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KA2139 VIDEO AMPLIFIER FOR MONITOR
3 CHANNEL R.G.B VIDEO AMPLIFIER
The KA2l39 is a monolithic integrated circuit for processing
the R,G,B video in high resolution CRT display.
It contains 3 channel video amplifier, black level clamp
comparator for brightness control and DC control attenuator
for contrast control, this device is suitable for monitor.
28-DIP-600A
FUNCTIONS
• R. G. B amplifier
• Contrast control
• Clamp & brIghtness circuit
• Vref. circuit
FEATURES
• 3 Channel R.G.B video amplifier (f. -3DB =7OMHz:Typ)
• Superior linearity contrast control
• Black level clamp comparator for
brightness control
• Built-in clamp gate circuit to operate the
clamp comparator at black level
• Vref 2.4V bandgap circuit
ORDERING INFORMATION
Device Package Operating Temperature
KA2139 28 DIP
-20 C ~ +70 C
BLOCK DIAGRAM
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A2
A2
A2
A1
+ -
gm
A1
gm
A1
gm
+ -
+ -
CONTRAST
CONTROL
RED
GREEN
BLUE
Vref
2.4V
1.4
V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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KA2139 VIDEO AMPLIFIER FOR MONITOR
PIN DESCRIPTION
No
Symbol
Description
No
Symbol
Description
1 V CC1
Power supply 1
15 BCLAMP(+) B brightness control
2 CONCAP1 Contrast capacitor 1
16 BOUT
B channel output
3 CONCAP2 Contrast capacitor 2
17 BCLAMP(-) B-CH clamp feedback
4 RIN
R channel input
18 BDREVE
B-CH drive output
5 RCAP
R-CH comparator cap.
19 GCLAMP(+) G brightness control
6 GIN
G channel input
20 GOUT
G channel output
7 GND
Ground
21 GCLAMP(-) G-CH clamp feedback
8 GCAP
G-CH comparator cap.
22 GDRIVE
G-CH drive output
9 BIN
B channel input
23 V CC2
Power supply 2
10 BCAP
B-CH comparator cap.
24 RCLAMP(+) R brightness control
11 V REF
R,G,B amp. offset voltage
25 ROUT
R channel output
12 CON
Contrast control
26 RCLAMP(-) R-CH clamp feedback
13 V CC1
Power supply 1
27 RDRIVE
R-CH drive output
14 GATEIN
Clamp gate input
28 V CC1
Power supply 1
ABSOLUTE MAXIMUM RATINGS (T A = 25 C)
Characteristics
Symbol
Value
Unit
Maximum Supply Voltage
Maximum Supply Current
Operating Voltage
Maximum Power Dissipation
Storage Temperature
Operating Temperature
V CC max
l CC max
V CC opr
P D max
T STG
T OPR
13.5
105.0
10.8~13.2
2.5
- 55~+150
- 20~ + 70
V
mA
V
w
C
C
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KA2139 VIDEO AMPLIFIER FOR MONITOR
ELECTRICAL CHARACTERISTICS
(V CC = 12V, T A = 25 C, unless otherwise specified)
Characteristics
Symbol
Test Condition Min
Typ Max Unit
Supply Current
I CC
75
90.0
105
mA
R,G,B CH Output Voltage 1
VH 16,20,25
V CC = 12V
1.9
2.0
2.1
V
R,G,B CH Output Voltage 2
VH 16,20,25
V24 = 2V
3.9
4.0
4.1
V
Input Reference Voltage
V REF
V12 = 6V
2.0
2.4
2.8
V
R,G,B Input Bias Current
Iin
V14 = 0V
-
5.0
20.0
m A
Clamp Gate Low Input Voltage
V14L
V14 Variable
0.8
1.2
-
V
Clamp Gate High Input Voltage
V14H
V14 Variable
-
1.6
2.0
V
Clamp Gate Low Input Current
IgateL
V14 = 0V
-5.0
-5.0
-
m A
Clamp Gate High Input Current
IgateH
V14 = 12V
-
0.05
1.0
m A
R,G,B Clamp CAP.
Charge Current
Iclamp(+)
Vclamp cap. = 0V 0.5
0.85
1.2
mA
R,G,B Clamp CAP.
Discharge Current
Iclamp(-)
Vclamp cap. = 5V -0.5 -0.85 -1.2
mA
R,G,B Output Low Voltage
VOL 16,20,25
Vclamp = 0V
-
1.0
1.4
V
R,G,B Output High Voltage
VOH 16,20,25
Vclamp = 5V
8.0
8.5
-
V
Contrast Capacitor Voltage 1
Vcon1
Measure the
contrast
4.8
5.2
5.6
V
Contrast Capacitor Voltage 2
Vcon2
capacitor voltage 4.8
5.2
5.6
V
R,G,B Output DC Offset
Low Voltage
D VR-GL
V24 = 2V
-50
0
50
mV
R,G,B Output DC Offset
High Voltage
D VR-GH
V24 = 4V
-50
0
50
mV
R,G,B Video Amp. Gain 1
AVmax
V12 = 12V, Vin
= 0.56
V P.P
13.1 15.6 18.1
dB
R,G,B Video Amp. Gain 2
D AV5
V12 = 5V
-5
-10.0 -1.5
dB
R,G,B Video Amp. Gain 3
D AV2
V12 = 2V
-30
-40.0
-50
dB
R,G,B Output Gain Difference 1
D AVR-G
V12 = 12V
VIN = 1.0V P.P
-1.0
0
1.0
dB
R,G,B Output Gain VAR. 1
D AVR-G1
V12 = 5V
-1.0
0
1.0
dB
R,G,B Output Gain VAR. 2
D AVR-G2
V12 = 2V
-3.0
0
3.0
dB
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KA2139 VIDEO AMPLIFIER FOR MONITOR
ELECTRICAL CHARACTERISTICS
(V CC = 12V, T A = 25 C, unless otherwise specified)
Characteristics
Symbol
Test Condition
Min
Typ Max Unit
R,G,B Amp. Distortion
THD
V12= 4V
-
0.5
5.0
%
R,G,B Amp. Banwidth
f-3dB
V12= 12V
50
70
-
MHz
R,G,B Amp. rising time
Rtr, Gtr, Btr V12= 12V
-
5.0
7.2
ns
R Amp. Isolation1-100K
AR1iso100K Measure the G output
level
-40
-60
-
dB
R Amp. Isolation2-100K
AR2iso100K Measure the B output level
-40
-60
-
dB
G Amp. Isolation1-100K
AG1iso100K Measure the R output level
-40
-60
-
dB
G Amp. Isolation2-100K
AG2iso100K Measure the B output level
-40
-60
-
dB
B Amp. Isolation1-100K
AB1iso100K Measure the R output level
-40
-60
-
dB
B Amp. Isolation2-100K
AB2iso100K Measure the G output level
-40
-60
-
dB
R Amp. Isolation1-100K
AR1iso100K Measure the G output level
-25
-40
-
dB
R Amp. Isolation2-100K
AR2iso100K Measure the B output level
-25
-40
-
dB
G Amp. Isolation1-100K
AG1iso100K Measure the R output level
-25
-40
-
dB
G Amp. Isolation2-100K
AG2iso100K Measure the B output level
-25
-40
-
dB
B Amp. Isolation1-100K
AB1iso100K Measure the R output level
-25
-40
-
dB
B Amp. Isolation2-100K
AB2iso100K Measure the G output
-25
-40
-
dB
level
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KA2139 VIDEO AMPLIFIER FOR MONITOR
TEST CIRCUIT
R
OUT
G
OUT
B
OUT
10K W
0.1 m F
100 W
0.1 m F
330 W
100 W 0.1 m F
330 W
100 W
A
0.1 m F
10K W
10K W
10K W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
KA2139
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0.1 m F
A
0.1 m F
0.1 m F
0 .1 m F 0 .1 m F
A
0.1 m F
A
A
0 .1 m F
V CC
12V
A
0.1 m F
0.1 m F
0.1 m F
5 m F
+
5 m F
+
5 m F
+
10K W
RIN
50 W
10K W
10K W
50 W
BIN
+
100 W
100 W
10K W
+
5 m F
47 m F
0.1 m F
50 W
10K W
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