fast buffer lh0033 / lh0033c features slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500v/ m s wide range single or dual supply operation bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mhz high output drive . . . . . . . . . . . . . . . 10v with 50 w load low phase non-linearity . . . . . . . . . . . . . . . . 2 degrees rise times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ns high input resistance:. . . . . . . . . . . . . . . . . . . . . . . 10 10 w high output current (peak) . . . . . . . . . . . . . . . . . 250ma applications coaxial cable driver fast op amp booster flash converter driver video line driver high speed sample and hold ate pin driver video amplifier radar sonar boost op amp output isolate capacitance load general description the lh0033 is a high speed, fet input, voltage follower/buffer designed to provide high current drive (up to 100ma) at frequencies from dc to over 100mhz. the lh0033 slews at 1500v/ m s and exhibits excellent phase linearity up to 20mhz. lh0033 is intended to fulfill a wide range of buffer applications such as high speed line drivers, video impedance transformation, nuclear instrumentation amplifiers, op amp isolation buffers for driving reactive loads and high impedance input buffers for high speed a to ds and comparators. in addition, the lh0033 can continuously drive 50 w coaxial cables or be used as a yoke driver for high resolution crt displays. this device is const ructed using specially selected junction fets and active laser trimming to achieve guaranteed performance specificat ions. the lh0033 is specified for operation from -55 o c to +125 o c and the lh0033c is specified from -25 o c to 85 o c. the lh0033 is available in a 2.2w metal to-8 package. ordering information part package temperature range lh0033g h12a (to8 12 lead) -55 o c to 125 o c lh0033cg h12a (to8 12 lead) -25 o c to 85 o c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a 1 2 3 4 5 6 789 10 11 12 output input nc lh0033 metal can package offset preset offset adjust nc nc nc c v + c v v - v + case is electrically isolated top view package h12a connection diagram
absolute maximum ratings if military/aeros pace specified devices are required, please contact calogic sales office for availability and specifications. supply voltage (v + - v - ). . . . . . . . . . . . . . . . . . . . . . . . . . . 40v power dissipation (see curves) lh0033/lh0033c . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2w junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175 o c input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v supply continuous output current lh0033/lh0033c . . . . . . . . . . . . . . . . . . . . . . . . . 100ma peak output current lh0033/lh0033c . . . . . . . . . . . . . . . . . . . . . . . . . 250ma lead temp. (soldering, 10 seconds). . . . . . . . . . . . . . . 300 o c operating temperature range lh0033. . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 o c to +125 o c lh0033c . . . . . . . . . . . . . . . . . . . . . . . . . . . -25 o c to +85 o c storage temperature range . . . . . . . . . . -65 o c to +150 o c lh0033 / lh0033c llc symbol characteristics lh0033 lh0033c units conditions min typ max min typ max v os output offset voltage 5.0 10 15 12 20 25 mv mv r s = 100 w , t j = 25 o c, v in = 0v (note 2), r s = 100 w d v os d t average temperature coefficient of offset voltage 50 100 50 100 m v/ o cr s = 100 w , v in = 0v (note 3) i b input bias current 250 2.5 10 500 5.0 20 pa na na v in = 0v t j = 25 o c (note 2) t a = 25 o c (note 4) t j = t a = t max a v voltage gain 0.97 0.98 1.00 0.96 0.98 1.00 v/v v o = 10v, r s = 100 w , r l = 1.0k w r in input impedance 10 10 10 11 10 10 10 11 w r l = 1k w r out output impedance 6.0 10 6.0 10 w v in = 1.0v, r l = 1.0k v (swing 1) output voltage swing 12 12 v v i = 14v, r l = 1.0k v (swing 2) 9.0 9.0 v i = 10.5v, r l = 100 w , t a = 25 o c i s supply current 18 22 18 24 ma v in = 0v (note 5) p d power consumption 540 660 540 720 mw v in = 0v dc electrical characteristics: the following specifications apply for supply voltage = 15v unless otherwise noted (note 1) ac electrical characteristics: t j = 25 o c, v s = 15v, r s = 50 w , r l = 1.0k w (note 3) symbol characteristics lh0033 lh0033c units conditions min typ max min typ max s r slew rate 1000 1500 1000 1400 v/ m sv in = 10v bw bandwidth 100 100 mhz v in = 1.0vrms phase non- linearity 2.0 2.0 degrees bw = 1.0hz to 20mhz r t rise time 2.9 3.2 ns d v in = 0.5v propagation delay 1.2 1.5 ns d v in = 0.5v harmonic distortion <0.1 <0.1 % f>1khz note 1: lh0033 is 100% production tested as specified at 25 o c. specifications at temperature extremes are verified by sample testing, correlation or periodic characterization. note 2: specification is at 25 o c junction temperature due to requirements of high speed automatic testing. actual values at operating temperature will exceed the value at t j = 25 o c. when supply voltages are 15v, no-load operating junction temperature may rise 40-60 o c above ambient, and more under load conditions. accordingly, v os may change one to several mv, and i b will change significantly during warm-up. note 3: limits are guaranteed by sample testing, periodic characterization or correlation. note 4: measured in still air 7 minutes after application of power. guaranteed through correlated automatic pulse testing. note 5: guaranteed through correlated automatic pulse testing at t j = 25 o c. calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a typical performance characteristics time (ns) input/output voltage (v) 6 030 2 10 20 positive pulse response 4 0 8 40 50 60 12 10 input output t c = +25c r l = 1k w ,r s = 50 w v s = 15v temperature (c) power dissipation (w) 0.5 075 25 50 power dissipation 0 100 125 150 2.0 1.5 1.0 ambient ja q = 100c/w case jc q = 60c/w supply voltage (v) output voltage (v) 18 10 5 6 10 output voltage vs supply voltage 14 15 20 12 8 4 16 r l = 1k w r s = 100k w t c = +25c frequency (mhz) voltage gain (v/v) 0.8 1.0 10.0 0.4 2.0 5.0 frequency response 0.6 0.2 1.0 5 phase lag (degrees) 20.0 50 100 25 30 20 10 15 40 35 av f v in = 1.0 vrms r l = 1k w r s = 50 w v s = 15v supply voltage (v) supply current (ma) 21 19 5 18 10 supply current vs supply voltage 17 20 15 20 t c = +125c t c = +25c t c = -55c time (ns) input/output voltage (-v) -6 0 -10 10 negative pulse response -2 30 60 0 -8 -12 -4 input output t c = +25c r l = 1k w r s = 50 w v s = 15v 20 50 40
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a typical performance characteristics (continued) temperature (c) rise and fall time (ns) 8.0 4.0 -50 2.0 rise and fall time vs temperature 6.0 150 0 0 50 100 t r r l = 1k r s = 50 w v s = 15v t f time from power turn-on (minutes) current - normalized to current at time = 0 100 06 24 normalized input bias current during warm-up 1 810 10 t a v s = 15v = 25c temperature (c) input bias current (na) 10 050 25 input bias current vs temperature 1 0.001 75 100 125 0.100 0.010 v s = 10v v s = 15v v s = 5v input voltage (v) input bias current (na) 10 4 86 input bias current vs input voltage 20-2 10 1.0 0.1 -6 -10 pulse tested (t j v s = 15v = 25c)
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a application information: recommended layout precautions rf/video printed circuit board layout rules should be followed when using the lh0033 since it will provide power gain to frequencies over 100mhz. ground planes are recommended and power supplies should be decoupled at each device with low inductance capacitors. in addition, ground plane shielding may be extended to the metal case of the device since it is electrically isolated from internal circuitry. alternatively the case should be connected to the output to minimize input capacitance. offset voltage adjustment the lh0033?s offset voltages have been actively trimmed by laser to meet guaranteed specifications when the offset preset pin is shorted to the offset adjust pin. if offset null is desirable, it is simply obtained by leaving the offset preset pin open and connecting a trim pot of 200 w for the lh0033 between the offset adjust pin and v ? , as illustrated in figure 1. operation from single or asymmetrical power supplies lh0033 may be used in applications where symmetr ical supplies are unavai lable or not desirable. a typical application might be an interface to a mos shift register where v + = +5v and v ? = -12v. in this case, an apparent output offset occurs due to the device?s voltage gain of less than unity. this additional output error may be predicted by: d v o @ ( 1 - a v ) ( v + - v - ) 2 = 0.005 ( v + - v - ) where: a v = no load voltage gain, typically 0.99 v + = positive supply voltage v ? = negative supply voltage for the above example, d v o would be -35mv. this may be adjusted to zero as described in figure 1. for ac coupled applications, no additional of fset occurs if the dc input is properly biased as illustrated in the typical applications section. short circuit protection in order to optimize transient response and output swing, output current limit has been omitted from the lh0033. short circuit protection may be added by inserting appropriate value resistors between v + and v c + pins and v ? and v c ? pins as illustrated in figure 2. resistor values may be predicted by: r lim @ v + i sc = v - i sc where: i sc 100ma for lh0033 the inclusion of limiting resistors in the collectors of the output transist ors reduces output voltage swing. decoupling vc + and v c ? pins with capacitors to ground will retain full output swing for transient pulses. alternate active current limit techniques that retain full dc output swing are shown in figure 2. resistor current limiting using resistor 10 7 6 input 11 9 12 5 1 r lim 100 output r lim 100 c @ 0.1 m f c @ 0.1 m f lh0033 v + v - figure 1. offset zero adjust 200 w 9 11 1 6 +15v 5 7 input offset preset (open) offset adjust output -15v 10 lh0033 12
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a figure 3. in figure 3, the current sources are saturated during normal operation, thus apply full supply voltage to the v c pins. under fault conditions, the voltage decreases as required by the overload. for figure 5: r lim = v be i sc = 0.6v 60ma = 10 w capacitive loading the lh0033 is designed to drive capacitive loads such as coaxial cables in excess of several thousand picofarads without susceptibility to oscillation. however, peak current resulting from (c d v /d t ) should be limited below absolute maximum peak current ratings for the devices. thus for the lh0033: ( d v in d t ) c l i out 250ma in addition, power dissipation resulting from driving capacitive loads plus standby power should be kept below total package power rating: p d pkg. 3 p dc + p ac p d pkg. 3 (v + ?v ? ) i s + p ac p ac @ (vp-p) 2 f c l where: vp-p = peak-to-peak output voltage swing f = frequency c l = load capacitance operation within an op amp loop lh0033 may be used as a current booster or isolator buffer within a closed loop with op amps such as lh0032, or clm4124. an isolation resistor of 47 w should be used between the op amp output and the input of lh0033. the wide bandwidth and high slew rate of the lh0033 assure that the loop has the characteristics of the op amp and that additional rolloff is not required. hardware in order to utilize the full drive capabilities of l h0033, it should be mounted with a heat sink particulary for extended temperature operation. the case is isolated from the circuit and may be connected to the system chassis. design precaution power supply bypassing is necessary to prevent oscillation. low inductance ceramic disc capacitors with the shortest practical lead lengths must be connected from each supply lead (within < 1 4 " to 1 2 " of the device package) to a ground plane. capacitors should be one or two 0.1 m f in parallel; adding a 4.7 m f solid tantalum capacitor will help troublsome instances. figure 3. current limiting using current sources 7 6 input 11 5 1 output q2 10 12 r lim 10 r lim 10 q1 q3 q4 -15v +15v 0.01 m f q1 = q2 = 2n2905 q3 = q4 = 2n2219 lh0033 9 30k
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a coaxial cable driver 10 6 7 43 c1* 100 input 51 11 9 12 5 *select c1 for optimum pulse response 50 w 100 1 lh0033 v + v - high input impedance ac coupled amplifier case 10 7 6 input 4.7pf 11 9 12 5 0.1 m f 0.1 m f v - 1m f h 3 100mhz lh0033 v + 0.001 m f output typical applications
lh0033 / lh0033c llc 4.5mhz notch filter 10 7 6 11 9 12 5 1 r1 220 w c1 150pf r1 220 w c2 300pf r2 110 w v in c1 150pf v + v - lh0033 1 f 0 = 2 p r 1 c 1 r 1 = 2r 2 c 1 = c 2 2 single supply ac amplifier case 10 7 6 input 11 9 12 5 1m output cc v = 12.0v 0.001 m f lh0033 1 calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a instrumentation shield/line driver 10 7 6 100 input 51 9 12 5 1 case 11 100 lh0033 v - v + high input impedance comparator with offset adjust + - + - 10 11 9 12 1 5 lh0033 lm711 5 3 4 7 6 10 offset adjust 7 input no go = logic "1" go = logic "0" v l.l. v + v + v - v - v u.l. typical applications (continued)
lh0033 / lh0033c llc calogic llc , 237 whitney place, fremont, california 94539, telephone: 51 0-656-29 00, fax: 510-65 1-1076 ds048 rev a high speed sample and hold 10 6 7 11 9 12 v - lh0033 5 10 6 7 100 analog input 9 7 5 v - 1 11 100 100 c1* 1000pf 1 output logic input 1 2 lh0033 *polycarbonate or teflon tm v + v + typical applications (continued)
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