Samsung KA2504 Datasheet

MARCH. 1998

DATA SHEET

KA2504

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER KA2504

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER

24-DIP-300

The KA2504 is very high frequency video amplifier system
with I2C BUS control used in Monitors.

It contains 3 matched R/G/B video Amplifiers and provides
flexible interfacing to the I2C BUS controlled adjustment sys-

tems.

FUNCTIONS

• R/G/B Video Amplifier

• I2C BUS Control

• Contrast Control

• Brightness Control

• Cut-Off Brightness Control

• R/G/B SUB Contrast/Cut Off Control

• Blank/Clamp Gate

• Auto beam current limitation (ABL) is possible
with external pin.

• The KA2504 includes white balance adjustment
that is effective on brightness (by Cut-Off control
for each channel).

ORDERING INFORMATION

Device Package Operating Temperature

KA2504 24-DIP-300 -20 °C ~ 75 °

FEATURES

• 3-Channel matched R/G/B Video Amplifiers

• I2C BUS control items

- Contrast control for the 3 channels

- Brightness control for the 3 channels

- SUB Contrast control for each channel

- Cut-Off control for each channel

- Cut-Off Brightness control for the 3 channels

- Switch Registers for SBLK and Cut-Off Offset Current

• Built-in ABL (Automatic Beam Limitation)

• Built-in Video output Brightness clamp

• 3-Channel R/G/B Video Amplifier 85 MHz @f-3 dB

• Contrast Control Range: -38 dB

• SUB Contrast Control Range: -11 dB

• Capable of 7 Vpp Output Swing

1

KA2504 I2C BUS COTROLLED R/G/B VIDEO AMPLIFIER

BLOCK DIAGRAM

ONE (RED)

VCC1

RIN

GND1

OF THREE CHANNELS

1

2

VIDEO

CONTRAST

SUB

CONTRAST

A1

3

BLK

A2

A3

CLP

gm2

ROUT

23

RCLP

24

_
+

16

RCT

GIN

GND2

BIN

VCC2

GND(L)

ABL

SCL

SDA

10

11

4

2.4V

5

BLK

CLP

CT

OFFSET

+ +

CUT OFF

CT BRT

6

7

CUT OFF OFFSET D6:5 (01H)

9

CONTRAST (00H)

G DRIVE (03H)

R DRIVE (02H)

BRIGHTNESS (01H)

B DRIVE (04H)

G CUT OFF (07H)

R CUT OFF (06H)

8

CUT OFF BRIGHT (05H)

B CUT OFF (08H)

CLAMP

GATE

21

22

15

18

17

14

20

19

12

GOUT

GCLP

GCT

BOUT

BCLP

BCT

VCC3

GND3

CLP

I2C BUS CONTROL

SOFT BLANK

D7 (01H)

BLANK

GATE

CONTROL

13

BLK

2

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER KA2504

PIN CONFIGURATION

10

11

12

1

2

3

4

5

6

7

8

9

VCC1

RIN

GND1

GIN

GND2

BIN

VCC2

ABL

GND(L)

SCL

SDA

CLP

24

RCLP

23

ROUT

22

GCLP

21

GOUT

20

VCC3

19

GND3

18

BOUT

KA2504

BCLP

RCT

GCT

BCT

BLK

17

16

15

14

13

Table 1. Pin Configuration

NO Symbol I/O Configuration NO Symbol I/O Configuration

1 VCC1 - Normal Power Supply 13 BLK I Blank Gate Input
2 RIN I Red Video Input 14 BCT I Blue Cut off ctrl

3 GND1 - Normal Ground 15 GCT I Green Cut off ctrl
4 GIN I Green Video Input 16 RCT I Red Cut off ctrl
5 GND2 - Normal Ground 17 BCLP - Blue Clamp Cap
6 BIN I Blue Video Input 18 BOUT O Blue Video Output
7 VCC2 - Normal Power Supply 19 GND3 - Drive Power Ground

8 ABL I Automatic Beam Limit 20 VCC3 - Drive Power Supply

9 GND (L) - Logic Ground 21 GOUT O Green Video Output
10 SCL I/O Serial Clock 22 GCLP - Green Clamp Cap
11 SDA I/O Serial Data 23 ROUT O Red Video Output
12 CLP I Clamp Gate Input 24 RCLP - Red Clamp Cap

3

KA2504 I2C BUS COTROLLED R/G/B VIDEO AMPLIFIER

PIN DESCRIPTION

Table 2. Pin Description

Pin No Pin Name Schematic Description

1 VCC1 - Normal V
2

4

Red Video Input

(RIN)

Green Video Input

(GIN)

PIN 2

2.4V

VCC

Video Input (Maximum 0.7
Vpp)

CC

Blue Video Input

8

(BIN)

3 GND1 - Normal Ground
5 GND2 - Normal Ground
7 VCC2 - Logic V

8

VCC

CC

ABL

PIN 8

Auto Beam Limitation
(Control Range: 0.5 ~ 4.5 V )

9 GND (L) - Logic Ground

4

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER KA2504

PIN 10

Table 2. Pin Description (Continued)

Pin No Pin Name Schematic Description

10

11

12

Serial Clock Input

(SCL)

Serial Data Input

(SDA)

Clamp Gate Input

(CLP)

PIN12

3.2V

SCL, SDA for I2C Bus Control

VCC

5.1V

Clamp Gate Input: TTL Level
Active Low
Clamp Gate Min. Duty

f: 34 kHz
duty: 0.3 µS

13 Blank Gate Input

(BLK)

14

Blue Cut-Off

(BCT)

15

Green Cut-Off

(GCT)

16

Red Cut-Off

(RCT)

lctbrt lct

PIN13

7V VCC

CS2 CS1

Blank Gate Input: TTL Level
Active Low

vccvcc

Cut-Off Control Output
Icut-off = Ict+Ictbrt+Ics 1+Ics 2
Ict : 0 ~ 540µA

pin 14

Ictbrt: 0 ~ 160µA
Ics 1 : 80µA
Ics 2 : 160µA

5

KA2504 I2C BUS COTROLLED R/G/B VIDEO AMPLIFIER

Table 2. Pin Description (Continued)

Pin No Pin Name Schematic Description

17

22

24

18

21

23

Blue Clamp Cap

(BCLP)

Green Clamp Cap

(GCLP)

Red Clamp Cap

(RCLP)

Blue Video Output

(BOUT)

Green Video Output

(GOUT)

Red Video Output

(ROUT)

Bright

Vout

+

-

PIN 17

Clamp Cap for Brightness
(During Clamp Gate Low)

vcc

Video Out

PIN 18

663uA

19 GND3 - Normal Ground
20 VCC3 - Drive V

CC

6