advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 advanced ams3100 - 1.2 monolithic micropower voltage reference systems features applications 6 mv ( 0.5%) max. initial tolerance (a grade) battery powered systems operating current 10 m m a to 20ma instrumentation low voltage reference 1.240 a/d, d/a converters max. 0.5 w w dynamic impedance (a grade) temperature measurement low temperature coefficient current sources sot - 23 packag e available notebook/personal computer low cost monitors/ vcr/ tv pagers general description the ams3100 - 1.2 are two - terminal micropower band - gap voltage reference that feature a very low dynamic impedance and good temperature coefficien t, operating over a 10 a to 20ma current range. ams3100 - 1.2 is trimmed at wafer test level to optimize the temperature coefficient and tight output voltage tolerance. the advanced process technology used, makes the ams3100 - 1.2 exceptionally tolerant of cap acitive loading, making it easy to use in almost any reference application. the wide dynamic operating range allows its use with widely varying supplies with excellent regulation. the extremely low power drain, makes these reference diodes useful for micro power circuitry. these voltage references can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. further more, the wide operating current allows it to replace older references with a ti ght tolerance part. pin to pin compatible with other standard industry references, the ams3100 - 1.2 offers the advantage of long term stability at low cost. the ams3100 - 1.2 is operating over a - 40 c to 85 c temperature range and is available in the space saving sot - 23 package. ordering information : tol. package type operating sot - 23 temperature range 6mv ams3100 - 1.2am - 40 c to 85 c 12mv ams3100 - 1.2bm - 40 c to 85 c 25mv ams3100 - 1.2cm - 40 c to 85 c pin connections 3l sot - 23 (m) + - 3 * 2 1 top view *t his pin must be left floating or connected to pin 2
advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 ams3100 - 1.2 absolute maximum ratings (note 1) reverse current 30ma lead temperature forward current 10ma vapor phase (60 sec) 215 c operating temperatu re range - 40 c to 85 c infrared (15 sec.) 220 c storage temperature - 55 c to +150 c thermal resistance ( q ja ) 410 c/w electrical characteristics electrical characteristics at i r = 100 m a, and t a = +25c unle ss otherwise specified. parameter conditions ams3100a - 1.2 min typ max ams3100b - 1.2 min typ max ams3100c - 1.2 min typ max units reverse breakdown voltage (note 3) i r - 100 a 1.229 1.235 1.241 1.223 1. 235 1.249 1.210 1.235 1.260 v reverse dynamic impedance (note 4) i r - 100 a, f =20hz 0.2 0.50 0.5 0.5 w reverse breakdown voltage change with current (note 3) 10 m a i r 1ma 1ma i r 20ma 1.0 5 1.0 5 1.0 5 mv min . operating current (note 3) 5 10 15 5 10 15 5 10 15 m a m a wide band noise (note 4) i r - 100 a, 10hz f 10khz 60 60 60 m v temperature coeff. (note 5) 25 50 40 100 75 ppm/c long term stability (note 4) t a =25c.1c t = 1000 hr 20 20 20 ppm note 1: absolute maximum ratings indicate limits beyond which damage to the device may occur. operating ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. for guaranteed specifications and test conditions, see the electrical characteristics . the guaranteed specifications apply only for the test conditions listed. note 2: parameters identified with boldface type apply at temperature extremes. all other numbe rs apply at t a = t j = 25c. note 3: guaranteed and 100% production tested. note 4: guaranteed but not 100% production tested. these limits are not used to calculate average outgoing quality levels. note 5: the average temperature coefficient is defined as the maximum deviation of reference voltage at all measured temperatures between the operating t max and t min , divided by t max - t min . the measured temperatures are 0 c, 25 c, 85 c. typical applications wide input micropower reference reference from range reference from 9v battery 1.5v battery 4.3k lm334 out 1.24v ams3100-1.2 v in = 2.3v to 30v ams3100-1.2 1.2v 500k 9v ams3100-1.2 1.2v 3k 1.5v
advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 ams3100 - 1.2 typical applications (continued) 0 c - 100 c thermometer lower power thermometer 0 c - 100 c thermometer ams3100-1.2 150 r1 4k r2 1k r3 100 r4 220 1.5v (1.3-1.6v)? r v - v + lm334 m 0-100 m a i out calibration 1 . short ams3100 - 1.2, adjust r3 for i out = temp at 1 m a/ k 2. remove short, adjust r2 for correct reading in c ? i q at 1.3v @ 500 m a i q at 1.6v @ 2.4ma lm334 m ams3100-1.2 1.3 to 1.6v? * 8k to 12k? * 2n3638 or 2n2907 select for inverse h fe @ 5 ? select for operation at 1.3v ? i q @ 600 m a to 900 m a ams3100-1.2 150 r1 2k r2 1k r3 50 r4 100 1.3-1.6v r v - v + lm334 m 0-50 m a i out calibration 1. short ams3100 - 1.2, adjust r3 for i out = temp at 1.8 m a/ k 2. remove short, adjust r2 for correct reading in f centigrade thermometer micropower* 10v reference ams3100-1.2 v + v - r r1 1k v1 v2 lm334 90k 25k 27k 1.2k 2.3k output 1mv/ c 2.2k 1.5v? calibration 1. adjust r1 so that v1 = temp at 1mv/ k. 2. adjust v2 to 273.2mv. ? i q for 1.3v to 1.6v battery voltage = 50 m a to 150 m a 150pf ams3100-1.2 3.5m 500k 22m 1m 7 4 6 3 2 - + v in = 15v i q 10v lm4250c 8 *i q @ 20 m a standby current
advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 ams3100 - 1.2 typical applications (continued) micropower thermocouple cold ju nction compensator + lm334 ams3100-1.2 r1 r2 zero adj 100k 1m 1% 5.1k 2k 1% tc adj 500 meter mercury cell 1.345v + - v + v - r thermocouple + - cold junction iso thermal with lm334 adjustment procedure 1. adjust tc adj pot until voltage across r1 equals kelvin temperature multiplied by the thermocouple seebeck coefficient. 2. adjust zero adj pot until voltage across r2 equals t he thermocouple seebeck coefficient multiplied by 273.2. thermocouple seebeck r1 r2 voltage voltage type coefficient ( w w ) ( w w ) across r1 across r2 (mv/ c) @ 25 c (mv) (mv) j 52.3 523 1.24k 15.60 14.32 t 42.8 432 1k 12.77 11.78 k 40.8 408 953 w 12.17 11.17 s 6.4 63.4 150 w 1.908 1.766 typical supply current 50 m a precision 1 m m a to 1ma current sources 7 4 3 2 + - lm312 6 ams3100-1.2 r2 r1 100k -30v -1.5v to -27v c1 150pf i out * *i out =1.23v/r2 7 4 3 2 + - lm312 6 r2 r1 100k 30v 1.5v to 27v c1 150pf i out * ams3100-1.2
advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 ams3100 - 1.2 typical performance characteristics -2 2 4 8 10 0.1 1 10 100 reverse characteristics 0 6 output voltage change (mv) t a =25 c 0.1 100 0.1 1 10 100 reverse dynamic impedance 1 10 dynamic impedance ( w ) 0.01 0 0.4 1.2 0.1 1 10 100 0.8 0.01 reverse current (ma) reverse current (ma) 0 0.2 0.4 0.6 0.8 1.0 1.2 0.1 100 10 1.4 reverse voltage (v) reverse current ( m a) 1 reverse characteristics forward characteristics forward current (ma) forward voltage (v) 10 100 1k 10k 100k 0.1 1k 10 reverse dynamic impedance 1m frequency (hz) dynamic impedance ( w ) 1 10k 100 -55 5 25 45 65 85 105 1.260 1.240 125 reference voltage (v) temperature drift of 3 representative units 0 10 0 1.0 2.0 0 200 400 600 time ( m s) response time voltage swing (v) 0.5 1.5 ~ ~ ~ ~ 0 200 400 600 700 100 1k 10k 100k noise voltage 100 500 noise (nv/ ? hz) i r = 100 m a 10 frequency (hz) 300 100 1k 10k 100k cutoff frequency (hz) integrated noise ( m v ) 0 10 20 30 40 50 60 70 temperature ( c) 1.250 1.230 1.220 -35 -15 i r = 100 m a t a =70 c t a =70 c t a =25 c t a =25 c t a =70 c t a =25 c i r = 100 m a t a =25 c t a =70 c i r = 100 m a 100 m a output ams3100-1.2 output 100k input output input single pole low pass sharp cutoff filter filtered output noise 0.01
advanced monolithic systems, inc. www.advanced - monolithic.com phone (925) 443 - 0722 fax (925) 443 - 0723 ams3100 - 1.2 pack age dimensions inches (millimeters) unless otherwise noted. 3 lead sot - 23 plastic package (m) 0.047-0.055 (1.194-1.397) 0.015-0.017 (0.381-0.432) 0.110-0.120 (2.794-3.048) 0.083-0.098 (2.108-2.489) 0.035-0.040 (0.889-1.016) 0.070-0.080 (1.778-2.032) 0.018-0.024 (0.457-0.610) 10 nom 0.0034-0.0050 (0.086-0.127) (sot-23 ) ams drw# 051991 0.035-0.041 (0.089-1.041) 0.0005-0.0040 (0.013-0.102) 0.018-0.024 (0.457-0.610) 10 nom
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