NJM2794
Ground Noise Isolation Amplifier
s
GENERAL DESCRIPTION
The
NJM2794
is a ground noise isolation amplifier designed
for car audio system. 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.
s
PACKAGE OUTLINE
NJM2794RB2
NJM2794V
s
FEATURES
q
Dual Channel Differential Amplifier
q
Operating Voltage
q
Operating Current
q
Common mode rejection ratio
q
Maximum Output Voltage
q
Supply Voltage Rejection Ratio
q
Total Harmonic Distortion
q
Noise Output Voltage
q
Bipolar Technology
q
Package Outline
s
BLOCK DIAGRAM
4.3 to 13V
14mA typ.
CMRR=60dB typ.
2Vrms min., @ THD=0.1%
60dB typ.
0.002% typ.
1.3µVrms typ.
TVSP10, SSOP14
V+
IN1-
OUT1
IN1+
Vref
IN2+
IN2-
OUT2
GND
–1–
NJM2794
s
ABSOLUTE MAXIMUM RANGES
PARAMETER
Supply Voltage
Maximum Input Voltage
(Ta=25°C)
RANGE
+15
0 to V
TVSP10 : 530*
SSOP14 : 550*
NOTE: EIA/JEDEC STANDARD Test board (76.2x114.3x1.6mm, 2layer, FR-4) mounting
+
(
✴
)
SYMBOL
V
+
UNIT
V
V
V
IM
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
mW
°C
°C
-40 to +85
-40 to +150
(✴) For the maximum input voltage less than 0 toV
+
s
ELECTRICAL CHARACTERRISTIC
(V =9V,Ta=25°C)
PARAMETER
DC CHARACTERRISTIC
Operating Voltage
Operating Current
Reference Voltage
Voltage Gain
Channel Separation
Channel Balance
Roll-off High Frequency
Input Resistance
Output Resistance
Maximum Output Voltage 1
Maximum Output Voltage 2
Maximum Output Voltage 3
Maximum Output Voltage 4
Noise Output Voltage
Total Harmonic Distortion
Common Mode
Rejection Ratio
Common Mode
Input Voltage
Supply Voltage
Rejection Ratio
V
+
+
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
4.3
No Signal
-
3.8
-1.0
f=1kHz
9
14
4.3
0.0
110
-
-
105
90
2.5
2.1
2.5
2.1
1.3
0.002
60
2
65
13
20
4.8
+1.0
-
0.5
-
125
-
-
-
-
-
2.5
0.01
-
-
-
V
mA
V
dB
dB
dB
kHz
kΩ
Ω
Vrms
Vrms
Vrms
Vrms
µVrms
%
dB
Vrms
dB
I
CC
V
REF
AC CHARACTERRISTIC
(Non-inverting circuit, f=1kHz, Vin=1Vrms, R
g
=0Ω, R
L
=10kΩ unless otherwise specified)
Gv
CS
BAL
f
RH
R
IN
R
OUT
V
OM1
V
OM2
V
OM3
V
OM4
V
NO
THD
CMRR
Vicm
SVR
90
-
100
85
-
-1dB
THD=0.1%, f = 1kHz
THD=0.1%, f = 1kHz, V =8V
Inverting,
THD=0.1%, f = 1kHz
Inverting,
+
THD=0.1%, f = 1kHz, V =8V
Rg=600Ω, A-weighted
f=1kHz , V
O
=1Vrms,
BW=400Hz to 30kHz
+
2
1.7
-
-
-
-
50
CMRR=50dB
f=100Hz , V
ripple
=100mVrms
-
55
–3–
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