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lm136-5.0/lm236-5.0/lm336-5.0 5.0v reference diode general description the lm136-5.0/lm236-5.0/lm336-5.0 integrated circuits are precision 5.0v shunt regulator diodes. these monolithic ic voltage references operate as a low temperature coefficient 5.0v zener with 0.6 ? dynamic impedance. a third terminal on the lm136-5.0 allows the reference voltage and tempera- ture coefficient to be trimmed easily. the lm136-5.0 series is useful as a precision 5.0v low voltage reference for digital voltmeters, power supplies or op amp circuitry. the 5.0v makes it convenient to obtain a stable reference from low voltage supplies. further, since the lm136-5.0 operates as a shunt regulator, it can be used as either a positive or negative voltage reference. the lm136-5.0 is rated for operation over ?55?c to +125?c while the lm236-5.0 is rated over a ?25?c to +85?c tem- perature range. the lm336-5.0 is rated for operation over a 0?c to +70?c temperature range. see the connection dia- grams for available packages. for applications requiring 2.5v see lm136-2.5. features n adjustable 4v to 6v n low temperature coefficient n wide operating current of 600 a to 10 ma n 0.6 ? dynamic impedance n 1% initial tolerance available n guaranteed temperature stability n easily trimmed for minimum temperature drift n fast turn-on n three lead transistor package connection diagrams to-92 plastic package 00571604 bottom view order number lm336z-5.0 or lm336bz-5.0 see ns package number z03a to-46 metal can package 00571605 bottom view order number lm136h-5.0, lm136h-5.0/883, lm236h-5.0, lm136ah-5.0, lm136ah-5.0/883, or lm236ah-5.0 see ns package number h03h so package 00571607 order number lm336m-5.0 or lm336bm-5.0 see ns package number m08a june 2005 lm136-5.0/lm236-5.0/lm336-5.0 5.0v reference diode ? 2005 national semiconductor corporation ds005716 www.national.com
typical applications 5.0v reference 00571601 5.0v reference with minimum temperature coefficient 00571615 ? adjust to 5.00v * any silicon signal diode trimmed 4v to 6v reference with temperature coefficient independent of breakdown voltage 00571603 * does not affect temperature coefficient lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 2
absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/ distributors for availability and specifications. reverse current 15ma forward current 10ma storage temperature ?60?c to +150?c operating temperature range (note 2) lm136-5.0 ?55?c to +150?c lm236-5.0 ?25?c to +85?c lm336-5.0 0?c to +70?c soldering information to-92 package (10 sec.) 260?c to-46 package (10 sec.) 300?c so package vapor phase (60 sec.) 215?c infrared (15 sec.) 220?c see an-450 ?surface mounting methods and their effect on product reliability? (appendix d) for other methods of sol- dering surface mount devices. electrical characteristics (note 3) lm136a-5.0/lm236a-5.0 lm336b-5.0 parameter conditions lm136-5.0/lm236-5.0 lm336-5.0 units min typ max min typ max reverse breakdown voltage t a =25?c, i r =1 ma lm136-5.0/lm236-5.0/lm336-5.0 4.9 5.00 5.1 4.8 5.00 5.2 v lm136a-5.0/lm236a-5.0, lm336b-5.0 4.95 5.00 5.05 4.90 5.00 5.1 v reverse breakdown change t a =25?c, 6 12 6 20 mv with current 600 a i r 10 ma reverse dynamic impedance t a =25?c, i r =1 ma, f = 100 hz 0.6 1.2 0.6 2 ? temperature stability v r adjusted 5.00v (note 4) i r =1 ma, ( figure 2 ) 0?c t a 70?c (lm336-5.0) 4 12 mv ?25?c t a +85?c (lm236-5.0) 7 18 mv ?55?c t a +125?c (lm136-5.0) 20 36 mv reverse breakdown change 600 a i r 10 ma 6 17 6 24 mv with current adjustment range circuit of figure 1 1 1v reverse dynamic impedance i r = 1 ma 0.8 1.6 0.8 2.5 ? long term stability t a =25?c 0.1?c, i r =1 ma, t = 1000 hrs 20 20 ppm note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. electrical specifications do not apply when operating the devi ce beyond its specified operating conditions. note 2: for elevated temperature operation, t j max is: lm136 150?c lm236 125?c lm336 100?c thermal resistance to-92 to-46 so-8 ja (junction to ambient) 180?c/w (0.4" leads) 440?c/w 165?c/w 170?c/w (0.125" leads) ja (junction to case) n/a 80?c/w n/a note 3: unless otherwise specified, the lm136-5.0 is specified from ?55?c t a +125?c, the lm236-5.0 from ?25?c t a +85?c and the lm336-5.0 from 0?c t a +70?c. note 4: temperature stability for the lm336 and lm236 family is guaranteed by design. design limits are guaranteed (but not 100% percent production tested) o ver the indicated temperature and supply voltage ranges. these limits are not used to calculate outgoing quality levels. stability is defined as the maxi mum charge in v ref from 25?c to t a (min) or t a (max). lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 3
typical performance characteristics reverse voltage change zener noise voltage 00571617 00571618 dynamic impedance response time 00571619 00571620 reverse characteristics temperature drift 00571621 00571622 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 4
typical performance characteristics (continued) forward characteristics 00571623 application hints the lm136-5.0 series voltage references are much easier to use than ordinary zener diodes. their low impedance and wide operating current range simplify biasing in almost any circuit. further, either the breakdown voltage or the tempera- ture coefficient can be adjusted to optimize circuit perfor- mance. figure 1 shows an lm136-5.0 with a 10k potentiometer for adjusting the reverse breakdown voltage. with the addition of r1 the breakdown voltage can be adjusted without affect- ing the temperature coefficient of the device. the adjustment range is usually sufficient to adjust for both the initial device tolerance and inaccuracies in buffer circuitry. if minimum temperature coefficient is desired, four diodes can be added in series with the adjustment potentiometer as shown in figure 2 . when the device is adjusted to 5.00v the temperature coefficient is minimized. almost any silicon sig- nal diode can be used for this purpose such as a 1n914, 1n4148 or a 1n457. for proper temperature compensation the diodes should be in the same thermal environment as the lm136-5.0. it is usually sufficient to mount the diodes near the lm136-5.0 on the printed circuit board. the abso- lute resistance of the network is not critical and any value from 2k to 20k will work. because of the wide adjustment range, fixed resistors should be connected in series with the pot to make pot setting less critical. 00571609 figure 1. lm136-5.0 with pot for adjustment of breakdown voltage (trim range = 1.0v typical) 00571610 figure 2. temperature coefficient adjustment (trim range = 0.5v typical) lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 5
typical applications precision power regulator with low temperature coefficient 00571611 * adjust for 6.25v across r1 5v crowbar 00571612 adjustable shunt regulator 00571613 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 6
typical applications (continued) linear ohmmeter 00571614 op amp with output clamped 00571624 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 7
typical applications (continued) bipolar output reference 00571625 5.0v square wave calibrator 00571626 10v buffered reference 00571627 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 8
typical applications (continued) low noise buffered reference 00571628 wide input range reference 00571629 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 9
schematic diagram 00571616 lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 10
physical dimensions inches (millimeters) unless otherwise noted to-46 metal can package (h) order number lm136h-5.0, lm136h-5.0/883, lm236h-5.0, lm136ah-5.0, lm136ah-5.0/883 or lm236ah-5.0 ns package number h03h small outline (so-8) package order number lm336m-5.0 or lm336bm-5.0 ns package number m08a lm136-5.0/lm236-5.0/lm336-5.0 www.national.com 11
physical dimensions inches (millimeters) unless otherwise noted (continued) plastic package (z) order number lm336z-5.0 or lm336bz-5.0 ns package number z03a national does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and national reserves the right at any time without notice to change said circuitry and specifications. for the most current product information visit us at www.national.com. life support policy national?s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president and general counsel of national semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. banned substance compliance national semiconductor manufactures products and uses packing materials that meet the provisions of the customer products stewardship specification (csp-9-111c2) and the banned substances and materials of interest specification (csp-9-111s2) and contain no ??banned substances?? as defined in csp-9-111s2. leadfree products are rohs compliant. national semiconductor americas customer support center email: new.feedback@nsc.com tel: 1-800-272-9959 national semiconductor europe customer support center fax: +49 (0) 180-530 85 86 email: europe.support@nsc.com deutsch tel: +49 (0) 69 9508 6208 english tel: +44 (0) 870 24 0 2171 fran?ais tel: +33 (0) 1 41 91 8790 national semiconductor asia pacific customer support center email: ap.support@nsc.com national semiconductor japan customer support center fax: 81-3-5639-7507 email: jpn.feedback@nsc.com tel: 81-3-5639-7560 www.national.com lm136-5.0/lm236-5.0/lm336-5.0 5.0v reference diode

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