NJM2754
4in-1out Audio Selector
with Isolation amplifier
!
GENERAL DESCRIPTION
The
NJM2754
is 4In-1out stereo audio Selector with ground
noise isolation amplifiers. It contains dual channel differential
amplifier.
It is developed for those car audio applications where long
connections between head unit and other components are
necessary and ground noise has to be eliminated.
!
FEATURES
•4in-1out
Stereo Audio Selector
•Operating
Voltage
•Operating
Current
•Common
mode rejection ratio
•Maximum
Output Voltage
•Supply
Voltage Rejection Ratio
•Total
Harmonic Distortion
•Noise
Output Voltage
•Bipolar
Technology
•Package
Outline
!
BLOCK DIAGRAM
IN1A+
IN1A-
IN1B+
IN1B-
IN2A+
Diff
IN2-
IN2B+
Diff
OUTA
!
PACKAGE OUTLINE
NJM2754V
4.3 to 12V
14mA(typ.)
CMRR=60dB typ.
2Vrms min., @ THD=0.1%
60dB typ.
0.003% typ.
1.7
µ
Vrms typ.
SSOP20
Diff
LOGIC
Diff
CNT1
CNT2
IN3A+
IN3-
IN3B+
IN4A+
Diff
OUTB
Diff
Ach
Diff
V＋
＋
IN4-
IN4B+
Diff
Bch
Vref
Vref
GND
Ver.2008-06-23
–1–
NJM2754
!
ABSOLUTE MAXIMUM RANGES
(Ta=25°C)
PARAMETER
Supply Voltage
Maximum Input Voltage
SYMBOL
V
+
RANGE
+15
0 to V
(
∗
)
SSOP20 : 700
(1)
950
(2)
(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
UNIT
V
V
V
IM
+
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
mW
°C
°C
-40 to +85
-40 to +150
!
ELECTRICAL CHARACTERRISTIC
(V
+
=9V,Ta=25°C)
PARAMETER
DCCHARACTERRISTIC
SYMBOL
+
TEST CONDITION
MIN.
4.3
TYP.
9
14
4.3
0.0
110
110
-
-
105
90
2.5
1.7
0.003
60
2
65
-
-
MAX.
12
20
4.8
+1.0
-
-
0.5
-
125
-
-
2.5
0.01
-
-
-
V
+
UNIT
V
mA
V
dB
dB
dB
dB
kHz
kΩ
Ω
Vrms
µVrms
%
dB
Vrms
dB
V
V
Operating Voltage
Operating Current
Reference Voltage
Voltage Gain
Cross Talk
Channel Separation
Channel Balance
Roll-off High Frequency
Input Resistance
Output Resistance
Maximum Output Voltage
Noise Output Voltage
Total Harmonic Distortion
Common Mode
Rejection Ratio
Common Mode
Input Voltage
Supply Voltage
Rejection Ratio
Switch-ON Voltage Level
Switch-OFF Voltage Level
V
I
CC
V
REF
No Signal
-
3.8
-1.0
AC CHARACTERRISTIC
(Non-inverting circuit, f=1kHz, Vin=1Vrms, R
g
=0Ω, R
L
=10kΩ unless otherwise specified
Gv
CT
CS
BAL
f
RH
R
IN
R
OUT
V
OM
V
NO
THD
CMRR
Vicm
SVR
V
CH
V
CL
CMRR=50dB
f=100Hz , V
ripple
=100mVrms
V
CNT
=High Level
V
CNT
=Low Level
THD=0.1%, f = 1kHz
Rg=600Ω, A-weighted
f=1kHz , V
IN
=1Vrms,
BW=400Hz to 30kHz
-1dB
f=1kHz,A-Weighted
f=1kHz,A-Weighted
100
90
-
100
85
-
2
-
-
50
-
55
2.3
-
0.8
–3–
ARM技术
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