Harman Kardon AVR 3600 Service Manual page 114

AVR3600
8-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR
GENERAL DESCRIPTION
The NJW1298 is a 8-channel electronic volume with
Input Selector.
selector , REC Output and Multi-channel inputs.
The NJW1298 performs low noise and low distortion
characteristics with resistance ladder circuit.
All of functions are controlled via three-wired serial bus.
Selectable 2-Chip address is available for using two chips
on same serial bus line.
The NJW1298 is suitable for multi-channel audio system,
such as AV amplifier, DVD receiver, and others.
FEATURES
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Operating Voltage
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3-Wired Serial Control
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13-input 4-output stereo selector
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Multi-Channel input (8ch x 2)
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Input Selector Gain Control
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Volume
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SWch, Cch, LS/RSch output addition to L/R ch output
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LB/RBch output addition to LS/RS ch output
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Zero Cross Detection
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Bi-CMOS Technology
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Package Outline
BLOCK DIAGRAM
REC_A
REC_B
REC_C
Main
REC_A
REC_B
REC_C
Main
Stereo Lin
(×13)
Stereo Rin
(×13)
Main
REC_C
REC_B
REC_A
Main
REC_C
REC_B
REC_A
It includes 13-in 4-out stereo audio
±4.5 to ±7.5V
Chip Address Select Function
Gain : 0 to -21dB / 3dB step
+31.5 to –95dB / 0.5dB step, Mute
QFP100-U1
+
Input Selector Gain:
0 to -21dB / 3dB step
+
Multi-Cin
Lout for
ADC
Multi-LSin
Rout for
ADC
Multi-RSin
Multi-LBin
Multi-RBin
Multi-SWin
Main Volume:
+31.5 to -95dB/0.5dB step
114
harman/kardon
NJW1298
PACKAGE OUTLINE
NJW1298FU1
Zero Cross Detection (8ch)
Control Logic
DataClock LatchADR Mute
Lout
Rout
Cout
LSout
RSout
LBout
RBout
SWout