HIGH SPEED/HIGH VOLTAGE VIDEO AMPLIFIER 1902 SERIES (315) 70

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HIGH SPEED/HIGH VOLTAGE VIDEO AMPLIFIER 1902 SERIES (315) 70

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HIGH SPEED/HIGH VOLTAGE VIDEO AMPLIFIER
1902 SERIES
(315) 701-6751
4707 Road Liverpool, N.Y. 13088 100VPP Output Signal into 10PF Ultra Fast Transition Times-2.5nS User Adjustable Contrast Brightness Compatible Blanking Board Reference Output Customized Versions Available Upon Request Available DSCC 5962-8997201HX
MIL-PRF-38534 CERTIFIED
DESCRIPTION:
1902 Series high speed, high voltage video amplifiers designed drive cathode today's high performance CRT's. 1902 user adjustable contrast brightness levels also comes with blanking function. 1902 directly connected many video sources including RS170, RS343 high speed video converters. 1902 available four versions different applications. 1902-0 internal high voltage resistor inductor allowing user dissipate much power externally. 1902-2, 1902-4 1902-6 each have internal resistor-inductor designed optimum bandwidth. 1902-6 slightly lower bandwidth operated from +130V. Each version 1902 packaged power flatpack that directly connected heat sink using standard 4-40 screws.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Helmet Mounted Displays High Resolution Displays High Resolution Monochrome Displays Automatic Test Equipment
PIN-OUT INFORMATION
Blank -Input +Input
VGAIN VOFF VREF +VHV +VHV +VHV
+VHV Output Cath. Current
Rev. 5/02
ABSOLUTE MAXIMUM RATINGS
+VHV
ELECTRICAL SPECIFICATIONS
Parameter
STATIC Quiescent Current High Voltage Supply INPUT Input Bias Current Blank Input Current Offset Adjust Input Current Gain Adjust Input Current Blank Input Pulse Width Common Mode Rejection Ratio Input Impedance Input Capacitance Blank Mode Input Rejection Gain Adjust Rejection Internal OUTPUT Reference Output Voltage Blank Mode Offset Offset Voltage Gain Output Voltage High Output Voltage Transition Times Linearity Error Gain Linearity Thermal Distortion IOUT<2mA V=VHV-VOUT VOFF=1V VBLANK=2.4V VGAIN=5V V=VHV-VOUT VOFF=0V VGAIN=3V V=VHV-VOUT VOFF=5V VIN=0.6V F=10KHz VGAIN=3V Both Inputs VGAIN=3V F=10KHz VGAIN=3V F=10KHz VIN=0.6V VOUT=Max TR=TF<0.5nS VGAIN VOFF=1V VCM=0.5V VOFF=1V VIN=0.2V VCM=0.5V 1,2,3 1,2,3 1,2,3 -3xRp 3xRp VCM=0V VBLANK=0.4V VBLANK=2.4V VOFF=1V VGAIN=5V Normal Operation VCM=±0.5V F=10Hz Either Input F=DC Either Input VBLANK=2.4V VIN=0.3V V=VHV-VOUT VGAIN=5V ±250 ±250 ±250 ±250 VCM=0V +15V VCM=0V -10.5V 125°C QOUT/QCAS 1,2,3 1,2,3 °C/W -100 -100 -100 -100
Test Conditions
MSK1902-2 MSK1902-4 Group MSK1902-0 Subgroup Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
MSK1902-6 Min. Typ. Max.
Thermal Resistance Case
±2xRp ±10xRp
±2xRp ±10xRp
±2xRp ±10xRp
±2xRp
±10xRp
Power Supply Rejection Ratio +VCC -VEE=Nom
-3xRp 3xRp -3xRp 3xRp -3xRp 3xRp
NOTES:
+VCC +15V, -VEE -10.5V, VBLANK =0.4V, VGAIN VOFF ±VIN CL=10pF, VHV=typical value TC=25°C unless otherwise specified. Guaranteed design tested. Typical parameters representative actual device performance reference only. RP=Internal except 1902-0. External value unless otherwise specified 1902-0. Industrial grade suffix devices shall tested subgroups unless otherwise specified. Military grade devices ("B" suffix) shall 100% tested subgroups 1,2,3 Subgroups testing available upon request. Subgroup TA=TC=+25°C TA=TC=+125°C TA=TC=-55°C
Rev. 5/02
+VCC -VEE VGAIN VOFF
High Voltage Supply (1902-0) (1902-2) (1902-4) (1902-6) Positive Supply Voltage Negative Supply Voltage Differential Input Voltage Common Mode Input Voltage Gain Adjust Input Voltage Offset Adjust Input Voltage
+110V +110V +75V +130V +17V -12V -0.6 -0.6
VBLANK IREF
-0.6 Blank Input Voltage Reference Output Current Storage Temperature Range -65°C +150°C 300°C Lead Temperature Range Seconds) 175°C Junction Temperature 290mA Current Through Case Operating Temperature Range -55°C +125°C (All Devices Suffix) -40°C +85°C (All Devices Suffix)
Units
APPLICATION NOTES POWER SUPPLIES
input stage 1902 requires power supplies +15V -10.5V optimum operation. negative power supply increased -12V -10.5V available, additional power dissipation will cause internal temperature rise. Both voltage power supplies should effectively decoupled with tantalum capacitors least 4.7µF) connected close amplifier's pins possible. 1902 internal 0.01µF capacitors that also improve high frequency performance. case, also recommended 0.1µF decoupling capacitors +15V -10.5V supplies well. high voltage power supply (+VHV) connected amplifier's output stage must kept stable possible. internal external connected +VHV such, amplifier's output directly related high voltage value. +VHV pins hybrid should decoupled ground with large capacitor possible improve output stability.
VIDEO INPUTS
video input signals should kept below ±2VMAX total, including both common mode offset signal levels. input structure 1902 designed ±0.714Vpp RS343 signals. either input used should connected directly analog ground through resistor ground input offset currents minimized.
OUTPUT PROTECTION
output 1902 should protected from transients connecting reverse biased ultra-low capacitance diodes from output both +VHV ground. output also protected from voltages inserting small value (50-100) resistor series with amplifier output. This resistor will reduce system bandwidth along with load capacitance, series inductor reduce problem substantially.
VGAIN CONTROL INPUT
VGAIN control (contrast) input designed allow user vary video gain. simply applying voltage from VREF, video gain linearly adjusted from 80V/V. VGAIN input should connected VREF through ground. convenient stable gain adjustment, 0.1µF bypass capacitor should connected near VGAIN input prevent output instability noisy sources. Digital gain control accomplished connecting converter VGAIN pin. However, some temperature tracking performance lost when using external voltage source other than VREF gain adjustment. overall video output 1902 characterized using following expression: Vpp=VHV-VOUT VHV-VOUT=(VIN) (VGAIN) (0.1) (Rp) (0.9) Here sample calculation 1902-2: Given information: VIN=0.7V VGAIN=1VDC Rp=400 (internal) VHV=100VDC VHV-VOUT=(0.7V) (1V) (0.1) (400) (0.9) VHV-VOUT=25.2V Nominal expected video output would swing from approximately +100V +74.8V assuming that VOFF=0V. This calculation should used nominal result because overall gain vary much ±20% internal high speed device variations. Changing ambient conditions also affect video gain amplifier much PPM/°C. wise connect video amplifiers common heat sink maximize thermal tracking when multiple amplifiers used applications such systems. Additionally, only VREF outputs should shared three amplifiers. This voltage should buffered with suitable drift op-amp best tracking performance.
SUPPLY SEQUENCING
power supply sequence +VHV, +VCC, -VEE followed other control inputs. power supply sequencing possible, time difference between each supply should less than five milliseconds. control signals being generated from impedance source other than VREF output, reverse biased diodes should connected from each input (VGAIN, VOFF) +VCC pin. This will protect inputs until +VCC turned
VIDEO OUTPUT
When power first applied VIN=VGAIN=VOFF=0V, output will practically +VHV rail voltage. output voltage function value also VGAIN VOFF inputs. maximum output voltage swing 1902 variants determined (250mA) (Rp). bandwidth amplifier largely depends both Hybrid pins directly connected Additional external resistance added reduce power dissipation, slower transition times will result. additional resistor used, must capacitive layout should minimize capacitive coupling ground (ie: ground plane under Rp). 1902 series conservatively specified with values which yield about overshoot. Additional peaking obtained using high self-resonant frequency inductor series with pins. Since this value inductance very dependent circuit layout, best determine value experimentation. good starting point typically 0.47µH 1902-0 0.0047µH remaining devices. external resistors inductors used, sure connect high frequency bypass capacitors directly from pins ground.
Rev. 5/02
APPLICATION NOTES CON'T VOFF CONTROL INPUT
brightness (output offset) linearly adjusted applying VREF voltage VOFF input pin. output quiescent voltage range from approximately (5µA) (Rp) (100mA) (Rp) from +VHV. This control voltage normally generated connecting VOFF control potentiometer between VREF ground. VOFF input should bypassed with 0.1µF capacitor ground placed close possible hybrid. This voltage stable system source. Keep hybrid power dissipation mind when adjusting output quiescent voltage. Practically voltage seen across This power must taken into account when high currents used. quiescent level close +VHV, power dissipation will minimal rise time will suffer slightly. quiescent level from VHV, power dissipation will increase dramatically output fall time will limited. output black level obviously dependent system requirements little experimentation will strike optimum balance between power dissipation bandwidth. Total current through should limited less than 290mA when operating from power supplies greater than 90V. gain adjust alone current 250mA (ie: 250mApp=100Vpp/400). Typically, most applications about from +VHV black level.
BLANK INPUT
video input electrically disconnected from amplifier applying high input blank pin. When this occurs, output will approximately +VHV. VGAIN VOFF control pins have little effect output when blank mode. When compatible blank input used, must connected ground enable amplifier. blank input will float high when left unconnected which will disable video output.
VREF OUTPUT
1902 board buffered zener reference output. VREF output nominally 5.5V full temperature test limits 5.2V 5.8V This output provided gain offset adjustment source current.
THERMAL MANAGEMENT
1902 package mounting holes that allow user connect amplifier heat sink chassis. Since package electrically isolated from internal circuitry, mounting insulators required desired best thermal performance. inch/pounds mounting device heat sink. power dissipation amplifier depends mainly load requirements, bandwidth, pixel size, black level value following table illustrates examples:
PERCENT SIGNAL BLANK 100% 100% BLACK WHITE OUTPUT AVE. 13.3W 8.4W TOTAL AVE. 2.5W 15.7W 2.5W 10.6W
DEVICE TYPE 1902-6 1902-6 1902-4 1902-4
+VHV 120V 120V
BLACK LEVEL 110V 110V
WHITE LEVEL
OUTPUT VOLTAGE
This table does include power dissipation output switching since this dependent individual load requirements. input stage power dissipation typically watts essentially independent output levels.
RESOLUTION TABLE TYPICAL
Display Resolution Maximun Pixel Time 182nS 52nS 38nS 26nS 12.6nS 11nS 8.9nS 5.8nS 2.8nS 860pS Minimum Pixel Clock Frequency 5MHz 19MHz 26MHz 38MHz 80MHz 90MHz 112MHz 170MHz 360MHz 1.2GHz Required Rise Time Required System Bandwidth (F-3dB) 6MHz 20MHz 28MHz 41MHz 84MHz 95MHz 120MHz 180MHz 380MHz 1.23GHz
1024 1024 1024 1280 1024 1664 1200 2048 2048 4096 3300
60nS 17nS 12.5nS 8.6nS 4.2nS 3.7nS 2.9nS 1.9nS 280pS
data assumes retrace time equal frame time 60Hz refresh rate.
Rev. 5/02
TYPICAL CONNECTION CIRCUIT
connection circuit shown above 1902-0 evaluation board. external components must located near ground planes possible. high quality resistor such Bradford Electronics FP10-400 required optimum response times. inductor with high self-resonant frequency that withstand currents required application. When using other variants 1902, place additional bypass capacitor pins series components utilized. should connect +VHV with short impedance path. additional application information, please contact MSK. Evaluation amplifiers with test boards available upon request.
NOTES:
Rev. 5/02
MECHANICAL SPECIFICATIONS
TRIANGLE INDICATES DIMENSIONS ±0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
PART NUMBER 1902-0 1902B-0 1902E-0 5962-8997201HX 1902-2 1902B-2 MSK1902E-2 5962-8997202HX 1902-4 1902B-4 MSK1902E-4 1902-6 1902B-6 MSK1902E-6 +VHV 110V 110V 110V 110V 110V 110V 110V 110V 130V 130V 130V INTERNAL NONE NONE NONE NONE TYPICAL RISE TIME 3.5nS 3.5nS 3.5nS 3.5nS 2.8nS 2.8nS 2.8nS 2.8nS 2.0nS 2.0nS 2.0nS 6.0nS 6.0nS 6.0nS SCREENING LEVEL Industrial Mil-PRF-38534 Class Extended Reliability DSCC-SMD Industrial Mil-PRF-38534 Class Extended Reliability DSCC-SMD Industrial Mil-PRF-38534 Class Extended Reliability Industrial Mil-PRF-38534 Class Extended Reliability
4707 Road, Liverpool, York 13088 Phone (315) 701-6751 (315) 701-6752 www.mskennedy.com
information contained herein believed accurate time printing. reserves right make changes products specifications without notice, however, assumes liability products. Please visit website most recent revision this datasheet.
M.S. Kennedy Corp.
Rev. 5/02

HIGH SPEED/HIGH VOLTAGE VIDEO AMPLIFIER 1902 SERIES (315) 70

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