KA2500.pdf

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KA2500.PDF
APRIL. 1998
DATA SHEET
KA2500
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I 2 C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS KA2500
I 2 C BUS CONTROLLED R/G/B VIDEO AMPLIFIER
28-DIP-600A
The KA2500 is a very high frequency video amplifier
system with I 2 C Bus control used in Monitors with high
resolution up to1280 · 1024.
It contains 3 matched R/G/B video Amplifiers with OSD
interface and provides flexible interfacing to I 2 C Bus
controlled adjustment systems.
FUNCTIONS
• R/G/B Video Amplifier
• OSD Interface
• I 2 C BUS Control
• Contrast/OSD Contrast
• Brightness Control
• Cut-Off Brightness Control
• R/G/B SUB Contrast/Cut-Off Control
• Blank/Clamp Gate
• Half tone
• Brightness Uniformity
ORDERING INFORMATION
Device
Package
Operating Temperature
KA2500
28-DIP-600A
-20 C ~ +75 C
FEATURES
• 3 - Channel R/G/B Video Amplifier, 150MHz @f-3dB
• I 2 C Bus Control Items
- Contrast Control
- SUB Contrast Control For Each Channel
- Brightness Control
- OSD Contrast Control
- Cut-off Brightness Control
- Cut-off Control For Each Channel
- Switch Registers for SBLK and Video Half Tone and
Cut-Off INT/EXT
• SUB Contrast Control Range: -11dB
• Capable of 7.0Vpp Output Swing Range
• Video/OSD High Speed Switch
• Clamp Gate With Anti OSD Sagging
• B/U (Brightness Uniformity) Interface
• Video Input Clamp, BRT Clamp
• Video & OSD Half Tone Function on OSD
Picture
(OSD Raster Selection by HS1, 2: 4 colors)
• OSD Interface, OSD BLK
• ABL
• TTL R/G/B OSD Inputs, 80MHz bandwidth
• Contrast Control Range: -38dB
• OSD Contrast Control Range: -38dB
1
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KA2500 I 2 C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
BLOCK DIAGRAM
ONE (RED)
OF THREE CHANNELS
BLK
ROSD
1
OSD
INTERFACE
VIDEO
OSD
SWITCH
OSD
RASTER
OSD
CONTRAST
A2
26
ROUT
+
SUB
CONTRAST
VIDEO
HALF-TONE
CLP
VIDEO
CONTRAST
GOSD
2
A1
27
RCLP
A3
gm2
BOSD
3
HALF-TONE
17
RCT
VCC2
9
+
23
VCC3
Cut Off
+
+
gm1
RIN
5
22
GND3
VCC1
6
CLP BLK
21
BOUT
CLP
GND1
7
20
BCLP
GIN
8
15
BCT
B/U
28
B/U
INTERFACE
VIDEO
HALF-TONE
VIDEO-HALF TONE SWITCH
D1(0AH)
24
GOUT
VI/OSD_SW
4
VIDEO/OSD
SWITCH
OSD RASTER
SELECT
OSD RASTER COLOR
D6:7(0AH)
25
GCLP
SOFT BLANK
D0(0AH)
CLP
18
CLAMP
GATE
BLANK
GATE
16
GCT
BIN
10
12
ABL
BLK
19
I 2 C BUS CONTROL
14
SDA
INTERFACE & CONTROL
GND(L)
11
13
SCL
2
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I 2 C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS KA2500
PIN CONFIGURATION
1
ROSD
B/U
28
2
GOSD
RCLP
27
3
BOSD
ROUT
26
4
VI/OSD_SW
GCLP
25
5
RIN
GOUT
24
6
VCC1
VCC3
23
7
GND1
GND3
22
8
GIN
BOUT
21
9
VCC2
BCLP
20
10
BIN
BLK
19
11 GND(L)
CLP
18
12
ABL
RCT
17
13
SCL
GCT
16
14
SDA
BCT
15
Table 1. Pin Configuration
Pin No
Symbol
I/O
Configuration
1
ROSD
I
Red OSD Input
2
GOSD
I
Green OSD Input
3
BOSD
I
Blue OSD Input
4
VI/OSD_SW
I
Video or OSD Switch
5
RIN
I
Red Video Input
6
V CC1
-
V CC (normal)
7
GND1
-
Ground1 (normal)
8
GIN
I
Green Video Input
9
V CC2
-
V CC (normal)
3
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KA2500 I 2 C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 1. Pin Configuration
Pin No
Symbol
I/O
Configuration
10
BIN
I
Blue Video Input
11
GND (L)
-
Ground2 (logic)
12
ABL
-
Automatic Beam Limit
13
SCL
I/O
Serial Clock
14
SDA
I/O
Serial Data
15
BCT
I
Blue Cut Off Control
16
GCT
I
Green Cut Off Control
17
RCT
I
Red Cut Off Control
18
CLP
I
Clamp Gate Signal Input
19
BLK
I
Blank Gate Signal Input
20
BCLP
-
Blue Clamp Cap
21
BOUT
O
Blue Video Output
22
GND3
-
Ground3 (drive part)
23
V CC3
-
V CC (drive part)
24
GOUT
O
Green Video Output
25
GCLP
-
Green Clamp Cap
26
ROUT
O
Red Video Output
27
RCLP
-
Red Clamp Cap
28
B/U
I
Brightness Uniformity
4
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