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| 1 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas inc. 2010, 2011. all rights reserved intersil (and design) is a trademark owned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners. micropower, rail to rail input current sense amplifier with voltage output isl28006 the isl28006 is a micropower, uni-directional high-side and low-side current sense amplifier featuring a proprietary rail-to-rail input current sens ing amplifier. the isl28006 is ideal for high-side current sense applications where the sense voltage is usually much higher than the amplifier supply voltage. the device can be used to sense voltages as high as 28v when operating from a supply voltage as low as 2.7v. the micropower isl28006 consumes only 50a of supply current when operating from a 2.7v to 28v supply. the isl28006 features a common-mode input voltage range from 0v to 28v. the proprietary architecture extends the input voltage sensing range down to 0v, making it an excellent choice for low-side ground sensing applications. the benefit of this architecture is that a high degree of total output accuracy is maintained over the entire 0v to 28v common mode input voltage range. the isl28006 is available in fixed (100v/v, 50v/v, 20v/v and adjustable) gains in the space saving 5 ld sot-23 package and the 6 ld sot-23 package for the adjustable gain part. the parts operate over the extended temperature range from -40c to +125c. features ? low power consumption. . . . . . . . . . . . . . . . . . . . . . 50a, typ ? supply range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7v to 28v ? wide common mode input. . . . . . . . . . . . . . . . . . . . 0v to 28v ? gain versions - isl28006-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100v/v - isl28006-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50v/v - isl28006-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20v/v - isl28006-adj . . . . . . . . . . . . . . . . adj (min gain = 20v/v) ? operating temperature range . . . . . . . . . . . . -40c to +125c ? packages. . . . . . . . . . . . . . . . . . . . . .5 ld sot-23, 6 ld sot-23 applications ? power management/monitors ? power distribution and safety ? dc/dc, ac/dc converters ? battery management/charging ? automotive power distribution related literature ? see an1532 for ?isl28006 evaluation board user?s guide? figure 1. typical application figure 2. gain accuracy vs v rs+ = 0v to 28v isl28006 gnd isl28006 isl28006 +5vdc +12vdc + - +1.0vdc +1.0vdc sense sense sense output +5vdc output +12vdc output multiple output power supply i sense +12vdc i sense +5vdc i sense +1.0vdc + - + - r sense +5vdc +5vdc +5vdc r sense r sense 0246810121416182022242628 accuracy (%) -1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 v rs+ (v) +100c +25c -40c +125c gain 100 may 23, 2011 fn6548.5
isl28006 2 fn6548.5 may 23, 2011 block diagram pin configurations isl28006-100, 50, 20 (5 ld sot-23) top view isl28006-adj (6 ld sot-23) top view gnd r s- gm hi gm lo v sense 1.35v i mirror + - out r f r g r 1 r 5 v cc v sense r 2 r 3 r 4 i = 2.86a r s+ r 4 high-side low-side sensing and gnd r s- gm hi gm lo v sense 1.35v i mirror + - out r 1 v cc v sense r 2 r 3 r 4 i = 2.86a r s+ r 4 high-side low-side sensing and f b fixed gain parts adjustable gain part r 5 r f r g 1 2 3 5 4 v cc out gnd r s+ r s- fixed gain 1 2 3 6 4 fb out v cc gnd r s+ 5r s- adj. gain pin descriptions isl28006-100, 50, 20 (5 ld sot-23) isl28006-adj (6 ld sot-23) pin name description 16gndpower ground 1fbinput pin for external resistors 2 2 out amplifier output 33v cc positive power supply 44r s+ sense voltage non-inverting input 55r s- sense voltage inverting input r s- v cc r s+ gnd capacitively coupled esd clamp out capacitively coupled esd clamp fb isl28006 3 fn6548.5 may 23, 2011 ordering information part number (notes 1, 2, 3) gain part marking (note 4) package tape & reel (pb-free) pkg. dwg. # isl28006fh100z-t7 100v/v bdja 5 ld sot-23 p5.064a ISL28006FH100Z-T7A 100v/v bdja 5 ld sot-23 p5.064a isl28006fh50z-t7 50v/v bdha 5 ld sot-23 p5.064a isl28006fh50z-t7a 50v/v bdha 5 ld sot-23 p5.064a isl28006fh20z-t7 20v/v bdga 5 ld sot-23 p5.064a isl28006fh20z-t7a 20v/v bdga 5 ld sot-23 p5.064a isl28006fhadjz-t7 adj bdfa 6 ld sot-23 p6.064 isl28006fhadjz-t7a adj bdfa 6 ld sot-23 p6.064 isl28006fh-100eval1z 100v/v evaluation board isl28006fh-50eval1z 50v/v evaluation board isl28006fh-20eval1z 20v/v evaluation board isl28006fh-adjeval1z adjustable evaluation board notes: 1. please refer to tb347 for details on reel specifications. 2. these intersil pb-free plastic packaged products employ spec ial pb-free material sets, molding compounds/die attach materials , and 100% matte tin plate plus anneal (e3 termination finish , which is rohs compliant and compatible wi th both snpb and pb-free soldering opera tions). intersil pb-free products are msl classified at pb-fr ee peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jed ec j std-020. 3. for moisture sensitivity level (msl), please see device information page for isl28006 . for more information on msl please see techbrief tb363 . 4. the part marking is located on the bottom of the part. isl28006 4 fn6548.5 may 23, 2011 absolute maximum rating s thermal information max supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28v max differential input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20ma max differential input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5v max input voltage (r s+ , r s- , fb) . . . . . . . . . . . . . . . . . . . gnd - 0.5v to 30v max input current for input voltage isl28006 6 fn6548.5 may 23, 2011 i s gain = 100 v rs + > 2v, v sense = 5mv 50 59 a 62 a gain = 50, 20, v rs + > 2v, v sense = 5mv 50 62 a 63 a adj gain = 21 r f = 100k ? , r g = 5k ? v rs + > 2v, v sense = 5mv 50 62 a 63 a v cc supply voltage guaranteed by psrr 2.7 28 v slew rate gain = 100 pulse on r s+ pin, v out = 8v p-p (figure 67) 0.58 0.76 v/s gain = 50 pulse on r s+ pin, v out = 8v p-p (figure 67) 0.58 0.67 v/s gain = 20 pulse on r s+ pin, v out = 3.5v p-p (figure 67) 0.50 0.67 v/s adj gain = 21 r f = 100k ? , r g = 5k ? pulse on r s+ pin, v out = 3.5v p-p (figure 67) 0.50 0.67 v/s bw -3db gain = 100 v rs + = 12v, 0.1v, v sense = 100mv 110 khz gain = 50 v rs + = 12v, 0.1v, v sense = 100mv 160 khz gain = 20 v rs + = 12v, 0.1v, v sense = 100mv 180 khz adj, gain = 101 (figure 59) v rs + = 12v, 0.1v, v sense = 100mv, r f = 100k ? , r g =1k ? 40 khz adj, gain = 51 (figure 59) v rs + = 12v, v sense = 100mv, r f = 100k ? , r g = 2k ? 78 khz v rs + = 0.1v, v sense = 100mv, r f = 100k ? , r g = 2k ? 122 khz adj, gain = 21 (figure 59) v rs + = 12v, v sense = 100mv, r f = 100k ? , r g = 5k ? 131 khz v rs + = 0.1v, v sense = 100mv, r f = 100k ? , r g = 5k ? 237 khz t s output settling time to 1% of final value v cc = v rs + = 12v, v out =10v step, v sense > 7mv 15 s v cc = v rs + = 0.2v, v out = 10v step, v sense > 7mv 20 s capacitive-load stability no sustained oscillations 300 pf t s power-up power-up time to 1% of final value v cc = v rs + = 12v, v sense = 100mv 15 s v cc = 12v, v rs + = 0.2v, v sense = 100mv 50 s saturation recovery time v cc = v rs + = 12v, v sense = 100mv, overdrive 10 s notes: 7. compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. 8. definition of terms: ? v sense a = v sense @ 100mv ? v sense b = v sense @ 20mv ? v out a = v out @ v sense a = 100mv ? v out b = v out @ v sense b = 20mv ? g = 9. v os is extrapolated from the gain measurement. 10. % gain accuracy = g a = 11. output accuracy % voa = , where v out = v sense x gain and v sense = 100mv electrical specifications v cc = 12v, v rs+ = 0v to 28v, v sense = 0v, r load = 1m ? , t a = +25c unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. temperature data established by characterization . (continued) parameter description conditions min (note 7) typ max (note 7) unit gain v out av out b ? v sense av sense b ? ----------------------------------------------------- - ?? ?? ?? = v os v sense a v out a g ---------------- - ? = g measured g expected ? g expected -------------------------------------------------------------------- - ?? ?? ?? 100 vout measured vout expected ? vout expected ------------------------------------------------------------------------------------------- ?? ?? ?? 100 isl28006 7 fn6548.5 may 23, 2011 typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. figure 3. high-side and low-side threshold voltage v rs+(l-h) and v rs+(h-l) , v sense = 10mv figure 4. v out vs v rs+ , v sense = 20mv transient response figure 5. large signal transient response v rs+ = 0.2v, v sense = 100mv figure 6. large signal transient response v rs+ = 12v, v sense = 100mv figure 7. v os (v) distribution at +25c, v rs+ =12v, quantity: 100 figure 8. v os vs v rs+ 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 time (ms) volts (v) v th(l-h) = 1.52v v th(h-l) = 1.23v v rs+ g100, v out = 1v g50, v out = 500mv g20, v out = 200mv v out (g = 100) 0 0.4 0.8 1.2 1.6 2.0 2.4 0 0.20.40.60.81.01.21.41.61.82.0 time (ms) v rs+ (v) 0 2 4 6 8 10 12 v out (v) r l = 1m ? vcc = 12v v rs+ g100, v out = 2v g50, v out = 1v g20, v out = 400mv v out (g = 100) 0 2 4 6 8 10 12 0 102030405060708090100 time (s) v out (v) gain 100 0 2 4 6 8 10 12 0 102030405060708090100 time (s) v out (v) gain 100 v os (v) units 0 2 4 6 8 10 12 14 16 18 20 -250 -200 -150 -100 -50 0 50 100 gain 100 v sense = 20mv, 100mv 0 2 4 6 8 10121416182022242628 v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 +25c -40c +125c +100c gain 100 v sense = 20mv, 100mv isl28006 8 fn6548.5 may 23, 2011 figure 9. v os vs v rs+ figure 10. v os vs v cc , v rs+ = 12v figure 11. v os vs v cc , v rs+ = 0.1v figure 12. gain accuracy vs v rs+ = 0v to 28v figure 13. gain accuracy vs v rs+ = 0v to 2v figure 14. gain accuracy vs v cc , v rs+ = 12v typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 0 0.20.40.60.8 1.0 1.2 1.4 1.6 1.8 2.0 +25c -40c +125c +100c gain 100 v sense = 20mv, 100mv -250 -200 -150 -100 -50 0 50 100 150 200 250 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v cc (v) v os (v) +25c -40c +125c +100c gain 100 v sense = 2mv, 20mv -3000 -2000 -1000 0 1000 2000 3000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v cc (v) v os (v) +125c +100c +25c -40c gain 100 v sense = 2mv, 20mv 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 v rs+ (v) +100c +25c -40c +125c gain 100 v sense = 20mv, 100mv v rs+ (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 +100c +25c -40c +125c gain 100 v sense = 20mv, 100mv accuracy (%) v cc (v) -5 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 2 4 6 8 10121416182022242628 +100c +25c -40c +125c gain 100 v sense = 2mv, 20mv isl28006 9 fn6548.5 may 23, 2011 figure 15. gain accuracy vs v cc , v rs+ = 0.1v figure 16. normalized v oa vs i out figure 17. gain vs frequency v rs+ = 100mv/12v, v sense = 100mv, v out = 50mv p-p figure 18. v os (v) vs temperature figure 19. gain accuracy (%) vs temperature figure 20. v out error (%) vs temperature typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v cc (v) accuracy (%) -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +125c +25c -40c +100c gain 100 v sense = 2mv, 20mv 1 10 100 1m 10m i out (a) v oa percent accuracy (%) -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 +100c +25c -40c +125c gain 100 10 100 1k 10k 100k 1m frequency (hz) gain (db) -35 -25 -15 -5 5 15 25 35 45 gain 100 v cc = 12v a v = 100 r l = 1m ? v sense = 100mv v rs+ = 12v v rs+ = 100mv -100 -80 -60 -40 -20 0 20 40 -50 -25 0 25 50 75 100 125 temperature (c) v os (v) gain 100 v sense = 20mv, 100mv v rs+ = 12v -0.10 -0.05 0 0.05 0.10 0.15 0.20 0.25 0.30 -50-25 0 255075100125 temperature (c) gain accuracy (%) gain 100 v sense = 20mv, 100mv v rs+ = 12v -1 -0.9 -0.8 -0.7 -0.6 -0.5 -50 -25 0 25 50 75 100 125 temperature (c) v out error (%) gain 100 v rs+ = 12v isl28006 10 fn6548.5 may 23, 2011 figure 21. v os (v) distribution at +25c, v rs+ = 12v, quantity: 100 figure 22. v os vs v rs+ figure 23. v os vs v rs+ figure 24. v os vs v cc , v rs+ = 12v figure 25. v os vs v cc , v rs+ = v rs+ = 0.1v figure 26. gain accuracy vs v rs+ = 0v to 28v typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v os (v) units 0 2 4 6 8 10 12 14 16 18 20 -250 -200 -150 -100 -50 0 50 100 gain 50 v sense = 20mv, 100mv 0 2 4 6 8 10121416182022242628 v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 +25c -40c +125c +100c gain 50 v sense = 20mv, 100mv v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 0 0.20.40.60.8 1.01.21.41.61.82.0 +25c -40c +125c +100c gain 50 v sense = 20mv, 100mv -250 -200 -150 -100 -50 0 50 100 150 200 250 2 4 6 8 10121416182022242628 v cc (v) v os (v) +25c -40c +125c +100c gain 50 v sense = 2mv, 0mv -3000 -2000 -1000 0 1000 2000 3000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v cc (v) v os (v) +125c +100c +25c -40c gain 50 v sense = 2mv, 0mv +100c +25c -40c +125c 0246810121416182022242628 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 v rs+ (v) gain 50 v sense = 20mv, 100mv isl28006 11 fn6548.5 may 23, 2011 figure 27. gain accuracy vs v rs+ = 0v to 2v figure 28. gain accuracy vs v cc , high-side figure 29. gain accuracy vs v cc , low-side figure 30. normalized v oa vs i out figure 31. gain vs frequency v rs+ = 100mv/12v, v sense = 100mv, v out = 50mv p-p figure 32. v os (v) vs temperature typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v rs+ (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 +100c +25c -40c +125c gain 50 v sense = 20mv, 100mv accuracy (%) v cc (v) -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 2 4 6 8 10121416182022242628 +100c +25c -40c +125c gain 50 v sense = 2mv, 20mv v cc (v) accuracy (%) -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +125c +25c -40c +100c gain 50 v sense = 2mv, 20mv 1 10 100 1m 10m i out (a) v oa percent accuracy (%) -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 +100c +25c -40c +125c gain 50 10 100 1k 10k 100k 1m frequency (hz) gain (db) -35 -25 -15 -5 5 15 25 35 45 v cc = 12v a v = 100 r l = 1m ? v sense = 100mv v rs+ = 12v v rs+ = 100mv gain 50 temperature (c) v os (v) -230 -210 -190 -170 -150 -130 -110 -90 -70 -50 -25 0 25 50 75 100 125 gain 50 v sense = 20mv, 100mv v rs+ = 12v isl28006 12 fn6548.5 may 23, 2011 figure 33. gain accuracy (%) vs temperature figure 34. v out error (%) vs temperature figure 35. v os (v) distribution at +25c, v rs+ = 12v, quantity: 100 figure 36. v os vs v rs+ figure 37. v os vs v rs+ figure 38. v os vs v cc , v rs+ = 12v typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) -50-25 0 255075100125 temperature (c) gain accuracy (%) 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 gain 50 v sense = 20mv, 100mv v rs+ = 12v -50 -25 0 25 50 75 100 125 temperature (c) v out error (%) -0.12 -0.10 -0.08 -0.06 -0.04 -0.02 0 0.02 0.04 0.06 0.08 0.10 gain 50 v rs+ = 12v v os (v) units 0 5 10 15 20 25 30 -250 -200 -150 -100 -50 0 50 100 150 gain 20 v sense = 20mv, 100mv 0 2 4 6 8 10121416182022242628 v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 +25c -40c +125c +100c gain 20 v sense = 20mv, 100mv v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 0 0.2 0.4 0.6 0.8 11.21.41.61.82 +25c -40c +125c +100c gain 20 v sense = 20mv, 100mv -250 -200 -150 -100 -50 0 50 100 150 200 250 246810121416182022242628 v cc (v) v os (v) +25c -40c +125c +100c gain 20 v sense = 2mv, 20mv isl28006 13 fn6548.5 may 23, 2011 figure 39. v os vs v cc , v rs+ = 0.1v figure 40. gain accuracy vs v rs+ = 0v to 28v figure 41. gain accuracy vs v rs+ = 0v to 2v figure 42. gain accuracy vs v cc , high-side figure 43. gain accuracy vs v cc , low-side figure 44. normalized v oa vs i out typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) -3000 -2000 -1000 0 1000 2000 3000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v cc (v) v os (v) +125c +100c +25c -40c gain 20 v sense = 2mv, 20mv 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 v rs+ (v) +100c +25c -40c +125c gain 20 v sense = 20mv, 100mv v rs+ (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 +100c +25c -40c +125c gain 20 v sense = 20mv, 100mv accuracy (%) v cc (v) -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +100c +25c -40c +125c gain 20 v sense = 2mv, 20mv v cc (v) accuracy (%) -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +125c -40c +100c +25c gain 20 v sense = 2mv, 20mv 1 10 100 1m 10m i out (a) v oa percent accuracy (%) -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 gain 20 +100c +25c -40c +125c isl28006 14 fn6548.5 may 23, 2011 figure 45. gain vs frequency v rs+ = 100mv/12v, v sense = 100mv, v out = 50mv p-p figure 46. v os (v) vs temperature figure 47. gain accuracy (%) vs temperature figure 48. v out error (%) vs temperature figure 49. v os (v) distribution at +25c, v rs+ = 12v, quantity: 100 figure 50. v os vs v rs+ typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) 10 100 1k 10k 100k 1m frequency (hz) gain (db) -35 -25 -15 -5 5 15 25 35 45 v cc = 12v a v = 100 r l = 1m ? v sense = 100mv v rs+ = 12v gain 20 v rs+ = 100mv temperature (c) v os (v) -50 -25 0 25 50 75 100 125 -140 -120 -100 -80 -60 -40 -20 gain 20 v sense = 20mv, 100mv v rs+ = 12v 0.290 0.295 0.300 0.305 0.310 0.3150 0.320 0.325 0.330 -50 -25 0 25 50 75 100 125 temperature (c) gain accuracy (%) gain 20 v sense = 20mv, 100mv v rs+ = 12v -50 -25 0 25 50 75 100 125 temperature (c) v out error (%) 0.15 0.17 0.19 0.21 0.23 0.25 0.27 0.29 0.31 gain 20 v rs+ = 12v -200 -160 -120 -80 -40 0 40 80 120 160 200 v os (v) units 0 2 4 6 8 10 12 14 16 18 20 22 24 26 gain 101 adj r f = 100k, r g = 1k v sense = 20mv, 100mv 0 2 4 6 8 10121416182022242628 v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 +25c -40c +125c +100c gain 101 adj r f = 100k, r g = 1k v sense = 20mv, 100mv isl28006 15 fn6548.5 may 23, 2011 figure 51. v os vs v rs+ figure 52. v os vs v cc , high-side figure 53. v os vs v cc , low-side figure 54. gain accuracy vs v rs+ = 0v to 28v figure 55. gain accuracy vs v rs+ = 0v to 2v figure 56. gain accuracy vs v cc , v rs+ = 12v typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v rs+ (v) v os (v) -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 +25c -40c +125c +100c gain 101 adj r f = 100k, r g = 1k v sense = 20mv, 100mv -250 -200 -150 -100 -50 0 50 100 150 200 250 2 4 6 8 10121416182022242628 v cc (v) v os (v) +25c -40c +125c +100c gain 101 adj r f = 100k, r g = 1k v sense = 2mv, 20mv -3000 -2000 -1000 0 1000 2000 3000 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v cc (v) v os (v) +125c +100c +25c -40c gain 101 adj r f = 100k, r g = 1k v sense = 2mv, 20mv 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 +100c +25c -40c +125c v rs+ (v) gain 101 adj r f = 100k, r g = 1k v sense = 20mv, 100mv v rs+ (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 accuracy (%) -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 +100c +25c -40c +125c gain 101 adj r f = 100k, r g = 1k v sense = 20mv, 100mv accuracy (%) v cc (v) -5.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +100c +25c -40c +125c gain 101 adj r f = 100k, r g = 1k v sense = 2mv, 20mv isl28006 16 fn6548.5 may 23, 2011 figure 57. gain accuracy vs v cc , v rs+ = 0.1v figure 58. normalized v oa vs i out figure 59. gain vs frequency v rs+ = 100mv/12v, v sense = 100mv, v out = 50mv p-p figure 60. v os (v) vs temperature figure 61. gain accuracy (%) vs temperature figure 62. v out error (%) vs temperature typical performance curves v cc = 12v, r l = 1m ? , unless otherwise specified. (continued) v cc (v) accuracy (%) -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +125c +100c +25c -40c gain 101 adj r f = 100k, r g = 1k v sense = 2mv, 20mv -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 1 10 100 1m 10m i out (a) v oa percent accuracy (%) -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 +100c -40c gain 21 adj r f = 100k r g = 5k +125c gain 101 adj r f = 100k r g = 1k +25c +100c -40c +125c +25c 100 1k 10k 100k 1m frequency (hz) gain (db) 0 5 10 15 20 25 30 35 40 45 v cc = 12v gain = 21, 51, 101 r l = 1m ? v sense = 100mv r f = 100k r g = 1k, 2k, 5k v rs+ = 12v gain = 21 v rs+ = 0.1v gain = 101 v rs+ = 12v gain = 51 v rs+ = 0.1v gain = 21 v rs+ = 12v gain = 51 v rs+ = 12v gain = 101 temperature (c) v os (v) -50 -25 0 25 50 75 100 125 -350 -300 -250 -200 -150 -100 -50 0 50 100 150 200 v rs+ = 12v gain = 21, 101 r l = 1m ? v sense = 20mv, 100mv r f = 100k r g = 1k, 5k gain = 21 gain = 101 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 -50 -25 0 25 50 75 100 125 temperature (c) gain accuracy (%) v rs+ = 12v gain = 21, 101 r l = 1m ? v sense = 20mv, 100mv r f = 100k r g = 1k, 5k gain = 21 gain = 101 -50 -25 0 25 50 75 100 125 temperature (c) v out error (%) -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 v rs+ = 12v gain = 21, 101 r l = 1m ? v sense = 20mv, 100mv r f = 100k r g = 1k, 5k gain = 21 gain = 101 isl28006 17 fn6548.5 may 23, 2011 applications information functional description the isl28006-20, isl28006-50 and isl28006-100 are single supply, uni-directional current sense amplifiers with fixed gains of 20v/v, 50v/v and 100v/v re spectively. the isl28006-adj is single supply, uni-directional current sense amplifier with an adjustable gain via external resistors (see figure 72). the isl28006-adj is stable for gains of 20 and higher. the isl28006 is a 2-stage amplifier. figure 68 shows the active circuitry for high-side current sense applications where the sense voltage is between 1.35v to 28v. figure 69 shows the active circuitry for ground sense applicat ions where the sense voltage is between 0v to 1.35v. the first stage is a bi-level trans-conductance amp and level translator. the gm stage converts the low voltage drop (v sense ) sensed across an external milli-ohm sense resistor, to a current (@ gm = 21.3a/v). the trans- conductance amplifier forces a current through r 1 resulting to a voltage drop across r 1 that is equal to the sense voltage (v sense ). the current through r 1 is mirrored across r 5 creating a ground-referenced voltage at the input of the second amplifier equal to v sense . the second stage is responsible for the overall gain and frequency response performance of the device. the fixed gains (20, 50, 100) are set with internal resistors r f and r g . the variable gain (adj) has an additional fb pin and uses external gain resistors to set the gain of the output. for the fixed gain amps the only external component needed is a current sense resistor (typically 0.001 ? to 0.01 ? , 1w to 2w). the transfer function for the fixed gain parts is given in equation 1. the transfer function for the adju stable gain part is given in equation 2. the input gm stage derives its ~2. 86a supply current from the input source through the r s+ terminal as long as the sensed voltage at the r s+ pin is >1.35v and the gm hi amplifier is selected. when the sense voltage at r s+ drops below the 1.35v threshold, the gm lo amplifier kicks in and the gm lo output current reverses, flowing out of the r s- pin. test circuits and waveforms figure 63. i s, v os , v oa , cmrr, psrr, gain accuracy figure 64. input bias current, leakage current figure 65. t s , saturation recovery time figure 66. gain vs frequency figure 67. slew rate r s+ v cc r s- v out out r l gnd v sense v rs+ 1m ? + - + - r s+ v cc r s- v out out r l gnd v sense v rs+ 1m ? + - + - r 1 r 2 v r1 v r 2 r s+ v cc r s- v out out r l gnd v rs- v rs+ 1m ? pulse generator r s+ v cc r s- v out out r l gnd v sense v rs+ 1m ? signal generator r s+ v cc r s- v out out r l gnd v rs+ 1m ? pulse generator v out gain i s r s v os + () = (eq. 1) v out 1 r f r g ------ - + ?? ?? ?? i s r s v os + () = (eq. 2) isl28006 18 fn6548.5 may 23, 2011 r s+ r s- gm hi gm lo r s i s + - load v sense 1.35v i mirror + - out r f r g r 1 r 5 v cc adj option only high-side sensing optional transient protection optional filter capacitor ?v sense v cc = 2v to 28v r 2 r 3 r 4 figure 68. high-side current detection i = 2.86a gnd v sense v rs+ = 2v to 28v f b r s- gm hi gm lo r s i s + - load v sense 1.35v i mirror + - out r f r g r 1 r 5 v cc adj option only low-side sensing optional transient protection optional filter capacitor ?v sense v cc = 2v to 28v r 2 r 3 r 4 figure 69. low-side current detection i = 2.86a v cc gnd v sense v rs+ = 0v to 2v f b r s+ isl28006 19 fn6548.5 may 23, 2011 hysteretic comparator the input trans-conductance amps are under control of a hysteretic comparator operatin g from the incoming source voltage on the r s+ pin (figure 68). the comparator monitors the voltage on r s+ and switches the sense amplifier from the low-side gm amp to the high-side gm amplifier whenever the input voltage at r s+ increases above the 1.35v threshold. conversely, a decreasing voltage on the r s+ pin, causes the hysteric comparator to switch from the high-side gm amp to the low-side gm amp as the voltage decreases below 1.35v. it is that low-side sense gm amplifier that gives the isl28006 the proprietary ability to sense current all the way to 0v. negative voltages on the r s+ or r s- are beyond the sensing voltage range of this amplifier. typical application circuit figure 72 shows the basic app lication circuit and optional protection components for switched-load applications. for applications where the load and the power source is permanently connected, only an external se nse resistor is needed. for applications where fast transients are caused by hot plugging the source or load, external protec tion components may be needed. the external current limiting resistor (r p ) in figure 72 may be required to limit the peak current through the internal esd diodes to <20ma. this condition can occur in applications that experience high levels of in-rush current causing high peak voltages that can damage th e internal esd diodes. an r p resistor value of 100 ? will provide protection for a 2v transient with the maximum of 20ma flowing through the input while adding only an additional 13v (worse case over-temperature) of v os . refer to equation 3: switching applications can generate voltage spikes that can overdrive the amplifier input and dr ive the output of the amplifier into the rails, resulting in a long overload recover time. capacitors c m and c d filter the common mode and differential voltage spikes. error sources there are 3 dominant error sources: gain error, input offset voltage error and kelvin voltage error (see figure 71). the gain error is dominated by the internal resistance matching tolerances. the remaining errors appear as sense voltage errors at the input to the amplifier. they are v os of the amplifier and kelvin voltage errors. if the transient protection resistor is added, an additional v os error can result from the ixr voltage due to input bias current. the limiting re sistor should only be added to the r s- input, due to the high-side gm amplifier (gm hi ) sinking several micro amps of current through the r s+ pin. layout guidelines the kelvin connected sense resistor the source of kelvin voltage errors is illustrated in figure 71. the resistance of 1/2 oz copper is ~1m ? per square with a tc of ~3900ppm/c (0.39%/c). when you compare this unwanted parasitic resistance with the total 1m ? to 10m ? resistance of the sense resistor, it is easy to see why the sense connection must be chosen very carefully. for example, consider a maximum current of 20a through a 0.005 ? sense resistor, generating a v sense = 0.1 and a full scale output voltage of 10v (g = 100). two side contacts of only 0.25 square per contact puts the v sense input about 0.5 x 1m ? away from the resistor end capacitor. if only 10a the 20a total current flows through the kelvin path to the resistor, you get an error voltage of 10mv (10a x 0.5sq x 0.001 ? /sq. = 10mv) added to the 100mv sense voltage for a sense voltage error of 10% (0.110v-0.1)/0.1v) x 100. figure 70. gain accuracy vs v rs+ = 0v to 2v v rs+ (v) -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0 0.20.40.60.81.01.21.41.61.82.0 accuracy (%) (eq. 3) r p i rs- () 100 130na () 13 v == () figure 71. pc board current sense kelvin connection pc board non-uniform current flow current sense resistor 1 to 10mo current in current out kelvin v s contacts copper trace 30mo/sq. pc board non-uniform current flow current sense resistor 1 to 10mo current in current out kelvin v s contacts copper trace 30mo/sq. current sense resistor 1m ? to 10m ? 1m ? /sq current out current in non-uniform current flow pc board kelvin v s contacts 1/2 oz copper trace isl28006 20 fn6548.5 may 23, 2011 overall accuracy (v oa %) v oa is defined as the total output accuracy referred-to-output (rto). the output accuracy contains all offset and gain errors, at a single output voltage. equation 4 is used to calculate the % total output accuracy. where v out actual = v sense x gain example: gain = 100, for 100mv v sense input we measure 10.1v. the overall accuracy (v oa ) is 1% as shown in equation 5. power dissipation it is possible to exceed the +150c maximum junction temperatures under certain load and power supply conditions. it is therefore important to ca lculate the maximum junction temperature (t jmax ) for all applications to determine if power supply voltages, load conditions , or package type need to be modified to remain in the safe operating area. these parameters are related using equation 6: where: ?p dmaxtotal is the sum of the maximum power dissipation of each amplifier in the package (pd max ) ?pd max for each amplifier can be calculated using equation 7: where: ?t max = maximum ambient temperature ? ja = thermal resistance of the package ?pd max = maximum power dissipation of 1 amplifier ?v cc = total supply voltage ?i qmax = maximum quiescent suppl y current of 1 amplifier ?v outmax = maximum output voltage swing of the application ?r l = load resistance figure 72. typical application circuit gm hi gm lo 1.35v + - v cc adj option only i = 2.86a gnd r s r s- r p (1m ? to 0.1 ? ) 0.1vdc to 28vdc + - c d load c m 2.7vdc to 28vdc r s+ f b out fixed gain option only v oa 100 v out actual v out ected exp ? v out ected exp ----------------------------------------------------------------------------- - ?? ?? ?? = (eq. 4) (eq. 5) v oa 100 10.1 10 ? 10 ------------------------ - ?? ?? 1% == t jmax t max ja xpd maxtotal + = (eq. 6) pd max v s i qmax v s ( - v outmax ) v outmax r l ------------------------ + = (eq. 7) isl28006 21 fn6548.5 may 23, 2011 revision history the revision history provided is for informat ional purposes only and is believed to be accurate, but not warranted. please go t o web to make sure you have the latest rev. date revision change 4/12/11 fn6548.5 converted to new template page 1 - changed headings for ?typical applic ation? and ?gain accuracy vs vrs+ = 0v to 28v? to figure titles (figures 1 and 2). page 1 - updated intersil trademark statement at bottom of page 1 per directive from legal. page 7 - updated over temp note in min max column of spec tables from "parameters with mi n and/or max limits are 100% tested at +25c, unless otherwise specified. temperature limi ts established by characterization and are not production tested." to new standard "compliance to datasheet limits is assu red by one or more methods: production test, characterization and/or design." page 19 - figure 69, low side current detection schematic: moved the load from the ground side of the power side circuit to the high side. 9/2/10 fn6548.4 added -t7a tape and reel options to ordering information table for all packages. 5/12/10 fn6548.3 added note 4 to part marking column in ?ordering information? on page 3. corrected hyperlinks in notes 1 and 3 in ?ordering information? on page 3. 4/8/10 removed ?coming soon? from evaluation boards in ?ordering information? on page 3. 4/7/10 added ?related literature? on page 1 updated package drawing number in the ?ordering information? on page 3 for the 20v, 50v and 100v options from mdp0038 to p50.64a. revised package outline drawing from mdp0038 to p5.064a on page 24. mdp0038 package contained 2 packages for both the 5 and 6 ld sot-23. mdp0038 was obsoleted and the packages were separated and made into 2 separate package outline drawings; p5.064a and p6.064a. changes to the 5 ld sot-23 were to move dimensions from table onto drawing, add land pattern and add jedec reference number. 3/10/10 fn6548.2 releasing adjustable gain option. added adjustable block diagram (page 2), added adjustable gain li mits to electrical spec table, added figures 47 through 60, added +85c curves to figures 6 thru 14, 20 thru 28, 34 thru 42, and figures 48 thru 56. modified figure 70. 2/4/10 fn6548.1 -page 1: edited last sentence of paragraph 2. moved order of gain listings from 20, 50, 100 to 100, 50, 20 in the 3rd paragraph. under features ....removed "low input offset voltage 250v, max" under features .... moved order of parts listing from 20, 50, 100 (from top to bottom) to 100, 50, 20. -page 3: removed coming soon on isl28006fh50z and isl28006fh 20z and changes the order or listing them to 100, 50, 20. -page 5: voa test. under conditions column ...d eleted 20mv to. it now reads ... vsense = 100mv sr test. under conditions column ..deleted what was there. it now reads ... pulse on rs+pin, see figure 51 -page 6: ts test. removed gain = 100 and gain = 100v/v in both description and conditions columns respectively. -page 9: added vrs+= 12v to figures 16, 17, 18. -page 11: added vrs+= 12v to figures 30, 31, 32. -page 13 & 14: added vrs+= 12v to figures 44, 45, 46. -page 14 added figure 51 and adjusted figure numbers to account for the added figure. -figs 8, 26, and 40 change "high side" to "vrs = 12v", where rs is subscript. -figs 9, 27, and 41 change "low side" to "vrs = 0.1v", where rs is subscript. 12/14/09 fn6548.0 initial release isl28006 22 intersil products are manufactured, assembled and tested utilizing iso9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnished by intersil is believed to be accurate and reliable. however, no responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents 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 i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn6548.5 may 23, 2011 for additional products, see www.intersil.com/product_tree products intersil corporation is a leader in the design and manufacture of high-performance analog semico nductors. the company's product s address some of the industry's fastest growing markets, such as , flat panel displays, cell phones, handheld products, and noteb ooks. intersil's product families address power management and analog signal processing functions. go to www.intersil.com/products for a complete list of intersil product families. *for a complete listing of applications, related documentation an d related parts, please see the respective device information page on intersil.com: isl28006 to report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff fits are available from our website at http://rel.intersil.com/reports/search.php isl28006 23 fn6548.5 may 23, 2011 package outline drawing p5.064a 5 lead small outline transistor plastic package rev 0, 2/10 dimension is exclusive of mold flash, protrusions or gate burrs. this dimension is measured at datum ?h?. package conforms to jedec mo-178aa. foot length is measured at reference to guage plane. dimensions in ( ) for reference only. dimensioning and tolerancing conform to asme y14.5m-1994. 6. 3. 5. 4. 2. dimensions are in millimeters. 1. notes: detail "x" side view typical recommended land pattern top view index area pin 1 seating plane gauge 0.450.1 (2 plcs) 10 typ 4 1.90 0.40 0.05 2.90 0.95 1.60 2.80 0.05-0.15 1.14 0.15 0.20 c a-b d m (1.20) (0.60) (0.95) (2.40) 0.10 c 0.08-0.20 see detail x 1.45 max (0.60) 0-3 c b a d 3 3 3 0.20 c (1.90) 2x 0.15 c 2x d 0.15 c 2x a-b (0.25) h 5 2 4 5 5 end view plane isl28006 24 fn6548.5 may 23, 2011 package outline drawing p6.064 6 lead small outline transistor plastic package rev 4, 2/10 dimension is exclusive of mold flash, protrusions or gate burrs. package conforms to jedec mo-178ab. foot length is measured at reference to guage plane. dimensions in ( ) for reference only. dimensioning and tolerancing conform to asme y14.5m-1994. 5. 3. 4. 2. dimensions are in millimeters. 1. notes: detail "x" side view typical recommended land pattern top view end view index area pin 1 seating plane gauge 0.450.1 (2 plcs) 10 typ 4 1.90 0.40 0.10 2.90 0.10 0.95 1.60 +0.15/-0.10 2.80 0.00-0.15 1.15 +0.15/-0.25 0.20 c a-b d m (1.20) (0.60) (0.95) (2.40) 0.10 c 0.08-0.22 see detail x (0.25) 1.45 max (0.60) 0-8 c b a d 3 3 3 3 0.20 c 2x 123 654 plane |
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