general description the max6613 is a low-power precision analog output temperature sensor in a tiny 5-pin sc70 package. the max6613 operates over a 1.8v to 5.5v supply voltage range, with a typical current consumption of only 7.5?. it is particularly well suited for portable applications where minimizing battery cost and maximizing useful battery life are crucial. the max6613 provides an analog voltage output pro- portional to temperature. accuracy is ?.0? (max) over a range of t a = 0? to +50? and ?.4? (max) from t a = -20? to +80?. self-heating effects are neg- ligible due to the low current consumption of the part. unlike many analog temperature sensors, the max6613 is stable with any capacitive load from 0pf to 1000pf, providing broad flexibility in board-level design. the operating temperature range varies with the volt- age supply. the max6613 can be used over a -55? to +130? range with a 2.5v to 5.5v supply voltage. for applications with a supply voltage of 1.8v, the max6613 can be used over a +25? to +130? tem- perature range. applications features ? 1.8v to 5.5v supply voltage ? 4.0c accuracy ? low supply consumption, 7.5 a (typ) ? -55c to +130c temperature range ? sc70 package ? pin compatible to lm20 max6613 low-voltage analog temperature sensor in an sc70 package ________________________________________________________________ maxim integrated products 1 19-2477; rev 3; 12/10 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range pin- package top mark MAX6613MXK+t -55c to +130c 5 sc70-5 adj MAX6613MXK/v+t -55c to +130c 5 sc70-5 adj v cc gnd vout 100pf 0.1 f microcontroller v cc gnd adc in gnd v cc max6613 typical application circuit gnd out 15 gnd n.c. + max6613 sc70 top view 2 34 v cc pin configuration cellular phones gps equipment medical instruments battery management appliances disk drives printers fax machines hvac + denotes a lead(pb)-free/rohs-compliant package. /v denotes an automotive qualified part.
max6613 low-voltage analog temperature sensor in an sc70 package 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. note 1: all parameters tested at room temperature. values through temperature limits are guaranteed by design. note 2: v out = -0.0000022 ? t 2 - 0.01105 ? t + 1.8455 (t = temperature in degrees celsius). note 3: guaranteed by design to 3 sigma. note 4: guaranteed by design. (all voltages referenced to gnd, unless otherwise noted.) v cc to gnd ..............................................................-0.3v to +6v all other pins to gnd.................................-0.3v to (v cc + 0.3v) out short to gnd......................................................continuous output current ....................................................-1ma to +50ma esd protection (human body model)................................2000v continuous power dissipation (t a = +70?) 5-pin sc70 (derate 3.1mw/? above +70?) ...........246.9mw operating temperature range .........................-55 c to +130 c junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering 10s) ..................................+300? soldering temperature (reflow) .......................................+260? dc electrical characteristics (v cc = 1.8v to 5.5v, t a = -55? to +130?. typical values are at t a = +25?, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units v cc = 2.7v, t a = 0? to +50? -4 +4 v cc = 2.7v, t a = -20? to +85? -4.4 +4.4 v cc = 2.7v, t a = -55? to +100? -4.5 +4.5 v cc = 2.7v, t a = +100? to +125? -4.7 +4.7 temperature-to-voltage error (notes 2, 3) v cc = 2.7v, t a = +125? to +130? -5 +5 ? output voltage t a = 0? 1.8455 v nonlinearity t a = -55? to +100? 0.4 % sensor gain (temperature sensitivity or average slope) t a = -20? to +100? (note 3) -10.98 -11.23 -11.47 mv/ c 0 < i l < 16?, t a = -55? to +125? 160 maximum output impedance 0 < i l < 16?, t a = +125? to +130? 300 0 < i l < 16?, t a = -55? to +125? -2.5 load regulation 0 < i l < 16?, t a = 125? to 130? -4.8 mv t a = -20? to +130?, v cc 5.5v 1 3.3 t a = -55? to -20?, v cc 4.5v 1 4.7 supply sensitivity (note 3) t a = -55? to -20?, v cc 5.5v 1 mv/v quiescent current i q no load 7.5 13 ? capacitive load no sustained oscillations for capacitive loads in this range (note 4) 0 1000 pf long-term stability t a = room temperature for 1000hr (note 4) 0.1 c temperature coefficient of supply current 15 na/ c power-down supply current v cc < 0.8v 0.1 ?
max6613 low-voltage analog temperature sensor in an sc70 package _______________________________________________________________________________________ 3 typical operating characteristics (r l = , t a = +30 c, unless otherwise noted.) step response from +25 c to +125 c max6613 toc05 1.55v 430mv 1s/div 200mv/div v out supply current vs. temperature max6613 toc04 temperature ( c) supply current ( a) 110 95 65 80 -10 5 20 35 50 -25 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 5.0 -40 125 v cc = 2.7v v cc = 5v v cc = 3.3v supply current vs. supply voltage max6613 toc03 supply voltage (v) supply current ( a) 5.0 4.0 1.0 2.0 3.0 1 2 3 4 5 6 7 8 9 10 0 0 6.0 output voltage vs. supply voltage max6613 toc02 supply voltage (v) output voltage (v) 5.0 4.0 3.0 2.0 1.0 1.482 1.484 1.486 1.488 1.490 1.492 1.494 1.496 1.498 1.500 1.502 1.504 1.506 1.508 1.510 1.480 0 6.0 output voltage vs. temperature max6613 toc01 temperature ( c) output voltage (v) 110 95 80 65 50 35 20 5 -10 -25 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 0.4 -40 125 pin name function 1 n.c. no connection. must be connected to ground or left unconnected. 2 gnd ground. should be connected to pin 5. may be left unconnected, if desired. 3 out voltage output 4 v cc supply voltage. bypass to gnd with a 0.1f capacitor. 5 gnd ground pin description
max6613 detailed description the max6613 analog output temperature sensor? out- put voltage is a discrete function of its die temperature. the maximum supply current is 13?, and the supply voltage range is from 2.5v to 5.5v for the -55? to +130? temperature range, or 1.8v to 5.5v for the +25? to +130? temperature range. transfer function the temperature-to-voltage transfer function is approxi- mately linear and can be described by the quadratic equation: v out = -0.0000022 ? t 2 - 0.01105 ? t + 1.8455v in many cases, a linear approximation can be applied: v out = -0.01123 ? t + 1.8455v where t is the die temperature of the max6613 in ?. therefore: t = (1.8455 - v out ) / 0.01123v compatibility with other temperature sensors the max6613 can be used to replace temperature sen- sors using other output algorithms. table 1 provides information for a linear and quadratic output equation. contact the factory for performance information about another equation. low-voltage analog temperature sensor in an sc70 package 4 _______________________________________________________________________________________ table 1. linear and quadratic output equation parameter symbol conditions min typ max units v cc = 2.7v, t a = -55? 0.6 7.9 v cc = 2.7v, t a = -20? -0.4 +5.8 v cc = 2.7v, t a = 0? -0.9 +4.5 v cc = 2.7v, t a = +50? -2.6 +3.0 v cc = 2.7v, t a = +85? -3.6 +3.5 v cc = 2.7v, t a = +100? -4.0 +3.7 v cc = 2.7v, t a = +125? -4.8 +4.2 temperature error based on: out = 1.8639 - 0.0115 x temp (note 4) v cc = 2.7v, t a = +130? -5.1 +4.2 ? v cc = 2.7v, t a = -55? -0.4 +6.9 v cc = 2.7v, t a = -20? -0.6 +5.7 v cc = 2.7v, t a = 0? -0.9 +4.5 v cc = 2.7v, t a = +50? -3.5 +2.1 v cc = 2.7v, t a = +85? -6.1 +1.0 v cc = 2.7v, t a = +100? -7.4 +0.4 v cc = 2.7v, t a = +125? -10.1 -1.0 temperature error based on: out = 1.8639 - 0.0115 x temp - 0.00000388 x temp 2 (note 4) v cc = 2.7v, t a = +130? -10.8 -1.5 ?
applications information sensing circuit board and ambient temperature a temperature sensor ic like the max6613 that senses its own die temperature must be mounted on, or close to, the object whose temperature it is intended to mea- sure. because there is a good thermal path between the package? metal lead and the ic die, the max6613 can accurately measure the temperature of the circuit board to which it is soldered. if the sensor is intended to measure the temperature of a heat-generating com- ponent on the circuit board, it should be mounted as close as possible to that component and should share supply and ground traces (if they are not noisy) with that component where possible. this optimizes the thermal connection from the component to the sensor. the thermal path between the plastic package and the die is not as good as the path through the lead, so the max6613, like all temperature sensors in plastic pack- ages, is less sensitive to the temperature of the sur- rounding air than to the temperature of its leads. it can be successfully used to sense ambient temperature if the circuit board is designed to track the ambient tem- perature. as with any ic, the wiring and circuits must be kept insulated and dry to avoid leakage and corrosion, especially if the part is operated at cold temperatures where condensation can occur. the change in die temperature introduced by the part due to self-heating is negligible. chip information process: bicmos package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. max6613 low-voltage analog temperature sensor in an sc70 package _______________________________________________________________________________________ 5 package type package code outline no. land pattern no. 5 sc70 x5+1 21-0076 90-0188
max6613 low-voltage analog temperature sensor in an sc70 package 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 2010 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 5/02 initial release 1 11/03 fix error in equation 4 2 1/06 update spec in table 2 3 12/10 add lead-free and automotive part, style edits 1, 2, 3, 5, 6
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