MITSUMI
RGB Video Amplifier for Monitors MM1375
RGB Video Amplifier for Monitors
Monolithic IC MM1375
Outline
This IC is a wideband RGB video amplifier with DC control, developed for use in monitors. It has a differential
input comparator for brightness adjustment, and three matched DC control attenuators for contrast
adjustment. All DC control input is high impedance, and the operating range is set for easy interface with
serial bus control systems, at 0~4V. Also, the building-in blanking circuit clamps video output to less than
0.2V during blanking, enabling blanking on the CRT cathode.
Features
1.
2.
3.
4.
5.
6.
7.
8.
Low power consumption
(V
CC
=8V, I
CC
=68mA)
Smaller capacity for clamping capacitor
(0.1µF)
High band video amp
100MHZ
@-3dB
Matched (±0.1dB) contrast adjustment attenuators built in
Built-in cutoff and brightness adjustment input comparators using external gate control
Built-in high input impedance DC contrast control, 0~4V
Output blanking function
Output can drive hybrid or discrete CRT driver directly
Package
SDIP-22A
Applications
1.
2.
3.
4.
High resolution RGB CRT monitors
AGC amps for video
Gain and DC offset control high bandwidth amps
Interface amps for LCD or CCD systems
MITSUMI
RGB Video Amplifier for Monitors MM1375
Block Diagram
MITSUMI
RGB Video Amplifier for Monitors MM1375
Pin Description
Pin no.
1
3
6
Pin name
R VIDEO IN
G VIDEO IN
B VIDEO IN
Internal equivalent circuit diagram
2
5
7
R CLAMP CAP
G CLAMP CAP
B CLAMP CAP
8
4, 18
9
22
15
12
V
CC
1
GND
CONTRAST
R DRIVE
G DRIVE
B DRIVE
10
11
BLANK GATE
CLAMP GATE
20
17
14
R VIDEO OUT
G VIDEO OUT
B VIDEO OUT
19
V
CC
2
21
16
13
R CUT-OFF ADJ
G CUT-OFF ADJ
B CUT-OFF ADJ
MITSUMI
RGB Video Amplifier for Monitors MM1375
Absolute Maximum Ratings
Item
Storage temperature
Operating temperature
Power supply voltage 1
Power supply voltage 2
Input voltage range
Video output current
Allowable loss
Electrostatic breakdown
Pin temperature
Note : Solder for 10S
(Ta=25°C)
Symbol
T
STG
T
OPR
V
CC
1
V
CC
2
V
IN
I
O
Pd
Ratings
-40~+125
-20~+80
10
15
GND < V
IN
< V
CC
1
=
=
28
1.6
2
265
Units
°C
°C
V
V
V
mA
W
kV
*
°C
Recommended Operating Conditions
Item
Operating power supply voltage 1
Operating power supply voltage 2
Symbol
V
CC
1
V
CC
2
(Ta=25°C)
Min. Typ. Max. Units
7.6
7.6
8.0
8.4
12.6
V
V
DC Electrical Characteristics
Item
Power supply current
Video amp input voltage
Video input resistance
Clamp gate input voltage L
Clamp gate input voltage H
Clamp gate input current L
Clamp gate input current H
Input charging current
Input discharge current
Clamp cap charge current
Clamp cap discharge current
Clamp cap bias discharge current
Blanking gate input voltage L
Blanking gate input voltage H
Blanking gate input current L
Blanking gate input current H
Video output voltage L
Video output voltage H
Black level output voltage
Black level output voltage
Output blanking voltage
Contrast control input current
Drive control input current
Cutoff control input current
(Except where noted otherwise, Ta=25°C, V
CC
1=8V, V
CC
2=8~12V,
V9=4V, V10=4V, V11=0V, V
C
-o=1.0V, V
DRV
=4V)
Symbol
I
CC
1
V
B
R
B
V
CGL
V
CGH
I
CGL
I
CGH
I
IN+
I
IN-
I
CL+
I
CL-
I
CLB
V
BGL
V
BGH
I
BGL
I
BGH
V
OL
V
OH
V
O
V
O
V
OBLK
I9
I
DBV
I
C-O
Measurement conditions
V
CC
1+V
CC
2
Min. Typ. Max. Units
68
80
mA
2.2
V
100
kΩ
0.8
1.2
V
1.6
2.0
V
-0.5 -5.0 µA
0.01 1.0
µA
0.75 1.0
mA
-0.75 -1.0
mA
0.75 1.0
mA
-0.75 -1.0
mA
50
nA
0.8
1.2
V
1.6
2.0
V
-1.0 -5.0 µA
0.01 1.0
µA
0.15 0.5
V
5.0
5.5
V
1.0
V
±100
mV
100 300 mV
190
µA
190
µA
-500
nA
V11=0V
V11=8V
V10=0V
V10=8V
V
C-O
=0V
V
C-O
=6V
V
C-O
=1V
V
C-O
=1V
V10=0V
V9=4V
V
DBV
=4V
V
C-O
=0~4V
MITSUMI
RGB Video Amplifier for Monitors MM1375
AC Electrical Characteristics
Item
Video amp gain
Gain attenuation 1
Gain attenuation 2
Drive control range
Gain matching
Gain change between amps
Video amp distortion
Video amp frequency bandwidth
Output rise time
Output fall time
Video amp isolation 1 (f
IN
=10kHz)
Video amp isolation 2 (f
IN
=10MHz)
Blanking output fall time
Blanking output fall time
Back-porch clamping pulse width
(Except where noted therwise, Ta=25°C, V
CC
1=8V, V
CC
2=8~12V)
Symbol
A
V
max.
A
V
1
A
V
2
A
VDRV
A
VMAT
A
VMAT
THD
f
BW
tr
tf
V
SEP
1
V
SEP
2
tr
tf
tpw
Measurement conditions
V
IN
=635mV
P-P
, V9=4V
V
DRV
=4V
V
IN
=635mV
P-P
, V9=2V
V
IN
=635mV
P-P
, V9=0.5V
V
DRV
=0~4V, V9=4V
V9=V
DRV
=4V
V9=4~2V
V
OUT
=1V
P-P
V
OUT
=4V
P-P
, V9=V
DRV
=4V
V
OUT
=4V
P-P
V
OUT
=4V
P-P
V9=4V
V9=4V
V
OUT
=1V
P-P
V
OUT
=1V
P-P
Min. Typ. Max. Units
5.4
14.6
7.0
16.9
-6
-38
6
0.3
0.1
1
100
3
4
-70
-50
7
7
200
V/V
dB
dB
dB
dB
dB
dB
%
MHz
nS
nS
dB
dB
nS
nS
nS
