NJM2505A
SINGLE ISOLATION AMPLIFIER
GENERAL DESCRIPTION
NJM2505A is the single isolation amplifier developed by the
video signal. It can remove the noise of a signal with isolation amplifier
and carries in the small package (MTP5), it is suitable for the interface
of the video signal of a car AV system.
FEATURES
Operating Voltage 4.5 to 9.0V
Input: Sync-tip Clamp
Common Mode Noise Rejection Ratio –55dBtyp.
Voltage Gain 0dBtyp.
Frequency Characteristics 0dBtyp.at 10MHz
Bipolar Technology
Package MTP5
PIN CONFIGURATION
1
5
PACKAGE OUTLINE
NJM2505AF
1: Vout
2: GND
3: V+
2
3
4
4: Vin
5: VGND
BLOCK DIAGRAM
Vout
GND
1
5
VGND
2
V
+
3
4
Vin
Ver.5
-1-
NJM2505A
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
+
P
D
Topr
Tstg
RATINGS
15.0
200
-40 to +85
-40 to +125
UNIT
V
MW
°C
°C
RECOMMENDED OPERATING CONDITION(Ta=25°C)
PARAMETER
Operating Voltage Range
SYMBOL
Vopr
TEST CONDITION
MIN.
4.5
TYP.
-
MAX.
9.0
UNIT
V
ELECTRICAL CHARACTERISTICS(
V
+
=5.0V, Ta=25°C)
PARAMETR
Supply Current
Maximum Output Voltage Level
Voltage Gain
Frequency Characteristics
Common Mode Noise
Rejection Ratio
Differential Gain
Differential Phase
SYMBOL
I
CC
Vom
Gv
Gf
CMR
DG
DP
TEST CONDITION
No Signal
Vin=100kHz,Sin-Signal,THD=1%,
Vin=100kHz,1.0Vp-p,Sin-Signal
Vin=10MHz / 1MHz ,1.0VppSin-Signal
Vin=20KHz,Vin=1Vpp
Vin=1.0Vp-p,10step Video Signal
Vin=1.0Vp-p,10step Video Signal
MIN.
-
2.0
-1.0
-1.0
-
-
-
TYP.
3.0
2.2
0
0
-55
0.3
0.4
MAX.
6.0
-
1.0
1.0
-
-
-
UNIT
mA
Vp-p
dB
dB
dB
%
deg
Ver.5
-2-
NJM2505A
TEST CIRCUIT
When CMR is measured, VGND is connected with VIN.
VGND
VIN
4.7uF
+
4.7uF
75Ω
+
50Ω
5
4
NJM2505A
1
2
0.1uF
22uF
+
+
10uF
2kΩ
3
VOUT
GND
VCC
Ver.5
-3-
NJM2505A
APPLICATION CIRCUIT
VGND
VIN
75Ω
input impedance
input impedance
+
4.7uF
4.7uF
+
5
4
NJM2505A
1
2
0.1uF
+
+
10uF
3
VOUT
GND
VCC
* NJM2505A don't built-in 75Ω driver circuit. This IC's load capability is than 2kΩ.
Please make adequate evaluation.
Ver.5
-4-
NJM2505A
APPLICATION
1: Please connect input surge resistance to 4pin(Vin) and 5pin(VGND). Please refer to Fig. 1. If resistance is
enlarged, a waveform may deteriorate.
Surge Diode
Surge Diode
4,5pin
Surge
Resistance
≈
100Ω
NJM2505A
Fig1: External connection
0.5
0.4
0.3
0.2
Gv(dB)
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
20
40
60
80
100
120
140
160
180
Input Resistance(ohm)
Fig2: Input resistance vs. Voltage gain
-40
-45
-50
-55
CMR(dB)
-60
-65
-70
-75
-80
0
20
40
60
80
100
120
140
160
180
Input Resistance(ohm)
Fig3: Input resistance vs. Common mode rejection ratio
Ver.5
-5-
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