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NJM2578
LOW VOLTAGE VIDEO AMPLIFIER WITH LPF
sGENERAL DESCRIPTION The NJM2578 is a Low Voltage Video Amplifier contained LPF circuit. Internal 75 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.
sPACKAGE OUTLINE
NJM2578KJ1
sFEATURES q Operating Voltage 2.8 to 5.5V q Input coupling capacitor is not necessary q 12dB amplifier q Internal LPF -23dB at 23.5MHz typ. q Internal 75 Driver Circuit (2-system drive) q Power Save Circuit q Bipolar Technology q Package Outline SON6
sBLOCK DIAGRAM
V+ 6 75 Driver 2 Vout
12dB
Vin 4
LPF
3 Vsag
5 GND
1 Pow er Save
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NJM2578
sABSOLUTE MAXIMUM RATINGS (Ta=25C) 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
sELECTRICAL CHARACTERISTICS (V =3.0V,RL=150,Ta=25C) PARAMETER Operating Voltage Operating Current Operating Current at Power Save Maximum Output Voltage Swing Voltage Gain SYMBOL Vopr ICC Isave Vomv Gv No Signal Power Save Mode f=100kHz,THD=1% TEST CONDITION MIN. TYP. MAX. UNIT V mA uA Vp-p dB
2.8
2.2 12.0 -0.95 1.8 0
3.0
9.0 10 2.6 12.4 -0.45 -3.0 -23 0.5 0.5 +60 -60 -
5.5
12.0 25 12.8 0.05 -17 V
+
Vin=100kHz, 0.5Vp-p, Input Sine Signal Gfy4.5M Vin=4.5MHz/100kHz, 0.5Vp-p Gfy8M Gfy19M DG DP SNv Hv VthPH VthPL Vin=8MHz/100kHz, 0.5Vp-p Vin=19MHz/100kHz, 0.5Vp-p Vin=0.5Vp-p, 10step Video Signal Vin=0.5Vp-p, 10step Video Signal Vin=0.5Vp-p, RL=75 100% White Video Signal, 100KHz to 6MHz Vin=0.5Vp-p, 3.58MHz,Sine Signal, RL=75 Active Non-active
Low Pass Filter Characteristic Differential Gain Differential Phase S/N Ratio 2nd. Distortion SW Change Voltage High Level SW Change Voltage Low Level sCONTROL TERMINAL PARAMETER Power Save
dB % deg dB dB V
0.3
STATUS H L OPEN Power Save: OFF Power Save: ON Power Save: ON
NOTE
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NJM2578
sTEST CIRCUIT
in GND 0.1u 10u
+
V+
330 GND
6 V+
5 GND
4 Vin
NJM
PS 1 Vps 100u
+
Vout 2
Vsag 3 22u
+
out1 out2
75 75
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.
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NJM2578
s EQUIVARENT CIRCUIT
PIN No. 1
SYNBOL Power Save
INSIDE EQUIVARENT CIRCUIT
PS
32k
48k GND
2
Vout
V
+
16.2k 750
Vout
GND
3
Vsag
V
+
Vsag 16.2k 750
GND
4
Vin
36k Vin 25k
V
+
GND
5 6
GND V+
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NJM2578
s TYPICAL CHRACTERISTICS Supply Current vs. Supply Voltage
14 13 12 11 10 9 8 7 6 2 3 4
10 Isave[uA] 40
Supply Current at Power Save Mode vs. Supply Voltage
60
(No Signal)
(No Signal)
50
Icc[mA]
30
20
0
Maximum Output Voltage Swing vs. Supply Voltage (f=100kHz,THD=1%)
6.0 14.0
5 + V [V]
6
7
8
2
3
4
Voltage Gain vs. Supply Voltage (vin=100kHz,0.5Vpp sine-signal)
5 + V [V]
6
7
8
5.0
13.5
13.0 Vomv[Vp-p] 4.0 Gv[dB] 3.0 12.0 2.0 1.0 2 3 4 5 + V [V] 6 7 8 12.5
11.5
11.0 2 3 4 5 + V [V] 6 7 8
LPF Characteristic vs. Supply Voltage (vin=4.5MHz/100kHz,0.5Vpp)
0.5 2
LPF Characteristic vs. Supply Voltage (vin=8MHz/100kHz,0.5Vpp)
0 0.0 -2 [dB] Gfy8M[dB] 2 3 4 5 V [V]
+
Gfy
4.5M
-0.5
-4
-6 -1.0 -8
-1.5 6 7 8
-10 2 3 4 5 + V [V] 6 7 8
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NJM2578
s TYPICAL CHRACTERISTICS LPF Characteristic vs. Supply Voltage (vin=19MHz/100kHz,0.5Vpp) Differential Gain vs. Supply Voltage (vin=0.5Vpp,10Step signal)
-10 -15
5.0
4.0 -20 Gfy23.5M[dB] -25 -30 -35 1.0 -40 -45 2 3 4 5 + V [V] 6 7 8 0.0 2 3 4 5 + V [V] 6 7 8 3.0 DG[%] 2.0
5.0
Differential Phase vs. Supply Voltage (vin=0.5Vpp,10Step-signal)
S/N Ratio vs.Supply Voltage
100
(vin=0.5Vpp,RL=75ohm,100% White-video-sgnal,100kHz-6MHz)
4.0
90
80 3.0 SNv[dB] 2 3 4 5 + V [V] 6 7 8 DP[deg] 70
2.0
60 1.0
50
0.0
40 2 3 4 5 + V [V] 6 7 8
2 .Distortion vs. Supply Voltage
0
nd
SW Change Voltage vs.Supply Voltage
3.0
(vin=0.5Vpp,3.58MHz, Sine-Signal
RL=75ohm)
-20
2.5
2.0 -40 Hv[dB] Vth[V] 1.5
VthH
-60 1.0 -80
VthL
0.5
-100 2 3 4 5 + V [V] 6 7 8
0.0 2 3 4 5 V+[V] 6 7 8
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NJM2578
s TYPICAL CHRACTERISTICS Supply Current vs. Temperature + (V =3V No Signal)
14 13 12 11 10 9 8 7 6 -50 0 T[Co] 50 100 10 Isave[uA] Icc[mA] 40
Supply Current at Power Save Mode vs. Temperature
(V =3V No Signal)
60
+
50
30
20
0 -50 0 T[Co] 50 100
6.0
Maximum Output Voltage Swing vs. Temperature + (V =3V, f=100kHz THD=1%)
14.0
Voltage Gain vs. Temperature (vin=100kHz 0.5Vpp sine signal)
5.0
13.5
13.0 Vomv[Vp-p] 4.0 Gv[dB] 3.0 12.0 2.0 1.0 -50 0 T[C ]
o
12.5
11.5
11.0 50 100 -50 0 T[C ]
o
50
100
LPF Characteristics vs. Temperature + (V =3V, vin=4.5MHz/100kHz 0.5Vpp)
0.5 2
LPF Characteristics vs. Temperature + (V =3V, vin=8MHz/100kHz 0.5Vpp)
0 0.0 -2 Gfy4.5M[dB] Gfy8M[dB] -50 0 T[C ]
o
-0.5
-4
-6 -1.0 -8
-1.5 50 100
-10 -50 0 T[Co] 50 100
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NJM2578
s TYPICAL CHRACTERISTICS LPF Characteristics vs. Temperature + (V =3V, vin=19MHz/100kHz 0.5Vpp)
-10 -15 4.0 -20 Gfy 23.5M[dB] -25 -30 -35 1.0 -40 -45 -50 0 T[Co] 50 100 0.0 -50 0 T[C ]
o
Differential Gain vs. Temperature + (V =3V, vin=0.5Vpp 10Step-signal)
5.0
3.0 DG[%] 2.0
50
100
Differential Phase vs. Temperature + (V =3V, vin=0.5Vpp 10Step-signal)
5.0
S/N Ratio vs. Temperature
(V+=3V, RL=75ohm,vin=0.5Vpp White Video Signal 100kHz to 6MHz)
100
4.0
90
80 3.0 SNv[dB] -50 0 T[Co] 50 100 DP[deg] 70
2.0
60 1.0
50
0.0
40 -50 0 T[C ]
o
50
100
(V =3V, RL=75ohm, vin=0.5Vpp 3.58MHz sine-signal)
0
+
2
nd
Distortion vs. Temperature
3.0
SW Change Voltage vs. Temperature
-20
2.5
2.0 -40 Hv[dB] Vth[V] 1.5
VthH VthL
-60 1.0 -80
0.5
-100 -50 0 T[Co] 50 100
0.0 -50 0 T[Co] 50 100
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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.
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