KA2139 VIDEO AMPLIFIER FOR MONITOR
28-DIP-600A
ORDERING INFORMATION
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.
FUNCTIONS
• R. G. B amplifier
• Contrast control
• Clamp & brIghtness circuit
• Vref. circuit
FEATURES
• 3 Channel R.G.B video amplifier (f.
• 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
=7OMHz:Typ)
-3DB
Device Package Operating Temperature
KA2139 28 DIP
-20°C ~ +70°C
BLOCK DIAGRAM
28 27 26
2
1
24 23 22 21 20 19 18 17 16 15
25
A2 A2
gm
A1
+ -
RED
3 4 5 6 7 8 9 10 11 12 13 14
GREEN
gm
A1
+ - + -
BLUE
A1
A2
gm
CONTRAST
CONTROL
Vref
2.4V
1.4
V
KA2139 VIDEO AMPLIFIER FOR MONITOR
PIN DESCRIPTION
No Symbol Description No Symbol Description
1 V
CC1
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
10 BCAP B-CH comparator cap. 24 RCLAMP(+) R brightness control
11 V
REF
12 CON Contrast control 26 RCLAMP(-) R-CH clamp feedback
13 V
CC1
14 GATEIN Clamp gate input 28 V
Power supply 1 15 BCLAMP(+) B brightness control
CC2
Power supply 2
R,G,B amp. offset voltage 25 ROUT R channel output
Power supply 1 27 RDRIVE R-CH drive output
CC1
Power supply 1
ABSOLUTE MAXIMUM RATINGS (TA = 25°C)
Characteristics Symbol Value Unit
Maximum Supply Voltage
Maximum Supply Current
Operating Voltage
Maximum Power Dissipation
Storage Temperature
Operating Temperature
VCCmax
lCCmax
VCCopr
PDmax
T
STG
T
OPR
13.5
105.0
10.8~13.2
2.5
- 55~+150
- 20~ + 70
V
mA
V
w
°C
°C
KA2139 VIDEO AMPLIFIER FOR MONITOR
ELECTRICAL CHARACTERISTICS
(V
= 12V, TA = 25°C, unless otherwise specified)
CC
Characteristics Symbol Test Condition Min Typ Max Unit
Supply Current I
CC
R,G,B CH Output Voltage 1 VH 16,20,25 VCC = 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
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 Clamp Gate High Input Current IgateH V14 = 12V - 0.05 1.0
R,G,B Clamp CAP.
Iclamp(+) Vclamp cap. = 0V 0.5 0.85 1.2 mA
Charge Current
R,G,B Clamp CAP.
Iclamp(-) Vclamp cap. = 5V -0.5 -0.85 -1.2 mA
Discharge Current
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
Contrast Capacitor Voltage 2 Vcon2 capacitor voltage 4.8 5.2 5.6 V
R,G,B Output DC Offset
∆VR-GL
V24 = 2V -50 0 50 mV
Low Voltage
R,G,B Output DC Offset
∆VR-GH
V24 = 4V -50 0 50 mV
High Voltage
R,G,B Video Amp. Gain 1 AVmax V12 = 12V, Vin
= 0.56
V
P.P
R,G,B Video Amp. Gain 2
R,G,B Video Amp. Gain 3
R,G,B Output Gain Difference 1
R,G,B Output Gain VAR. 1
R,G,B Output Gain VAR. 2
∆AV5
∆AV2
∆AVR-G
∆AVR-G1
∆AVR-G2
V12 = 5V -5 -10.0 -1.5 dB
V12 = 2V -30 -40.0 -50 dB
V12 = 12V
VIN = 1.0V
P.P
V12 = 5V -1.0 0 1.0 dB
V12 = 2V -3.0 0 3.0 dB
75 90.0 105 mA
µA
µA
µA
4.8 5.2 5.6 V
13.1 15.6 18.1 dB
-1.0 0 1.0 dB
KA2139 VIDEO AMPLIFIER FOR MONITOR
ELECTRICAL CHARACTERISTICS
(VCC = 12V, TA = 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
R Amp. Isolation2-100K
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
AR2iso100K Measure the B output level -40 -60 - dB
-40 -60 - 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
KA2139 VIDEO AMPLIFIER FOR MONITOR
TEST CIRCUIT
VCC
12V
100Ω
0.1µF
10K
Ω
OUT
330Ω
R
10KΩ
100Ω
100Ω
A
0.1µF
10KΩ
OUT
G
330
Ω
28 27 26 25 24 23 22 21 20 19 18 17 16 15
KA2139
2 3
1
A
0.1µF 0.1µF0.1µF
+
0.1µF47µF
4
A
0.1µF
5µF
+
RIN
50Ω
5
0.1µF
5µF
10KΩ
6 7
A
0.1µF
+
50Ω
0.1µF
10KΩ
8 9
5µF
BIN
+
A
0.1µF
10 11
0.1µF
10KΩ
50Ω
5µF
100Ω
+
B
OUT
0.1µF
330Ω
10KΩ
12 13
0.1µF
10KΩ 10KΩ
100
Ω
0.1µF
14
A
100Ω
KA2139 VIDEO AMPLIFIER FOR MONITOR
APPLICATION CIRCUIT
G
OUT
330
R
OUT
+
0.01µF
100
200
100
28 27 26 25 24 23 22 21 20 19 18 17 16 15
00 200100
2
B
OUT
330330
10K
1K
0.1µF
KA2139
1
0.1µF
2
0.1µF
3 4
5 6
+
0.47µF
10K
10µF
7
470K
10K 10K
10µF
8
+
0.47µF
470K
9 10
0.47µF
+++
10µF
11
470K
13 14
12
0.1µF
+
10K
4.7K
0.1µF
+
10µF
10K
1K
R
INPUT
G
INPUT
B
INPUT
CLAMP
GATE
INPUT
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