Text preview for : KA2500.pdf part of SAMSUNG KA2500 RGB
Back to : KA2500.pdf | Home
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 × 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 or OSD Switch Red Video Input VCC (normal) Ground1 (normal) Green Video Input VCC (normal)
3
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 1. Pin Configuration Pin No 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Symbol BIN GND (L) ABL SCL SDA BCT GCT RCT CLP BLK BCLP BOUT GND3 VCC3 GOUT GCLP ROUT RCLP B/U I/O I I/O I/O I I I I I O O O I Blue Video Input Ground2 (logic) Automatic Beam Limit Serial Clock Serial Data Blue Cut Off Control Green Cut Off Control Red Cut Off Control Clamp Gate Signal Input Blank Gate Signal Input Blue Clamp Cap Blue Video Output Ground3 (drive part) VCC (drive part) Green Video Output Green Clamp Cap Red Video Output Red Clamp Cap Brightness Uniformity Configuration
4
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
PIN DESCRIPTION
Table 2. Pin Description Pin No Pin Name Schematic Description
1 2 3
Red OSD Input (ROSD) Green OSD Input (GOSD) Blue OSD Input (BOSD)
1.29/ 1.02V
VCC
OSD input signals are in TTL level and will be connected to ground when switching to video input
1.16/ 0.90V PIN 1
4
Video/OSD Switch (VI/OSD_SW)
6V
VCC
Video/OSD switch signal is TTL level PIN4 = "high", OSD input PIN4 = "Low", video input
PIN 4
5 8 10
Red Video Input (RIN) Green Video Input (GIN) Blue Video Input (BIN)
VCC
MAX input video signal is 0.7 Vpp
PIN 5
6 9
VCC1 VCC2
Supply voltage (except drive part)
5
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 2. Pin Description (Continued) Pin No 7 11 15 16 17 Pin Name GND1 GND2 (GND (L) ) Blue Cut-Off (BCT) Green Cut-Off (GCT) Red Cut-Off (RCT)
0~180uA 0~540uA 80uA 160uA 320uA
Schematic
Description Ground (analogue) Ground (logic) Cut-Off Control Output
PIN 17
Cut-Off BRT
Cut-Off
Cut-Off Offset
18
Clamp Gate Input (CLP)
5.1V
VCC
Video amp active when clamp gate signal is in low TTL level. Clamp gate Min. pulse width : 0.2us, at fh: 50KHz
PIN 18
19
Blank Gate Input (BLK)
7V
VCC
Video amp blanks video signal when blank gate signal is in low TTL level.
PIN 19
6
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
Table 2. Pin Description (Continued) Pin No Pin Name Schematic Description
26 24 21
Red Video Output (ROUT) Green Video Output (GOUT) Blue Video Output (BOUT)
VCC
Video signal output
PIN 26
20 25 27
Blue Clamp Cap (BCLP) Green Clamp Cap (GCLP) Red Clamp Cap (RCLP)
PIN 27
Brightness control activated by charging and discharging of the external cap. (0.1µF) (During low clamp gate)
22 23
GND3 VCC3 SCL SDA
54uA
-
Ground (drive part) Supply voltage (drive part)
13 14
27uA
3.22V
Serial clock input port of I2C BUS Serial data input port of I2C BUS
PIN 13
7
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 2. Pin Description (Continued) Pin No Pin Name Schematic Description
28
B/U Input (B/U)
VCC
Parabola input via AC coupling cap
4.6V PIN 28
100uA
12
ABL Input (ABL)
VCC
Automatic beam limitation input (Control Range: 0.5 ~ 4.5V)
PIN 12
8
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
ABSOLUTE MAXIMUM RATING (TA = 25 °C) (1)
Table 3. Absolute Maximum Rating Value No 1 2 3 4 5 Item Maximum Supply Voltage Operating Temperature (2) Storage Temperature Operating Supply Voltage Power Dissipation Symbol Min VCC1/2/3/VDD Topr Tstg Vccop PD -20 -65 11.4 Typ 12.0 Max 13.2 75 150 12.6 2.0 V °C °C V (3) W Unit
THERMAL & ESD PARAMETER
Table 4. Thermal & ESD Parameter Value No 1 2 3 4 5 Item Thermal Resistance (Junction-ambient) Junction Temperature Human Body Mode (C = 100p, R = 1.5k) Machine Model (C = 200p, R = 0) Charge Device Model Symbol Min ja Tj HBM MM CDM 2 300 800 Typ 46 150 Max °C/W °C KV V V Unit
ELECTRICAL CHARACTERISTICS
DC Electrical Characteristics Ta = 25 °C, VCC1 = VCC2 = VCC3 = 12V; V4 = 0V; unless otherwise stated Table 5. DC Electrical Characteristics Parameter Supply Current Clamp Gate Low Input Voltage Clamp Gate High Input Voltage Symbol ICC(4) V151 V15h Min 85 0.8 0.8 Typ 110 1.5 1.5 Max 135 3.0 2.0 Unit mA V V
9
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 5. DC Electrical Characteristics (Continued) Parameter Clamp Gate Low Input Current Clamp Gate High Input Current Blank Gate Low Input Voltage Blank Gate High Input Voltage Blank Gate Low Input Current Blank Gate High Input Current Video Input bias Voltage Output Clamp Cap Charge Current Output Clamp Cap Discharge Current Video Output Low Voltage Video Output High Voltage Video Black Level Output Voltage (POR) Video Black Level Output Voltage Video Output Blanked Voltage Contrast/Drive Control Input Current Spot Killer Voltage Symbol I15l I15h V16l V16h I16l I16h Vbias Iclamp+ IclampVOL VOH VOBL VO BL(5) VOB losd, ldirve lcon Vspot Min -5.0 0.8 0.8 -5.0 1.6 0.45 -1.10 6.2 1.9 -0.3 9.2 Typ -2.0 0.01 1.5 1.5 -2.0 0.01 1.9 0.75 -0.75 100 7.5 2.2 0.1 0.25 10.4 Max 1.0 3.0 2.0 1.0 2.2 1.10 -0.45 200 9.0 2.5 0.3 0.2 1 11.2 Unit µA µA V V µA µA V mA mA mV V V V V uA V
10
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
AC Electrical Characteristics Ta = 25 °C, VCC1 = VCC2 = VCC3 = 12V; V4 = 0V. Vin = 0.56Vpp Manually adjust Video Output pins 21, 24 and 26 to 4V DC for the AC test (11) unless otherwise stated(12) Table 6. AC Electrical Characteristics Parameter Video Amplifier Gain Contrast Attenuation 1 Contrast Attenuation 2 Drive Attenuation1 Drive Attenuation 2 Absolute Gain Match Gain Change between Amplifiers Video Amplifier Distortion Video Amp Bandwidth (7,8) Video Output Rise Time (7) Video Output Fall Time (7) Video Amplifier 10kHz Isolation Video Amplifier 10MHz Isolation Blank Output Rise Time (7) Blank Output Fall Time (7) End of Blanking Propagation Delay Start of Blanking Propagation Delay Symbol AV max Avc1 Avc2 Avd1 Avd2 AV match(6) A V track(7) THD f (-3dB) tr (Video) tf (Video) Viso_10K(9) Viso_10M(7,9) tr (Blank) tf (Blank) tr-prop (Blank) tf-prop (Blank) Min 15.5 -4.5 -3 -11 -1 -1 130 Typ 17.5 -6.0 -38 -4 -8 1 150 2.3 3.2 -65 -50 6 10 23 20 Max 19.5 -7.5 -35 -5 -5 1 1 5 2.8 4.0 -45 -35 15 30 50 45 Unit dB dB dB dB dB dB dB % MHz ns ns dB dB ns ns ns ns
OSD Electrical Characteristics Ta = 25 °C, V CC1 = VCC2 = VCC3 = 12V; V19 = 4V; V12 = V28 = 0V; V1 = V2 = V3 = 4V; V4 = 4V; unless otherwise stated Table 7. OSD Electrical Characteristics Parameter OSD Input Low Input Voltage Symbol VOSDI Min 0.4 Typ 1.3 Max 3.0 Unit V
11
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Table 7. OSD Electrical Characteristics (Continued) Parameter OSD Input High Input Voltage OSD Select Low Input Voltage OSD Select High Input Voltage OSD Select Low Input Current OSD Select High Input Current OSD Output Black Level OSD Output Voltage OSD Output Vpp Attenuation Output Match between Channels Video to OSD Switch Time (7) OSD to Video Switch Time (7) Video to OSD Propagation Delay OSD to Video Propagation Delay OSD Rising Time OSD Falling Time OSD Rising Propagation Delay OSD Falling Propagation Delay Video/OSD 10kHz Isolation Video/OSD 10MHz Isolation Symbol VOSDh V4I V4h I4I I4h VBLV-OSD VOSD VOSD_ATT VOSD tr (OSD S) tf (OSD S) tr-pr (OSD S) tf-pr (OSD S) tr (OSD) tf (OSD) tr_pr (OSD) tf_pr (OSD) Iiso10K (OSD) Iiso10M (OSD) Min 0.4 0.8 0.8 -10 70 2.6 30 -7 Typ 0.8 1.6 1.6 -5 100 0.1 3.6 50 4 11 11 12 4 5 7 9 -60 -50 Max 1.2 3.0 2.0 130 0.2 4.6 70 7 10 20 25 25 8 10 15 20 -40 -35 Unit V V V µA µA V VPP % % ns ns ns ns ns ns ns ns dB dB
12
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
I2C BUS Recommended Operating Conditions Table 8. I2C BUS Recommended Operating Conditions Parameter Input High Level Voltage Input Low Level Voltage SCL Clock Frequency Hold Time Before a new transmission can start Hold Time for Start Condition Set-up Time for Stop Conditions The Low Period of SCL The High Period of SCL Hold Time Data Set-up Time Data Rise Time of SCL Fall Time of SCL Symbol VinH VinL fSCL tBUF tHDS tSUP tLOW tHIGH tHDAT tSUPDAT tR tF Min 3.0 1.3 0.6 0.6 1.3 0.6 0.3 0.25 Typ Max 1.5 200 1.0 3.0 Unit V V kHz uS uS uS uS uS uS uS uS uS
I2C BUS Timing Requirement
tBUF
tHDAT
SDA tHDS SCL tSUPDAT tSUP
tHIGH
tLOW
13
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
NOTES; Absolute Maximum Rating Indicates the limit beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional but do not guarantee specific performance limits. For guaranteed specifications and test conditions, See the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. 3. VCC supply pins 6, 9, and 23 must be externally wired together to prevent internal damage during VCC power on/off cycles. 4. The supply current specified is the quiescent current for VCC1/VCC2 and VCC3 with RL = . The supply current for VCC3 (pin 23) also depends on the output load. 5. Output voltage is dependent on load resistor. Test circuit uses RL = 390 6. Measure gain difference between any two amplifiers Vin = 560mVpp. 7. When measuring video amplifier bandwidth or pulse rise and fall times, a double sided full ground plane printed circuit board without socket is recommended. Video amplifier 10MHz isolation test also requires this printed circuit board. The reason for a double sided full ground plane PCB is that large measurement variations occur in single sided PCBs. 8. Adjust input frequency from 10MHz (AV max reference level) to the-3dB frequency (f -3dB). 9. Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation. Terminate the undriven amplifier inputs to simulate generator loading. Repeat test at fin = 10MHz for Iso_10MHz. 10. A minimum pulse width of 200 ns is guaranteed for a horizontal line of 15kHz. This limit is guaranteed by design. if a lower line rate is used a longer clamp pulse may be required. 11. During the AC test the 4V DC level is the center voltage of the AC output signal. For example. if the output is 4Vpp the signal will swing between 2V DC and 6V DC. 12. These parameters are not tested on each product which is controlled by an internal qualification procedure. 1. 2.
14
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
FUNCTIONAL DESCRIPTION
Contrast (OSD Contrast Adjustment) (8-bits) The contrast adjustment is made by controlling simultaneously the gain of three internal variable gain amplifiers through the I2C bus interface. The contrast adjustment allows you to cover a typical range of 38dB.
Brightness Adjustment (8-bits) The brightness adjustment controls to add the same black level (pedestal) to the 3-channel/R/G/B signals after contrast amplifier by I2C BUS.
Cut-Off Brightness Adjustments (8-bits) The Cut-Off Brightness adjustment is made by simultaneously controlling the external cut-off current. Cut-Off (SUB Contrast) Adjustment (8-bits × 3) These adjustments are used to adjust the white balance, and the gain of each channel is controlled by I2C BUS. The SUB contrast adjustment allows you to cover a typical range of 11dB.
OSD Inputs The KA2500 includes all the circuitry necessary to mix OSD signals into the R/G/B video signal. You need 4 pins for this function. (R/G/B OSD, OSD blanking)
Serial Interface The 2-wires serial interface is an I2C BUS interface. The slave address of the KA2500 is DC (hexadecimal) Bit8 1 Bit7 1 Bit6 0 Bit5 1 Bit4 1 Bit3 1 Bit2 0 Bit1 0 (W)
Data Transfer All bytes are sent MSB (Most Significant Bit) bit first and the write data transfer is closed by a stop. The MCU can write data into the KA2500 registers. To do that, after a start, the MCU must send: - The I2C address slave byte with a low level for R/W bit (bit1) - The byte of the interinal register address where the MCU wants to write data (SUB Address) - The data - Stop
15
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
I2C BUS Write Operation
MSB LSB
SCL
transter
SDA
START Slave address ACK
Register address
ACK
Data byte
ACK
STOP
Register Description Register Sub Address (Slave address: DCH) Sub Address (Hex) 00 01 02 03 04 05 06 07 08 09 0A Register Names Contrast control Brightness control (3-ch) SUB Contrast control (R) SUB Contrast control (G) SUB Contrast control (B) OSD Contrast control Cut-off Brightness control Cut-off control (R) Cut-off control (G) Cut-off control (B) HS2 l HS1 l CS3 l CS2 l CS1 l CT l HT l SBLK DAC bits 8 bits 8 bits 8 bits 8 bits 8 bits 8 bits 8 bits 8 bits 8 bits 8 bits Int. value (Hex) 80 80 80 80 80 80 80 80 80 80 20
HT: Video & OSD Half Tone ctrl switch (1: ON, 0: OFF) HS2/HS1: OSD Raster Color Switch for Video Half Tone (HT = 1) HS2 0 0 1 1 HS1 0 1 0 1 OSDR 0 0 0 0 OSDG 0 1 0 1 OSDB 0 0 1 1 Half Tone Black Green Blue Cyan
CT: Cut-off Control INT/EXT (0:INT/1: EXT) select switch (DC/AC mode) CS1/CS2/CS3/: 80/160/320uA Cut-Off ctrl EXT offset current Switch (CT = 1) SBLK: Soft Blanking switch (1: ON, 0: OFF)
16
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
Contrast Register (SUB ADRS: 00H) (Vin = 0.56Vpp, bright: 40H, subcont: FFH) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1 Contrast (Vpp) 0 1.12 4.2 0.0164 Gain (dB) -30.0 11.5 17.5 O Int. value (Hex)
Increment/bit
Brightness Register (3-ch) (SUB ADRS: 01H) (cont: 40H, subcont: FFH) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1 Brightness (Vpp) 0 2 4 0.0156 O Int. value (Hex)
Increment/bit
SUB Contrast Register (R/G/B-ch) (SUB ADRS: 02/03/04H) (Vin=0.56Vpp, bright: 40H, cont: FFH) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1 SUB Contrast (Vpp) 1.33 2.65 4.2 0.0123 Gain (dB) 7.5 13.5 17.5 O Int. value (Hex)
Increment/bit
OSD Contrast Register (SUB ADRS: 05H) (VOSD = TTL, bright: 40H, subcont: FFH) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1 OSD Contrast (Vpp) 0 3.7 3.5 0.0289 Gain (dB) O Int. value (Hex)
Increment/bit
17
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Cut-Off Brightness Register (3-ch) (SUB ADRS: 06H) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1 Cut-Off Brightness (µA) 0 75 150 0.588 O Int. value (Hex)
Increment/bit Cut-Off Register (R/G/B-ch) (SUB ADRS: 07/08/09H) (cont = 80H, subcont: FFH, INT: CT=0, EXT: CT=1) Hex 00 80 FF B7 0 1 1 B6 0 0 1 B5 0 0 1 B4 0 0 1 B3 0 0 1 B2 0 0 1 B1 0 0 1 B0 0 0 1
Cut-Off INT (V) -0.5 0 0.5 3.9mV
Cut-Off EXT(µA) 0 250 500 1.96
Int. value (Hex)
O
Increment/bit
18
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
APPLICATION BOARD CIRCUIT
VCC=12V 12V + 100uF 0.1uF 100 1
KA78T05
Vin GND Vout
3
5V
2
BU In ROSD In 33 1 ROSD B/U 28 0.1uF
GOSD In 33 2 GOSD RCLP 27
0.1uF
BOSD In
Red Out 33 3 BOSD ROUT 26 390
VI/OSD SW In 33 4 VI/OSD_SW GCLP 25
0.1uF
Red In 33 75
10uF
Green Out 5 RIN GOUT 24 390 6 23 0.1uF 7 GND1 GND3 22 + 100uF
+
0.1uF
VCC1
VCC3
+ 100uF
KA2500
Green In 33 75 10uF Blue Out 8 GIN BOUT 21 390 9 + 100uF Blue In 33 75 0.1uF 10uF 10 19 100 20 0.1uF 5V BLK In BIN BLK
+ +
11
VCC2
BCLP
CLP In GND(L) CLP 18 100
ABL In 100 5V 2K + 47uF 12 0.1uF 13 16 12V
75K
75V ABL RCT 17
75K BAV21
2K
SCL
GCT
KSP92
14 SCL SDA 100 100
SDA
BCT
15
+
1uF 100V
KSP42
0.47uF 2.2K 50V
+
75V
75K
100 12V 1 SCLK 2 SDAT 1 3 ACK 2 4 3 4 5 6 7 12 11 10 9 8 SCL SDA 100 100 13
75K
BAV21
74HCT125
14
5V
1uF + 100V KSP42
KSP92
0.47uF 2.2K 50V
+
75V
75K
12V
75K
BAV21
KSP92
2.2K
0.47uF 50V
1uF + 100V
KSP42
+
19
20 KA2500
75V
75K
VCC=12V
+ 100uF
0.1uF
R OSD
33
1 ROSD
0.1uF
KSP92
B/U
75V
28 +
KSP42
BU
12V
75K
BAV21
G OSD
APPLICATION CIRCUIT
B OSD
33
2 GOSD
2.2K
RCLP 27
0.1uF
1uF 100V
+
0.47uF 50V
OSD SW 100uF 0.1uF
+ RIN VCC
75V 0.1uF
75K
R In
33
3 BOSD
390 27
ROUT
26
G In
B In
33
4 VI/OSD_SW
0.1uF 100uF 0.1uF
GCLP +
12V
25 VEE ROUT
ABL
SCL
33
5 RIN GIN
390 27 0.1uF
1uF 100V
GOUT 24 GND
75K
BAV21
+
SDA
75
10uF
KSP92
CLP
6 VCC1 +
100uF 0.1uF
VCC3
23 GOUT
+
KSP42
BLK
+
2.2K
7 GND1
390
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
12V
GND3
22 BIN
27
0.47uF 50V
GND
75V 0.1uF
75K
33 10uF
8 GIN GND BOUT
KA2500
BOUT 21
To Cathode R Out G Out B Out
+
75
+
0.1uF
9 VCC2
100
BCLP
20
12V
75K
BAV21
100uF 0.1uF
10 BIN
100
75 33 10uF
BLK
19
KSP92 1uF 100V
+
+
KSP42
+ 0.47uF
2.2K 50V
11 GND(L)
100
CLP 18
100
+ 47uF 13 SCL GCT 16
100
12 ABL RCT
17
0.1uF
100
100
14 SDA
BCT 15
100
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
CHARACTERISTICS CURVE
Brightness (01H)
Vout [V] 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 18mV/Bit 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data Cut-Off (07/08/09H): 80H
Cut-Off Brightness Control (06H)
Iout [uA] 180 160 140 120 100 80 60 40 20 0.7uA/Bit 0 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data SW (0AH): 04H
21
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Int. Cut-Off Control (07/08/09H)
Bright (01H): 80H Vout [V] 2.7 2.5 2.3 2.1 1.9 1.7 4.6mV/Bit 1.5 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data
Ext. Cut-Off Control (07/08/09H)
Iout [uA] 600 500 400 300 200 100 2.14uA/Bit 0 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data Cut-Off BRT (06H): 00H
22
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
Contrast Control (00H)
Vout [Vpp] 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 18.36mVpp/Bit 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data Vin = 560mVpp
Contrast Control (00H)
Vout [dB] 20 10 0 -10 -20 -30 -40 -50 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data Drive (02/03/04H): FFH
23
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
Drive Control (02/03/04H)
Vout [Vpp] 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 10 20 30 40 50 60 70 80 90 12mVpp/Bit A0 B0 C0 D0 E0 F0 Data Vin = 560mVpp Contrast(00H):FFH
Drive Control (02/03/04H)
Contrast(00H): FFH Vout [Vpp] 18.00 16.00 14.00 12.00 10.00 8.00 6.00 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data
24
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
OSD Contrast Control (05H)
8 Vout [Vpp] 7 6 5 4 3 2 1 28.6mVpp/Bit 0 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data Drive (02/03/04H): FFH
OSD Contrast Control (05H)
Drive (02/03/04H): FFH Vout [dB] 30 20 10 0 -10 -20 -30 -40 0 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 Data
25
KA2500
I 2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
f-3dB (Video Preamp)
1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 1 25 50 75 100 125 150 175 200 225 250 275 300 325 350 f[MHz] Vout [dB]
ABL Characteristic
Vout [dB] 0 -2 -4 -6 -8 -10 -12 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 VABL [V]
26
I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS
KA2500
Modulation Rat [%]
BU Characteristic
25
20
15
10
5
0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VBU [Vpp]
27