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general description the max6129 micropower, low-dropout bandgap volt- age reference combines ultra-low supply current and low drift in a miniature 5-pin sot23 surface-mount package that uses 70% less board space than compa- rable devices in an so package. this series-mode volt- age reference sources up to 4ma and sinks up to 1ma of load current. a wide 2.5v to 12.6v supply range, ultra-low 5.25? (max) supply current, and a low 200mv dropout voltage make these devices ideal for battery-operated systems. an initial accuracy of 0.4% and a 40ppm/? (max) tem- perature coefficient make the max6129 suitable for precision applications. additionally, an internal com- pensation capacitor eliminates the need for an external compensation capacitor and ensures stability with load capacitances up to 10?. the max6129 provides six output voltages of 2.048v, 2.5v, 3v, 3.3v, 4.096v, and 5v. the max6129 is avail- able in a 5-pin sot23 package and in die form. applications battery-powered systems hand-held instruments precision power supplies a/d and d/a converters features ? ultra-low 5.25a (max) supply current ? 4ma output source current ? 1ma output sink current ? 0.4% (max) initial accuracy ? 40ppm/c (max) temperature coefficient ? 2.5v to 12.6v supply range ? low 200mv dropout ? stable with capacitive loads up to 10f ? no external capacitors required ? miniature 5-pin sot23 package max6129 ultra-low-power series voltage reference ________________________________________________________________ maxim integrated products 1 gnd n.c. n.c. 15 out in max6129 sot23 top view 2 34 pin configuration ordering information out gnd in max6129 v in = 2.5v to 12.6v *capacitor is optional * t ypical operating circuit 19-2507; rev 1; 1/04 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. pa r t temp range pin - pa c k a g e o u tpu t vo lt a g e ( v) m ax 6129_e u k 21- t -40? to +85? 5 sot23-5 2.048 m ax 6129ac /d 21 -40? to +85? dice 2.048 m ax 6129_e u k 25- t -40? to +85? 5 sot23-5 2.500 m ax 6129ac /d 25 -40? to +85? dice 2.500 m ax 6129_e u k 30- t -40? to +85? 5 sot23-5 3.000 m ax 6129ac /d 30 -40? to +85? dice 3.000 m ax 6129_e u k 33- t -40? to +85? 5 sot23-5 3.300 m ax 6129ac /d 33 -40? to +85? dice 3.300 m ax 6129_e u k 41- t -40? to +85? 5 sot23-5 4.096 m ax 6129ac /d 41 -40? to +85? dice 4.096 m ax 6129_e u k 501- t -40? to +85? 5 sot23-5 5.000 m ax 6129ac /d 50 -40? to +70? dice 5.000 note: the max6129_euk is available in a or b grade. choose the desired grade from the selector guide and insert the suffix in the blank above to complete the part number. selector guide appears at end of data sheet.
max6129 ultra-low-power series voltage reference 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. in to gnd ...............................................................-0.3v to +13v out to gnd ..............-0.3v to the lower of +6v and (v in + 0.3v) output to gnd short-circuit duration........................continuous continuous power dissipation (t a = +70?) 5-pin sot23 (derate 7.1mw/? above +70?)............571mw operating temperature range ...........................-40? to +85? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? electrical characteristics?max6129_21 (v out = 2.048v) (v in = 2.5v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 2.0398 2.0480 2.0562 output voltage v out t a = +25 c max6129b (?%) 2.0275 2.0480 2.0685 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 2.5v to 12.6v 27 200 ?/v i out = 0 to 4ma 0.22 0.7 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 2.4 5.5 ?/? output short-circuit current i sc 60 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 30 v p-p noise voltage e out f = 10hz to 1khz 115 v rms ripple rejection ? v out / ? v in v in = 2.5v 200mv, f = 120hz 43 db turn-on settling time t r to v out = 0.1% of final value 450 ? input supply voltage range v in 2.5 12.6 v supply current i in 5.25 ? change in supply current (note 4) i in /v in v in = 2.5v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference _______________________________________________________________________________________ 3 electrical characteristics?max6129_25 (v out = 2.500v) (v in = 2.7v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 2.4900 2.5000 2.5100 output voltage v out t a = +25 c max6129b (?%) 2.4750 2.5000 2.5250 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 2.7v to 12.6v 30 230 ?/v i out = 0 to 4ma 0.1 0.6 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 2.5 6.2 ?/? i out = 0 0.3 100 dropout voltage (notes 4, 6) v in - v out i out = 4ma 140 200 mv output short-circuit current i sc 60 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 39 v p-p noise voltage e out f = 10hz to 1khz 137 v rms ripple rejection ? v out / ? v in v in = 2.7v 200mv, f = 120hz 34 db turn-on settling time t r to v out = 0.1% of final value 700 ms input supply voltage range v in 2.7 12.6 v supply current i in 5.75 ? change in supply current (note 4) i in /v in v in = 2.7v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference 4 _______________________________________________________________________________________ electrical characteristics?max6129_30 (v out = 3.000v) (v in = 3.2v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 2.9880 3.0000 3.0120 output voltage v out t a = +25 c max6129b (?%) 2.9700 3.0000 3.0300 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 3.2v to 12.6v 15 250 ?/v i out = 0 to 4ma 0.1 0.6 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 2.4 6.5 ?/? i out = 0 0.2 100 dropout voltage (notes 4, 6) v in - v out i out = 4ma 140 200 mv output short-circuit current i sc 25 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 50 v p-p noise voltage e out f = 10hz to 1khz 161 v rms ripple rejection ? v out / ? v in v in = 3.2v 200mv, f = 120hz 37 db turn-on settling time t r to v out = 0.1% of final value 775 ? input supply voltage range v in 3.2 12.6 v supply current i in 6.75 ? change in supply current (note 4) i in /v in v in = 3.2v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference _______________________________________________________________________________________ 5 electrical characteristics?max6129_33 (v out = 3.300v) (v in = 3.5v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 3.2868 3.3000 3.3132 output voltage v out t a = +25 c max6129b (?%) 3.2670 3.3000 3.3330 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 3.5v to 12.6v 30 270 ?/v i out = 0 to 4ma 0.1 0.6 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 2.4 7 ?/? i out = 0 0.2 100 dropout voltage (notes 4, 6) v in - v out i out = 4ma 140 200 mv output short-circuit current i sc 25 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 56 v p-p noise voltage e out f = 10hz to 1khz 174 v rms ripple rejection ? v out / ? v in v in = 3.5v 200mv, f = 120hz 38 db turn-on settling time t r to v out = 0.1% of final value 1 ms input supply voltage range v in 3.5 12.6 v supply current i in 7.25 ? change in supply current (note 4) i in /v in v in = 3.5v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference 6 _______________________________________________________________________________________ electrical characteristics?max6129_41 (v out = 4.096v) (v in = 4.3v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 4.0796 4.0960 4.1124 output voltage v out t a = +25 c max6129b (?%) 4.0550 4.0960 4.1370 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 4.3v to 12.6v 30 310 ?/v i out = 0 to 4ma 0.1 0.6 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 2.5 8.5 ?/? i out = 0 0.18 100 dropout voltage (notes 4, 6) v in - v out i out = 4ma 140 200 mv output short-circuit current i sc 25 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 72 v p-p noise voltage e out f = 10hz to 1khz 210 v rms ripple rejection ? v out / ? v in v in = 4.3v 200mv, f = 120hz 36 db turn-on settling time t r to v out = 0.1% of final value 1.2 ms input supply voltage range v in 4.3 12.6 v supply current i in 8.75 ? change in supply current (note 4) i in /v in v in = 4.3v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference _______________________________________________________________________________________ 7 note 1: max6129 is 100% production tested at t a = +25? and is guaranteed by design for t a = t min to t max as specified. note 2: temperature coefficient is defined by box method: (v max - v min )/( ? t ? v +25? ). note 3: not production tested. guaranteed by design for both sot23 and dice. note 4: only the typical values apply to max6129a sold in die form (max values apply to packaged parts). note 5: thermal hysteresis is defined as the change in output voltage at t a = +25? before and after cycling the device from t max to t min . note 6: dropout voltage is the minimum input voltage at which v out changes by 0.1% from v out at rated v in and is guaranteed by load regulation test. electrical characteristics?max6129_50 (v out = 5.000v) (v in = 5.2v, i out = 0, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units output max6129a (?.4%) 4.9800 5.0000 5.0200 output voltage v out t a = +25 c max6129b (?%) 4.9500 5.0000 5.0500 v max6129a 40 output voltage temperature coefficient (notes 2, 3) tcv out max6129b 100 ppm/ c line regulation (note 4) ? v out / ? v in v in = 5.2v to 12.6v 34 375 ?/v i out = 0 to 4ma 0.3 0.8 load regulation (note 4) ? v out / ? i out i out = 0 to -1ma 3.3 9 ?/? i out = 0 0.175 100 dropout voltage (notes 4, 6) v in - v out i out = 4ma 140 200 mv output short-circuit current i sc 25 ma long-term stability ? v out /time 1000 hours at +25 c 150 ppm thermal hysteresis (note 5) 140 ppm dynamic characteristics f = 0.1hz to 10hz 90 v p-p noise voltage e out f = 10hz to 1khz 245 v rms ripple rejection ? v out / ? v in v in = 5.2v 200mv, f = 120hz 38 db turn-on settling time t r to v out = 0.1% of final value 1.4 ms input supply voltage range v in 5.2 12.6 v supply current i in 10.5 ? change in supply current (note 4) i in /v in v in = 5.2v to 12.6v 1.0 1.5 ?/v
max6129 ultra-low-power series voltage reference 8 _______________________________________________________________________________________ t ypical operating characteristics (v in = 2.5v for max_euk21, v in = 3.2v for max_euk30, and v in = 5.2v for max_euk50, i out = 0, t a = +25?, unless otherwise noted.) output voltage vs. temperature (v out = 2.048v) max6129 toc01 temperature ( c) output voltage (v) 60 35 10 -15 2.042 2.044 2.046 2.048 2.050 2.040 -40 85 3 typical units output voltage vs. temperature (v out = 3v) max6129 toc02 temperature ( c) output voltage (v) 60 35 10 -15 2.993 2.995 2.997 2.999 3.001 3.003 2.991 -40 85 3 typical units output voltage vs. temperature (v out = 5v) max6129 toc03 temperature ( c) output voltage (v) 4.990 4.992 4.994 4.996 4.998 5.000 5.002 5.004 5.006 4.988 60 35 10 -15 -40 85 3 typical units supply current vs. input voltage max6129 toc04 input voltage (v) supply current ( a) 12 11 10 9 8 7 6 5 4 3 2 1 2 4 6 8 10 12 14 0 013 v out = 3v v out = 5v v out = 2.048v supply current vs. temperature max6129 toc05 temperature ( c) supply current ( a) 60 35 10 -15 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 2.5 -40 85 v out = 3v v out = 5v v out = 2.048v dropout voltage vs. source current (v out = 2.048v) max6129 toc06 source current (ma) dropout voltage (v) 6 5 1 2 3 4 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0 07 dropout voltage vs. source current (v out = 3v) max6129 toc07 source current (ma) dropout voltage (v) 6 5 3 4 2 1 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0 07 dropout voltage vs. source current (v out = 5v) max6129 toc08 source current (ma) dropout voltage (v) 6 5 3 4 2 1 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0 07 load regulation (v out = 2.048v) max6129 toc09 output current (ma) output voltage (v) 6 5 3 4 0 1 2 -1 2.0475 2.0480 2.0485 2.0490 2.0495 2.0500 2.0505 2.0510 2.0515 2.0520 2.0470 -2 7
max6129 ultra-low-power series voltage reference _______________________________________________________________________________________ 9 line regulation (v out = 2.048v) max6129 toc10 input voltage (v) output voltage (v) 11.5 10.0 7.0 8.5 5.5 4.0 2.04774 2.04776 2.04778 2.04780 2.04782 2.04784 2.04786 2.04788 2.04790 2.04792 2.04772 2.5 13.0 load regulation (v out = 3v) max6129 toc11 output current (ma) output voltage (v) 6 5 3 4 0 1 2 -1 3.0015 3.0020 3.0025 3.0030 3.0035 3.0040 3.0045 3.0050 3.0055 3.0010 -2 7 line regulation (v out = 3v) max6129 toc12 input voltage (v) output voltage (v) 12 11 10 9 8 7 6 5 4 3.00160 3.00165 3.00170 3.00175 3.00180 3.00155 313 load regulation (v out = 5v) max6129 toc13 output current (ma) output voltage (v) 6 5 3 4 0 1 2 -1 5.0015 5.0020 5.0025 5.0030 5.0035 5.0040 5.0045 5.0050 5.0005 5.0010 -2 7 line regulation (v out = 5v) max6129 toc14 input voltage (v) output voltage (v) 12 11 6 7 8 9 10 5.00066 5.00068 5.00070 5.00072 5.00074 5.00076 5.00078 5.00080 5.00064 513 power-supply rejection ratio vs. frequency (v out = 2.048v) max6129 toc15 frequency (khz) psrr (db) 100 10 1 -50 -40 -30 -20 -10 0 -60 0.1 1000 power-supply rejection ratio vs. frequency (v out = 3v) max6129 toc16 frequency (khz) psrr (db) 100 10 1 -50 -40 -30 -20 -10 0 -60 0.1 1000 power-supply rejection ratio vs. frequency (v out = 5v) max6129 toc17 frequency (khz) psrr (db) 100 10 1 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 -50 0.1 1000 t ypical operating characteristics (continued) (v in = 2.5v for max_euk21, v in = 3.2v for max_euk30, and v in = 5.2v for max_euk50, i out = 0, t a = +25?, unless otherwise noted.) line-transient response (v out = 2.048v) max6129 toc18 200 s/div 3v 2.5v 2.048v v in 200mv/div ac-coupled v out 200mv/div ac-coupled
max6129 ultra-low-power series voltage reference 10 ______________________________________________________________________________________ line-transient response (v out = 3v) max6129 toc19 200 s/div 3.7v 3.2v 3v v in 200mv/div ac-coupled v out 200mv/div ac-coupled line-transient response (v out = 5v) max6129 toc20 200 s/div 5.7v 5.2v 5v v in 200mv/div ac-coupled v out 100mv/div ac-coupled load-transient response (sourcing, v out = 2.048v) max6129 toc21 100 s/div 4ma 2.048v i out 10ma/div v out 500mv/div ac-coupled c out = 0 0 load-transient response (sinking, v out = 2.048v) max6129 toc22 1ms/div 0 -1ma 2.048v i out 2ma/div v out 500mv/div ac-coupled c out = 0 load-transient response (sourcing, v out = 2.048v) max6129 toc23 400 s/div 4ma 2.048v i out 10ma/div v out 500mv/div ac-coupled c out = 1 f 0 load-transient response (sinking, v out = 2.048v) max6129 toc24 1ms/div 0 -1ma 2.048v i out 2ma/div v out 500mv/div ac-coupled c out = 1 f t ypical operating characteristics (continued) (v in = 2.5v for max_euk21, v in = 3.2v for max_euk30, and v in = 5.2v for max_euk50, i out = 0, t a = +25?, unless otherwise noted.)
max6129 ultra-low-power series voltage reference ______________________________________________________________________________________ 11 load-transient response (sinking, v out = 5v) max6129 toc28 2ms/div 0 -1ma 5v i out 1ma/div v out 1v/div ac-coupled c out = 1 f turn-on transient (v out = 2.048v) max6129 toc29 200 s/div 2.5v 2.048v v in 1v/div v out 1v/div 0 0 turn-on transient (v out = 3v) max6129 toc30 200 s/div 3.2v 3v v in 2v/div v out 1v/div 0 0 load-transient response (sourcing, v out = 5v) max6129 toc25 400 s/div 4ma 5v i out 10ma/div v out 500mv/div ac-coupled c out = 0 0 load-transient response (sinking, v out = 5v) max6129 toc26 2ms/div 0 -1ma 5v i out 1ma/div v out 1v/div ac-coupled c out = 0 load-transient response (sourcing, v out = 5v) max6129 toc27 400 s/div 4ma 6v i out 10ma/div v out 200mv/div ac-coupled c out = 1 f 0 t ypical operating characteristics (continued) (v in = 2.5v for max_euk21, v in = 3.2v for max_euk30, and v in = 5.2v for max_euk50, i out = 0, t a = +25?, unless otherwise noted.)
max6129 ultra-low-power series voltage reference 12 ______________________________________________________________________________________ noise vs. frequency (v out = 5v) max6129 toc37 frequency (khz) noise ( v rms / hz ) 40 30 20 10 2 4 6 8 10 12 14 16 18 20 0 050 t ypical operating characteristics (continued) (v in = 2.5v for max_euk21, v in = 3.2v for max_euk30, and v in = 5.2v for max_euk50, i out = 0, t a = +25?, unless otherwise noted.) 0.1hz to 10hz output noise (v out = 5v) max6129 toc34 1s/div v out 20 v/div noise vs. frequency (v out = 2.048v) max6129 toc35 frequency (khz) noise ( v rms / hz ) 40 30 10 20 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 050 noise vs. frequency (v out = 3v) max6129 toc36 frequency (khz) noise ( v rms / hz ) 40 30 20 10 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 0 050 0.1hz to 10hz output noise (v out = 2.048v) max6129 toc32 1s/div v out 10 v/div 0.1hz to 10hz output noise (v out = 3v) max6129 toc33 1s/div v out 10 v/div turn-on transient (v out = 5v) max6129 toc31 400 s/div 5.2v 5v v in 2v/div v out 2v/div 0 0
max6129 ultra-low-power series voltage reference ______________________________________________________________________________________ 13 applications information input bypassing the max6129 does not require an input bypass capac- itor. for improved transient performance, bypass the input to ground with a 0.1? ceramic capacitor. place the capacitor as close to in as possible. load capacitance the max6129 does not require an output capacitor for stability. the max6129 is stable driving capacitive loads from 0 to 100pf and 0.1? to 10? when sourc- ing current and from 0 to 0.4? when sinking current. in applications where the load or the supply can experi- ence step changes, an output capacitor reduces the amount of overshoot (undershoot) and improves the cir- cuit? transient response. many applications do not require an external capacitor, and the max6129 offers a significant advantage in applications where board space is critical. supply current the quiescent supply current of the series-mode max6129 is very small, 5.25? (max), and is very sta- ble against changes in the supply voltage with only 1.5?/v (max) variation with supply voltage. the max6129 family draws load current from the input volt- age source only when required, so supply current is not wasted and efficiency is maximized at all input volt- ages. this improved efficiency reduces power dissipa- tion and extends battery life. output thermal hysteresis output thermal hysteresis is the change of output volt- age 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 device. temperature coefficient vs. operating temperature range for a 1lsb maximum error in a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. figure 1 shows the maximum allowable reference voltage tem- perature coefficient to keep the conversion error to less than 1lsb, as a function of the operating temperature range (t max - t min ) with the converter resolution as a parameter. the graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. pin description pin name function 1i n positive voltage supply 2 gnd ground 3, 4 n.c. internally connected. leave unconnected or connect to ground. 5 out reference output temperature coefficient (ppm/ c) 110 100 16 bit 14 bit 12 bit 10 bit 8 bit 0.01 0.1 10 100 1000 1 10,000 18 bit 20 bit operating temperature range (t max - t min ) ( c) figure 1. temperature coefficient vs. operating temperature range for a 1lsb maximum error
max6129 in reality, the absolute static accuracy of a data con- verter is dependent on the combination of many para- meters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltage reference changes. turn-on time these devices typically turn on and settle to within 0.1% of their final value in less than 1.4ms. the turn-on time increases when heavily loaded and operating close to dropout. positive and negative low-power voltage reference figure 2 shows a typical method for developing a bipo- lar reference. the circuit uses a max681 voltage dou- bler/inverter charge-pump converter to power a max480, creating a positive as well as a negative refer- ence voltage. ultra-low-power series voltage reference 14 ______________________________________________________________________________________ max681 max6129 v in v cc gnd v+ v- 2v in gnd in out 1m ? 1m ? 10nf max480 v+ +ref output -ref output v- -2v in figure 2. positive and negative references from a single 3v/5v supply
max6129 ultra-low-power series voltage reference ______________________________________________________________________________________ 15 part pin-package output voltage (v) initial accuracy (%) temperature coefficient ( ppm/ c) top mark max6129aeuk21-t 5 sot23-5 2.048 0.4 40 adrm max6129ac/d21 dice 2.048 0.4 40 max6129beuk21-t 5 sot23-5 2.048 1 100 adrn max6129aeuk25-t 5 sot23-5 2.500 0.4 40 adro max6129ac/d25 dice 2.500 0.4 40 max6129beuk25-t* 5 sot23-5 2.500 1 100 adrp max6129aeuk30-t 5 sot23-5 3.000 0.4 40 adrq max6129ac/d30 dice 3.000 0.4 40 max6129beuk30-t 5 sot23-5 3.000 1 100 adrr max6129aeuk33-t 5 sot23-5 3.300 0.4 40 adrw max6129ac/d33 dice 3.300 0.4 40 max6129beuk33-t 5 sot23-5 3.300 1 100 adrx max6129aeuk41-t 5 sot23-5 4.096 0.4 40 adrs max6129ac/d41 dice 4.096 0.4 100 max6129beuk41-t 5 sot23-5 4.096 1 100 adrt max6129aeuk501-t 5 sot23-5 5.000 0.4 40 adru max6129ac/d50 dice 5.000 0.4 40 max6129beuk501-t 5 sot23-5 5.000 1 100 adrv selector guide * future product?ontact factory for availability. chip topography n.c. n.c. gnd n.c. n.c. out n.c. in chip information transistor count: 30 process: bicmos substrate connected to gnd
max6129 ultra-low-power series voltage reference 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. 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. sot-23 5l .eps e 1 1 21-0057 package outline, sot-23, 5l 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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