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1 precision, low noise fga? voltage references with disable isl21060 the isl21060 fga? voltage references are low power, high precision voltage references fabricated on intersil?s proprietary floating gate analog technology . a new disable feature allows the device to shut down the ou tput and reduce supply current drain from 15a operating to <500na. the isl21060 family features gu aranteed initial accuracy as low as 1.0mv with drift down to 10ppm/c. noise is typically 10v p-p (10hz bw). this combination of high initial accuracy, low power and low output noise performance of the isl21060 enables versatile high performanc e control and data acquisition applications with low power consumption. pin configuration isl21060 (6 ld sot-23) top view features ? reference output voltage . . . . . . . . . . . . . . . . 2.048v, 2.500v, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.000v, 3.300v, 4.096v ? initial accuracy . . . . . . . . . . . . . . . . . . . . . . . . 1.0mv, 2.5mv ? input voltage range - isl21060-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5v to 5.5v - isl21060-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7v to 5.5v - isl21060-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2v to 5.5v - isl21060-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5v to 5.5v - isl21060-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3v to 5.5v ? output voltage noise . . . . . . . . . . . . . 10v p-p (0.1hz to 10hz) ? supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40a (max) ? tempco . . . . . . . . . . . . . . . . . . . . . . . . 10ppm/c, 25ppm/c ? output current capability . . . . . . . . . . . . . . . . +10.0ma/-5ma ? operating temperature range. . . . . . . . . . . .-40c to +125c ? package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ld sot-23 ? pb-free (rohs compliant) applications ? high resolution a/ds and d/as ? digital meters ? bar code scanners ?basestations ? battery management/monitoring ? industrial/instrumentation equipment related literature ? an1835 ?isl21060eval1z user?s guide? pin descriptions pin # pin name description 1 nc no connect; do not connect or connect to ground 2 gnd ground connection 3 en enable input. active high. do not float. 4 vin input voltage connection 5 vouts voltage reference output connection (sense) 6 voutf voltage reference output connection (force) vouts 5 voutf vin nc gnd en 1 2 3 4 6 december 19, 2013 fn6706.6 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas llc 2008, 2009, 2013. all rights reserved intersil (and design) and fga are trademarks owned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners.
isl21060 2 fn6706.6 december 19, 2013 ordering information part number (notes 1, 2, 3) part marking v out option (v) grade (mv) temp. range (ppm/c) package (pb-free) pkg. dwg. # isl21060bfh620z-tk gacb (note 4) 2.048 1.0 10 6 ld sot-23 p6.064a isl21060cfh620z-tk gacd (note 4) 2.048 2.5 25 6 ld sot-23 p6.064a isl21060bfh625z-tk gaea (note 4) 2.500 1.0 10 6 ld sot-23 p6.064a isl21060cfh625z-tk gaga (note 4) 2.500 2.5 25 6 ld sot-23 p6.064a ISL21060BFH630z-tk gaha (note 4) 3.000 1.0 10 6 ld sot-23 p6.064a isl21060cfh630z-tk gaja (note 4) 3.000 2.5 25 6 ld sot-23 p6.064a isl21060cfh633z-tk gapa (note 4) 3.300 2.5 25 6 ld sot-23 p6.064a isl21060bfh641z-tk gacc (note 4) 4.096 1.0 10 6 ld sot-23 p6.064a isl21060cfh641z-tk gace (note 4) 4.096 2.5 25 6 ld sot-23 p6.064a 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 isl21060bfh620 , isl21060bfh625 , ISL21060BFH630 , isl21060bfh641 , isl21060cfh620 , isl21060cfh625 , isl21060cfh630 , isl21060cfh633 , isl21060cfh641 . for more information on msl, please see tech brief tb363 . 4. the part marking is located on the bottom of the part.
isl21060 3 fn6706.6 december 19, 2013 absolute voltage ratings thermal information max voltage v in to gnd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to +6.5v v out to gnd (10s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to v out + 1v voltage on ?dnc? pins . . . . . . . . . .no connections permitted to these pins esd rating human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5500v machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550v charged device model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kv recommended operating conditions temperature range (industrial) . . . . . . . . . . . . . . . . . . . . .-40c to +125c thermal resistance (typical) ja (c/w) 6 ld sot-23 (note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 continuous power dissipation (t a = +70c, note 7) storage temperature range. . . . . . . . . . . . . . . . . . . . . . . .-65c to +150c 6 ld sot-23, derate 5.88mw/c above +70c . . . . . . . . . . . . . . . 471mw pb-free reflow profile (note 6) . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/ pbfree/pb-freereflow.asp caution: do not operate at or near the maximum ratings listed for extended periods of time. exposure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. important note: all parameters having min/max specifications ar e guaranteed. typ values are for information purposes only. unle ss otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: t j = t c = t a note: 5. ja is measured with the component mounted on a high effective thermal conductivity test board in free air. see tech brief tb379 for details. 6. post-reflow drift for the isl21060 devices will range from 100 v to 1.0mv based on experimental results with devices tested in sockets and also on fr4 multi-layer pc boards. the design engineer must take this into account when considering the reference voltage after assembl y. electrical specifications (isl21060-20, v out = 2.048v) v in = 3.0v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. parameter description conditions min (note 10) typ max (note 10) unit v out output voltage 2.048 v v oa v out accuracy @ t a = +25c isl21060b20 -1.0 +1.0 mv isl21060c20 -2.5 +2.5 mv tc v out output voltage temperature coefficient (note 7) isl21060b 10 ppm/c isl21060c 25 ppm/c v in input voltage range 2.5 5.5 v i in supply current v en = v in 16 40 a v out / v in line regulation 2.5v < v in < 5.5v 50 150 v/v v out / i out load regulation sourcing: 0ma i out 10ma 3 50 v/ma sinking: -5ma i out 0ma 150 400 v/ma i sc short circuit current t a = +25c, v out tied to gnd 50 ma t r turn-on settling time v out = 0.1% 300 s ripple rejection f = 10khz 75 db e n output voltage noise 0.1hz f 10hz 10 v p-p v n broadband voltage noise 10hz f 1khz 2.5 v rms noise density f = 1khz 60 nv/ hz v out / t a thermal hysteresis (note 8) t a = +165c 100 ppm v out / t long term stability (note 9) t a = +25c 100 ppm output disable v enh enable logic high (on) 1.6 v v enl enable logic low (off) 0.8 v i insd shutdown supply current v en 0.35v 0.4 1.5 a
isl21060 4 fn6706.6 december 19, 2013 electrical specifications (isl21060-25, v out = 2.500v) v in = 3.0v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. parameter description conditions min (note 10) typ max (note 10) unit v out output voltage 2.500 v v oa v out accuracy @ t a = +25c isl21060b25 -1.0 +1.0 mv isl21060c25 -2.5 +2.5 mv tc v out output voltage temperature coefficient (note 7) isl21060b 10 ppm/c isl21060c 25 ppm/c v in input voltage range 2.7 5.5 v i in supply current v en = v in 16 40 a v out / v in line regulation 2.7v < v in < 5.5v 50 150 v/v v out / i out load regulation sourcing: 0ma i out 10ma 3 150 v/ma sinking: -5ma i out 0ma 130 400 v/ma i sc short circuit current t a = +25c, v out tied to gnd 50 ma t r turn-on settling time v out = 0.1% 300 s ripple rejection f = 10khz 75 db e n output voltage noise 0.1hz f 10hz 10 v p-p v n broadband voltage noise 10hz f 1khz 2.5 v rms noise density f = 1khz 60 nv/ hz v out / t a thermal hysteresis (note 8) t a = +165c 100 ppm v out / t long term stability (note 9) t a = +25c 100 ppm output disable v enh enable logic high (on) 1.6 v v enl enable logic low (off) 0.8 v i insd shutdown supply current v en 0.35v 0.4 1.5 a electrical specifications (isl21060-30, v out = 3.000v) v in = 3.5v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. parameter description conditions min (note 10) typ max (note 10) unit v out output voltage 3.000 v v oa v out accuracy @ t a = +25c isl21060b30 -1.0 +1.0 mv isl21060c30 -2.5 +2.5 mv tc v out output voltage temperature coefficient (note 7) isl21060b 10 ppm/c isl21060c 25 ppm/c v in input voltage range 3.2 5.5 v i in supply current v en = v in 16 40 a v out / v in line regulation 3.2v < v in < 5.5v 50 150 v/v v out / i out load regulation sourcing: 0ma i out 10ma 3 50 v/ma sinking: -5ma i out 0ma 130 400 v/ma i sc short circuit current t a = +25c, v out tied to gnd 50 ma t r turn-on settling time v out = 0.1% 300 s
isl21060 5 fn6706.6 december 19, 2013 ripple rejection f = 10khz 75 db e n output voltage noise 0.1hz f 10hz 10 v p-p v n broadband voltage noise 10hz f 1khz 2.5 v rms noise density f = 1khz 60 nv/ hz v out / t a thermal hysteresis (note 8) t a = +165c 100 ppm v out / t long term stability (note 9) t a = +25c 100 ppm output disable v enh enable logic high (on) 1.6 v v enl enable logic low (off) 0.8 v i insd shutdown supply current v en 0.35v 0.4 1.5 a electrical specifications (isl21060-30, v out = 3.000v) v in = 3.5v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. (continued) parameter description conditions min (note 10) typ max (note 10) unit electrical specifications (isl21060-33, v out = 3.300v) v in = 5.0v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. parameter description conditions min (note 10) typ max (note 10) unit v out output voltage 3.300 v v oa v out accuracy @ t a = +25c isl21060c33 -2.5 +2.5 mv tc v out output voltage temperature coefficient (note 7) isl21060c 25 ppm/c v in input voltage range 3.5 5.5 v i in supply current en = v in 18 40 a v out / v in line regulation 3.5v < v in < 5.5v 20 150 v/v v out / i out load regulation sourcing: 0ma i out 10ma 10 50 v/ma sinking: -5ma i out 0ma 120 400 v/ma i sc short circuit current t a = +25c, v out tied to gnd 50 ma t r turn-on settling time v out = 0.1% 300 s ripple rejection f = 10khz 75 db e n output voltage noise 0.1hz f 10hz 10 v p-p v n broadband voltage noise 10hz f 1khz 2.5 v rms noise density f = 1khz 60 nv/ hz v out / t a thermal hysteresis (note 8) t a = +165c 100 ppm v out / t long term stability (note 9) t a = +25c 100 ppm output disable v enh enable logic high (on) 1.6 v v enl enable logic low (off) 0.8 v i insd shutdown supply current v en 0.35v 0.4 1.5 a
isl21060 6 fn6706.6 december 19, 2013 electrical specifications (isl21060-41, v out = 4.096v) v in = 5.0v, t a = -40c to +125c, i out = 0, unless otherwise specified. boldface limits apply across the operating temperature range, -40c to +125c. parameter description conditions min (note 10) typ max (note 10) unit v out output voltage 4.096 v v oa v out accuracy @ t a = +25c isl21060b41 -1.0 +1.0 mv isl21060c41 -2.5 +2.5 mv tc v out output voltage temperature coefficient (note 7) isl21060b 10 ppm/c isl21060c 25 ppm/c v in input voltage range 4.3 5.5 v i in supply current en = v in 20 40 a v out / v in line regulation 4.3v < v in < 5.5v 50 150 v/v v out / i out load regulation sourcing: 0ma i out 10ma 10 50 v/ma sinking: -5ma i out 0ma 130 400 v/ma i sc short circuit current t a = +25c, v out tied to gnd 50 ma t r turn-on settling time v out = 0.1% 300 s ripple rejection f = 10khz 75 db e n output voltage noise 0.1hz f 10hz 10 v p-p v n broadband voltage noise 10hz f 1khz 2.5 v rms noise density f = 1khz 60 nv/ hz v out / t a thermal hysteresis (note 8) t a = +165c 100 ppm v out / t long term stability (note 9) t a = +25c 100 ppm output disable v enh enable logic high (on) 1.6 v v enl enable logic low (off) 0.8 v i insd shutdown supply current v en 0.35v 0.4 1.5 a notes: 7. over the specified temperature range. temperature coefficien t is measured by the box method whereby the change in v out is divided by the temperature range; in this case, -40c to +125c = +165c. 8. thermal hysteresis is the change of v out measured @ t a = +25c after temperature cycling over a specified range, t a . v out is read initially at t a = +25c for the device under test. the device is temperature cycled and a second v out measurement is taken at +25c. the difference between the initial v out reading and the second v out reading is then expressed in ppm. for t a = +165c, the device under test is cycled from +25c to +125c to -40c to +25c. 9. long term drift is logarithmic in nature and diminishes over time. drift after the first 1000 hours will be approximately 10p pm/ 1khrs. 10. compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
isl21060 7 fn6706.6 december 19, 2013 typical performance curves (isl21060-30) (r ext = 100k ? ) figure 1. v out vs temperature, 3 units figure 2. i in vs v in , 3 temperatures figure 3. i in vs v in [sleep mode], 3 temperatures figure 4. i in vs v enable , 3 temperatures figure 5. load regulation figure 6. line regulation over-temperature 2.9980 2.9985 2.9990 2.9995 3.0000 3.0005 3.0010 3.0015 3.0020 -40 -20 0 20 40 60 80 100 120 temperature (c) v out (v) unit 2 unit 1 unit 3 10 11 12 13 14 15 16 17 3.0 3.5 4.0 4.5 5.0 5.5 v in (v) i in (a) +125c +25c -40c 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 024 v in (v) i in (a) 135 +125c +25c -40c 0 10 20 30 40 50 60 70 80 90 100 01246 v enable (v) i in (a) +125c +25c -40c 35 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 -10 -5 0 5 output current (ma) v out (mv) +125c +25c -40c -160 -130 -100 -70 -40 -10 20 3.03.54.04.5 5.5 v in (v) v out (v) (normalized to v in = 5v) 5.0 +25c +125c -40c
isl21060 8 fn6706.6 december 19, 2013 figure 7. load current vs dropout figure 8. psrr at different capacitive loads figure 9. z out vs frequency figure 10. turn-on time, no load figure 11. turn-on time, 1k ? figure 12. load transient response, 1nf load capacitance typical performance curves (isl21060-30) (r ext = 100k ? ) (continued) 2.95 3.00 3.05 3.10 3.15 3.20 3.25 3.30 -10-8-6-4-2 0 load current (ma) dropout voltage (v) +125c +25c -40c -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k 1m frequency (hz) psrr (db) 10nf 1nf no load 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1k 10k 100k 1m frequency (hz) z out ( ? ) 1nf no load 10nf ch2 high 4.80v ch2 low -500mv ch2 high 4.80v ch2 low -500mv
isl21060 9 fn6706.6 december 19, 2013 figure 13. load transient response, 100nf load capacitance figure 14. line transient response, 1nf load figure 15. line transient response, 100nf figure 16. v out vs v enable typical performance curves (isl21060-30) (r ext = 100k ? ) (continued) -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 02456 v en (v) v out (v) 13 +125c +25c -40c
isl21060 10 fn6706.6 december 19, 2013 typical performance curves (isl21060-41) (r ext = 100k ? ) figure 17. v out vs temperature, 3 units figure 18. i in vs v in , 3 temperatures figure 19. i in vs v in [sleep mode], 3 temperatures figure 20. i in vs v enable , 3 temperatures figure 21. load regulation figure 22. line regulation over-temperature 4.092 4.093 4.094 4.095 4.096 4.097 4.098 4.099 4.100 -40 10 60 110 temperature (c) unit 2 unit 1 unit 3 v out (v) 15 16 17 18 19 20 21 22 23 24 25 4.3 4.5 4.7 4.9 5.1 5.3 5.5 v in (v) i in (a) unit 3 unit 1 unit 2 0.0 0.1 0.2 0.3 0.4 0.5 0.6 046 v in (v) 2 i in (a) +125c +25c -40c 0 10 20 30 40 50 60 70 80 90 100 04 v enable (v) 26 i in (a) +125c +25c -40c -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 -12 -10 -8 -6 -4 -2 0 2 4 6 load current (ma) v out (mv) -40c +25c +125c -175 -125 -75 -25 25 75 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 v in (v) v out (v) (normalized to v in = 5v) -40c +25c +125c
isl21060 11 fn6706.6 december 19, 2013 figure 23. load current vs dropout figure 24. psrr at different capacitive loads figure 25. z out vs frequency figure 26. turn-on time, no load figure 27. turn-on time, 1k ? figure 28. load transient response, 100nf load capacitance typical performance curves (isl21060-41) (r ext = 100k ? ) (continued) 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 -8 -7 -6 -5 -4 -3 -2 -1 0 load current (ma) dropout voltage (v) -40c +25c +125c -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k 1m frequency (hz) psrr (db) 10nf no load 1nf 0 20 40 60 80 100 120 140 160 1 10 100 1k 10k 100k 1m frequency (hz) z out ( ? ) 1nf no load 10nf 100nf ch2 pk-pk -5.17v ch2 pk-pk 5.90v : 8.20v @: 6.84v ch2 pk-pk 2.12v
isl21060 12 fn6706.6 december 19, 2013 figure 29. load transient response, 1nf load capacitance figure 30. line transient response, 1nf load figure 31. line transient response, 100nf load capacitance figure 32. v out vs v enable typical performance curves (isl21060-41) (r ext = 100k ? ) (continued) ch2 pk-pk 2.12v ch2 pk-pk 1.48v @: 1.66v : 2.05v ch2 pk-pk 1.52v @: 1.66v : 2.05v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 23456 v enable (v) v out (v) 1 +125c -40c
isl21060 13 fn6706.6 december 19, 2013 typical performance curves (isl21060-25) (r ext = 100k ? ) figure 33. v out vs temperature, 3 units figure 34. i in vs v in , 3 temperatures figure 35. i in vs v in [sleep mode], 3 temperatures figure 36. i in vs v enable , 3 temperatures figure 37. load regulation figure 38. line regulation over-temperature 2.4980 2.4985 2.4990 2.4995 2.5000 2.5005 2.5010 2.5015 2.5020 2.5025 2.5030 -50 0 50 100 150 temperature (c) v out (v) unit 2 unit 1 unit 3 8 9 10 11 12 13 14 15 16 2.5 3.0 4.5 5.0 5.5 6.0 3.5 4.0 +125c +25c -40c v in (v) i in (a) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0246 v in (v) i in (a) 135 +125c +25c -40c 0 10 20 30 40 50 60 70 80 90 02 5 v enable (v) i in (a) 1346 +125c +25c -40c -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 -12 -10 -8 -6 -4 -2 0 2 4 6 load current (ma) v out (mv) +125c +25c -40c load regulation normalized to v out with no load -200 -150 -100 -50 0 50 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 v in (v) v out (v) v in (v) line regulation normalized at v in = 5 +125c +25c -40c
isl21060 14 fn6706.6 december 19, 2013 figure 39. load current vs dropou t figure 40. turn-on time, no load figure 41. turn-on time, 1k ? figure 42. load transient response, 1nf load capacitance figure 43. load transient response, 100nf load capacitance figure 44. line transient response, 1nf load typical performance curves (isl21060-25) (r ext = 100k ? ) (continued) 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 load current (ma) dropout voltage (v) +125c +25c -40c ch2 pk-pk 5.83v @: 8.72v : 3.80v ch2 pk-pk 5.80v @: 8.72v : 3.80v ch2 pk-pk 1.54v @: 3.40v : 1.90v ch2 pk-pk 1.30v @: 3.40v : 1.90v ch2 pk-pk 2.84v @: 4.44v : 1.90v
isl21060 15 fn6706.6 december 19, 2013 figure 45. line transient response, 100nf figure 46. v out vs v enable typical performance curves (isl21060-25) (r ext = 100k ? ) (continued) -0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 v enable (v) v out (v) +125c +25c -40c typical performance curves (isl21060-20) (r ext = 100k ? ) figure 47. v out vs temperature, 3 units figure 48. i in vs v in , 3 temperatures figure 49. i in vs v in [sleep mode], 3 temperatures figure 50. i in vs v enable , 3 temperatures 2.046 2.047 2.048 2.049 2.050 2.051 2.052 -50 0 50 100 150 temperature (c) v out (v) unit 2 unit 3 unit 1 6 7 8 9 10 11 12 13 14 246 v in (v) i in (a) 35 +125c +25c -40c 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 012 4 6 v in (v) i in (a) 35 +125c +25c -40c 0 10 20 30 40 50 60 70 80 90 0246 v enable (v) i in (a) 135 +125c +25c -40c
isl21060 16 fn6706.6 december 19, 2013 figure 51. load regulation figure 52. line regulation over-temperature figure 53. load current vs dropout figure 54. psrr at different capacitive loads figure 55. z out vs frequency figure 56. turn-on time, no load typical performance curves (isl21060-20) (r ext = 100k ? ) (continued) -0.6 -0.4 -0.2 0 0.2 0.4 0.6 -12-10-8-6-4-20246 load (ma) voltage diff (mv) +125c +25c -40c -350 -300 -250 -200 -150 -100 -50 0 50 100 23456 v in (v) change in output (v) +125c +25c -40c 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 -12 -10 -8 -6 -4 -2 0 load current (ma) dropout voltage +125c +25c -40c -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1k 10k 100k 1m frequency (hz) psrr (db) 10nf no load 1nf 0 10 20 30 40 50 60 70 80 90 1 10 100 1k 10k 100k 1m frequency (hz) z out ( ? ) 10nf no load 1nf
isl21060 17 fn6706.6 december 19, 2013 figure 57. turn-on time, 1k ? figure 58. load transient response, 1nf load capacitance figure 59. load transient response, 100nf load capacitance figure 60. line transient response, 1nf load figure 61. line transient response, 100nf figure 62. v out vs v enable typical performance curves (isl21060-20) (r ext = 100k ? ) (continued) -0.5 0.0 0.5 1.0 1.5 2.0 2.5 012 4 6 v enable (v) v out (v) 35 +125c +25c -40c
isl21060 18 fn6706.6 december 19, 2013 fga technology the isl21060 voltage reference floating gate references possess very low drift and supply current. the charge stored on a floating gate cell is set precisely in ma nufacturing. the reference voltage output itself is a buffered version of the floating gate voltage. the resulting reference device has excellent characteristics which are unique in the industry and include very low temperature drift, high initial accuracy, and almost zero su pply current. also, the reference voltage itself is not limited by voltage bandgaps or zener settings, so a wide range of reference voltages can be programmed (standard voltage settings are provided, but customer-specific voltages are available). the process used for these reference devices is a floating gate cmos process, and the amplifier circuitry uses cmos transistors for amplifier and output drive. this circuitry provides excellent accuracy with a trade-off in output noise level and load regulation due to the mos device characteristics. these limitations are addressed with ci rcuit techniques discussed in other sections. micropower supply current and output enable the isl21060 consumes extremely low supply current due to the proprietary fga technology. low noise performance is achieved using optimized biasing techniques. supply current is typically 16a and noise is 10v p-p , benefitting precision, low noise portable applications, such as handheld meters and instruments. the isl21060 devices have the en pin, which is used to enable/disable the output of the device. when disabled, the reference circuitry itself remains biased at a highly accurate and reliable state. when enabled, the ou tput is driven to the reference voltage in a relatively short time (about 300 s). this feature allows multiple references to be connected and one of them selected. another application is to disable any loads that draw significant current, saving power in standby or shutdown modes. board mounting considerations for applications requiring the hi ghest accuracy, board mounting location should be reviewed. the device uses a plastic soic package, which will subject the di e to mild stresses when the pc board is heated and cooled and slightly changes shape. placing the device in areas subject to slight twisting can cause degradation of the accuracy of the reference voltage due to these die stresses. it is normally best to place the device near the edge of a board, or the shortest side, as the axis of bending is most limited at that location. mounting the device in a cutout also minimizes flex. obviousl y, mounting the device on flexprint or extremely thin pc material will likewise cause loss of reference accuracy. board assembly considerations fga? references provide high accuracy and low temperature drift but some pc board assemb ly precautions are necessary. normal output voltage shifts of 100v to 1mv can be expected with pb-free reflow profiles or wave solder on multi-layer fr4 pc boards. precautions should be ta ken to avoid excessive heat or extended exposure to high reflow or wave solder temperatures, this may reduce device initial accuracy. post-assembly x-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. if x-ray inspection is re quired, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred. if large amount s of shift are observed, it is best to add an x-ray shield consisting of thin zinc (300m) sheeting to allow clear imaging, yet block x-ray energy that affects the fga? reference. special applications considerations in addition to post-assembly ex amination, there are also other x-ray sources that may affect the fga? reference long term accuracy. airport screening machines contain x-rays and will have a cumulative effect on the voltage reference output accuracy. carry-on luggage screening uses low level x-rays and is not a major source of output volt age shift, although if a product is expected to pass through that type of screening over 100 times it may need to consider shielding with copper or aluminum. checked luggage x-rays are higher intensity and can cause output voltage shift in much fewer passes, so devices expected to go through those machines should definitely consider shielding. note that just two layers of 1/2 ounce copper planes will reduce the received dose by over 90%. the leadframe for the device which is on the bottom also provides similar shielding. if a device is expected to pass through luggage x-ray machines numerous times, it is advised to mount a 2-layer (minimum) pc board on the top, and along with a ground plane underneath will effectively shield it from 50 to 100 passes through the machine. since these machines vary in x-ray dose delivered, it is difficult to produce an accurate maximum pass recommendation. noise performance and reduction the output noise voltage in a 0.1hz to 10hz bandwidth is typically 10v p-p . the noise measurement is made with a bandpass filter made of a 1-pole high-pass filter with a corner frequency at 0.1hz and a 2-pole low-pass filter with a corner frequency at 12.6hz to create a filter with a 9.9hz bandwidth. noise in the 10khz to 1mhz bandwidth is approximately 100v p-p with no capacitance on the output. this noise measurement is made with a 2 decade bandpass filter made of a 1-pole high-pass filter with a corner frequency at 1/10 of the center frequency and 1-pole low-pass filter with a corner frequency at 10x the center frequency. load capacitance up to 1f can be added to improve transient response.
isl21060 19 fn6706.6 december 19, 2013 turn-on time the isl21060 devices have low supply current and thus the time to bias-up internal circuitry to final values will be longer than with higher power references. normal turn-on time is typically 300s. circuit design must take this into account when looking at power-up delays or sequencing. temperature coefficient the limits stated for temperature coefficient (tempco) are governed by the method of measurement. the overwhelming standard for specifying the temperature drift of a reference is to measure the reference voltage at two temperatures take the total variation, (v high ? v low ), and divide by the temperature extremes of measurement (t high ?t low ). the result is divided by the nominal reference voltage (at t = +25c) and multiplied by 10 6 to yield ppm/c. this is the ?box? method for specifying temperature coefficient. vout kelvin sensing the voltage output for the isl21060 has both a force and a sense output. this enables remote kelvin sensing for highly accurate voltage setting with long traces and higher current loads. the voutf (force) can be routed to the load with the shortest, widest trace possible. the vouts (sense) is routed with a narrower trace to the point of the actual load where it is connected to the voutf trace. the voutf and vouts traces must always be connected. if there is only a short trace to the load or even a very light load, then they can be connected at or near the isl21060 device.
isl21060 20 intersil products are manufactured, assembled and tested utilizing iso9001 quality systems as noted in the quality certifications found at www.intersil.com/en/suppor t/qualandreliability.html 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 fn6706.6 december 19, 2013 for additional products, see www.intersil.com/en/products.html typical application circuits vin voutf gnd 0.1f 0.001f v out + - v cc r h r l x9119 v ss sda scl 2-wire bus v out (buffered) 10f isl21060-25 v out = 2.50v el8178 (unbuffered) +2.7 to 5.5v en logic enable figure 63. 2.5v full scale low-drift, 10-bit adju stable voltage source with low power disable vouts 0.1f +2.75v to 5.5v v out sense load 10f figure 64. kelvin sensed load vin voutf gnd isl21060-25 v out = 2.50v en vouts logic enable separate copper trace for sense input
isl21060 21 fn6706.6 december 19, 2013 package outline drawing p6.064a 6 lead small outline transistor plastic package rev 0, 2/10 1.60 0.08-0.20 see detail x (0.60) 0-3 3 5 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 0.05 2.90 0.95 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 1.45 max c b a d 3 3 0.20 c (1.90) 2x 0.15 c 2x d 0.15 c 2x a-b (0.25) h 64 5 5 13 2 plane 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:

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