MITSUMI
RGB Video Amplifier for Monitors MM1203
RGB Video Amplifier for Monitors
Monolithic IC MM1203
Outline
This IC is a wideband video amplifier system developed for high resolution RGB color monitors. In addition to
the three matched video amps, it has three gate control differential input black level comparators for
luminance adjustment, and three matched attenuator circuits for contrast adjustment. Each video amp has
maximum gain setting (AV=4~10) and a drive pin for trimming. The reference voltage supply for video input is
built in.
Features
1. Three built-in wideband video amps (70MHz @ -3dB)
2. Current consumption
65mA typ.
3. Matched (0.5dB) contrast adjustment attenuators built in
4. Built-in luminance adjustment comparators using external gate control
5. Gain of each video amp controlled independently
6. Built-in video input reference voltage
7. Low impedance output driver
Package
DIP-28B (MM1203ND)
Applications
1. Display monitors
Block Diagram
MITSUMI
RGB Video Amplifier for Monitors MM1203
Pin Description
Pin no.
Pin name
Function
Pin no.
Pin name
Function
1
V
CC
1
V
CC
1
15
B CLAMP (+)
B clamp input (+)
2
CONTRAST CAP
Contrast capacitor
16
B VIDEO OUT
B video output
3
CONTRAST CAP
Contrast capacitor
17
B CRAMP (-)
B clamp input (-)
4
R VIDEO IN
R video input
18
B DRIVE
B drive
5
R CLAMP CAP
R clamp capacitor
19
G CLAMP (+)
G clamp input (+)
6
G VIDEO IN
G video input
20
G VIDEO OUT
G video output
7
GND
GND
21
G CLMP (-)
G clamp input (-)
8
G CALMP CAP
G clamp capacitor
22
G DRIVE
G drive
9
B VIDEO IN
B video input
23
V
CC
2
V
CC
2
10
B CLAMP CAP
B clamp capacitor
24
R CLAMP (+)
R clamp input (+)
11
VREF
Video input reference voltage
25
R VIDEO OUT
R video output
12
CONTRAST
Contrast control
26
R CLAMP (-)
R clamp input (-)
13
V
CC
1
V
CC
1
27
R DRIVE
R drive
14
CLAMP
---------------------------------------------------------------------------------
GATE
------------------------------------------------------------------
Clamp gate
----------------------------------------------------------------------------------------------
input
28
V
CC
1
V
CC
1
Absolute Maximum Ratings
(Ta=25C)
Item
Symbol
Ratings
Units
Storage temperature
T
STG
-55~+150
C
Operating temperature
T
OPR
-0~+70
C
Power supply voltage
V
CC
13.5
V
Pin input voltage
V
IN
GND <
= V
IN
<
= V
CC
V
Video output current
I
O
28
mA
Allowable loss
P
d
2.5
W
Electrostatic breakdown
*
9
2
kV
Pin temperature
*
10
265
C
Recommended Operating Conditions
(Ta=C)
Item
Symbol
Conditions
Min. Typ. Max. Units
Operating power supply voltage
V
CC
10.8
12.0
13.2
V
MITSUMI
RGB Video Amplifier for Monitors MM1203
DC Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
1=V
CC
2=12V,
V12=6V, V14=0V, V15=2V, S1, 2, 3=OFF)
AC Electrical Characteristics
(Except where noted otherwise, Ta=25C, V
CC
1=V
CC
2=12V,
V12=12V, V14=0V, V15=4V, fin=10kHz, S1, 2, 3=ON)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
Consumption current
I
CC
1
only V
CC
1
65
85
mA
Video input reference voltage
V
REF
2.2
2.4
2.6
V
Video input bias current
I
B
5.0
20
A
Clamp gate input voltage L
V
CGL
0.8
1.2
V
Clamp gate input voltage H
V
CGH
1.6
2.0
V
Clamp gate input current L
I
CGL
V14=0V
-0.5
-0.5
A
Clamp gate input current H
I
CGH
V14=12V
0.005
1.0
A
Clamping capacitor charge current
I
CL+
V5, 8, 10=0V
500
850
A
Clamping capacitor discharge current
I
CL-
V5, 8, 10=5V
-500 -850
A
Video output voltage L
V
OL
V5, 8, 10=0V
0.9
1.25
V
Video output voltage H
V
OH
V5, 8, 10=5V
8.2
8.9
V
Video output offset difference 1
V
OF
1
V15=2V
*
2
0.5
50
mV
Video output offset difference 2
V
OF
2
V15=4V
*
2
0.5
50
mV
Item
Symbol
Measurement conditions Min. Typ. Max. Units
Video amp gain
A
V
V
IN
=560mV
P-P
4.5
6.0
V/V
Gain attenuation 1
A
V
1
V12=5V, V
IN
=560mV
P-P
-12.5
-10
-7.5
dB
Gain attenuation 2
A
V
2
V12=2V, V
IN
=560mV
P-P
-40
dB
Gain matching
A
VMAT
*
3
0.5
1.0
dB
Gain fluctuation matching 1
A
VM
1
V12=5V
*
3
*
4
0.1
0.5
dB
Gain fluctuation matching 2
A
VM
2
V12=V12
LOW
*
3
*
5
0.3
dB
Video amp distortion
THD
V12=3V, V
OUT
=1V
P-P
0.5
%
Video amp frequency bandwidth
f
BW
V
IN
=100mVrms
*
6
*
7
70
120
MHz
Output rise time
t
r
V
OUT
=4V
P-P
*
6
5
S
Output fall time
t
f
V
OUT
=4V
P-P
*
6
7
S
Crosstalk 1
V
SEP
1
f=10kHz, V
IN
=1V
P-P
*
8
-65
dB
Crosstalk 2
V
SEP
2
f=10kHz, V
IN
=1V
P-P
*
6
*
8
-46
dB
Notes:
*
1 V
CC
power supply pins 1, 13, 23 and 28 are connected to each other externally.
*
2 Measure offset voltage between any two amps.
*
3 Measure gain difference between any two amps. V
IN
=1V
P-P
*
4 Measure attenuation amount relative to Av max., and quantify the difference between any two amps.
*
5 The voltage at which V12 low is -40dB relative to AV max. for attenuation.
*
6 Mount on printed board with ground shield on both sides.
*
7 -3dB cutoff frequency from video amp gain.
*
8 Input a signal to any amp and terminate input for the remaining two amps (use resistor that corresponds
to signal source load), then measure output.
*
9 Human model. Discharge via 1.5k
from 100pF capacitor.
*
10 Solder for 10 seconds.
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