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| R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2140B R/G/B VIDEO AMPLIFIER The KA2140B is a very high frequency video amplifier system with an OSD interface, intended to be used in monitor with high resolution up to 1280 x 1024. It contains 3 matched R/G/ B video Amplifiers with Blank signal and provides a flexible interfacing to DC controlled adjustment system. 28-DIP-600A FUNCTIONS * R/G/B Video Amplifier * OSD Interface * Contrast/OSD Contrast/SUB Contrast Control * Brightness Control * Blank/Clamp Gate * Video Clamp Device KA2140B Package 28-DIP Operating Temperature -25 C ~ +80 C ORDERING INFORMATION FEATURES * 3 - Channel R/G/B Video Amplifier, 130MHz Bandwidth * TTL OSD Input, 50MHz Bandwidth * DC Contrast Contol range: -38dB * DC SUB Contrast Control range: -11dB * Capable of 7.5VPP Output Swing Range * Video/OSD high speed Switch 1 KA2140B R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS BLOCK DIAGRAM ONE (RED) OF THREE CHANNELS ROSD GOSD 1 2 3 4 _ A1 + 28 27 26 VIDEO SUB_CONTRAST CONTROL RDRIVE GDRIVE BOSD VI/OSD_SW SWITH CONTROL BDRIVE BRIGHT 25 24 RIN VCC1 GND1 GIN 5 6 _ A2 + VIDEO OSD SWITCH OSD CONTRAST RCLP ROUT + VIDEO CONTRAST VIDEO SUB_CONTRAST -A5 gm1 + 7 _ A3 + -A4 8 VCC2 9 gm2 + GND2 10 11 12 13 14 OSD CONTRAST CONTROL CONTRAST CONTROL CLAMP GATE BLANK GATE BIN GND3 CONST OSD _CONST 2 _ _ 23 22 21 VCC3 GND4 20 GOUT GCLP 19 18 17 16 15 BOUT BCLP BLK CLP R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2140B PIN CONFIGURATIONS Table 1. Pin Configurations Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ROSD GOSD BOSD VI/OSD_SW RIN VCC1 GND1 GIN VCC2 GND2 BIN GND3 CONST OSD_CONST GCLP BLK BCLP BOUT GCLP GOUT GND4 VCC3 ROUT RCLP BRIGHT BDRIVE GDRIVE RDRIVE Symbol I/O I I I I I I I I I I I O O O I I I I Red OSD Input Green OSD Input Blue OSD Input Video or OSD Switch Red Video Input VCC (Normal) Ground 1 Green Video Input VCC (Normal) Ground 2 Blue Video Input Ground 3 Contrast Control OSD Contrast Control Clamp Gate Signal Input Blank Gate Signal Input Blue Clamp Cap Blue Clamp Video Output Green Clamp Cap Green Video Output Ground 4 VCC (Output Part) Red Video Output Red Clamp Cap Brightness Control Blue Gain Control Green Gain Control Red Gain Control Configurations 3 |
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