4707 dey road liverpool, n.y. 13088 (315) 701-6751 features: low cost complete amplifier system 100vpp output signal into 10pf ultra fast transition times: 2.3ns @ 50vpp user adjustable contrast and brightness ttl compatible blanking on board dc reference output customized versions readily available available with three lead bend options mil-prf-38534 certified iso-9001 certified by dscc m.s.kennedy corp. ultra high speed/voltage video amplifier series 1932 description: the msk 1932 series of high speed, high voltage video amplifiers is designed to directly drive the cathode of today's high performance crt's. the msk 1932 has user adjustable contrast and brightness levels and also comes with a blanking function. the msk 1932 can be directly connected to many video sources including rs170, rs343 and high speed video d/a converters. the msk 1932 is available in four versions for different applications. the msk 1932-0 has no internal high voltage resistor or inductor allowing the user to dissipate much of the power externally. the msk 1932-2, msk 1932-4 and the msk 1932-6 each have an internal resistor-inductor designed for optimum bandwidth. the msk 1932-6 has slightly lower bandwidth but can be operated from up to +130v. each version of the msk 1932 is packaged in an isolated 22 pin insulated ceramic substrate that can be directly connected to a heat sink using standard mounting techniques. the leads are available straight out, bent up or bent down. equivalent schematic helmet mounted displays high resolution rgb displays high resolution monochrome displays automatic test equipment medical monitors cae/cad station monitors typical applications 1 2 3 4 5 6 7 8 ground ground blank v ee -input +input ground vgain pin-out information output cath rtn vcc vcc ground ground 17 18 19 20 21 22 voff vref ground +v hv res +v hv res ground +v hv +v hv 9 10 11 12 13 14 15 16 rev. d 3/03 1
-0.6 to +6v 5ma -40c to +150c 300c 150c 290ma -40c to +125c absolute maximum ratings 1 2 3 4 5 6 7 +v cc = +15v, -v ee = -10.5v, v blank = v gain = v off = v in = 0v, c l =10pf, t c =25c unless otherwise specified. v hv =typical value for each dash number for all parameters. this parameter is quaranteed by design but need not be tested. typical parameters are representative of actual device performa nce but are for reference only. r p =internal r p except msk 1932-0. external value = 400 ? unless otherwise specified for the msk 1932-0. ? v is defined as the difference between +v hv and the output. parameter is 100% tested on production devices. parameter is sample tested in accordance with msk industrial grade quality devices. +110v +110v +75v +130v +17v -12v 2v 2v -0.6 to +6v -0.6 to +6v high voltage supply (1932-0) (1932-2) (1932-4) (1932-6) positive supply voltage negative supply voltage differential input voltage common mode input voltage gain adjust input voltage offset adjust input voltage +v hv v cc v ee v in v ic v gain v off blank input voltage reference output current storage temperature range lead temperature range (10 seconds) junction temperature current through rp case operating temperature (all devices) v blank i ref t st t ld t j i rp t c electrical specifications notes: units ma ma v c/w a a a a a ns db ? pf mv db ? v v v v v ns %gs % %gs min. - - 30 - - - - - - 30 - 10k - - 25 190 5.2 0 16 65 - - - - - max. 100 -100 110 35 50 600 400 10 10 - - - - - 420 5.8 6 52 - 20 4.0 2 2 2 static high volt age supply thermal resistance to case input input bias current offset adj ust input current gain adj ust input current bl ank input pulse width common mode rejection ratio input impedance input capacitance blank mode input rejection ? v gain adjust rejection ? v power supply rejection ratio internal rp output reference output voltage ? v min offset ? v max offset output vo ltage high output volt age low transistion times linearity error gain linearity thermal distortion parameter vcm=0v @ +15v vcm=0v @ -10.5v qout and qcas 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 +vcc and -vee=nom 5% 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 tr=tf<0.5ns vgain =4v voff=1v vcm=0.5v voff=1v vin=2.0v vcm=0.5v test conditions 1 max. 100 -100 130 35 50 600 400 10 10 - - - - - 420 5.8 10 52 - 20 8 2 2 2 typ. 75 -75 120 32 1 500 300 2 2 - 40 20k 2 - 30 400 5.5 3 42 118 14 6.5 - - - min. - - 30 - - - - - - 30 - 10k - - 25 380 5.2 0 32 115 - - - - - msk1932-6 max. 100 -100 75 35 50 600 400 10 10 - - - - - 210 5.8 6 26 - 20 2.8 2 2 2 typ. 75 -75 70 32 1 500 300 2 2 - 40 20k 2 - 30 200 5.5 3 21 68 14 2.3 - - - msk1932-4 typ. 75 -75 100 32 1 500 300 2 2 - 40 20k 2 - 30 400 5.5 3 42 98 14 3.4 - - - min. - - 30 - - - - - - 30 - 10k - - 25 380 5.2 0 32 95 - - - - - msk1932-2 max. 100 -100 110 35 50 600 400 10 10 - - - - - - 5.8 6 52 - 20 5.5 2 2 2 typ. 75 -75 100 32 1 500 300 2 2 - 40 20k 2 - 30 0 5.5 3 42 98 14 4.0 - - - min. - - 30 - - - - - - 30 - 10k - - 25 - 5.2 0 32 95 - - - - - msk1932-0 mv - - 2xrp - - 2xrp - - 2xrp - - 2xrp 3xrp rp -3xrp 3xrp rp -3xrp 3xrp rp -3xrp 3xrp rp -3xrp mv 68 55 138 110 72 138 110 72 2 3 3 6 7 7 3 3 3 3 3 3 4 3 4 6 5 6 5 6 6 6 7 6 6 quiescent current blank i nput current ? v blank mode voltage gain 4 5 6 6 v/v 145 120 72 36 10xrp 10xrp 10xrp 10xrp 3 4 3 3 3 rev. d 3/03 2
application notes power supplies the input stage of the msk 1932 requires power supplies of +15v and -10.5v for optimum operation. the negative power supply can be increased to -12v if -10.5v is not available, but additional power dissipation will cause the internal temperature to rise. both low voltage power supplies should be effectively decoupled with tantalum capacitors (at least 4.7f) connected as close to the amplifier's pins as possible. the msk 1932 has internal 0.01f capacitors that also improve high frequency performance. in any case, it is also recommended to put 0.1f decoupling capacitors on the +15v and -10.5v supplies as well. the high voltage power supply (+v hv ) is connected to the amplifier's output stage and must be kept as stable as possible. the internal or external rp is connected to +v hv and as such, the amplifier's dc output is directly related to the high voltage value. the +v hv pins of the hybrid should be decoupled to ground with as large a capacitor as possible to improve output stability. supply sequencing the power supply sequence is v hv , v cc , v ee followed by the other dc control inputs. if power supply sequencing is not possible, the time difference between each supply should be less than five milliseconds. if the dc control signals are being generated from a low impedance source other than the v ref output, reverse biased diodes should be connected from each input (v gain , v off ) to the v cc pin. this will protect the inputs until v cc is turned on. video output when power is first applied and v in =v gain =v off =0v, the output will be practically at the +v hv rail voltage. the output voltage is a function of the value of rp and also the v gain and v off dc inputs. the maximum output voltage swing for any of the msk 1932 variants is determined by vpp = (250ma) x (rp). the bandwidth of the amplifier largely depends on both rp and lp. hybrid pins 12 and 13 are directly connected to rp. addi- tional external resistance can be added to reduce power dissi- pation, but slower transition times will result. if an additional resistor is used, it must be low capacitive and the layout should minimize capacitive coupling to ground (ie: no ground plane under rp). the msk 1932 series is conservatively specified with low values for lp which yield about 5% overshoot. additional peak- ing can be obtained by using a high self-resonant frequency inductor in series with pins 12 & 13. since this value of induc- tance can be very dependent on circuit layout, it is best to determine its value by experimentation. a good starting point is typically 0.47h for the msk 1932-0 and 0.0047h for the remaining devices. if external resistors or inductors are not used, be sure to connect high frequency bypass capacitors directly from pins 12 and 13 to ground for the devices that contain an internal rp. the v gain control (contrast) input is designed to allow the user to vary the video gain. by simply applying a dc voltage from 0v to v ref , the video gain can be linearly adjusted from 0 to 195v/v (msk 1932-2). the v gain input should be connected to the v ref pin through a 5k ? pot to ground. for convenient stable gain adjustment, a 0.1f bypass capacitor should be con- nected near the v gain input pin to prevent output instability due to noisy sources. digital gain control can be accomplished by connecting a d/a converter to the v gain pin. however, some temperature tracking performance may be lost when using an external dc voltage source other than v ref for gain adjustment. the bandwidth of the v gain input is approximately 1mhz. the overall video output of the msk 1932 can be character- ized using the following expression: vpp=v hv -v out v hv -v out =(v in )(v gain )(rp)(0.09) (or) voltage gain=v out /v in =(v gain )(rp)(0.09) here is a sample calculation for the msk 1932-2: given information v in =0.7v v gain =1vdc rp=400 ? (internal) v hv =100vdc v hv -v out =(0.7v)(1v)(400 ? )(0.09) v hv -v out =25.2v nominal the expected video output would swing from approximately +100v to +74.8v assuming that v off =0v. this calculation should be used as a nominal result because the overall gain may vary as much as 20% due to internal high speed device varia- tions. changing ambient conditions can also effect the video gain of the amplifier by as much as 150 ppm/c. it is wise to connect all video amplifiers to a common heat sink to maximize thermal tracking when multiple amplifiers are used in applica- tions such as rgb systems. additionally, only one of the v ref outputs should be shared by all three amplifiers. this voltage should be buffered with a suitable low drift op-amp for best tracking performance. v gain control input output protection the output pin of the msk 1932 should be protected from transients by connecting reversed biased ultra-low capacitance diodes from the output pin to both +v hv and ground. the output can also be protected from arc voltages by inserting a small value (25-50 ? ) resistor in series with the amplifier. this resistor will reduce system bandwidth along with the load ca- pacitance, but a series inductor can reduce the problem sub- stantially. video inputs the video input signals should be kept below 2v max total, including both common mode offset and signal levels. the input structure of the msk 1932 was designed for 0.714vpp rs343 signals. if either input is not used it should be con- nected directly to the analog ground or through a 25 ? resistor to ground if input offset currents are to be minimized. rev. d 3/03 3
application notes con't v off control input the brightness (output offset) can be linearly adjusted by applying a 0 to v ref dc voltage to the v off input pin. the output quiescent voltage range is from approximately (5a)(rp) to (100ma)(rp) from +v hv . this control voltage is normally generated by connecting the v off control pin to a 5k potenti- ometer between v ref and ground. the v off input pin should be bypassed with a 0.1f capacitor to ground placed as close as possible to the hybrid. this dc voltage can be any stable system source. the bandwidth of the v off pin is approximately 1mhz. keep hybrid power dissipation in mind when adjusting the output quiescent voltage. practically all of the voltage is seen across rp! this power must be taken into account when high rp currents are used. if the quiescent level is set too close to +v hv , the power dissipation will be minimal but the rise time will suffer slightly. if the quiescent level is set too far from +v hv , the power dissipation will increase dramatically and the output fall time will be limited. the output black level is obvi- ously dependent on system requirements but a little experi- mentation will strike the optimum balance between power dis- sipation and bandwidth. total current through rp should be limited to less than 290ma when operating from power sup- plies greater than 90v. the gain adjust alone can set the ac current to 250ma (ie: 250mapp=100vpp/400 ? ). typically, most applications use about 10v from +v hv for a black level. blank input the video input can be electrically disconnected from the ampliifer by applying a ttl high input to the blank pin. when this occurs, the output will be set to approximately +v hv . the v gain and v off control pins have little or no effect on the out- put when it is in blank mode. when the ttl compatible blank input is not used, the pin must be connected to ground to enable the amplifier. the blank input will float high when left unconnected which will disable the video. v ref output the msk 1932 has an on board buffered dc zener reference output. the v ref output is nominally 5.5v dc and has full temperature test limits of 5.2v to 5.8v dc. this output is provided for gain and offset adjustment and can source up to 4ma of current. thermal management the msk 1932 package has mounting holes that allow the user to connect the amplifier to a heat sink or chassis. since the package is electrically isolated from the internal circuitry, mounting insulators are not required or desired for best thermal performance. use 4 to 6 inch/pounds for mounting the device to the heat sink. the power dissipation of the amplifier depends mainly on the load requirements, bandwidth, pixel size, black level and the value of rp. the following table illustrates a few examples: 320 x 200 640 x 350 640 x 480 800 x 560 1024 x 900 1024 x 1024 1280 x 1024 1664 x 1200 2048 x 2048 4096 x 3300 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 at crt cathode 60ns 17ns 12.5ns 8.6ns 4.2ns 3.7ns 2.9ns 1.9ns 1ns 280ps required system bandwidth (f -3db ) 6mhz 20mhz 28mhz 41mhz 84mhz 95mhz 120mhz 180mhz 380mhz 1.23ghz resolution table for typical crt's all data assumes retrace time equal to 30% of frame time and a 60hz refresh rate. device type 1932-6 1932-6 1932-4 1932-4 120v 120v 70v 70v output ave. pd 0w 13.3w 0w 8.4w total ave. pd 2.5w 15.7w 2.5w 10.6w white 0% 40% 0% 40% blank 100% 20% 100% 20% output voltage 0v 90v 0v 50v white level 20v 20v 15v 15v black level 110v 110v 65v 65v +vhv black 0% 40% 0% 40% percent of signal this table does not include power dissipation due to output switching since this is dependent on individual load requirements. the input stage power dissipation is typically 2.5 watts and is essentially independent of output levels. display resolution rev. d 3/03 4
notes: the connection circuit shown above is for the msk 1932-0 evaluation board. the rp and lp are external compo- nents and must not be located near ground planes if possible. a high quality resistor such as bradford electronics p/ n fp10-400 is required for optimum response times. use an inductor with a high self-resonant frequency that can withstand the currents required for the application. when using the other variants of the msk 1932, place an additional bypass capacitor on pins 12 and 13 if series (rp and lp) components are not utilized. the pin should connect to +v hv with a short low impedance path. for additional applications information, please contact the factory. evaluation amplifiers with test boards are readily available for msk. typical connection circuit rev. d 3/03 5
mechanical specifications the information contained herein is believed to be accurate at the time of printing. msk reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. please visit our website for the most recent revision of this datasheet. m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6572 www.mskennedy.com rev. d 3/03 part number msk 1932s-0 msk 1932d-0 msk 1932u-0 msk 1932s-2 msk 1932d-2 msk 1932u-2 msk 1932s-4 msk 1932d-4 msk 1932u-4 msk 1932s-6 msk 1932d-6 msk 1932u-6 lead option straight down up straight down up straight down up straight down up +vhv max 110v 110v 75v 130v internal rp none 400 ? 200 ? 400 ? 4.0ns 3.4ns 2.3ns 6.5ns typical rise time screening level industrial industrial industrial industrial ordering information all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. torque specification 3 to 5 in/lbs. 6
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