low voltage reference a precision bandgap voltage reference designed for critical instrumentation and d/a converter applications. this unit is designed to work with d/a converters, up to 12 bits in accuracy, or as a reference for power supply applications. ? output voltage: 2.5 v 25 mv ? input voltage range: 4.5 v to 40 v ? quiescent current: 1.2 ma typical ? output current: 10 ma ? temperature coefficient: 10 ppm/ c typical ? guaranteed temperature drift specification ? equivalent to ad580 ? standard 8pin dip, and 8pin soic package typical applications ? voltage reference for 8 to 12 bit d/a converters ? low t c zener replacement ? high stability current reference ? voltmeter system reference maximum ratings (t a = 25 c, unless otherwise noted.) rating symbol value unit input voltage v i 40 v storage temperature t stg 65 to 150 c junction temperature t j +175 c operating ambient temperature range mc1403b mc1403 t a 40 to +85 0 to +70 c c figure 1. a reference for monolithic d/a converters *caution: system stability may be affected if output capacitance * exceeds 1.0 m f. using higher capacitance values is not * recommended and should be carefully considered. mc1403 1.0 k 3 2 1 +5.0 v 1.2 k r3 i ref full scale adjust 500 w monolithic d/a converter *0.1 m f c1 r2 r1 reference amplifier providing the reference current for on semiconductor monolithic d/a converters the mc1403 makes an ideal reference for many mono- lithic d/a converters, requiring a stable current reference of nominally 2.0 ma. this can be easily obtained from the mc1403 with the addition of a series resistor, r1. a variable resistor, r2, is recommended to provide means for full scale adjust on the d/a converter. the resistor r3 improves temperature performance by matching the impedance on both inputs of the d/a reference amplifier. the capacitor decouples any noise present on the reference line. it is essential if the d/a converter is located any appreciable distance from the reference. a single mc1403 reference can provide the required current input for up to five of the monolithic d/a converters. 2.5v on semiconductor ? semiconductor components industries, llc, 2001 march, 2001 rev. 2 1 publication order number: mc1403/d mc1403, b semiconductor technical data precision low voltage reference ordering information p1 suffix plastic package case 626 d suffix plastic package case 751 (so8) nc nc nc nc 8 1 3 v out gnd 4 2 nc 7 v in 6 5 8 1 8 1 device operating temperature range package mc1403d mc1403p1 mc1403bd mc1403bp1 t a = 0 to +70 c plastic dip so8 so8 plastic dip t a = 40 to +85 c pin connections
mc1403, b http://onsemi.com 2 electrical characteristics (v in = 15 v, t a = 25 c, unless otherwise noted.) characteristic symbol min typ max unit output voltage v out 2.475 2.5 2.525 v (i o = 0 ma) temperature coefficient of output voltage* d v o / d t 10 40 ppm/ c mc1403 output voltage change* d v o mv (over specified temperature range) mc1403 b 0 to +70 c mc1403b 40 to +85 c 7.0 12.5 line regulation (i o = 0 ma) reg line mv (15 v v i 40 v) (4.5 v v i 15 v) 1.2 0.6 4.5 3.0 load regulation reg load 10 mv (0 ma < i o < 10 ma) quiescent current i q 1.2 1.5 ma (i o = 0 ma) *guaranteed but not tested. figure 2. mc1403, b schematic 1.73k 1.5 k v out 32 1.483 k 10 k v in 2.0 k 2.0 k 30 pf c1 2.37 k 1.0 k 5.61 k 2.0 k 1.0 k 2.0 k this device contains 15 active transistors.
mc1403, b http://onsemi.com 3 v , change in v out (mv) d out v , change in v out (mv) d out -10 -12 t a , temperature ( c) 4.0 2.0 0 -2.0 -4.0 -6.0 -8.0 t a , temperature ( c) -12 -10 -8.0 -6.0 -4.0 -2.0 0 -14 figure 3. typical change in v out versus v in (normalized to v in = 15 v @ t c = 25 c) figure 4. change in output voltage versus load current (normalized to v out @ v in = 15 v, i out = 0 ma) v in , input voltage (v) 2.0 1.0 0 -1.0 -2.0 -3.0 -4.0 -5.0 -6.0 01020304050 v , change in v out (mv) d out 25 c 0 c 75 c i out , output current (ma) d v out , change in output voltage (mv) 10 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10 75 c 0 c 25 c figure 5. quiescent current versus temperature (v in = 15 v, i out = 0 ma) i 1 , quiescent current (ma) t a , temperature ( c) 0 1.25 1.20 1.15 1.10 1.05 1.00 0.95 0.90 80 60 40 20 0 -40 -20 figure 6. change in v out versus temperature (normalized to v out @ v in = 15 v) figure 7. change in v out versus temperature (normalized to t a = 25 c, v in = 15 v, i out = 0 ma) 85 70 50 30 10 -10 -30 80 60 40 20 0 -40 -20 85 70 50 30 10 -10 -30 v in = 5.0 v v in = 15 v i out = 2 ma 80 60 40 20 0 -40 -20 85 70 50 30 10 -10 -30 i o = 0 ma = 2.0 ma = 5.0 ma = 8.0 ma
mc1403, b http://onsemi.com 4 31/2digit voltmeter common anode displays, flashing overrange an example of a 31/2digit voltmeter using the mc14433 is shown in the circuit diagram of figure 8. the reference voltage for the system uses an mc1403 2.5 v reference ic. the full scale potentiometer can calibrate for a full scale of 199.9 mv or 1.999 v. when switching from 2.0 v to 200 mv operation, r i is also changed, as shown on the diagram. when using r c equal to 300 k w , the clock frequency for the system is about 66 khz. the resulting conversion time is approximately 250 ms. when the input is overrange, the display flashes on and off. the flashing rate is onehalf the conversion rate. this is done by dividing the eoc pulse rate by 2 with 1/2 mc14013b flipflop and blanking the display using the blanking input of the mc14543b. the display uses an led display with common anode digit lines driven with an mc14543b decoder and an mc1413 led driver. the mc1413 contains 7 darlington transistor drivers and resistors to drive the segments of the display. the digit drive is provided by four mpsa12 darlington transistors operating in an emitterfollower configuration. the mc14543b, mc14013b and led displays are referenced to v ee via pin 13 of the mc14433. this places the full power supply voltage across the display. the current for the display may be adjusted by the value of the segment resistors shown as 150 w in figure 8. figure 8. 31/2digit voltmeter common anode led display * r i = 470 k w for 2.0 v range r i = 27 k w for 200 mv range ** mylar capacitor 0.1 m f 3 2 1 +5.0 v 0.1 m f r c 300 k v x r i * 20 k -5.0 v 0.1 m f +5.0 v 0.1 m f 0.1 m f plus sign 50 m f minus sign segment resistors 150 w (7) mps-a12 +5.0 v mc14013b 51 k mc14433 0.1 m f cq q r s d 14 ds1 6 710 -5.0 v -5.0 v c 8 6 16 1 19 5.0 v d s r q q +5.0 v mps-a12 (4) 7 mc1403 200 w 110 w 0.1 m f ** ds2 ds3 ds4 1 2 8 13 12 11 9 4 3 5 10 1 2 3 4 5 9 5 3 2 4 16 15 14 13 11 12 7 15 14 13 6 11 10 14 16 17 18 15 8 7 6 5 4 13 12 9 22 23 21 24 1 12 20 2 10 11 3 ba c d e g f mc14543b mc1413 +5.0 v +5.0 v -5.0 v -5.0 v -5.0 v -5.0 v -5.0 v
mc1403, b http://onsemi.com 5 package dimensions p1 suffix plastic package case 62605 issue l notes: 1. dimension l to center of lead when formed parallel. 2. package contour optional (round or square corners). 3. dimensioning and tolerancing per ansi y14.5m, 1982. 14 5 8 f note 2 a b t seating plane h j g d k n c l m m a m 0.13 (0.005) b m t dim min max min max inches millimeters a 9.40 10.16 0.370 0.400 b 6.10 6.60 0.240 0.260 c 3.94 4.45 0.155 0.175 d 0.38 0.51 0.015 0.020 f 1.02 1.78 0.040 0.070 g 2.54 bsc 0.100 bsc h 0.76 1.27 0.030 0.050 j 0.20 0.30 0.008 0.012 k 2.92 3.43 0.115 0.135 l 7.62 bsc 0.300 bsc m --- 10 --- 10 n 0.76 1.01 0.030 0.040
mc1403, b http://onsemi.com 6 package dimensions d suffix plastic package case 75107 (so8) issue w seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 x y g m y m 0.25 (0.010) z y m 0.25 (0.010) z s x s m
mc1403, b http://onsemi.com 7 notes
mc1403, b http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. mc1403/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
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