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U25 WM8739
ADD
CONTROL INTERFACE
VMID
AGND
VOL/
RLINEIN
ADC
MUTE
VOL/
ADC
LLINEIN
MUTE
IC403 BU1923F
MUX
4
-
+
anti-aliasing
filter
VREF
3
VDD1
5
ANALOG
POWER SUPPLY
VSS1
6
PLL
PLL
57KHz
1187. 5Hz
VDD2
12
RDS/ARI
DIGITAL
POWER BUPPLY
VSS2
11
REFERENCE
CLOCK
13
14
XI
XO
ADCDAT
DIGITAL
ADCLRC
FILTERS
BCLK
OSC
DIV2
VSS3
CMP
7
8
8th switched
capacitor filter
comparator
RCLK
16
QUAL
1
DIPHASE
DIFFERENTAL
RDATA
DECODER
DECODER
2
MEASAREMENT
CIRCUIT
10
9
T1
T2
69
IC801 LM78L05ACZ
INPUT
1
CURRENT
GENERATOR
STARTING
REFERENCE
CIRCUIT
VOLTAGE
IC802, IC803 BA05ST
VCC
REFERENCE
2
VOLTAGE
CTL
1
GND
3
U31 WM8746EDS
ML/12S MC/IWL MD/DM
SCKI
CONTROL
INTERFACE
BCKIN
LRCIN
LRCIN2
DAC
AUDIO
CHANNEL
INTERFACE
CONTROL
DIN0
DIN1
DIN2
DGND
DVDD
SERIES
OUTPUT
PASS
2
ELEMENT
SOA
PROTECTION
ERROR
AMPLIFIER
THERMAL
PROTECTION
GND
3
-
+
OUT
4
+
C
5
MODE
MUTE
L0A [7:0]
Sigma
OUT0L
Stereo
Digital
Delta
GR0
Filter
DAC
Modulator
OUT0R
R0A [7:0]
L1A [7:0]
Sigma
OUT1L
Stereo
Digital
Delta
GR1
DAC
Filter
Modulator
OUT1R
R1A [7:0]
L2A [7:0]
Sigma
OUT2L
Digital
Stereo
Delta
GR2
DAC
Filter
Modulator
OUT2R
R2A [7:0]
AGND2
AVDD1
AVDD2
CAP
AGND1
70
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