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Details, datasheet, quote on part number:LM1203N
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Datasheet text preview:
LM1203 RGB Video Amplifier System
January 1996
LM1203 RGB Video Amplifier System
General Description
The LM1203 is a wideband video amplifier system intended for high resolution RGB color monitor applications In addition to three matched video amplifiers the LM1203 contains three gated differential input black level clamp comparators for brightness control and three matched attenuator circuits for contrast control Each video amplifier contains a gain set or ``Drive'' node for setting maximum system gain (Av e 4 to 10) as well as providing trim capability The LM1203 also contains a voltage reference for the video inputs For high resolution monochrome monitor applications see the LM1201 Video Amplifier System datasheet
Y Y
eatures
b 3dB) Three wideband video amplifiers (70 MHz Inherently matched ( g 0 1 dB or 1 2%) attenuators for contrast control Three externally gated comparators for brightness control Provisions for independent gain control (Drive) of each video amplifier Video input voltage reference Low impedance output driver
Y
Y
Y Y
F
Block and Connection Diagram
TL H 9178 1
FIGURE 1 Order Number LM1203N See NS Package Number NA28F
C1996 National Semiconductor Corporation
TL H 9178
RRD-B30M56 Printed in U S A
Absolute Maximum Ratings
p If Military Aerospace specified devices are required lease contact the National Semiconductor Sales S Office Distributors for availability and specifications upply Voltage VCC Pins 1 13 23 28 (Note 1) Voltage at Any Input Pin VIN Video Output Current I16 20 or 25 Power Dissipation PD (Above 25 C) Derate Based on iJA and TJ Thermal Resistance iJA Junction Temperature TJ 13 5V VCC t VIN t GND 28 mA 2 5W 50 C W 150 C Storage Temperature Range TSTG Lead Temperature (Soldering 10 sec ) ESD susceptibility
b 65
C to a 150 C 265 C
1 kV
Human body model 100 pF discharged through a 1 5 kX resistor
Operating Ratings (Note 9)
Temperature Range Supply Voltage (VCC) 0 C to 70 C 10 8V s VCC s 13 2V
Electrical Characteristics See Test Circuit (Figure 2) DC Static Tests S17
Label Is V11 Parameter Supply Current Video Input Reference Voltage
TA e 25 C VCC1 e VCC2 e 12V
21 26 Open V12 e 6V V14 e 0V V15 e 2 0V unless otherwise stated Conditions VCC 1 only Typ 73 24 Any One Amplifier Clamp Comparators On Clamp Comparators Off V14 e 0V V14 e 12V V5 8 or 10 e 0V V5 8 or 10 e 5V V5 8 or 10 e 0V V5 8 or 10 e 5V Between Any Two Amplifiers V15 e 2V Between Any Two Amplifiers V15 e 4V 50 12 16
b0 5
Tested Limit (Note 2) 90 0 22 26
Design Limit (Note 3)
Units (Limits) mA(max) V(min) V(max) mA(max) V(max) V(min) mA(max) mA(max) mA(min) mA(min) V(max) V(min) mV(max) mV(max)
lb V14 l V14 h I14 l I14 h lclamp a lclampb Vol Voh DVo(2V) DVo(4V)
Video Input Bias Current Clamp Gate Low Input Voltage Clamp Gate High Input Voltage Clamp Gate Low Input Current Clamp Gate High Input Current Clamp Cap Charge Current Clamp Cap Discharge Current Video Output Low Voltage Video Output High Voltage Video Output Offset Voltage Video Output Offset Voltage
20 08 20
b5 0
0 005 850
b 850
1 500
b 500
09 89
g0 5
1 25 82
g 50
g0 5
g 50
AC Dynamic Tests S17
Symbol Av max DAv 5V DAv 2V Av match DAv track1 DAv track2 THD f (b3 dB) tr tf Parameter Video Amplifier Gain Attenuation Attenuation
5V 2V
21 26 Closed V14 e 0V V15 e 4V unless otherwise stated Conditions V12 e 12V VIN e 560 mVp-p Ref Av max V12 e 5V Ref Av max V12 e 2V Typ 60
b 10 b 40
g0 5 g0 1 g0 3 g0 5 g0 7
Tested Limit (Note 2) 45
Design Limit (Note 3)
Units (Limits) V V(min) dB dB dB dB(max) dB(max) % MHz ns ns
Absolute gain match
Av
max
V12 e 12V (Note 5) V12 e 5V (Notes 5 8) V12 e 2V (Notes 5 8) V12 e 3V VO e 1 Vp-p V12 e 12V VO e 100 mVrms VO e 4 Vp-p VO e 4 Vp-p
Gain change between amplifiers Gain change between amplifiers Video Amplifier Distortion Video Amplifier Bandwidth (Notes 4 6) Output Rise Time (Note 4) Output Fall Time (Note 4)
05 7 0
5 7
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AC Dynamic Tests S17
Symbol Vsep 10 kHz Vsep 10 MHz Parameter
21 26 Closed V14 e 0V V15 e 4V unless otherwise stated (Continued) Conditions V12 e 12V (Note 7) V12 e 12V (Notes 4 7) Typ
b 65 b 46
Tested Limit (Note 2)
Design Limit (Note 3)
Units dB dB
Video Amplifier 10 kHz Isolation Video Amplifier 10 MHz Isolation
Note 1 VCC supply pins 1 13 23 28 must be externally wired together to prevent internal damage during VCC power on off cycles Note 2 These parameters are guaranteed and 100% production tested Note 3 Design limits are guaranteed (but not 100% production tested) These limits are not used to calculate outgoing quality levels ote 4 When measuring video amplifier bandwidth or pulse rise and fall times a double sided full ground plane printed circuit board without socket is recommendN ed Video Amplifier 10 MHz isolation test also requires this printed circuit board Note 5 Measure gain difference between any two amplifiers VIN e 1 Vp-p Note 6 Adjust input frequency from 10 kHz (Avmax ref level) to the b 3 dB corner frequency (f b 3 dB) ote 7 Measure output levels of the other two undriven amplifiers relative to driven amplifier to determine channel separation Terminate the undriven amplifier in N puts to simulate generator loading Repeat test at fIN e 10 MHz for Vsep e 10 MHz ote 8 DAv track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three attenuators It is the difference in gain change between any two amplifiers with the Contrast Voltage V12 at either 5V or 2V measured relative to an Av max condition V12 e 12V For example at Av max the three amplifiers gains might be 17 4 dB 16 9 dB and 16 4 dB and change to 7 3 dB 6 9 dB and 6 5 dB respectively for V12 e 5V This yields the N easured typical g 0 1 dB channel tracking m P te 9 Operating Ratings indicate conditions for which the device is functional See Electrical Specifications for guaranteed performance limits o
eaking capacitors See Frequency Response using various peaking cups graph on next page
T
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FIGURE 2 LM1203 Test Circuit 3
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