NJM2573
LOW VOLTAGE 3ch VIDEO AMPLIFIER WITH LPF
GENERAL DESCRIPTION
The NJM2573
is a Low Voltage 3ch Video Amplifier with LPF.
Internal 75 driver is easy to connect TV monitor directly.
The NJM2573
corresponds to a clamp and bias inputs, and
selection of a clamp/ bias is possible for one circuit, and it
corresponds to various video signals.
PACKAGE OUTLINE
NJM2573V
FEATURES
Operating Voltage
Input type
2.8 to 5.5V
Vin1: CLAMP
Vin2: CLAMP/ BIAS
Vin3: BIAS
Internal LPF
Internal 6dB amplifier
Internal 75 Driver Circuit (2-system drive)
Internal Power Saving Circuit
Bipolar Technology
Package Outline
SSOP14
BLOCK
DIAGRAM
V
+
V
+
6dB
Vin1
CLAMP
6dB
Vin2
CLAMP/BIAS
SW
LPF
LPF
75
driver
Vout1
Vsag1
75
driver
Vout2
Vsag2
CLAMP
BIAS
6dB
75
driver
Vout3
Vin3
BIAS
LPF
GND
Power Save
GND
Ver.9
-1-
NJM2573
ABSOLUTE
MAXIMUM RATINGS
(Ta=25C)
PARAMETER
SYMBOL
+
Supply Voltage
V
Power Dissipation
P
D
Operating Temperature Range
Topr
Storage Temperature Range
Tstg
RATINGS
7.0
300
-40 to +85
-40 to +125
UNIT
V
mW
C
C
ELECTRICAL
CHARACTERISTICS
(V =3.0V,R
L
=150,Ta=25C)
PARAMETER
Operating Voltage
Operating Current
Operating Current
at Power Save
Maximum Output
Voltage Swing
Voltage Gain
SYMBOL
Vopr
I
CC
Isave
Vomv
Vom
RGB
Gv
Gfy4.5M
Low Pass Filter
Characteristic
Gfy8M
Gfy16M
Cross talk
Differential Gain
Differential Phase
S/N Ratio
CT
DG
DP
SNv
No Signal
Power Save Mode
f=1kHz,THD=1%, CLAMP Input
f=1kHz,THD=1%, BIAS Input
Vin=100kHz, 1.0Vp-p,Sin Signal (CLAMP)
Vin=100kHz 0.7Vp-p,Sin Signal (BIAS)
Vin=4.5MHz/100kHz, 1.0Vp-p(CLAMP)
Vin=4.5MHz/100kHz, 0.7Vp-p(BIAS)
Vin=8MHz/100kHz, 1.0Vp-p(CLAMP)
Vin=8MHz/100kHz, 0.7Vp-p(BIAS)
Vin=16MHz/100kHz, 1.0Vp-p(CLAMP)
Vin=16MHz/100kHz, 0.7Vp-p(BIAS)
Vin=4.43MHz, 1.0Vp-p,Sin Signal (CLAMP)
Vin=4.43MHz 0.7Vp-p,Sin Signal (BIAS)
(CLAMP) Vin=1.0Vp-p
Input 10step Video Signal
(CLAMP) Vin=1.0Vp-p
Input 10step Video Signal
(CLAMP) Vin=1.0Vp-p,100% White Video Signal
(BIAS) Vin=0.7Vp-p,100% Red field Signal
(CLAMP) Vin=1.0Vp-p, 3.58MHz,
Sin Signal, R
L
=75
(BIAS) Vin=0.7Vp-p, 3.58MHz,
Sin Signal, R
L
=75
TEST CONDITION
MIN.
2.8
-
-
2.2
1.4
6.0
-0.5
-
-
-
-
-
-
TYP.
3.0
18.0
60
2.4
2.2
6.4
0.0
-2.0
-12
-65
0.2
0.2
+60
MAX.
5.5
26.0
90
-
Vp-p
-
6.8
+0.5
-
-
-
-
-
-
dB
%
deg
dB
dB
dB
UNIT
V
mA
µA
+
2nd. Distortion
SW Change
Voltage High Level
SW Change
Voltage Low Level
CONTROL
TERMINAL
PARAMETER
Power Save
Hv
-
-40
-
+
dB
VthPH
VthPL
1.8
0
-
-
V
V
0.3
STATUS
H
L
OPEN
H
Power Save: ON
Power Save: OFF
Power Save: OFF
BIAS
CLAMP
CLAMP
NOTE
CLAMP/BIAS SW
L
OPEN
Ver.9
-3-
NJM2573
APPLICATION CIRCUIT (VIN2: CLAMP)
(1) Standard circuit
V+
0.1µF
+
(2) SAG correction unused circuit
10µF
33µF
+
V+
0.1µF
+
10µF
33µF
1
Vsag1
Vout1
14
75Ω
OUT1
1
+
Vsag1
Vout1
14
470µF 75Ω
+
OUT1
C1
2
V
+
1
V
+
2
13
2
V
+
1
V
+
2
13
0.1µF
IN1
75Ω
3
33µF
Vin1
NJM2573V
0.1µF
IN1
75Ω
75Ω
OUT2
(CLAMP)
4
3
Vsag2
12
+
Vin1
NJM2573V
Vsag2
12
470µF 75Ω
33µF
4
Power Save
Vout2
11
+
Power Save
C1
0.1µF
IN2
75Ω
10µF
6
5
Vout2
11
+
OUT2
(CLAMP)
Vin2
GND2
10
75Ω
OUT3
0.1µF
IN2
75Ω
10µF
6
+
5
Vin2
GND2
10
75Ω
OUT3
GND1
Vout3
9
GND1
Vout3
9
+
0.1µF
IN3
75Ω
7
Vin3
C/B SW
8
0.1µF
IN3
75Ω
7
Vin3
C/B SW
8
(3) Two-line driving circuit
V+
0.1µF
+
10µF
33µF
+
100µF
1
Vsag1
Vout1
14
+
OUT1
75Ω
OUT2
75Ω
C1
2
V
+
1
V
+
2
13
0.1µF
IN1
75Ω
3
33µF
Vin1
NJM2573V
Vsag2
12
+
100µF
4
Power Save
Vout2
11
+
75Ω
75Ω
OUT1
OUT2
(CLAMP)
C1
0.1µF
IN2
75Ω
10µF
6
5
Vin2
GND2
10
OUT1
75Ω
OUT2
75Ω
GND1
Vout3
9
+
0.1µF
IN3
75Ω
7
Vin3
C/B SW
8
(1) Standard circuit
The SAG correction reduces output coupling capacitor values.
The capacitor of C1 (33µF) is recommended for the portable application.
However, the 33µF capacitor may deteriorate SAG, and lose synchronization by luminance fluctuation.
Adjust the C1 value, checking the waveform containing a lot of low frequency components like a bounce
waveform (In case of worst condition). Change the capacitor of C1 into a large value to improve SAG.
(2) SAG correction unused circuit
Cancel the SAG correction to improve lost synchronization.
Connect the coupling capacitor after connecting the Vout pin and Vsag pin. The recommended value is 470µF or
more.
(3) Two-line driving circuit
The NJM2573 drives two-line load of 150Ω.
The capacitance value of C1 should be 100µF or more, because SAG is deteriorated than a standard circuit.
Ver.9
-5-
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