MITSUMI
RGB Video Amplifier with OSD Input MM1381, 1382, 1383
RGB Video Amplifier with OSD Input
Monolithic IC MM1381, 1382, 1383
Outline
MM1381XD, MM1382XD and MM1383XD are wideband RGB video amplifiers with OSD input, developed for
use in monitors. The main differences between them are video amp bandwidth and output rise time, and
output fall time.
Model
Video amp band
Output rise time
Output fall time
MM1381
85MHz
3.5nS
4.5nS
MM1382
110MHz
3.0nS
4.0nS
MM1383
140MHz
2.3nS
3.3nS
MM1382XD is described here as the representative model.
MM1382 is a wideband video amp system with OSD input, developed for use in high resolution RGB
monitors. MM1382 has three matched video amps with a blanking function. All DC control input is high
impedance, and the operating range is set for easy interface with serial bus control systems, at 0~4V. The
OSD section has three TTL inputs and DC contrast control. OSD signals have TTL input interface, and these
signals are made internally so that OSD input low level and video black level are the same. OSD display color
balance follows video signal color balance control adjustment. In addition, MM1382 has a built-in spot-killer
circuit that protects the CRT when monitor power is turned off.
Features
1. Built-in wideband video amp
110MHz
@ -3dB (4V
P-P
output)
2. OSD input has TTL interface
bandwidth 50MHz
3. Output voltage less than 0.1V for blanking
4. High-speed switching between VIDEO/OSD
5. Each channel has an independent drive pin for color balance adjustment
6. Built-in high impedance DC contrast control, 0~4V (> 40dB range)
7. Built-in high impedance DC drive control, 0~4V (±3dB range)
8. Built-in high impedance DC OSD contrast control, 0~4V (> 40dB range)
9. 7V
P-P
output swing (band slightly attenuated)
10Output can drive hybrid or discrete CRT drivers directly
Package
DIP-28C (MM1381XD, MM1382XD, MM1383XD)
Applications
1.
2.
3.
4.
High resolution RGB CRT monitors with OSD function
AGC amps for video
Gain and DC offset control
LCD or CCD system interface amp
MITSUMI
RGB Video Amplifier with OSD Input MM1381, 1382, 1383
Block Diagram
MITSUMI
RGB Video Amplifier with OSD Input MM1381, 1382, 1383
Pin Description
Pin no.
1
2
3
Pin name
R OSD IN
G OSD IN
B OSD IN
Internal equivalent circuit diagram
Pin Description
These inputs accept standard TTL input. Each
color is either completely ON (logic high) or
completely OFF (logic low). Connect unused
pins to ground with a 47kΩ resistor.
4
VIDEO/OSD
SWITCH
This input accepts standard TTL input.
H : OSD, L : VIDEO
Connect OSD to ground with a 47kΩ resistor
when not in use.
5
8
11
R VIDEO IN
G VIDEO IN
B VIDEO IN
Video inputs.
These inputs must be AC coupled using a
capacitor of at least 1µF. The ideal capacitance
is 10 (F. DC playback is done with these
inputs. Also, serial resistor of approximately
33Ω must be used.
6
9
7
10
21
12
V
CC
1
GND
Power supply pin (except for output stage).
GND pins.
The GND pins are all connected internally, and
must be connected on the board as well.
V
REF
VIDEO CONTRAST
OSD CONTRAST
B DRIVE
G DRIVE
R DRIVE
Used for internal reference additional filter
capacitor. Voltage of this pin is 2.0V.
Contrast control pin :
4V no attenuation
0V attenuation over 60dB
Drive control pin :
4V no attenuation
0V 12dB attenuation
13
14
26
27
28
MITSUMI
RGB Video Amplifier with OSD Input MM1381, 1382, 1383
Pin no.
15
16
Pin name
CLAMP GATE
BLANK GATE
Internal equivalent circuit diagram
Pin Description
These two pins accept TTL input and are active
low. Clamp gate supplies video signal DC
playback. Blank gate makes video output less
than 200mV.
17
19
24
B CLAMP CAP
G CLAMP CAP
R CLAMP CAP
External clamp capacitors are charged, then
discharged to the correction voltage required
for DC playback. Recommended value is
0.1µF.
18
20
23
B VIDEO OUT
G VIDEO OUT
R VIDEO OUT
Video output.
Output must have 390Ω impedance to obtain
the correct black level.
22
V
CC
2
Output stage power supply pin.
Internal connection to V
CC
1 does not exist.
25
RGB CUT OFF
ADJUST
Sets video output black level for all three
channels.
Range : 0~4V
Minimum value for black level is limited to
approximately 300mV.
MITSUMI
RGB Video Amplifier with OSD Input MM1381, 1382, 1383
Absolute Maximum Ratings
*
1
Item
Storage temperature
Power supply voltage
Input voltage range
Video output current
Allowable loss
Electrostatic breakdown
Pin temperature
265
Symbol
T
STG
V
CC
max.
V
IN
max.
I
O
Pd
Ratings
-55~+150
15.0
GND < V
IN
< V
CC
=
=
28
2.5
2
Units
°C
V
V
mA
W
kV
°C
*
16
Recommended Operating Conditions
*
2
Item
Operating temperature
Operating voltage
Symbol
T
OPR
V
OPR
Ratings
-20~+70
11.4~12.6
Units
°C
V
DC Electrical Characteristics
Item
Consumption current 7
Video input resistance
Clamp gate input voltage L
Clamp gate input voltage H
Clamp gate input current L
Clamp gate input current H
Blanking gate input voltage L
Blanking gate input voltage H
Blanking gate input current L
Blanking gate input current H
Reference voltage
Input capacitor charging current
Input capacitor discharge current
Input capacitor bias discharge current
Clamp cap charging current
Clamp cap discharge current
Clamp cap bias discharge current
Output voltage L
Output voltage H
Black level output voltage
Black level output voltage
Output blanking voltage
(Except where noted otherwise, Ta=25°C, V
CC
1=V
CC
2=12V,
V13=4V, V14=4V, V
DRV
=4V, V
CG
= 0V, V
BG
=4V, V4=0V, V
C
-o=1V) 3
*
*
Contrast/drive input current
Cutoff input current
Spot killer voltage
Symbol
V
CC
R
IN
V
CGL
V
CGH
I
CGL
I
CGH
V
BGL
V
BGH
I
BGL
I
BGH
V
REF
I
ICL+
I
ICL-
I
ICLB
I
OCL+
I
OCL-
I
OCLB
V
OL
V
OH
V
O
V
O
V
OBLK
I13, 14
I26~28
I
C-O
V
SPOT
Measurement conditions
V
CC
1+V
CC
2, R
L
=∞
V
CG
=0V
V
CG
=12V
V
BG
=0V
V
BG
=12V
V
CG
=0V
V
CG
=0V
V
CG
=4V
V
CG
=0V
V
CG
=0V
V
CG
=4V
V
C
-
O
=0V
V
C
-
O
=10V
V
C
-
O
=1V
7
V
C
-
O
=1V
V
BG
=0V
*
Min. Typ. Max. Units
95
120 mA
100
Ω
0.8
1.2
V
1.6
2.0
V
-1.5 -5.0 uA
0.01 1.0
uA
0.8
1.2
V
1.6
2.0
V
-8
-11
uA
0.01 1.0
uA
2.0
V
450 750
uA
-450 750
uA
±750
nA
450 750
uA
-450 -750
uA
750
nA
50
100 mV
7.0
7.5
V
1.2
V
±20 ±250 mV
100 500 mV
-125 -500
-1.0
10.6
-1.5
11.2
nA
uA
V
V13=V14=V
DRV
=0V~4V
V
-O
=0V~4V
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
