZERO
Infinite ZERO Detect Flag
6
DGND
DVDD
VOUTR
AGND
AVDD
Digital Ground Supply
7
Supply
Digital Positive Supply
8
Analogue Output
Supply
Right Channel DAC Output
9
Analogue Ground Supply
10
11
12
13
14
15
Supply
Analogue Positive Supply
VOUTL
VMID
Analogue Output
Analogue Output
Supply
Left Channel DAC Output
Mid Rail Decoupling Point
VREFN
VREFP
CSBIWL
DAC Negative Reference – normally AGND, must not be below AGND
DAC Positive Reference – normally AVDD, must not be above AVDD
Software Mode: 3-Wire Serial Control Chip Select
Hardware Mode: Input Word Length
Supply
Digital Input
(pull-up)
16
17
18
MODE
MUTEB
SDIDEM
Digital Input (pull-down)
Digital Bi-directional
Digital Bi-directional
Control Mode Selection (L = Hardware, H = Software)
Mute Control (L = Mute on, H = Mute off, Z = Automute Enabled)
Software Mode: 3 or 2-Wire Serial Control Data Input:
Hardware Mode: De-Emphasis Select
19
20
SCKDSD
LATI2S
Digital Input
(pull-down)
Software Mode: 3 or 2-Wire Serial Control Clock Input
Hardware Mode: DSD Bitstream Operation Select
Software Mode 3-Wire Serial Control Load Input
Hardware Mode: Input Data Format Selection
Digital Input
(pull-up)
Note:
Digital input pins have Schmitt trigger input buffers.
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
2
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
