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general description the max6161?ax6168 are precision, low-dropout, micropower voltage references. these three-terminal devices operate with an input voltage range from (v out + 200mv) to 12.6v and are available with output volt- age options of 1.25v, 1.8v, 2.048v, 2.5v, 3v, 4.096v, 4.5v, and 5v. they feature a proprietary curvature-cor- rection circuit and laser-trimmed thin-film resistors that result in a very low temperature coefficient of 5ppm/? (max) and an initial accuracy of ?mv (max). specifications apply to the extended temperature range (-40? to +85?). the max6161?ax6168 typically draw only 100? of supply current and can source 5ma (4ma for max6161) or sink 2ma of load current. unlike conven- tional shunt-mode (two-terminal) references that waste supply current and require an external resistor, these devices offer a supply current that is virtually indepen- dent of the supply voltage (8?/v variation) and do not require an external resistor. additionally, the internally compensated devices do not require an external com- pensation capacitor. eliminating the external compen- sation capacitor saves valuable board area in space-critical applications. a low-dropout voltage and a supply-independent, ultra-low supply current make these devices ideal for battery-operated, high-perfor- mance, low-voltage systems. the max6161?ax6168 are available in 8-pin so packages. ________________________applications analog-to-digital converters (adcs) portable battery-powered systems notebook computers pdas, gps, dmms cellular phones precision +3v/+5v systems ____________________________features ? ?mv (max) initial accuracy ? 5ppm/? (max) temperature coefficient ? 5ma source current at 0.9mv/ma ? 2ma sink current at 2.5mv/ma ? stable with 1? capacitive loads ? no external capacitor required ? 100? (typ) quiescent supply current ? 200mv (max) dropout at 1ma load current ? output voltage options: 1.25v, 1.8v, 2.048v, 2.5v, 3v, 4.096v, 4.5v, 5v 19-1650; rev 3; 8/05 max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references ________________________________________________________________ maxim integrated products 1 out n.c. gnd 1 2 8 7 n.c. n.c. in n.c. n.c. so top view 3 4 6 5 max6161 max6168 ___________________pin configuration * insert the code for the desired initial accuracy and temperature coefficient (from the selector guide) in the blank to complete the part number. typical operating circuit and selector guide appear at end of data sheet. part* temp range pin- package output voltage (v) max6161 _esa -40 c to +85 c 8 so 1.250 max6162 _esa -40 c to +85 c 8 so 2.048 max6163 _esa -40 c to +85 c 8 so 3.000 max6164 _esa -40 c to +85 c 8 so 4.096 max6165 _esa -40 c to +85 c 8 so 5.000 max6166 _esa -40 c to +85 c 8 so 2.500 max6167 _esa -40 c to +85 c 8 so 4.500 max6168 _esa -40 c to +85 c 8 so 1.800 ordering information for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. voltages referenced to gnd in ............................................................-0.3 to +13.5v out ........................................-0.3v to (v in + 0.3v) output short-circuit duration to gnd or in (v in 6v) ...continuous output short-circuit duration to gnd or in (v in > 6v)?..........60s continuous power dissipation (t a = +70?) 8-pin so (derate 5.88mw/? above +70?)...............471mw operating temperature range ...........................-40? to +85? storage temperature range.-65? to +150? lead temperature (soldering, 10s).+300? electrical characteristics?ax6161 (v out = 1.25v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6161a 1.248 1.250 1.252 output voltage v out t a = +25 c max6161b 1.246 1.250 1.254 v max6161a 4 10 output voltage temperature coefficient (note 2) tcv out max6161b 6 15 ppm/ c line regulation v out / v in 2.5v < v in < 12.6v 12 150 ?/v sourcing: 0 < i out < 4ma 0.5 0.9 load regulation v out / i out sinking: -2ma < i out < 0 1.3 2.5 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c 115 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 20 ?p-p noise voltage e out f = 10hz to 10khz 15 ? rms ripple rejection v out /v in v in = +5v 100mv, f = 120hz 80 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 50 ? input characteristics supply voltage range v in guaranteed by line-regulation test 2.5 12.6 v quiescent supply current i in 125 150 ? change in supply current i in / v in 2.5v < v in < 12.6v 3.2 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references _______________________________________________________________________________________ 3 electrical characteristics?ax6168 (v out = 1.800v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6168a 1.798 1.800 1.802 output voltage v out t a = +25 c max6168b 1.795 1.800 1.805 v max6168a 2 5 output voltage temperature coefficient (note 2) tcv out max6168b 4 10 ppm/ c line regulation v out / v in 2.5v v in 12.6v 42 200 ?/v sourcing: 0 < i out < 5ma 0.5 0.9 load regulation v out / i out sinking: -2ma < i out < 0 1.5 4 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 22 ?p-p noise voltage e out f = 10hz to 10khz 25 ? rms ripple rejection v out / v in v in = +5v 100mv, f = 120hz 78 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 100 ? input characteristics supply voltage range v in guaranteed by line-regulation test 2.5 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in 2.5v < v in < 12.6v 3.4 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 4 _______________________________________________________________________________________ electrical characteristics?ax6162 (v out = 2.048v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6162a 2.046 2.048 2.050 output voltage v out t a = +25 c max6162b 2.043 2.048 2.053 v max6162a 2 5 output voltage temperature coefficient (note 2) tcv out max6162b 4 10 ppm/ c line regulation v out / 2.5v < v in < 12.6v 42 250 ?/v sourcing: 0 < i out < 5ma 0.5 0.9 load regulation v out / i out sinking: -2ma < i out < 0 1.5 4 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 22 ?p-p noise voltage e out f = 10hz to 10khz 25 ? rm s ripple rejection v out /v in v in = 5v 100mv, f = 120hz 78 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 100 ? input characteristics supply voltage range v in guaranteed by line-regulation test 2.5 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in 2.5v < v in < 12.6v 3.4 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references _______________________________________________________________________________________ 5 electrical characteristics?ax6166 (v out = 2.500v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6166a 2.498 2.500 2.502 output voltage v out t a = +25 c max6166b 2.495 2.500 2.505 v max6166a 2 5 output voltage temperature coefficient (note 2) tcv out max6166b 4 10 ppm/ c dropout voltage (note 4) v in - v out i out = 1ma 50 200 mv line regulation v out / v in v out + 0.2v < v in < 12.6v 60 250 ?/v sourcing: 0 < i out < 5ma 0.5 0.9 load regulation v out / i out sinking: -2ma < i out < 0 1.6 5 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 27 ?p-p noise voltage e out f = 10hz to 10khz 30 ? rms ripple rejection v out /v in v in = 5v 100mv, f = 120hz 76 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 115 ? input characteristics supply voltage range v in guaranteed by line-regulation test v out + 0.2 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in v out + 0.2v < v in < 12.6v 3.2 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 6 _______________________________________________________________________________________ electrical characteristics max6163 (v out = 3.000v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6163a 2.998 3.000 3.002 output voltage v out t a = +25 c max6163b 2.995 3.000 3.005 v max6163a 2 5 output voltage temperature coefficient (note 2) tcv out max6163b 4 10 ppm/ c dropout voltage (note 4) v in - v out i out = 1ma 50 200 mv line regulation v out / v in v out + 0.2v < v in < 12.6v 83 300 ?/v sourcing: 0 < i out < 5ma 0.5 0.9 load regulation v out / i out sinking: -2ma < i out < 0 1.8 5 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 35 ?p-p noise voltage e out f = 10hz to 10khz 40 ? rms ripple rejection v out /v in v in = 5v 100mv, f = 120hz 76 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 115 ? input characteristics supply voltage range v in guaranteed by line-regulation test v out + 0.2 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in v out + 0.2v < v in < 12.6v 3.2 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references _______________________________________________________________________________________ 7 electrical characteristics?ax6164 (v out = 4.096v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6164a 4.094 4.096 4.098 output voltage v out t a = +25 c max6164b 4.091 4.096 4.101 v max6164a 2 5 output voltage temperature coefficient (note 2) tcv out max6164b 4 10 ppm/ c dropout voltage (note 4) v in - v out i out = 1ma 50 200 mv line regulation v out / v in v out + 0.2v < v in < 12.6v 140 300 ?/v sourcing: 0 < i out < 5ma 0.6 0.9 load regulation v out / i out sinking: -2ma < i out < 0 2.0 7.0 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 50 ?p-p noise voltage e out f = 10hz to 10khz 50 ? rms ripple rejection v out /v in v in = 5v 100mv, f = 120hz 72 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 190 ? input characteristics supply voltage range v in guaranteed by line-regulation test v out + 0.2 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in v out + 0.2v < v in < 12.6v 3.2 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 8 _______________________________________________________________________________________ electrical characteristics max6167 (v out = 4.500v) (v in = +5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6167a 4.498 4.500 4.502 output voltage v out t a = +25 c max6167b 4.495 4.500 4.505 v max6167a 2 5 output voltage temperature coefficient (note 2) tcv out max6167b 4 10 ppm/ c dropout voltage (note 4) v in - v out i out = 1ma 50 200 mv line regulation v out / v in v out + 0.2v < v in < 12.6v 160 450 ?/v sourcing: 0 < i out < 5ma 0.6 0.9 load regulation v out / i out sinking: -2ma < i out < 0 2.3 8.0 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out/ cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 55 ?p-p noise voltage e out f = 10hz to 10khz 55 ? rms ripple rejection v out /v in v in = 5v 100mv, f = 120hz 70 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 230 ? input characteristics supply voltage range v in guaranteed by line-regulation test v out + 0.2 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in v out + 0.2v < v in < 12.6v 3.1 8.0 ?/v
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references _______________________________________________________________________________________ 9 electrical characteristics?ax6165 (v out = 5.000v) (v in = +5.5v, i out = 0, t a = t min to t max , unless otherwise specified. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units max6165a 4.998 5.000 5.002 output voltage v out t a = +25 c max6165b 4.995 5.000 5.005 v max6165a 2 5 output voltage temperature coefficient (note 2) tcv out max6165b 4 10 ppm/ c dropout voltage (note 4) v in - v out i out = 1ma 50 200 mv line regulation v out / v out + 0.2v < v in < 12.6v 180 400 ?/v sourcing: 0 < i out < 5ma 0.6 0.9 load regulation v out / i out sinking: -2ma < i out < 0 2.4 8.0 mv/ma short to gnd 110 out short-circuit current i sc short to in 25 ma long-term stability v out / time 1000hr at +25 c80 ppm/ 1000hr output voltage hysteresis (note 3) v out / cycle 125 ppm dynamic characteristics f = 0.1hz to 10hz 60 ?p-p noise voltage e out f = 10hz to 10khz 60 ? rms ripple rejection v out /v in v in = 5.5v 100mv, f = 120hz 65 db turn-on settling time t r v out to 0.1% of final value, c out = 50pf 300 ? input characteristics supply voltage range v in guaranteed by line-regulation test v out + 0.2 12.6 v quiescent supply current i in 100 120 ? change in supply current i in / v in v out + 0.2v < v in < 12.6v 3.1 8.0 ?/v note 1: 100% production tested at t a = +25?. guaranteed by design for t a = -40? to +85?. note 2: temperature coefficient is specified by the ?ox?method; i.e., the maximum v out is divided by the maximum t. note 3: thermal hysteresis is defined as the change in t a = +25? output voltage before and after temperature cycling of the device (from t a = t min to t max ). initial measurement at t a = +25? is followed by temperature cycling the device to t a = +85? then to t a = -40?, and another measurement at t a = +25? is compared to the original measurement at t a = +25?. note 4: dropout voltage is the minimum input voltage at which v out changes 0.2% from v out at v in = 5.0v (v in = 5.5v for max6165).
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 10 ______________________________________________________________________________________ typical operating characteristics (v in = +5v for max6161?ax6168, v in = +5.5v for max6165, i out = 0, t a = +25?, unless otherwise noted.) (note 5) max6161 output voltage temperature drift max6161/68 toc01 temperature ( c) output voltage (v) 70 55 25 40 -10 0 10 -25 1.2496 1.2497 1.2498 1.2499 1.2500 1.2501 1.2502 1.2503 1.2504 1.2505 1.2495 -40 85 3 typical parts max6165 output voltage temperature drift max6161/68 toc02 temperature ( c) output voltage (v) 70 55 -25 -10 0 25 10 40 4.9985 4.9990 4.9995 5.0000 5.0005 5.0010 5.0015 5.0020 4.9980 -40 85 3 typical parts max6161 long-term drift max6161/68 toc03 time (hrs) drift (ppm) 768 192 384 576 -30 -20 -10 0 10 20 30 40 50 60 -40 0 960 max6165 long-term drift max6161/68 toc04 time (hrs) drift (ppm) 768 192 384 576 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 -100 0960 -300 -200 -100 0 100 200 300 2 4 6 8 10 12 max6161 line regulation max6161/68 toc05 input voltage (v) output voltage change ( v) t a = +85 c t a = +25 c t a = -40 c -1200 -600 -800 -1000 -400 -200 0 200 59 71113 max6165 line regulation max6161/68 toc06 input voltage (v) output voltage change ( v) t a = +85 c t a = +25 c t a = -40 c -3 1 0 -1 -2 2 3 4 5 -4 -2 0 2 4 max6161/68 toc07 load current (ma) output voltage change (mv) t a = +25 c t a = -40 c max6161 load regulation t a = +85 c -6 2 0 -2 -4 4 8 6 10 12 -6 -2 -4 0246 max6161/68 toc08 load current (ma) output voltage change (mv) max6165 load regulation t a = +25 c t a = +85 c t a = -40 c 0 0.10 0.05 0.20 0.15 0.25 0.30 02 1345 max6166 dropout voltage vs. load current max6161/68 toc09 load current (ma) dropout voltage (v) t a = +85 c t a = +25 c t a = -40 c
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references ______________________________________________________________________________________ 11 typical operating characteristics (continued) (v in = +5v for max6161?ax6168, v in = +5.5v for max6165, i out = 0, t a = +25?, unless otherwise noted.) (note 5) 0 0.05 0.15 0.10 0.20 0.25 02 1345 t a = +85 c t a = +25 c t a = -40 c max6161/68 toc10 load current (ma) dropout voltage (v) max6165 dropout voltage vs. load current max6161/68 toc11 frequency (khz) psrr (db) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 0.001 1 10 100 0.01 0.1 1000 max6161 power-supply rejection ratio vs. frequency -70 -80 0.001 10 1000 -60 -50 -40 -30 -20 -10 0 frequency (khz) psrr (db) 0.1 max6165 power-supply rejection ratio vs. frequency max6161/68 toc12 max6161 supply current vs. supply voltage max6161/68 toc13 supply voltage (v) supply current ( a) 12 10 8 6 4 108 116 124 132 140 148 156 164 172 180 100 214 t a = +85 c t a = +25 c t a = -40 c max6165 supply current vs. supply voltage max6161/68 toc14 supply voltage (v) supply current ( a) 13 12 10 11 7 8 9 6 96 102 108 114 120 126 132 138 144 150 90 514 t a = +85 c t a = +25 c t a = -40 c max6161 supply current vs. temperature max6161/68 toc15 temperature ( c) supply current ( a) 60 35 10 -15 108 116 124 132 140 148 156 164 172 180 100 -40 85 v cc = +12.6v v cc = +5v v cc = +2.5v max6165 supply current vs. temperature max6161/68 toc16 temperature ( c) supply current ( a) 60 35 10 -15 96 102 108 114 120 126 132 138 144 150 90 -40 85 v cc = +12.6v v cc = +5.2v 0 0.001 10 1000 40 20 60 80 100 140 120 160 180 200 220 max6161/68 toc17 frequency (khz) output impedance ( ) 0.1 max6161 output impedance vs. frequency 180 0 0.001 10 1000 40 20 60 100 80 120 140 160 max6161/68 toc18 frequency (khz) output impedance ( ) 0.1 max6165 output impedance vs. frequency
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 12 ______________________________________________________________________________________ typical operating characteristics (continued) (v in = +5v for max6161?ax6168, v in = +5.5v for max6165, i out = 0, t a = +25?, unless otherwise noted.) (note 5) v out 10 v/div 1s/div max6161 0.1hz to 10hz output noise max6161/68 toc19 v out 10 v/div 1s/div max6165 noise max6161/68 toc20 v out 500mv/div v in 5v/div 10 s/div max6161 turn-on transient (c l = 50pf) max6161/68 toc21 v out 2v/div v in 5v/div 40 s/div max6165 turn-on transient (c l = 50pf) max6161/67 toc22 i out 500 a/div v out ac-coupled 100mv/div 400 s/div max6161 load transient (i out = 250 a, v in = 5.0, c l = 0) +250 a -250 a max6161/68 toc23 i out 500 a/div v out ac-coupled 50mv/div 400 s/div max6165 load transient (i out = 250 a, c l = 0, v in = 5.5v) +250 a -250 a max6161/68 toc24
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references ______________________________________________________________________________________ 13 i out 5ma/div v out ac-coupled 50mv/div 400 s/div max6165 load transient (c l = 0, i out = 2ma, v in = 5.5v) +2ma -2ma max6161/68 toc28 i out 5ma/div v out ac-coupled 100mv/div 400 s/div max6161 load transient (v in = 5.0v, c l = 0, i out = 2ma) +2ma -2ma max6161/68 toc27 i out 5ma/div v out ac-coupled 50mv/div 400 s/div max6161 load transient (v in = 5.0v, c l = 1 f, i out = 2ma) +2ma -2ma max6161/68 toc29 i out 5ma/div v out ac-coupled 20mv/div 400 s/div max6165 load transient (c l = 1 f, i out = 2ma, v in = 5.5v) +2ma -2ma max6161/68 toc30 i out 500 a/div v out ac-coupled 10mv/div 400 s/div max6161 load transient (i out = 250 a, v in = 5.0v, c l = 1 f) +250 a -250 a max6161/68 toc25 i out 500 a/div v out ac-coupled 20mv/div 400 s/div max6165 load transient (i out = 250 a, c l = 1 f, v in = 5.5v) +250 a -250 a max6161/68 toc26 typical operating characteristics (continued) (v in = +5v for max6161?ax6168, v in = +5.5v for max6165, i out = 0, t a = +25?, unless otherwise noted.) (note 5)
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 14 ______________________________________________________________________________________ i out 5ma/div v out ac-coupled 50mv/div 400 s/div max6161 load transient (v in = 5.0v, c l = 1 f, i out = 4ma) +4ma -4ma max6161/68 toc33 i out 5ma/div v out ac-coupled 50mv/div 400 s/div max6165 load transient (i out = 5ma, c l = 1 f, v in = 5.5v) +5ma -5ma max6161/68 toc34 v in 500mv/div v out ac-coupled 20mv/div 40 s/div max6161 line transient (c l = 0) +0.25v -0.25v max6161/68 toc35 v in 500mv/div v out ac-coupled 20mv/div 40 s/div max6165 line transient (c l = 0) +0.25v -0.25v max6161/68 toc36 note 5: many of the typical operating characteristics of the max6161 family are extremely similar. the extremes of these characteristics are found in the max6161 (1.25v output) and the max6165 (5.0v output). the typical operating characteristics of the remain- der of the max6161 family typically lie between these two extremes and can be estimated based on their output voltages. typical operating characteristics (continued) (v in = +5v for max6161?ax6168, v in = +5.5v for max6165, i out = 0, t a = +25?, unless otherwise noted.) (note 5) i out 5ma/div v out ac-coupled 200mv/div 400 s/div max6161 load transient (v in = 5.0v, c l = 0, i out = 4ma) +4ma -4ma max6161/68 toc31 i out 5ma/div v out ac-coupled 100mv/div 400 s/div max6165 load transient (i out = 5ma, c l = 0, v in = 5.5v) +5ma -5ma max6161/68 toc32
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references ______________________________________________________________________________________ 15 applications information input bypassing for the best line-transient performance, decouple the input with a 0.1? ceramic capacitor as shown in the typical operating circuit . locate the capacitor as close to in as possible. when transient performance is less important, no capacitor is necessary. output/load capacitance devices in the max6161 family do not require an output capacitor for frequency stability. in applications where the load or the supply can experience step changes, an output capacitor of at least 0.1? will reduce the amount of overshoot (undershoot) and improve the cir- cuit? transient response. many applications do not require an external capacitor, and the max6161 family can offer a significant advantage in applications when board space is critical. supply current the quiescent supply current of the series-mode max6161 family is typically 100? and is virtually inde- pendent of the supply voltage, with only an 8a/v (max) variation with supply voltage. unlike series refer- ences, shunt-mode references operate with a series resistor connected to the power supply. the quiescent current of a shunt-mode reference is thus a function of the input voltage. additionally, shunt-mode references have to be biased at the maximum expected load cur- rent, even if the load current is not present at the time. in the max6161 family, the load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. this improved efficiency reduces power dissi- pation and extends battery life. when the supply voltage is below the minimum speci- fied input voltage (as during turn-on), the devices can draw up to 400? beyond the nominal supply current. the input voltage source must be capable of providing this current to ensure reliable turn-on. output voltage hysteresis output voltage hysteresis is the change in the input voltage at t a = +25? before and after the device is cycled over its entire operating temperature range. hysteresis is caused by differential package stress appearing across the bandgap core transistors. the typical temperature hysteresis value is 125ppm. turn-on time these devices typically turn on and settle to within 0.1% of their final value in 50? to 300?, depending on the output voltage (see electrical table of part used). the turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load. in +supply input (see selector guide ) out reference out 1 f* *capacitors are optional. gnd max6161 max6168 0.1 f* typical operating circuit __________________________ chip information transistor count: 117 process: bicmos pin description pin name function no connection. not internally connected. n.c. 1, 3, 5, 7, 8 2 in input voltage ground gnd 4 6 out reference output
max6161?ax6168 precision, micropower, low-dropout, high- output-current, so-8 voltage references 16 ______________________________________________________________________________________ selector guide part output voltage (v) initial accuracy (mv) temperature coefficient (ppm/?) max6161a 1.250 210 max6161b 1.250 415 max6168a 1.800 25 max6168b 1.800 510 max6162a 2.048 25 max6162b 2.048 510 max6166a 2.500 25 max6166b 2.500 510 max6163a 3.000 25 max6163b 3.000 510 max6164a 4.096 25 max6164b 4.096 510 max6167a 4.500 25 max6167b 4.500 510 max6165a 5.000 25 max6165b 5.000 510
max6161?ax6168 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 17 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. soicn .eps package outline, .150" soic 1 1 21-0041 b rev. document control no. approval proprietary information title: top view front view max 0.010 0.069 0.019 0.157 0.010 inches 0.150 0.007 e c dim 0.014 0.004 b a1 min 0.053 a 0.19 3.80 4.00 0.25 millimeters 0.10 0.35 1.35 min 0.49 0.25 max 1.75 0.050 0.016 l 0.40 1.27 0.394 0.386 d d min dim d inches max 9.80 10.00 millimeters min max 16 ac 0.337 0.344 ab 8.75 8.55 14 0.189 0.197 aa 5.00 4.80 8 n ms012 n side view h 0.244 0.228 5.80 6.20 e 0.050 bsc 1.27 bsc c h e e b a1 a d 0 -8 l 1 variations: precision, micropower, low-dropout, high- output-current, so-8 voltage references package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .)

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