Ic Internal Block Diagrams - Philips DVDR3590H Service Manual

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8.

IC Internal Block Diagrams

8.1 Analog Board
IC7202 - CS4344 – Digital To Analogue Converter
BLOCK DIAGRAM
De-emphasis
Serial Audio
Input
Interface
PIN DESCRIPTION AND CONFIGURATION
Pin Name #
SDIN 1 Serial Audio Data Input (Input) - Input for two's complement serial audio data.
2 De-Emphasis/External Serial Clock Input (Input) - used for de-emphasis filter control or external serial
DEM/SCLK
clock input.
3 Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the serial audio
LRCK
data line.
MCLK 4 Master Clock (Input) - Clock source for the delta-sigma modulator and digital filters.
VQ 5 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling
6
FILT+
circuits.
7 Left Channel Analog Output (Output) - The full scale analog output level is specified in the Analog Char-
AOUTL
acteristics specification table.
GND 8 Ground (Input) - ground reference.
VA 9 Analog Power (Input) - Positive power for the analog and digital sections.
10 Right Channel Analog Output (Output) - The full scale analog output level is specified in the Analog
AOUTR
Characteristics specification table.
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IC Internal Block Diagrams
Interpolation
Filter
Interpolation
PCM
Filter
Serial
SDIN
1
DEM/SCLK
2
LRCK
3
MCLK
4
VQ
5
3139 785 32804
3.3 V or 5 V
Multibit
∆Σ Modulator
Multibit
∆Σ Modulator
Figure 8-1
10 AOUTR
VA
9
GND
8
AOUTL
7
FILT+
6
Pin Description
8. EN 129
Switched
Capacitor
Left
DAC and
Output
Filter
Switched
Capacitor
Right
DAC and
Output
Filter
Internal
Voltage
Reference