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APRIL. 1998 DATA SHEET KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141 R/G/B VIDEO AMPLIFIER The KA2141 is a very high frequency Video amplifier system to be used in Monitor. It contains 3 matched R/G/B video amplifiers with blank signal and clamp gate pulse and provides a flexible interfacing to DC controlled adjustment system 20-DIP-300A FUNCTIONS · R/G/B Video Amplifier · Contrast/SUB contrast control · Brightness control · Blank gate/Clamp gate · Video clamp ORDERING INFORMATION Device KA2141 Package 20-DIP-300 Operating Temperature -25 °C ~ +70 °C FEATURES · 3 - channel R/G/B Video Amplifier: 85MHz bandwidth. · DC contrast control range: -38dB (0V ~ 4V) · DC sub contrast control range: -11dB (0V ~ 4V) · Maximum Video output level: 7Vpp · DC Brightness control range: 0V ~ 4V · Include blank gate and clamp gate signal processing block 1 KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS BLOCK DIAGRAM ONE (RED) OF THREE CHANNELS BDRIVE 1 20 BRIGHT GDRIVE 2 19 ROUT -A3 RDRIVE 3 2.4V _ A1 + VIDEO CONTRAST VIDEO SUB_CONTRAST + _ A2 18 RCLP RIN 4 -A4 17 GOUT VCC1 5 gm GIN GND1 7 BIN 8 CONTRAST CONTROL CLAMP GATE BLANK GATE CONST 9 CLP 10 2 + 6 _ VIDEO CONTRAST CONTROL VIDEO SUB_CONTRAST CONTROL 16 VCC2 15 GCLP 14 GND2 13 BOUT 12 BCLP 11 BLK R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141 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 BDRIVE GDRIVE RDRIVE RIN VCC1 GIN GND1 BIN CONST CLP BLK BCLP BOUT GND2 GCLP VCC2 GOUT RCLP ROUT BRIGHT Symbol I/O I I I I I I I I I O O O I Configurations Blue Gain Control Green Gain Control Red Gain Control Red Video Input VCC1 = 12V Green Video Input Ground1 Blue Video Input Contrast Control Input Clamp Gate Pulse Input Blank Gate Pulse Input Blue Clamp Capacitor Blue Video Output Ground2 Green Clamp Capacitor VCC2 = 12V Green Video Output Red Clamp Capacitor Red Video Output Brightness Control Input 3 KA2141 R/G/B VIDEO AMPLIFIER FOR MONITORS PIN DESCRITION Table 2. Pin Description Pin No Pin Name Schematic VCC Description 4 6 8 Red Video Input (RIN) Green Video input (GIN) Blue Video Input (BIN) Max input video signal is 0.7Vpp 2.4V Bias 9 1 2 3 Video Contrast (CONST) Blue Drive (BDRIVE) Green Drive (GDRIVE) Red Drive (RDRIVE) Video maximum contrast control range (0V ~ 4V) is -38dB Sub contrast control range (0V ~ 4V) is -11dB PIN 9 5 17 7 14 10 VCC1 VCC2 GND1 GND2 Clamp Gate Input (CLP) Video amp actives when clamp gate signal is in low TTL level Ground Supply voltage PIN 10 4 R/G/B VIDEO AMPLIFIER FOR MONITORS KA2141 Table 2. Pin Description(Continued) Pin No Pin Name Schematic Description 11 Blank Gate Input (BLK) Video amp actives when blank gate signal is in low TTL level PIN 11 VCC 18 16 13 Red Video output (ROUT) Green Video output (GOUT) Blue Video output (BOUT) PIN 13 Video signal output VCC 12 15 19 Blue Clamp Cap (BCLP) Green Clamp Cap (GCLP) Red Clamp Cap (RCLP) Br