Samsung KA2141 Datasheet

APRIL. 1998
DATA SHEET
KA2141
R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141
R/G/B VIDEO AMPLIFIER
The KA2141 is a very high frequency Video amplifier system to be used in Monitor. It contains 3 matched R/G/B video amplifiers with blank signal and clamp gate pulse and provides a flexible interfacing to DC controlled adjustment system
FUNCTIONS
• R/G/B Video Amplifier
• Contrast/SUB contrast control
• Brightness control
• Blank gate/Clamp gate
• Video clamp
FEATURES
20-DIP-300A
ORDERING INFORMATION
Device Package Operating Temperature
KA2141 20-DIP-300 -25 °C ~ +70 °C
• 3 - channel R/G/B Video Amplifier: 85MHz bandwidth.
• DC contrast control range: -38dB (0V ~ 4V)
• DC sub contrast control range: -11dB (0V ~ 4V)
• Maximum Video output level: 7Vpp
• DC Brightness control range: 0V ~ 4V
• Include blank gate and clamp gate signal processing block
1
KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS
BLOCK DIAGRAM
ONE (RED) OF THREE CHANNELS
BDRIVE
GDRIVE
RDRIVE
RIN
VCC1
GIN
GND1
BIN
CONST
1
2
3
2.4V _
A1
+
4
5
6
VIDEO
CONTRAST
VIDEO
CONTRAST
CONTROL
VIDEO
SUB_CONTRAST
VIDEO
SUB_CONTRAST
CONTROL
+
A2
_
_
gm
+
-A3
-A4
7
8
CONTRAST
CONTROL
CLAMP
GATE
BLANK
GATE
9
20
19
18
17
16
15
14
13
12
BRIGHT
ROUT
RCLP
GOUT
VCC2
GCLP
GND2
BOUT
BCLP
CLP
10
2
11
BLK
R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141
PIN CONFIGURATIONS
Table 1. Pin Configurations
Pin No Symbol I/O Configurations
1 BDRIVE I Blue Gain Control 2 GDRIVE I Green Gain Control 3 RDRIVE I Red Gain Control 4 RIN I Red Video Input 5 V
CC1
- V
CC1
= 12V
6 GIN I Green Video Input 7 GND1 - Ground1 8 BIN I Blue Video Input
9 CONST I Contrast Control Input 10 CLP I Clamp Gate Pulse Input 11 BLK I Blank Gate Pulse Input 12 BCLP - Blue Clamp Capacitor 13 BOUT O Blue Video Output 14 GND2 - Ground2 15 GCLP - Green Clamp Capacitor 16 V
CC2
- V
CC2
= 12V
17 GOUT O Green Video Output 18 RCLP - Red Clamp Capacitor 19 ROUT O Red Video Output 20 BRIGHT I Brightness Control Input
3
KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS
PIN DESCRITION
Table 2. Pin Description
Pin No Pin Name Schematic Description
4 6 8
9 1 2 3
5
17
Red Video Input
(RIN)
Green Video input
(GIN)
Blue Video Input
(BIN)
Video Contrast
(CONST)
Blue Drive
(BDRIVE)
Green Drive
(GDRIVE)
Red Drive (RDRIVE)
V
CC1
V
CC2
VCC
Max input video signal is 0.7Vpp
2.4V Bias
Video maximum contrast control range (0V ~ 4V) is -38dB Sub contrast control range (0V ~ 4V) is -11dB
PIN 9
- Supply voltage
7
14
GND1 GND2
10 Clamp Gate Input
(CLP)
PIN 10
4
- Ground
Video amp actives when clamp gate signal is in low TTL level
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