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PDF NJU71041 Data sheet ( Hoja de datos )
| Número de pieza | NJU71041 | |
| Descripción | OUTPUT COUPLING CAPACITOR-LESS VIDEO AMPLIFIER | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NJU71041 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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NJU71041
OUTPUT COUPLING CAPACITOR-LESS
VIDEO AMPLIFIER WITH COAXIAL COMMUNICATION RECEIVER
GENERAL DESCRIPTION
The NJU71041 is a Low Voltage Video Amplifier with Coaxial
Communication Receiver. By the internal charge pump circuit, output
capacitor is unnecessary.
The NJU71041 features low power and small package, and is
suitable for low power design on downsizing of portable video
system and system with video output.
PACKAGE OUTLINE
NJU71041RB2
MSOP10(TVSP10)
FEATURES
Operating Voltage
2.5 to 3.45V
Output coupling capacitor-less
Coaxial Communication Receiver
6dB amplifier
Internal 75 Driver Circuit (2-system drive)
Internal LPF
-1dB at 10MHz typ
CMOS Technology
Package Outline
-40dB at 54MHz typ
MSOP10(TVSP10)*
*MEET JEDEC MO-187-DA / THIN TYPE
PIN CONFIGURATION
1 10
56
NJU71041RB2
BLOCK DIAGRAM
1: CP1
2: V+
3: VIN
4: UTCREF
5: UTCOUT
6: UTCIN
7: VOUT
8: GND
9: V-
10: CP2
6dB 75ΩDriver
VIN LPF
VOUT
UTCOUT
UTCREF
V-
V+
VREF
Charge
Pump
CLAMP
UTCIN
CP1
CP2
GND
Ver.8
-1-
1 page  
NJU71041
Application Note
The UTC receiver block (UTCIN (pin6), UTCOUT (pin5), UTCREF (pin4))
The NJU71041 can transmit that video signal and camera control signal at one coaxial cable.
The output video signal from the NJU71041 superimposes on a camera control signal (a coaxial data from an
output unit).
The output unit examples are DVR, camera-controller, and so on.
The superimposed signal is inputted to the NJU71041 UTCIN (pin 6). Refer to fig1.
The signal inputted to UTCIN (pin6) is compared to the reference voltage generated by the NJU71041.
After that, it is amplified and outputted the high (V+)/low (0V) signal from UTCOUT (pin5).
(The UTCREF (pin4) can set the threshold voltage of the comparator by the pull-down or the pull up resistor.
Refer to fig3.)
The signal outputted from UTCOUT (pin5) is inputted to a camera control block of CCTV.
As above mentioned, the video signal and the camera control signal can transmit at one coaxial cable.
Therefore, The NJU71041 contributes to the space - saving.
A case of multiple coaxial transmission: UTC(Up The Coaxial)
This is one of a case at the multiplex coaxial transmission used in CCTV.
It is a system that control signals of camera multiplexing to the coaxial cable.
This system is superimposed on the control signal pulse in the vertical blanking period as shown in Figure.
This is because do not affect the video signal.
Case of Coaxitron
18 19
22
1 2 3 4 5 6 7 8 9 10 17 20 21
Horizontal
s ync hroni zati on
peri od
1H
1H
Equalizing pulse period
1H
Vertical synchronization
pulse period
Equalizing pulse period
Figure: A case of UTC
-5-
5 Page 
TYPICAL CHARACTERISTICS
Differential Gain vs. Supply Voltage
1.0Vpp, 10step video signal input
1.0
NJU71041
Differential Phase vs. Supply Voltage
1.0Vpp, 10step video signal input
1.0
0.5 0.5
0.0
2.5
100
2.7 2.9 3.1 3.3
Supply Voltage [V]
Signal to Noise Ratio vs. Supply Voltage
1.0Vpp, 100% white video signal input
3.5
90
80
70
60
2.5
2.7 2.9 3.1 3.3
Supply Voltage [V]
3.5
Total Harmonic Distotion vs. Supply Voltage
VOUT=4Vpp 100kHz Sinw ave
1.0
0.8
0.6
0.4
0.2
0.0
2.5
2.7 2.9 3.1 3.3
Supply Voltage [V]
3.5
0.0
2.5
2.7 2.9 3.1 3.3
Supply Voltage [V]
Switching Noise Level vs. Supply Voltage
10
8
6
4
2
0
2.5 2.7 2.9 3.1 3.3
Supply Voltage [V]
3.5
3.5
- 11 -
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NJU71041.PDF ] | |
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