NJW1195
4-Channel Electronic Volume with Input Selector
■ GENERAL DESCRIPTION
■ PACKAGE OUTLINE
The NJW1195 is a 4-channel electronic volume with 4-in
2-out stereo audio selector. It performs low noise and low
distortion characteristics with resistance ladder circuit.
The NJW1195 is also available for 2-channel differential
transmission electronic volume with 2-in 1-out stereo audio
selector by a differential transmission select function.
All of functions are controlled via three-wired serial bus.
Selectable 4-Chip address is available for using four chips
on same serial bus line.
NJW1195V
It’s suitable for two-channel stereo system and or
multi-channel audio system.
■ FEATURES
■ Operating Voltage
±4.5 to ±7.5V
■ 3-Wired Serial Control
■ Selectable 4-Chip Address
■ Low Output Noise
Chip Address Select Function
Available for using four chips on same serial bus line
-118dBV typ.
■ Low Distortion
0.0003% typ. at Vin=1Vrms (Differential transmission)
■ 4in 2out Stereo Signal Selector
■ Volume
+31.5 to –95dB / 0.5dB step, Mute
-120dB typ.
■ Differential transmission select function
■ Channel Separation
■ Zero Cross Detection
■ Bi-CMOS Technology
■ Package Outline
SSOP32
■ BLOCK DIAGRAM
Application example 2
Application example 1
2-channel differential transmission electronic volume with
2-in 1-out stereo audio selector (DIFF pin = High)
4-channel electronic volume
with 4-in 2-out stereo audio selector (DIFF pin = Low)
4-input 2-output
stereo selector
(Single)
2-input 1-output
stereo selector
(Differential)
4-channel Electronic Volume (Single)
Main Volume :+31.5 to -95dB / 0.5dBstep
2-channel Electronic Volume (Differential)
Main Volume :+31.5 to -95dB / 0.5dBstep
InA1
InA2
InA3
InA1+
Out1A
InA1-
OutA+
OutA-
InA4
Mute
Mute
Mute
Mute
InA2+
InA2-
Mute
Out2A
Out1B
InB1
InB2
InB3
InB4
InB1+
InB1-
OutB+
OutB-
InB2+
InB2-
Out2B
Mute
DIFF=High
Zero Cross
Detection
Zero Cross
Detection
DIFF=Low
Control Logic
Control Logic
Data
Latch
ADR1
ADR0
Data
Latch
ADR1
ADR0
Clock
Clock
Ver 1.2 for web