for free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 _______________general description the max6120 is the lowest-power 1.2v, precision, three-terminal voltage reference offered in a sot23 package. ideal for 3v battery-powered equipment where power conservation is critical, the max6120 is a low-power alternative to existing two-terminal shunt ref- erences. unlike two-terminal references that throw away battery current and require an external series resistor, the max6120 has a 70? maximum supply current (typically only 50?) that is independent of the input voltage. this feature translates to maximum effi- ciency at all battery voltages. the max6120 operates from a supply voltage as low as 2.4v, and initial accuracy is ?% for the sot23 pack- age. output voltage temperature coefficient is typically only 30ppm/?, and is guaranteed to be less than 100ppm/? in the sot23 package. for a guaranteed output voltage temperature coefficient of less than 50ppm/?, see the max6520 data sheet. ________________________applications battery-powered systems portable and hand-held equipment data-acquisition systems instrumentation and process control ____________________________features ? 3-pin sot23 package ? supply current independent of input voltage over temperature ? 50? supply current ? 2.4v to 11v input voltage range ? 30ppm/? typical tempco (sot23) ? ?% initial accuracy (sot23) max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference ________________________________________________________________ maxim integrated products 1 1 2 3 4 8 7 6 5 v in n.c. n.c. n.c. gnd n.c. n.c. v out max6120 so top view 1 2 3 gnd v in v out max6120 sot23 _________________pin configurations ______________ordering information v in gnd v+ 2.4v to 11v 0v 0.1 f v out v out 1.2v max6120 __________typical operating circuit part max6120esa max6120eur -40? to +85? -40? to +85? temp. range pin-package 8 so 3 sot23-3 19-0458; rev 1; 9/96
80 50 2 supply current vs. input voltage max6120 toc-01 input voltage (v) supply current ( a) 8 60 46 70 10 39 57 11 1.20010 1.19990 24 8 output voltage vs. input voltage 1.19995 max6120-02 input voltage (v) output voltage (v) 610 35 9 711 1.20005 1.20000 75 50 -50 supply current vs. temperature max6120 toc-02 temperature (?) supply current ( a) 100 60 55 65 050 70 -25 25 75 v in = 9v v in = 5v v in = 3v __________________________________________typical operating characteristics (v in = 3v, i load = 0ma, t a = +25?, unless otherwise noted.) max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (v in = 2.4v, i load = 0ma, t a = +25?, unless otherwise noted.) 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. supply voltage (v in ) ..............................................-0.3v to +12v v out ............................................................-0.3v to (v in + 0.3v) output short-circuit duration ..........continuous to either supply continuous power dissipation (t a = +70?) sot23 (derate 4mw/? above +70?) ...........................320mw operating temperature range ...........................-40? to +85? storage temperature range .............................-65? to +160? lead temperature (soldering, 10sec) .............................+300? e n parameter symbol min typ max units 10 400 1.188 1.200 1.212 v 230 line regulation v out /v in ?/v 4.3 short-circuit output current i sc 400 ma conditions v in = 2.4v to 11v, t a = t min to t max (note 1) 0.1hz to 10hz 10hz to 10khz v out shorted to gnd v out shorted to v in i q 50 58 quiescent supply current 70 ? t a = +25? t a = t min to t max (note 1) 1.5 5 change in supply current vs. input voltage i q /v in ?/v v in = 2.4v to 11v t a = +25 c ? note 1: production testing done at t a = +25?, over temperature limits guaranteed by parametric correlation data. note 2: contact factory for availability of a higher-grade, lower-tc option in a sot23 package. output voltage noise ?p-p load regulation v out /i out i load = -50? to 400 a (note 1) 0.1 1 ?/? output voltage v out 1.176 1.224 v t a = t min to t max (note 2) max6120eur (sot23) output voltage temperature coefficient tcv out 30 100 ppm/ c max6120eur (sot23), t a = t min to t max (note 2)
max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference _______________________________________________________________________________________ 3 0 -50 load regulation vs. temperature max6120 toc-03 temperature (?) load regulation ( v/ a) 100 0.16 0.08 0.24 050 0.32 -25 25 75 100 80 20 0.001 0.01 1 10 100 power-supply rejection ratio vs. frequency 40 60 max1620 toc-06 frequency (khz) psrr (db) 0.1 1.2001 1.2000 1.1997 1 10 1000 output voltage vs. source current 1.1998 1.1999 max1620 toc-05 source current ( a) output voltage (v) 100 ____________________________typical operating characteristics (continued) (v in = 3v, i load = 0ma, t a = +25?, unless otherwise noted.) 0.1hz to 100hz noise 50 v/div 1 s/div a = output current, 50 a/div, i load = 0 a to -50 a b = output voltage, 100mv/div load-transient response b a 10 s/div a = output current, 500 a/div, i load = 0 a to 500 a b = output voltage, 100mv/div load-transient response b a 10 s/div a = input voltage, 100mv/div, v in = 3v 50mv b = output voltage, 10mv/div line-transient response b a out in 5 s/div
max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference 4 _______________________________________________________________________________________ __________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 the device pin as possible. where transient performance is less important, no capacitor is neces- sary. output bypass the max6120 performs well without an output decou- pling capacitor. if your application requires an output charge reservoir (e.g., to decouple the reference from the input of a dac), then make sure that the total output capacitive load does not exceed 10nf. dac latch a dac a dac latch b dac b dac latch c latch dac c sclk outa outb outc lout din +3v 0.1f v in v out cs refab refc reset v dd v ss gnd 16-bit shift register control (8) data (8) max512 max513 max6120 1 2 1 2 3 4 56 7 8 9 10 11 12 14 3 0.01f figure 1. 3v, triple, 8-bit serial dac figure 2. low-power ?.2v reference +3v -3v v in v out max6120 2 1 3 3 4 6 -1.2v r r +1.2v 2 7 max406a _____________________pin description no connect?ot internally connected n.c. ground gnd 3 reference output v out 2 input voltage v in 1 function name 2, 3, 5, 6, 7 4 pin 1 8 so sot23 ___________________chip information transistor count: 39
max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference _______________________________________________________________________________________ 5 __________________________________________________tape-and-reel information 4.0?.1 4.0?.1 2.0?.05 1.75?.1 ?.5?.1 ?.1?.1 8.0?.2 3.5?.05 ay x x lot specific code marking information note: dimensions are in mm. and follow eia481-1 standard. ics may also be marked with full part name: max6120 ? ? = max6120
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. 6 ___________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1996 maxim integrated products printed usa is a registered trademark of maxim integrated products. max6120 low-cost, micropower, precision, 3-terminal, 1.2v voltage reference ________________________________________________________package information l dim a a1 b c d e e h l s min 0.031 0.001 0.014 0.0034 0.105 0.047 0.070 0.082 0.004 0.017 0? max 0.047 0.005 0.022 0.006 0.120 0.055 0.080 0.098 0.012 0.022 8? min 0.787 0.025 0.356 0.086 2.667 1.194 1.778 2.083 0.102 0.432 0? max 1.194 0.127 0.559 0.152 3.048 1.397 2.032 2.489 0.305 0.559 8? inches millimeters 3-pin sot23-3 small-outline transistor package d e a a1 c b s 21-0051b h e
|
