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december 2004 revision 2 1/11 adjustable output voltage: 1.24 to 24v several precision @ 25c 2%, 1%, 0.5% and 0.25% sink current capability: 0.4 to 100ma industrial temperature range: -40 to +125c performances compatible with industry standard tl431 description the ts3431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire temperature range of operation (-40 to +125c). the output voltage may be set to any value between 1.24v and 24v with an external resistor bridge. available in sot23-3 surface mount package, it can be designed in applications where space saving is a critical issue. applications computers instrumentation battery chargers switch mode power supply battery operated equipments pin connections (top view) order codes l sot23-3l (plastic micropackage) z to-92 (plastic package) to-92 (top view) sot23-3 (top view) 3 1 2 cathode reference anode ts3431 part number temperature range package packaging marking ts3431ilt/ailt/bilt/cilt -40, +125c sot23-3l tape & reel l280-l281 l282-l283 ts3431iz/aiz/biz/ciz to-92 bulk ts3431izt/aizt/bizt/cizt tape & reel ts3431iz-ap/aiz-ap/biz-ap/ciz-ap ammo pack ts3431 1.24v programmable shunt voltage reference
ts3431 absolute maximum ratings 2/11 1 absolute maximum ratings table 1. key parameters and their absolute maximum ratings symbol parameter value unit v ka cathode to anode voltage 25 v i k reverse breakdown current -100 to +150 ma i ref reference current -0.05 to10 ma p d power dissipation 1 sot23-3 to92 1) pd has been calculated with t amb = 25c and t j = 150c and rthjc = 66c/w, rthja = 200c/w for the to92 package rthjc = 110c/w, rthja = 340c/w for the sot23-3l package 360 625 mw t std storage temperature -65 to +150 c esd human body model (hbm) 2 kv machine model (mm) 200 v tlead lead temperature (soldering, 10 seconds) 250 c table 2. operating conditions symbol parameter value unit i k cathode operating current 0.5 to 100 ma v k cathode operating voltage 1.24 to 24 v t oper operating free air temperature range -40 to +125 c
electrical characteristics ts3431 3/11 2 electrical characteristics table 3. tamb = 25c (unless otherwise specified) symbol parameter test condition min. typ. max. unit v k reference input voltage i k = 10 ma ts3431 (2%) 1.215 1.24 1.265 v ts3431a (1%) 1.228 1.252 ts3431b (0.5%) 1.234 1.246 ts3431c (0.25%) 1.237 1.243 ? v k variation of reference input voltage over temperature 0c < t < +70c 10 mv -40c < t < +105c 18 -40c < t < +125c 21 t c temperature coefficient -40c < t < +125c 100 ppm/c i kmin minimum operating current t = 25c 0.35 0.4 ma -40c < t < +125c 0.5 ratio of change in reference input volt- age to change in cathode to anode volt- age i k =10ma v k = 24 to 1.24v 1.2 1.5 mv/v -40c < t < +125c 2 i ref reference input current i k =10ma, r1=10k ?, r2=+ t=25c 0.9 1.5 a -40c < t < +125c 2 ? i ref reference input current deviation i k =10ma, r1=10k ?, r2=+ 0c < t < +70c 0.5 1 a -40c < t < +125c 0.9 1.5 i off off-state cathode current v k =24v t=25c 35 500 na -40c < t < +105c 1000 -40c < t < +125c 2000 r ka reverse static impedance i k = 1 to 100ma 0.2 0.4 ? e n wideband noise i k = 10 ma 1khz < f < 100khz 100 nv/ hz note: limits are 100% production tested at 25c. limits over temperature are guaranteed through correlation and by design. ? vref ? vka --------------- -
ts3431 electrical characteristics 4/11 figure 1. reference voltage vs. temperature figure 2. cathode voltage vs cathode current figure 3. reference input current vs temperature -40 0 40 80 120 1.230 1.235 1.240 1.245 1.250 i k = 10ma v k = v ref voltage reference (v) temperature (c) 0.0 0.1 0.2 0.3 0.4 0.0 0.5 1.0 1.5 t=+125c t=+25c t=-40c cathode voltage v k (v) cathode current i k (ma) -40 0 40 80 120 0.00 0.25 0.50 0.75 1.00 reference current i ref (a) temperature (c) figure 4. test circuit for v k = vref figure 5. minimum operating current vs temperature figure 6. dynamic impedance vs frequency input vka vref ik output -40 0 40 80 120 0.0 0.1 0.2 0.3 0.4 0.5 v k = v ref minimum operating current i kmin (ma) temperature (c) 10 100 1000 10000 0.0 0.1 0.2 0.3 0.4 0.5 v k = v ref t=+25c dynamic impedance z ka ( ? ) frequency (hz)
electrical characteristics ts3431 5/11 figure 7. off-state current vs temperature figure 8. ratio of change in reference input voltage to change in vka voltage vs temperature figure 9. phase and gain vs frequency -40 0 40 80 120 0 100 200 300 off state current i of f (na) temperature (c) -40 0 40 80 120 0.0 0.5 1.0 1.5 2.0 ? v k = 1.24 to 24v i k = 10 ma ? v ref / ? v k (mv/v) temperature (c) 1000 10000 100000 1000000 0 20 40 0 40 80 t = +25c gain (db) frequency (hz) phase () figure 10. test circuit for off-state current measurement figure 11. test circuit for v k > v ref figure 12. test circuit for phase and gain measurement vka=24v ioff input ik vka = vref . (1+r1/r2) + iref . r1 vka r1 r2 iref vref i k =10ma output 4.3 k ? intput 6.8 k ? 10 f 10 f
ts3431 electrical characteristics 6/11 figure 13. pulse response at ik=1ma figure 14. pulse response at ik = 10ma figure 15. block diagram 02468 0.0 2.5 5.0 . . . . . . t=+25c output voltage input voltage voltage (v) time (s) 02468 0.0 2.5 5.0 t=+25c output voltage input voltage . . . . . . voltage (v) time (s) v ref anode cathode reference + - figure 16. test circuit for pulse response at ik = 1ma figure 17. test circuit for pulse response at ik = 10ma figure 18. equivalent input noise vs frequency i k =1ma output 2.7k ? intput 0 4v i k =10ma output 270 ? intput 0 4v 0.1 1 10 100 1000 10000 0 100 200 300 v k = v ref i k = 10 ma t = +25c noise (nv / hz) frequency (khz)
package mechanical data ts3431 7/11 3 package mechanical data 3.1 3 pins - plastic package to-92 (tape & reel) dim. millimeters inches min. typ. max. min. typ. max. al 5.0 0.197 a 5.0 0.197 t 4.0 0.157 d 0.45 0.018 i1 2.5 0.098 p 11.7 12.7 13.7 0.461 0.500 0.539 po 12.4 12.7 13 0.488 0.500 0.512 p2 5.95 6.35 6.75 0.234 0.250 0.266 f1/f2 2.4 2.5 2.8 0.094 0.098 0.110 ? h -1 0 1 -0.039 0 0.039 ? p -1 0 1 -0.039 0 0.039 w 17.5 18.0 19.0 0.689 0.709 0.748 w0 5.7 6 6.3 0.224 0.236 0.248 w1 8.5 9 9.75 0.335 0.354 0.384 w2 0.5 0.020 h200.787 h0 15.5 16 16.5 0.610 0.630 0.650 h1 25 0.984 do 3.8 4.0 4.2 0.150 0.157 0.165 l1 11 0.433 a1 p p a t h h1 h l1 d i1 h0 w2 w0 w1 w d0 f1 f2 p2 p0
ts3431 package mechanical data 8/11 3.2 3 pins - plastic package to-92 (tape ammo pack) dim. millimeters inches min. typ. max. min. typ. max. al 5.0 0.197 a 5.0 0.197 t 4.0 0.157 d 0.45 0.018 i1 2.5 0.098 p 11.7 12.7 13.7 0.461 0.500 0.539 po 12.4 12.7 13 0.488 0.500 0.512 p2 5.95 6.35 6.75 0.234 0.250 0.266 f1/f2 2.4 2.5 2.8 0.094 0.098 0.110 ? h -1 0 1 -0.039 0 0.039 ? p -1 0 1 -0.039 0 0.039 w 17.5 18.0 19.0 0.689 0.709 0.748 w0 5.7 6 6.3 0.224 0.236 0.248 w1 8.5 9 9.75 0.335 0.354 0.384 w2 0.5 0.020 h 20 0.787 h0 15.5 16 16.5 0.610 0.630 0.650 h1 25 0.984 do 3.8 4.0 4.2 0.150 0.157 0.165 l1 11 0.433 a1 p p a t h h1 h l1 d i1 h0 w2 w0 w1 w d0 f1 f2 p2 p0
package mechanical data ts3431 9/11 3.3 3 pins - plastic package to-92 (bulk) dim. mm. mils min. typ max. min. typ. max. a 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 d 4.45 4.95 175.2 194.9 e 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 l 12.7 15.49 500.0 609.8 r 2.16 2.41 85.0 94.9 s1 0.92 1.52 36.2 59.8 w 0.41 0.56 16.1 22.0 to-92 mechanica data 0102782/c
ts3431 package mechanical data 10/11 3.4 sot23-3l package dim. mm. mils min. typ max. min. typ. max. a 0.890 1.120 35.05 44.12 a1 0.010 0.100 0.39 3.94 a2 0.880 0.950 1.020 34.65 37.41 40.17 b 0.300 0.500 11.81 19.69 c 0.080 0.200 3.15 7.88 d 2.800 2.900 3.040 110.26 114.17 119.72 e 2.100 2.64 82.70 103.96 e1 1.200 1.300 1.400 47.26 51.19 55.13 e 0.950 37.41 e1 1.900 74.82 l 0.400 0.600 15.75 23.63 l1 0.540 21.27 k88 sot23-3l mechanical data a a1 a2 d e e1 b e e1 0.10 c c seating plane l1 l 0.25 gauge plane c 7110469/a
revision history ts3431 11/11 4 revision history date revision description of changes 01 jan. 2004 1 first release 01 dec. 2004 2 specific content changes as follows: ci version added in table: order codes on page 1 rthjc information added in table1: key parameters and their absolute maximum ratings on page 2 test condition added in table3: tamb = 25c (unless otherwise specified) on page 3 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2004 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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