4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 features: ultra low quiescent current - 15ma for high voltage 220v peak to peak output voltage swing slew rate - 3000v/ s typical gain bandwidth product - 200 mhz typical full power output frequency - 1 mhz typical output current - 200ma peak adjustable v hv power supplies minimizes power dissipation compact package offers superior power dissipation contact msk for mil-prf-38534 qualification status. wide bandwidth high voltage amplifier 601 +vhv +vsc output case/ground -vsc -vhv 1 2 3 4 5 6 12 11 10 9 8 7 comp +vcc ground -vcc -input no connection wideband very high voltage amplifier high resolution crt monitor ultra high performance video processing crt beam intensity control varactor tuned vco driver automatic test equipment pin-out information typical applications the msk 601(b) is a high voltage wideband amplifier designed to provide very large voltage swings at high slew rates in wideband systems. the true inverting op-amp topology employed in the msk 601 provides excellent d.c. specifications such as input offset voltage and input bias current. these attributes are important in amplifiers that will be used in high gain configurations since the input error voltages will be multiplied by the system gain. the msk 601 achieves impressive slew rate specifications by employing a feed forward a.c. path through the amplifier; however, the device is internally configured in inverting mode to utilize this benefit. internal compensation for gains of -5v/v or greater keeps the msk 601 stable in this range. the msk 601 is packaged in a space efficient, hermetically sealed, 12 pin power dual in line package that has a high thermal conductivity for efficient device cooling. description: equivalent schematic mil-prf-38534 certified facility rev. b 9/11 1
static input offset voltage drift dynamic characteristics output voltage swing peak output current full power output unity gain bandwidth slew rate voltage gain settling time to 1% settling time to 0.1% group a subgroup 1,2,3 1,2,3 1,2,3 1,2,3 1 2,3 1 2,3 2,3 - - 4 - - - 4 4 - - 150v dc v cc 18v dc 18c/w -65c to +150c 300c -40c to +85c -55c to +125c 150c absolute maximum ratings t st t ld t c t j storage temperature range lead temperature range (10 seconds) case operating temperature msk601 msk601b junction temperature supply voltage input voltage range supply voltage (input stage) thermal resistance @ t c =25c (output devices) v hv v in v cc jc typ. 1.5 15 20 20 1.0 2.0 50 100 10 15 120 115 250 2 70 3000 95 250 1200 min. - - - - - - - - - 12 50 110 200 1 50 2000 90 - - max. 2.0 25 30 30 5.0 10.0 250 350 50 18 150 - - - - - - - - min. - - - - - - - - - 12 50 110 200 1 50 1500 90 - - max. 2.5 30 35 35 10 - 500 - - 18 150 - - - - - - - - msk 601b msk 601 parameter test conditions electrical specifications 1 ma ma ma ma mv mv na na v/c v v v ma mhz mhz v/ s db ns ns units typ. 1.8 20 25 25 1.0 2.0 50 100 10 15 120 115 250 2 70 3000 95 250 1200 1 2 3 4 5 unless otherwise specified, v cc =15v dc , v hv =120v dc , c l =8pf (probe capacitance) and a v =-10v/v. this parameter is guaranteed by design but not tested. typical parameters are representative of actual device performance but are for reference only. industrial grade devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices ('b' suffix) shall be 100% tested to subgroups 1,2,3 and 4. subgroup 1,4 t a =t c =+25c subgroup 2,5 t a =t c =+125c subgroup 3,6 t a =t c =-55c notes: quiescent current input offset voltage input bias current v in =0 v in =0 @ +v cc v in =0 @ -v cc v in =0 @ +v hv v in =0 @ -v hv v in =0 v cc v hv f=1khz f=1khz v 0 =100v v 0 =1.0v v 0 =90v f=1khz a v =-10v/v a v =-10v/v power supply range 2 2 2 2 2 2 2 rev. b 9/11 2
application notes the msk 601 employs a circuit topology known as "feed forward". this inverting configuration allows the user to real- ize the excellent d.c. input characteristics of a differential am- plifier without losing system bandwidth. the incoming sig- nal is split at the input into its a.c. and d.c. component. the d.c. component is allowed to run through the differential amplifier where any common mode noise is rejected. the a.c. component is "fed forward" to the output section through a very high speed linear amplifier where it is mixed back to- gether with the d.c. component. the result is an amplifier with most of the benefits of a differential amplifier without the loss in system bandwidth. feed forward topology figure 2 high voltage supplies the positive and negative high voltage supplies on the msk 601 can be adjusted to reduce power dissipation. the out- put of the msk 601 will typically swing to within 8v of either high voltage power supply rail. therefore, if the sys- tem in question only needs the output of the amplifier to swing 40v peak, the power supply rails could be set to 50v. for best performance, the minimum value of v hv should be 50v dc . unbalanced power supply rails are also allowed as long as one or the other is not decreased to below 30v or above 150v. the high voltage and low voltage power sup- plies should be decoupled as shown in figure 1. transition time optimization of the msk 601 follows the same basic rules as most any other amplifier. best transition times will be realized with minumum load capacitance, mini- mum external feedback resistance and lowest circuit gain. transition times will degrade if the output is driven too close to either supply rail. feedback and input resistor values will affect transition time as well. see figure 1 and table 1 for recommended component values. transition times 1k 499 402 -r in -10v/v -20v/v -50v/v c f 0.5-5pf n/a n/a 10k 10k 20k voltage gain r f table 1 figure 1 internal compensation since the msk 601 is a high voltage amplifier, it is com- monly used in circuits employing large gains. therefore, the internal compensation was chosen for gains of -5v/v or greater. in circuits running at gains of less than -5v/v, the user can further compensate the device by adding compensation net- works at the input or feedback node. pin 1 (comp) should be bypassed with a 0.1uf ceramic capacitor to +v hv for all ap- plications. figure 2 is the recommended active short circuit protection scheme for the msk 601. the following formula may be used for setting current limit: current limit 0.6v / rsc r base must be selected based on the value of v hv as fol- lows: r base = ((+v hv - (-v hv )) - 1.2v) / 4ma this formula guarantees that q2 and q4 will always have sufficient base current to be in operation. this circuit can be made tolerant of high frequency output current spikes with the addition of c sc . the corresponding time constant would be: t = (r sc ) (c sc ) a common value for c sc is approximately 1000pf. if current limit is unnecessary, short pin 7 to pin 8 and pin 11 to pin 12 as shown in figure 1. current limit rev. b 9/11 3
ordering information screening level msk601 industrial 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. contact msk for mil-prf-38534 qualification status. mechanical specifications m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com msk601b all dimensions are 0.010 inches unless otherwise labeled part number rev. b 9/11 note: esd triangle indicates pin 1. military-mil-prf-38534 msk601 4
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