tl/h/11478 LM748 operational amplifier november 1994 LM748 operational amplifier general description the LM748 is a general purpose operational amplifier with external frequency compensation. the unity-gain compensation specified makes the circuit stable for all feedback configurations, even with capacitive loads. it is possible to optimize compensation for best high frequency performance at any gain. as a comparator, the output can be clamped at any desired level to make it com- patible with logic circuits. the LM748c is specified for operation over the 0 cto a 70 c temperature range. features y frequency compensation with a single 30 pf capacitor y operation from g 5v to g 20v y continuous short-circuit protection y operation as a comparator with differential inputs as high as g 30v y no latch-up when common mode range is exceeded y same pin configuration as the lm101 connection diagram dual-in-line package tl/h/11478 2 top view order number LM748cn see ns package number n08b c 1995 national semiconductor corporation rrd-b30m115/printed in u. s. a.
absolute maximum ratings if military/aerospace specified devices are required, please contact the national semiconductor sales office/distributors for availability and specifications. supply voltage g 22v power dissipation (note 1) 500 mw differential input voltage g 30v input voltage (note 2) g 15v output short-circuit duration (note 3) operating temperature range: LM748c 0 cto a 70c storage temperature range b 65 cto a 150 c lead temperature (soldering, 10 sec.) a 300 c electrical characteristics (note 4) parameter conditions min typ max units input offset voltage t a e 25 c, r s s 10 k x 1.0 5.0 mv input offset current t a e 25 c 40 200 na input bias current t a e 25 c 120 500 na input resistance t a e 25 c 300 800 k x supply current t a e 25 c, v s e g 15v 1.8 2.8 ma large signal t a e 25 c, v s e g 15v 50 160 v/mv voltage gain v out e g 10v, r l t 2k x input offset voltage r s s 10 k x 6.0 mv average temperature r s s 50 x 3.0 m v/ c coefficient of input r s s 10 k x 6.0 m v/ c offset voltage input offset current t a e 0 cto a 70 c 300 na t a eb 55 cto a 125 c 500 na input bias current t a e 0 cto a 70 c 0.8 m a t a eb 55 cto a 125 c 1.5 m a supply current t a ea 125 c, v s e g 15v 1.2 2.25 ma t a eb 55 cto a 125 c 1.9 3.3 ma large signal v s e g 15v, v out e g 10v 25 v/mv voltage gain r l t 2k x output voltage v s e g 15v, r l e 10 k x g 12 g 14 v swing v s e g 15v, r l e 2k x g 10 g 13 v input voltage range v s e g 15v g 12 v common-mode r s s 10 k x 70 90 db rejection ratio supply voltage r s s 10 k x 77 90 db rejection ratio note 1: for operating at elevated temperatures, the device must be derated based on a maximum junction to case thermal resistance of 45 c per watt, or 150 c per watt junction to ambient. (see curves). note 2: for supply voltages less than g 15v, the absolute maximum input voltage is equal to the supply voltage. note 3: continuous short circuit is allowed for case temperatures to a 125 c and ambient temperatures to a 70 c. note 4: these specifications apply for g 5v s v s s a 15v and 0 c s t a s a 70 c, unless otherwise specified. 2
typical applications inverting amplifier with balancing circuit 2 may be zero or equal to parallel tl/h/11478 3 combination of r1 and r2 for minimum offset. voltage comparator for driving dtl or ttl integrated circuits tl/h/11478 4 voltage comparator for driving rtl logic or high current driver tl/h/11478 5 guaranteed performance characteristics (note 4) input voltage range output swing voltage gain tl/h/11478 6 3
typical performance characteristics supply current voltage gain input bias current current limiting input current dissipation maximum power frequency response open loop frequency response large signal pulse response voltage follower tl/h/11478 7 4
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LM748 operational amplifier physical dimensions inches (millimeters) dual-in-line package (n) order number LM748cn ns package number n08e 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 of national semiconductor corporation. as used herein: 1. life support devices or systems are devices or 2. a critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. national semiconductor national semiconductor national semiconductor national semiconductor corporation europe hong kong ltd. japan ltd. 1111 west bardin road fax: ( a 49) 0-180-530 85 86 13th floor, straight block, tel: 81-043-299-2309 arlington, tx 76017 email: cnjwge @ tevm2.nsc.com ocean centre, 5 canton rd. fax: 81-043-299-2408 tel: 1(800) 272-9959 deutsch tel: ( a 49) 0-180-530 85 85 tsimshatsui, kowloon fax: 1(800) 737-7018 english tel: ( a 49) 0-180-532 78 32 hong kong fran 3 ais tel: ( a 49) 0-180-532 93 58 tel: (852) 2737-1600 italiano tel: ( a 49) 0-180-534 16 80 fax: (852) 2736-9960 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.
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