NJRC NJM2578

NJM2578
LOW VOLTAGE VIDEO AMPLIFIER WITH LPF
■GENERAL DESCRIPTION
The NJM2578 is a Low Voltage Video Amplifier contained LPF
circuit. Internal 75Ω driver is easy to connect TV monitor directly.
The NJM2578 features low power and small package, and is
suitable for low power design on downsizing of DSC and DVC.
■PACKAGE OUTLINE
NJM2578KJ1
■FEATURES
● Operating Voltage
2.8 to 5.5V
● Input coupling capacitor is not necessary
● 12dB amplifier
● Internal LPF
-23dB at 23.5MHz typ.
● Internal 75Ω Driver Circuit (2-system drive)
● Power Save Circuit
● Bipolar Technology
● Package Outline
SON6
■BLOCK DIAGRAM
V+
6
12dB
Vin 4
75Ω
Driver
LPF
2 Vout
3 Vsag
5
GND
1
Pow er Save
-1-
NJM2578
■ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
SYMBOL
+
V
PD
Topr
Tstg
RATINGS
7.0
150
-40 to +85
-40 to +125
UNIT
V
mW
°C
°C
+
■ELECTRICAL CHARACTERISTICS (V =3.0V,RL=150Ω,Ta=25°C)
PARAMETER
SYMBOL
Operating Voltage
Vopr
Operating Current
ICC
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
2.8
3.0
5.5
V
No Signal
-
9.0
12.0
mA
Operating Current at Power Save
Isave
Power Save Mode
-
10
25
uA
Maximum Output Voltage Swing
Vomv
f=100kHz,THD=1%
2.2
2.6
-
Vp-p
12.0
12.4
12.8
dB
-0.95
-0.45
0.05
Voltage Gain
Low Pass Filter Characteristic
Vin=100kHz, 0.5Vp-p,
Input Sine Signal
Gfy4.5M Vin=4.5MHz/100kHz, 0.5Vp-p
Gv
Gfy8M
Vin=8MHz/100kHz, 0.5Vp-p
-
-3.0
-
Gfy19M
Vin=19MHz/100kHz, 0.5Vp-p
-
-23
-17
dB
Differential Gain
DG
Vin=0.5Vp-p, 10step Video Signal
-
0.5
-
%
Differential Phase
DP
Vin=0.5Vp-p, 10step Video Signal
-
0.5
-
deg
S/N Ratio
SNv
-
+60
-
dB
-
-60
-
dB
1.8
-
V
0
-
0.3
2nd. Distortion
Hv
Vin=0.5Vp-p, RL=75Ω
100% White Video Signal,
100KHz to 6MHz
Vin=0.5Vp-p, 3.58MHz,Sine Signal,
RL=75Ω
SW Change Voltage High Level
VthPH
Active
SW Change Voltage Low Level
VthPL
Non-active
■CONTROL TERMINAL
PARAMETER
Power Save
-2-
STATUS
NOTE
H
Power Save: OFF
L
Power Save: ON
OPEN
Power Save: ON
+
V
NJM2578
■TEST CIRCUIT
in
GND
0.1u
10u
V+
+
330Ω
GND
6
5
4
V+
GND
Vin
NJM２５７８
Vps
PS
Vout
Vsag
1
2
3
100u
+
22u
75Ω
+
out1
out2
75Ω
Please input the signal, which made the bottom end of a waveform the GND level.
Please do not set an input terminal to OPEN at non-signal.
-3-
NJM2578
■ EQUIVARENT CIRCUIT
PIN No.
SYNBOL
1
Power Save
INSIDE EQUIVARENT CIRCUIT
PS
32k
48k
GND
2
Vout
+
V
16.2k 750
Vout
GND
3
+
V
Vsag
Vsag
16.2k 750
GND
+
4
V
Vin
36k
Vin
25k
GND
-4-
5
GND
6
V+
NJM2578
■ TYPICAL CHRACTERISTICS
Supply Current vs. Supply Voltage
Supply Current at Power Save Mode vs. Supply Voltage
(No Signal)
14
(No Signal)
60
13
50
12
40
Isave[uA]
Icc[mA]
11
10
30
9
20
8
10
7
0
6
2
3
4
5
+
V [V]
6
7
2
8
Maximum Output Voltage Swing vs. Supply Voltage
(f=100kHz,THD=1%)
3
4
5
+
V [V]
6
7
8
Voltage Gain vs. Supply Voltage
(vin=100kHz,0.5Vpp sine-signal)
14.0
6.0
13.5
5.0
Gv[dB]
Vomv[Vp-p]
13.0
4.0
12.5
3.0
12.0
2.0
11.5
11.0
1.0
2
3
4
5
+
V [V]
6
7
2
8
LPF Characteristic vs. Supply Voltage
(vin=4.5MHz/100kHz,0.5Vpp)
3
4
5
+
V [V]
6
7
8
LPF Characteristic vs. Supply Voltage
(vin=8MHz/100kHz,0.5Vpp)
0.5
2
0
0.0
Gfy8M[dB]
-0.5
Gfy
4.5M
[dB]
-2
-4
-6
-1.0
-8
-1.5
-10
2
3
4
5
V [V]
+
6
7
8
2
3
4
5
+
V [V]
6
7
8
-5-
NJM2578
■ TYPICAL CHRACTERISTICS
LPF Characteristic vs. Supply Voltage
(vin=19MHz/100kHz,0.5Vpp)
-10
Differential Gain vs. Supply Voltage
(vin=0.5Vpp,10Step signal)
5.0
-15
4.0
3.0
-25
DG[%]
Gfy23.5M[dB]
-20
-30
2.0
-35
1.0
-40
-45
0.0
2
3
4
5
+
V [V]
6
7
8
2
Differential Phase vs. Supply Voltage
(vin=0.5Vpp,10Step-signal)
5.0
3
4
5
+
V [V]
6
7
8
S/N Ratio vs.Supply Voltage
(vin=0.5Vpp,RL=75ohm,100% White-video-sgnal,100kHz-6MHz)
100
90
4.0
80
SNv[dB]
DP[deg]
3.0
2.0
70
60
1.0
50
0.0
40
2
3
4
5
+
V [V]
6
7
8
2
nd
2 .Distortion vs. Supply Voltage
0
(vin=0.5Vpp,3.58MHz, Sine-Signal
3
4
5
+
V [V]
6
7
8
SW Change Voltage vs.Supply Voltage
RL=75ohm)
3.0
2.5
-20
2.0
Vth[V]
Hv[dB]
-40
1.5
VthH
-60
1.0
-80
0.5
0.0
-100
2
-6-
VthL
3
4
5
+
V [V]
6
7
8
2
3
4
5
V+[V]
6
7
8
NJM2578
■ TYPICAL CHRACTERISTICS
Supply Current vs. Temperature
+
(V =3V No Signal)
Supply Current at Power Save Mode vs. Temperature
+
(V =3V No Signal)
14
60
13
50
12
40
Isave[uA]
Icc[mA]
11
10
9
30
20
8
10
7
6
0
-50
0
50
100
-50
0
50
T[Co]
T[Co]
Maximum Output Voltage Swing vs. Temperature
+
(V =3V, f=100kHz THD=1%)
Voltage Gain vs. Temperature
(vin=100kHz 0.5Vpp sine signal)
6.0
14.0
100
13.5
5.0
Gv[dB]
Vomv[Vp-p]
13.0
4.0
12.5
3.0
12.0
2.0
11.5
11.0
1.0
-50
0
50
-50
100
0
50
100
o
T[C ]
o
T[C ]
LPF Characteristics vs. Temperature
+
(V =3V, vin=4.5MHz/100kHz 0.5Vpp)
LPF Characteristics vs. Temperature
+
(V =3V, vin=8MHz/100kHz 0.5Vpp)
0.5
2
0
0.0
Gfy8M[dB]
Gfy4.5M[dB]
-2
-0.5
-4
-6
-1.0
-8
-1.5
-10
-50
0
50
o
T[C ]
100
-50
0
50
100
T[Co]
-7-
NJM2578
■ TYPICAL CHRACTERISTICS
LPF Characteristics vs. Temperature
+
(V =3V, vin=19MHz/100kHz 0.5Vpp)
Differential Gain vs. Temperature
+
(V =3V, vin=0.5Vpp 10Step-signal)
5.0
-10
-15
4.0
3.0
-25
DG[%]
Gfy 23.5M[dB]
-20
-30
2.0
-35
1.0
-40
-45
0.0
-50
0
50
100
-50
0
T[Co]
50
100
o
T[C ]
Differential Phase vs. Temperature
+
(V =3V, vin=0.5Vpp 10Step-signal)
S/N Ratio vs. Temperature
(V+=3V, RL=75ohm,vin=0.5Vpp White Video Signal 100kHz to 6MHz)
100
5.0
90
4.0
80
SNv[dB]
DP[deg]
3.0
2.0
70
60
1.0
50
0.0
40
-50
0
50
100
-50
0
T[Co]
nd
+
2
50
100
o
T[C ]
Distortion vs. Temperature
SW Change Voltage vs. Temperature
(V =3V, RL=75ohm, vin=0.5Vpp 3.58MHz sine-signal)
3.0
0
2.5
-20
2.0
Vth[V]
Hv[dB]
-40
1.5
VthH
VthL
-60
1.0
-80
0.5
-100
0.0
-50
0
50
T[Co]
-8-
100
-50
0
50
T[Co]
100
NJM2578
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
-9-