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IC BLOCK DIAGRAM & DESCRIPTION
IC109 WM8761ED (Stereo DAC)
3
BCKIN
AUDIO
1
LRCIN
INTERFACE
2
DIN
PIN
1
LRCIN
2
DIN
3
BCKIN
4
NC
5
CAP
6
VOUTR
7
GND
8
VDD
9
VOUTL
10
MUTE
11
NC
12
DEEMPH
13
FORMAT
14
MCLK
Note:
1. Digital input pins have Schmitt trigger input buffers.
13
10 12
CONTROL
INTERFACE
MUTE
DIGITAL FILTERS
MUTE
14
NAME
TYPE
Digital input
Digital input
Digital input
No connect
Analogue output
Analogue output
Supply
Supply
Analogue outpur
Digital input
No connect
Digital input
Digital input
Digital input
SIGMA
DAC
DELTA
MODULATOR
SIGMA
DAC
DELTA
MODULATOR
8
DESCRIPTION
Sample rate clock input
Serial audio data input
Bit clock input
No internal connection
Analogue internal reference
Right channel DAC output
Negative supply
Positive supply
Left channel DAC output
Soft mute control, Internal pull down
High Impedance = Automute
High = Mute ON
Low = Mute OFF
No internal connection
De-emphasis select, Internal pull up
High = de-emphasis ON
Low = de-emphasis OFF
Data input format select, Internal pull up
Low = 24-bit right justified or DSP 'late'
2
High = 16-24-bit I S or DSP 'early'
Master clock input
- 13 -
LOW
PASS
6 VOUTR
FILTER
LOW
PASS
9 VOUTL
FILTER
5
CAP
7
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