4707 dey road liverpool, n.y. 13088 (315) 701-6751 servo amplifer motor driver typical applications msk0021 1 isc+ 2 +vcc 3 gnd 4 compensation 5 -input 6 +input 7 -vcc 8 -isc 1 pin-out information rev. b 1/07 features: available as smd #5962-8508801 high output current - 2 amps peak low power consumption-class c design programmable current limit high slew rate continuous output short circuit duration replacement for lh0021 equivalent schematic msk0021 high power op-amp m.s kennedy corp. 0021 series high power op-amp msk0021fp description: the msk 0021, 0021fp and 0021fpg are general purpose class c power operational amplifiers. these amplifiers offer large output currents, making them an excellent low cost choice for motor drive circuits. the amplifier and load can be protected from fault conditions through the use of internal current limit circuitry that can be user programmed with two external resistors. these devices are also compensated with a single external capacitor. the msk 0021 is available in a hermetically sealed 8 pin to-3 package. the msk 0021fp is packaged in a 20 pin hermetic metal flatpack and the 0021fpg is lead formed by msk. msk0021fp/msk0021fpg 20 -vcc 19 nc 18 +vin 17 nc 16 -vin 15 nc 14 compensation 13 nc 12 gnd 11 +vcc 1 isc- 2 isc- 3 isc- 4 vout 5 vout 6 vout 7 vout 8 isc+ 9 isc+ 10 isc+ case-output case is also vout audio amplifier programmable power supply msk0021fpg mil-prf-38534 qualified
group a subgroup - 1, 2, 3 1,2,3 1 2, 3 1 2, 3 1 2,3 - - 4 5,6 1 2,3 - 4 5,6 4 4 4 - 4 4 5,6 4 4 static supply voltage range quiescent current power consumption input input capacitance input resistance input noise voltage output settling time transfer characteristics slew rate transition times overshoot max. 1 8 4.0 120 5.0 - 5 00 - 300 - - - - - - - - - - - 1.7 250 - - - - 1.2 20 typ. 1 5 1 . 0 90 0.5 - 150 - 2.0 - 3 1.0 90 - 95 - 5 14 - 12 1.2 150 4 3.0 105 - 0.3 5 min. 12 - - - - - - - - - 0.3 70 - 80 - - 13.0 - 10.5 0.7 50 - 1.2 100 - - - max. 1 8 3. 5 105 3 .0 5.0 300 1. 0 100 300 - - - - - - - - - - 1.6 250 - - - - 1.0 20 typ. 1 5 1.0 75 0.5 2.0 100 0.4 2.0 - 3 1.0 90 90 95 - 5 14 14 12 1.2 150 4 3.0 105 96 0.3 5 min. 12 - - - - - - - - - 0.3 70 70 80 80 - 13.5 13.5 11 0.8 50 - 1.5 100 88 - - v in = 0v v cm = 0v either input f=dc f=dc f = 10h z to 10kh z r l =10 w f =100h z r sc = 0.5 w v out = max r sc = 5 w v out = gnd 0.1% 2v step v out = 10v r l = 100 w rise and fall small signal v cc supply voltage 18v i out peak output current 2a v in differential input voltage 30v v in common mode input voltage 15v r th thermal resistance-junction to case msk 0021 2.0 c/w msk 0021fp/fpg 6.0 c/w absolute maximum ratings electrical specifications t st storage temperature range -65 to +150c t ld lead temperature range 300c (10 seconds) p d power dissipation (to-3) 6w t j junction temperature 150c t c case operating temperature range military versions (h/b/e) -55c to +125c industrial versions -40c to +85c units v ma mw mv v/c na a na na pf m w db db db db v rms v v v a ma s v/s db db s % 2 rev. b 1/07 military industrial 2 input bias current output voltage swing r l =100 w f =100h z parameter test conditions 4 input offset current input offset voltage power supply rejection ratio v cm = 0v f = 10h z v cm = 10v output short circuit current common mode rejection ratio v cc = 5v to 15v open loop voltage gain notes: unless otherwise specified, v cc = 15v, c c = 3000pf. guaranteed by design but not tested. typical parameters are representative of actual device performance but are for reference only. industrial grade and "e" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices (b/h 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 reference dscc smd 5962-8508801 for electrical specifications for devices purchased as such. subgroup 5 and 6 testing available upon request. continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. 3 2 3 5 2 v in = 0v 3 f = 10h z r l = 1k w v in = 0v 1 2 3 4 5 6 7 8 8
heat sinking to select the correct heat sink for your application, refer to the thermal model and governing equation below. thermal model: application notes current limit the msk 0021 has an on-board current limit scheme de- signed to limit the output drivers anytime output current exceeds a predetermined limit. the following formula may be used to determine the value of the current limit resistance necessary to establish the desired current limit. current limit connection 3 rev. b 1/07 r sc = 0.7 i sc ___ see "application circuits" in this data sheet for additional information on current limit connections. power supply bypassing both the negative and the positive power supplies must be effectively decoupled with a high and low frequency by- pass circuit to avoid power supply induced oscillation. an effective decoupling scheme consists of a 0.1 microfarad ceramic capacitor in parallel with a 4.7 microfarad tantalum capacitor from each power supply pin to ground. it is also a good practice with high power op-amps, such as the msk 0021, to place a 30-50 microfarad capacitor with a low effective series resistance, in parallel with the other two power supply decoupling capacitors. this capacitor will eliminate any peak output voltage clipping which may occur due to poor power supply load regulation. all power supply decoupling capacitors should be placed as close to the pack- age power supply pins as possible. safe operating area the safe operating area curve is a graphical representation of the power handling capability of the amplifier under vari- ous conditions. the wire bond current carrying capability, transistor junction temperature and secondary breakdown limitations are all incorporated into the safe operating area curves. all applications should be checked against the s.o.a. curves to ensure high m.t.b.f. governing equation: t j = p d x (r q jc + r q cs + r q sa ) + t a where t j = junction temperature p d = total power dissipation r q jc = junction to case thermal resistance r q cs = case to heat sink thermal resistance r q sa = heat sink to ambient thermal resistance t c = case temperature t a = ambient temperature t s = sink temperature example: (to-3 package) in our example the amplifier application requires the output to drive a 10 volt peak sine wave across a 10 ohm load for 1 amp of output current. for a worst case analysis we will treat the 1 amp peak output current as a d.c. output current. the power supplies are 15 vdc. 1.) find power dissipation p d =[(quiescent current) x (+v cc - (v cc ))] + [(v s - v o ) x i out ] =(3.5 ma) x (30v) + (5v) x (1a) =0.1w + 6w =6.1w 2.) for conservative design, set t j = +150c. 3.) for this example, worst case t a = +25c. 4.) r q jc = 2.0c/w typically for the to-3 package. 5.) rearrange governing equation to solve for r q sa: r q sa =(t j - t a ) / p d - (r q jc ) - (r q cs ) = (150c - 25c) / 6.1w - ( 2.0c/w) - (0.15c/w) = 18.5c/w the heat sink in this example must have a thermal resistance of no more than 18.5c/w to maintain a junction temperature of less than +150c.
4 rev. b 1/07 application circuits
typical performance curves 5 rev. b 1/07
6 rev. b 1/07 ordering information mechanical specifications note: all dimensions are 0.010 inches unless otherwise labeled msk0021 part number msk 0021 e msk 0021 msk 0021 b 5962-8508801x screening level industrial mil-prf-38534 class h extended reliability dscc - smd weight=14 grams typical
7 rev. b 1/07 mechanical specifications continued note: all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. msk0021fp ordering information part number msk 0021fp e msk 0021fp msk 0021fp h screening level industrial mil-prf-38534 class h extended reliability dscc - smd tbd weight=4 grams typical
8 rev. b 1/07 m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com 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 mechanical specifications continued note: all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. msk0021fpg ordering information part number msk 0021fpg e msk 0021fpg msk 0021fpg h screening level industrial mil-prf-38534 class h extended reliability dscc - smd tbd weight=3.8 grams typical
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