NJM2755
4-Input / 1-Output Stereo Audio Selector
s
GENERAL DESCRIPTION
The
NJM2755
is 4 Input / 1 Output Stereo Audio Selector.
The
NJM2755
consists of switches and buffer operational
amplifiers.
Based on the internal switch op-amp technology, the
NJM2755
features lower output noise, lower distortion and
higher channel separation than the general Multiplexers or
Analogue Switches.
The
NJM2755
contains compatibility with NJM2752(2in-1out
SW),NJM2753(3in-1out SW).
s
APPLICATIONS
qLCD-TV/PDP-TV
qCar
Stereo
qAny
Audio System
s
FEATURES
q
Operating Voltage
4.7 to 10V
q
4 Input / 1 Output Stereo Audio Selectors
q
Low Output Noise
-114dBV typ.
q
Low Distortion
0.0009% typ.
q
Bipolar Technology
q
Package Outline
SSOP16
s
PACKAGE OUTLINE
NJM2755V
s
BLOCK DIAGRAM
IN1A
IN1B
IN2A
IN2B
LOGIC
CNT1
CNT2
OUTA
IN3A
OUTB
IN3B
IN4A
IN4B
Vref
V＋
＋
Vref
GND
Ver.1.1
-1-
NJM2755
s
PIN CONFIGURATIONS
NJM2755 SSOP16
SSOP16
1
OUTA
IN1A
V+
IN2A
CNT1
IN3A
CNT2
IN4A
OUTB
16
NJM2755V
2
IN1B
GND
IN2B
Vref
IN3B
N.C
IN4B
15
3
14
4
13
5
12
6
11
7
10
8
9
PIN.No.
1
2
3
4
5
6
7
8
SYMBOL
OUTA
IN1A
V+
IN2A
CNT1
IN3A
CNT2
IN4A
FUNCTION
Ach Output Terminal
Ach Input Terminal1
Power Supply Terminal
Ach Input Terminal2
Control Switch Terminal1
Ach Input Terminal3
Control Switch Terminal2
Ach Input Terminal4
PIN.No.
9
10
11
12
13
14
15
16
SYMBOL
IN4B
N.C
IN3B
Vref
IN2B
GND
IN1B
OUTB
FUNCTION
Bch Input Terminal4
No Connection
Bch Input Terminal3
Reference Terminal
Bch Input Terminal2
GND Terminal
Bch Input Terminal1
Bch Output Terminal
[Reference]
The NJM2755 contains compatibility with NJM2752 (2in-1out SW),NJM2753 (3in-1out SW).
NJM2752
NJM2753
1
OUTA
OUTB
14
1
OUTA
OUTB
14
NJM2752V
NJM2753V
2
IN1A
V+
IN2A
CNT1
N.C
N.C
IN1B
GND
IN2B
Vref
N.C
N.C
13
2
IN1A
V+
IN2A
CNT1
IN3A
CNT2
IN1B
GND
IN2B
Vref
IN3B
N.C
13
3
12
3
12
4
11
4
11
5
10
5
10
6
9
6
9
7
8
7
8
-2-
NJM2755
s
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
Supply Voltage
V
+
RATING
12
SSOP16
1)
490
2)
630
UNIT
V
Power Dissipation
P
D
NOTE 1): EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
2): EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 4layer, FR-4) mounting
mW
Operating Temperature Range
Storage Temperature Range
T
OPR
T
STR
-40 to +85
-40 to +150
°C
°C
s
ELECTRICAL CHARACTERISTICS ( Ta=25°C, V =9V)
PARAMETER
Operating Voltage
Supply Current
Reference Voltage
Voltage Gain
Total Harmonic Distortion
Output Noise Voltage
Maximum Output Voltage
Cross Talk
Channel Separation
Switch-ON Voltage Level
Switch-OFF Voltage Level
Input Impedance
Output Impedance
s
SWITCH CONTROL LOGIC
CNT2 CNT1 INPUT SELECTOR Ach / Bch
L
L
H
H
L
H
L
H
1
2
3
4
SYMBOL
V
+
+
TEST CONDITION
No Signal
Vin=1Vrms, f=1kHz
Vin=1Vrms, f=1kHz
A-Weighted
f=1kHz, THD=1%
Vin=1Vrms, f=1kHz,
A-Weighted
Vin=1Vrms, f=1kHz,
A-Weighted
MIN.
4.7
-
-
-1
-
-
-
6
(2.0)
85
90
2.4
-
-
-
TYP.
9.0
10
4.5
0
0.0009
-114
(2)
8
(2.5)
100
110
-
-
100
45
MAX.
10
15
-
1
0.03
-100
(10)
-
-
-
-
0.5
-
-
UNIT
V
mA
V
dB
%
dBV
(µVrms)
dBV
(Vrms)
dB
dB
V
V
kΩ
Ω
I
CC
V
REF
G
V
THD+N
V
NO
V
OM
CT
CS
V
CH
V
CL
R
IN
R
OUT
-3-
NJM2755
s
TERMINAL DESCRIPTION
PIN
No.
2
4
6
8
9
11
13
15
SYMBOL
IN1A
IN2A
IN3A
IN4A
IN4B
IN3B
IN2B
IN1B
FUNCTION
Ach Input Terminal1
Ach Input Terminal2
Ach Input Terminal3
Ach Input Terminal4
Bch Input Terminal4
Bch Input Terminal3
Bch Input Terminal2
Bch Input Terminal1
EQUIVALENT CIRCUIT
TERMINAL
VOLTAGE
V+/2
650
100k
3p
5
7
CNT1
CNT2
Control Switch Terminal1
Control Switch Terminal2
0V (GND)
CNT
650
100k
1
16
OUTA
OUTB
Ach Output Terminal
Bch Output Terminal
OUTA
OUTB
V+/2
45
100k
12
Vref
Reference Terminal
V+/2
VREF
50k
650
50k
3
14
V+
GND
Power Supply Terminal
GND Terminal
V
+
V+
0V
12k
GND
-4-
NJM2755
s
MEASUREMENT CIRCUIT
10
µ
F
+
1
OUTA
OUTB
16
+
10
µ
F
10
µ
F
10
µ
F
+
3
V+
IN2A
CNT1
IN3A
CNT2
IN4A
NJM2755
+
2
IN1A
IN1B
GND
IN2B
Vref
IN3B
N.C
IN4B
15
+
14
+
100
µ
F
10
µ
F
+
10
µ
F
10
µ
F
10
µ
F
4
13
5
12
+
10
µ
F
+
+
6
11
7
10
+
10
µ
F
+
10
µ
F
8
9
-5-
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