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File name KA2500.pdf

APRIL. 1998 DATA SHEET KA2500 I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS KA2500 I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER 28-DIP-600A The KA2500 is a very high frequency video amplifier system with I2C Bus control used in Monitors with high resolution up to1280 Ч 1024. It contains 3 matched R/G/B video Amplifiers with OSD interface and provides flexible interfacing to I2C Bus controlled adjustment systems. FUNCTIONS · R/G/B Video Amplifier · OSD Interface · I2C 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 Device KA2500 Package 28-DIP-600A Operating Temperature -20 °C ~ +75 °C ORDERING INFORMATION FEATURES · 3 - Channel R/G/B Video Amplifier, 150MHz @f-3dB · I 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 2 · 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 KA2500 I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS BLOCK DIAGRAM ONE (RED) OF THREE CHANNELS ROSD GOSD 1 OSD INTERFACE OSD RASTER VIDEO HALF-TONE OSD CONTRAST BLK VIDEO OSD SWITCH A2 26 ROUT CLP + VIDEO CONTRAST SUB CONTRAST A1 2 27 A3 gm2 RCLP RCT BOSD VCC2 3 9 gm1 HALF-TONE 17 23 + + Cut Off VCC3 + 22 21 GND3 BOUT RIN VCC1 5 6 CLP R/G/B CUT OFF CONTROL (07/08/09H) R/G/B DRIVE CONTROL (02/03/04H) CLP BLK GND1 7 CONTRAST CONTRAL (00H) OSD CONT CONTROL (05H) 20 BCLP BCT CUT OFF EXT OFFSET D3:5 (0AH) CUT OFF INT/EXT SWITCH(0AH) BRIGHTNESS CONTROL (01H) GIN 8 B/U INTERFACE VIDEO/OSD SWITCH CLAMP GATE VIDEO HALF-TONE OSD RASTER SELECT VIDEO-HALF TONE SWITCH D1(0AH) 15 CUT OFF BRIGHT (06H) B/U VI/OSD_SW 28 4 24 GOUT 25 16 GCLP GCT OSD RASTER COLOR D6:7(0AH) SOFT BLANK D0(0AH) CLP 18 BLANK GATE BIN BLK 10 12 ABL 19 I2 C BUS CONTROL INTERFACE & CONTROL 14 SDA GND(L) 11 13 SCL 2 I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS KA2500 PIN CONFIGURATION 1 2 ROSD B/U RCLP 28 27 GOSD 3 4 BOSD VI/OSD_SW RIN ROUT 26 GCLP GOUT 25 24 5 KA2500 I/O I I I I I I - 6 7 8 9 VCC1 VCC3 23 22 21 20 GND1 GIN VCC2 GND3 BOUT BCLP 10 BIN BLK CLP 19 11 GND(L) 18 12 ABL RCT 17 13 SCL GCT 16 14 SDA BCT 15 Table 1. Pin Configuration Pin No 1 2 3 4 5 6 7 8 9 Symbol ROSD GOSD BOSD VI/OSD_SW RIN VCC1 GND1 GIN VCC2 Configuration Red OSD Input Green OSD Input Blue OSD Input Video o