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note : all information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publi cation; however, this data sheet cannot be a ?controlled document?. current revisions, if any, to these specifications are maintained at the factory and are available upon your request. we recommend checking the revision level befor e finalization of your design documentation. ? 2001 elantec semiconductor, inc. e l 2 0 4 4 c general description the EL2044c is a high speed, low power, low cost monolithic opera- tional amplifier built on elantec's proprietary complementary bipolar process. the EL2044c is unity-gain stable and features a 325v/s slew rate and 120mhz gain-bandwidth product while requiring only 5.2 ma of supply current. the power supply operating range of the EL2044c is from 18v down to as little as 2v. for single-supply operation, the EL2044c operates from 36v down to as little as 2.5v. the excellent power sup- ply operating range of the EL2044c makes it an obvious choice for applications on a single +5v supply. the EL2044c also features an extremely wide output voltage swing of 13.6v with v s = 15v and r l = 1000 w . at 5v, output voltage swing is a wide 3.8v with r l = 500 w and 3.2v with r l = 150 w . furthermore, for single-supply operation at +5v, output voltage swing is an excellent 0.3v to 3.8v with r l = 500 w . at a gain of +1, the EL2044c has a -3db bandwidth of 120mhz with a phase margin of 50. it can drive unlimited load capacitance, and because of its conventional voltage-feedback topology, the EL2044c allows the use of reactive or non-linear elements in its feedback net- work. this versatility combined with low cost and 75ma of output- current drive makes the EL2044c an ideal choice for price-sensitive applications requiring low power and high speed. connection diagram dip and so package features ? 120mhz -3db bandwidth ? unity-gain stable ? low supply current = 5.2ma at v s = 15v ? wide supply range = 2v to 18v dual-supply = 2.5v to 36v single-supply ? high slew rate = 325v/s ? fast settling = 80ns to 0.1% for a 10v step ? low differential gain = 0.04% at a v =+2, r l = 150 w ? low differential phase = 0.15 at a v = +2, r l = 150 w ? stable with unlimited capacitive load ? wide output voltage swing = 13.6v with v s = 15v, r l = 1000 w = 3.8v/0.3v with v s = +5v, r l = 500 w ? low cost, enhanced replacement for the ad847 and lm6361 applications ? video amplifier ? single-supply amplifier ? active filters/integrators ? high-speed sample-and-hold ? high-speed signal processing ? adc/dac buffer ? pulse/rf amplifier ? pin diode receiver ? log amplifier ? photo multiplier amplifier ? difference amplifier ordering information part no. temp. range package outline # EL2044cn -40c to +85c 8-pin p-dip mdp0031 EL2044cs -40c to +85c 8-lead so mdp0027 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier s e p t e m b e r 2 6 , 2 0 0 1
2 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c absolute maximum ratings (t a = 25c) supply voltage (v s ) 18v or 36v peak output current (i op ) short-circuit protected output short-circuit duration infinite (a heat-sink is required to keep junction temperature below absolute maximum when an output is shorted.) input voltage (v in) v s differential input voltage (dv in ) 10v power dissipation (p d ) see curves operating temperature range (t a ) -40c to +85c operating junction temperature (t j ) 150c storage temperature (t st ) -65c to +150c important note: all parameters having min/max specifications are guaranteed. typ values are for information purposes only. unless otherwise note d, all tests are at the specified temperature and are pulsed tests, therefore: t j = t c = t a . dc electrical characteristics v s = 15v, r l = 1000 w , unless otherwise specified parameter description condition temp min typ max unit v os input offset voltage v s = 15v 25c 0.5 7.0 mv t min , t max 13.0 mv tcv os average offset (note 2) all 10.0 v/c voltage drift i b input bias current v s = 15v 25c 2.8 8.2 a t min , t max 11.2 a v s = 5v 25c 2.8 a i os input offset current v s = 15v 25c 50 300 na t min , t max 500 na v s = 5v 25c 50 na tci os average offset current drift [1] all 0.3 na/c a vol open-loop gain v s = 15v,v out = 10v, r l = 1000 w 25c 800 1500 v/v t min , t max 600 v/v v s = 5v, v out = 2.5v, r l = 500 w 25c 1200 v/v v s = 5v, v out = 2.5v, r l = 150 w 25c 1000 v/v psrr power supply rejection ratio v s = 5v to 15v 25c 65 80 db t min , t max 60 db cmrr common-mode rejection ratio v cm = 12v, v out = 0v 25c 70 90 db t min , t max 70 db cmir common-mode input range v s = 15v 25c 14.0 v v s = 5v 25c 4.2 v v s = +5v 25c 4.2/0.1 v v out output voltage swing v s = 15v, r l = 1000 w 25c 13.4 13.6 v t min , t max 13.1 v v s = 15v, r l = 500 w 25c 12.0 13.4 v v s = 5v, r l = 500 w 25c 3.4 3.8 v v s = 5v, r l = 150 w 25c 3.2 v v s = +5v, r l = 500 w 25c 3.6/0.4 3.8/0.3 v t min , t max 3.5/0.5 v i sc output short circuit current 25c 40 75 ma t min , t max 35 ma
3 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c i s supply current v s = 15v, no load 25c 5.2 7 ma t min , t max 7.6 ma v s = 5v, no load 25c 5.0 ma r in input resistance differential 25c 150 k w common-mode 25c 15 m w c in input capacitance a v = +1@ 10mhz 25c 1.0 pf r out output resistance a v = +1 25c 50 m w psor power-supply operating range dual-supply 25c 2.0 18.0 v single-supply 25c 2.5 36.0 v 1. measured from t min to t max . dc electrical characteristics (continued) v s = 15v, r l = 1000 w , unless otherwise specified parameter description condition temp min typ max unit
4 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c closed-loop ac electrical characteristics v s = 15v, a v = +1, r l = 1000? unless otherwise specified parameter description condition temp min typ max unit bw -3 db bandwidth (v out = 0.4 v pp ) v s = 15v, a v = +1 25c 120 mhz v s = 15v, a v = -1 25c 60 mhz v s = 15v, a v = +2 25c 60 mhz v s = 15v, a v = +5 25c 12 mhz v s = 15v, a v = +10 25c 6 mhz v s = 5v, a v = +1 25c 80 mhz gbwp gain-bandwidth product v s = 15v 25c 60 mhz v s = 5v 25c 45 mhz pm phase margin r l = 1 k w , c l = 10 pf 25c 50 sr slew rate [1] v s = 15v, r l = 1000 w 25c 250 325 v/s v s = 5v, r l = 500 w 25c 200 v/s fpbw full-power bandwidth [2] v s = 15v 25c 4.0 5.2 mhz v s = 5v 25c 12.7 mhz t r , t f rise time, fall time 0.1v step 25c 3.0 ns os overshoot 0.1v step 25c 20 % t pd propagation delay 25c 2.5 ns t s settling to +0.1% (a v = +1) v s = 15v, 10v step 25c 80 ns v s = 5v, 5v step 60 ns dg differential gain [3] ntsc/pal 25c 0.04 % dp differential phase (note 5) ntsc/pal 25c 0.15 en input noise voltage 10khz 25c 15.0 nv/ ? hz in input noise current 10khz 25c 1.50 pa/ ? hz ci stab load capacitance stability a v = +1 25c infinite pf 1. slew rate is measured on rising edge. 2. for v s = 15v, v out = 20v pp . for v s = 5v, v out = 5v pp . full-power bandwidth is based on slew rate measurement using: fpbw = sr/(2 p * vpeak). 3. video performance measured at v s = 15v, a v = +2 with 2 times normal video level across r l = 150 w . this corresponds to standard video levels across a back-terminated 75 w load. for other values of r l , see curves.
5 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c typical performance curves non-inverting frequency response inverting frequency response frequency response for various load resistances equivalent input noise settling time vs output voltage change output voltage range vs supply voltage common-mode input range vs supply voltage supply current vs supply voltage cmrr, psrr and closed-loop output resistance vs frequency open-loop gain and phase vs frequency output voltage swing vs frequency 2nd and 3rd harmonic distortion vs frequency
6 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c gain-bandwidth product vs supply voltage open-loop gain vs supply voltage slew-rate vs supply voltage voltage swing vs load resistance open-loop gain vs load resistance bias and offset current vs input common-mode voltage offset voltage vs temperature bias and offset current vs temperature supply current vs temperature open-loop gain psrr and cmrr vs temperature slew rate vs temperature gain-bandwidth product vs temperature
7 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c short-circuit current vs temperature gain-bandwidth product vs load capacitance overshoot vs load capacitance small-signal step response short-circuit current large-signal differential gain and phase vs dc input offset at 3.58mhz differential gain and phase vs dc input offset at 4.43mhz differential gain and phase vs number of 150 w loads at 3.58mhz 8-lead so maximum power dissipation vs ambient temperature 8-pin plastic dip maximum power dissipation vs ambient temperature differential gain and phase vs number of 150 w loads at 4.43mhz
8 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c simplified schematic burn-in circuit all packages use the same schematic
9 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c applications information product description the EL2044c is a low-power wideband monolithic operational amplifier built on elantec's proprietary high- speed complementary bipolar process. the EL2044c uses a classical voltage-feedback topology which allows it to be used in a variety of applications where current- feedback amplifiers are not appropriate because of restrictions placed upon the feedback element used with the amplifier. the conventional topology of the EL2044c allows, for example, a capacitor to be placed in the feedback path, making it an excellent choice for applications such as active filters, sample-and-holds, or integrators. similarly, because of the ability to use diodes in the feedback network, the EL2044c is an excellent choice for applications such as fast log amplifiers. single-supply operation the EL2044c has been designed to have a wide input and output voltage range. this design also makes the EL2044c an excellent choice for single-supply opera- tion. using a single positive supply, the lower input voltage range is within 100mv of ground (r l = 500 w ), and the lower output voltage range is within 300mv of ground. upper input voltage range reaches 4.2v, and output voltage range reaches 3.8v with a 5v supply and r l = 500 w . this results in a 3.5v output swing on a sin- gle 5v supply. this wide output voltage range also allows single-supply operation with a supply voltage as high as 36v or as low as 2.5v. on a single 2.5v supply, the EL2044c still has 1v of output swing. gain-bandwidth product and the -3db bandwidth the EL2044c has a gain-bandwidth product of 60mhz while using only 5.2ma of supply current. for gains greater than 4, its closed-loop -3db bandwidth is approximately equal to the gain-bandwidth product divided by the noise gain of the circuit. for gains less than 4, higher-order poles in the amplifier's transfer function contribute to even higher closed loop band- widths. for example, the EL2044c has a -3db bandwidth of 120mhz at a gain of +1, dropping to 60mhz at a gain of +2. it is important to note that the EL2044c has been designed so that this ?extra? band- width in low-gain applications does not come at the expense of stability. as seen in the typical performance curves, the EL2044c in a gain of +1 only exhibits 1.0db of peaking with a 1000 w load. video performance an industry-standard method of measuring the video distortion of a component such as the EL2044c is to measure the amount of differential gain (dg) and differ- ential phase (dp) that it introduces. to make these measurements, a 0.286v pp (40 ire) signal is applied to the device with 0v dc offset (0 ire) at either 3.58mhz for ntsc or 4.43mhz for pal. a second measurement is then made at 0.714v dc offset (100 ire). differential gain is a measure of the change in amplitude of the sine wave, and is measured in percent. differential phase is a measure of the change in phase, and is measured in degrees. for signal transmission and distribution, a back-termi- nated cable (75 w in series at the drive end, and 75 w to ground at the receiving end) is preferred since the impedance match at both ends will absorb any reflec- tions. however, when double termination is used, the received signal is halved; therefore a gain of 2 configu- ration is typically used to compensate for the attenuation. the EL2044c has been designed as an economical solu- tion for applications requiring low video distortion. it has been thoroughly characterized for video perfor- mance in the topology described above, and the results have been included as typical dg and dp specifications and as typical performance curves. in a gain of +2, driv- ing 150?, with standard video test levels at the input, the EL2044c exhibits dg and dp of only 0.04% and 0.15 at ntsc and pal. because dg and dp can vary with dif- ferent dc offsets, the video performance of the EL2044c has been characterized over the entire dc off- set range from -0.714v to +0.714v. for more information, refer to the curves of dg and dp vs dc input offset.
10 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c the output drive capability of the EL2044c allows it to drive up to 2 back-terminated loads with good video per- formance. for more demanding applications such as greater output drive or better video distortion, a number of alternatives such as the el2120c, el400c, or el2073c should be considered. output drive capability the EL2044c has been designed to drive low imped- ance loads. it can easily drive 6v pp into a 150 w load. this high output drive capability makes the EL2044c an ideal choice for rf, if and video applications. further- more, the current drive of the EL2044c remains a minimum of 35ma at low temperatures. the EL2044c is current-limited at the output, allowing it to withstand shorts to ground. however, power dissipation with the output shorted can be in excess of the power-dissipation capabilities of the package. capacitive loads for ease of use, the EL2044c has been designed to drive any capacitive load. however, the EL2044c remains stable by automatically reducing its gain-bandwidth product as capacitive load increases. therefore, for max- imum bandwidth, capacitive loads should be reduced as much as possible or isolated via a series output resistor (r s ). similarly, coax lines can be driven, but best ac performance is obtained when they are terminated with their characteristic impedance so that the capacitance of the coaxial cable will not add to the capacitive load seen by the amplifier. although stable with all capacitive loads, some peaking still occurs as load capacitance increases. a series resistor at the output of the EL2044c can be used to reduce this peaking and further improve stability. printed-circuit layout the EL2044c is well behaved, and easy to apply in most applications. however, a few simple techniques will help assure rapid, high quality results. as with any high- frequency device, good pcb layout is necessary for optimum performance. ground-plane construction is highly recommended, as is good power supply bypass- ing. a 0.1f ceramic capacitor is recommended for bypassing both supplies. lead lengths should be as short as possible, and bypass capacitors should be as close to the device pins as possible. for good ac performance, parasitic capacitances should be kept to a minimum at both inputs and at the output. resistor values should be kept under 5k w because of the rc time constants associ- ated with the parasitic capacitance. metal-film and carbon resistors are both acceptable, use of wire-wound resistors is not recommended because of their parasitic inductance. similarly, capacitors should be low-induc- tance for best performance. the EL2044c macromodel this macromodel has been developed to assist the user in simulating the EL2044c with surrounding circuitry. it has been developed for the pspice simulator (copywrit- ten by the microsim corporation), and may need to be rearranged for other simulators. it approximates dc, ac, and transient response for resistive loads, but does not accurately model capacitive loading. this model is slightly more complicated than the models used for low- frequency op-amps, but it is much more accurate for ac analysis. the model does not simulate these characteristics accurately: noise non-linearities settling-time temperature effects cmrr psrr manufacturing variations
11 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c EL2044c macromodel in+ in+ in+ in+ in+in+ninininin * connections: +input * | -input * | | +vsupply * | | | -vsupply * | | | | output * | | | | | .subckt m2044 3 2 7 4 6 * * input stage * ie 7 37 1ma r6 36 37 800 r7 38 37 800 rc1 4 30 850 rc2 4 39 850 q1 30 3 36 qp q2 39 2 38 qpa ediff 33 0 39 30 1.0 rdiff 33 0 1meg * * compensation section * ga 0 34 33 0 1m rh 34 0 2meg ch 34 0 1.3pf rc 34 40 1k cc 40 0 1pf * * poles * ep 41 0 40 0 1 rpa 41 42 200 cpa 42 0 1pf rpb 42 43 200 cpb 43 0 1pf * * output stage * ios1 7 50 1.0ma ios2 51 4 1.0ma q3 4 43 50 qp q4 7 43 51 qn q5 7 50 52 qn q6 4 51 53 qp ros1 52 6 25 ros2 6 53 25 * * power supply current * ips 7 4 2.7ma * in+ in+ in+ in+ in+in+ninininin * models * .model qn npn(is=800e-18 bf=200 tf=0.2ns) .model qpa pnp(is=864e-18 bf=100 tf=0.2ns) .model qp pnp(is=800e-18 bf=125 tf=0.2ns) .ends
12 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c EL2044c macromodel
13 EL2044c low power/low voltage 120mhz unity-gain stable operational amplifier e l 2 0 4 4 c general disclaimer specifications contained in this data sheet are in effect as of the publication date shown. elantec, inc. reserves the right to make changes in the cir- cuitry or specifications contained herein at any time without notice. elantec, inc. assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. warning - life support policy elantec, inc. products are not authorized for and should not be used within life support systems without the specific written consent of elantec, inc. life support systems are equipment intended to sup- port or sustain life and whose failure to perform when properly used in accordance with instructions provided can be reasonably expected to result in significant personal injury or death. users con- templating application of elantec, inc. products in life support systems are requested to contact elantec, inc. factory headquarters to establish suitable terms & conditions for these applications. elan- tec, inc.?s warranty is limited to replacement of defective components and does not cover injury to persons or property or other consequential damages. s e p t e m b e r 2 6 , 2 0 0 1 printed in u.s.a. elantec semiconductor, inc. 675 trade zone blvd. milpitas, ca 95035 telephone: (408) 945-1323 (888) elantec fax: (408) 945-9305 european office: +44-118-977-6020 japan technical center: +81-45-682-5820

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