R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS R/G/B VIDEO AMPLIFIER KA2140B 28-DIP-600A 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 × 1024. It contains 3 matched R/G/ B video Amplifiers with Blank signal and provides a flexible interfacing to DC controlled adjustment system. FUNCTIONS • R/G/B Video Amplifier • OSD Interface ORDERING INFORMATION • Contrast/OSD Contrast/SUB Contrast Control • Brightness Control Device KA2140B Package 28-DIP Operating Temperature -25 °C ~ +80 °C • Blank/Clamp Gate • Video Clamp 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 1 GOSD 2 BOSD 3 RIN SWITH CONTROL VIDEO SUB_CONTRAST CONTROL 4 5 VCC1 6 GND1 7 _ A2 + _ VI/OSD_SW _ A1 + gm1 OSD CONTRAST VIDEO OSD SWITCH + VIDEO SUB_CONTRAST 28 RDRIVE 27 GDRIVE 26 BDRIVE 25 BRIGHT 24 RCLP 23 ROUT 22 VCC3 21 GND4 20 GOUT -A5 + VIDEO CONTRAST _ A3 + -A4 GIN 8 VCC2 9 GND2 10 19 GCLP BIN 11 18 BOUT GND3 12 17 BCLP CONST 13 16 BLK OSD _CONST 14 15 CLP _ gm2 + 2 CONTRAST CONTROL OSD CONTRAST CONTROL CLAMP GATE BLANK GATE R/G/B VIDEO AMPLIFIER WITH OSD INTERFACE FOR MONITORS KA2140B PIN CONFIGURATIONS Table 1. Pin Configurations Pin No Symbol I/O Configurations 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 VCC1 - VCC (Normal) 7 GND1 - Ground 1 8 GIN I Green Video Input 9 VCC2 - VCC (Normal) 10 GND2 - Ground 2 11 BIN I Blue Video Input 12 GND3 - Ground 3 13 CONST I Contrast Control 14 OSD_CONST I OSD Contrast Control 15 GCLP I Clamp Gate Signal Input 16 BLK I Blank Gate Signal Input 17 BCLP - Blue Clamp Cap 18 BOUT O Blue Clamp Video Output 19 GCLP - Green Clamp Cap 20 GOUT O Green Video Output 21 GND4 - Ground 4 22 VCC3 - VCC (Output Part) 23 ROUT O Red Video Output 24 RCLP - Red Clamp Cap 25 BRIGHT I Brightness Control 26 BDRIVE I Blue Gain Control 27 GDRIVE I Green Gain Control 28 RDRIVE I Red Gain Control 3