general description the max6516?ax6519 low-cost, fully integrated tem- perature switches assert a logic signal when their die temperature crosses a factory-programmed threshold. operating from a 2.7v to 5.5v supply, these devices feature a fixed voltage reference, an analog tempera- ture sensor, and a comparator. they are available with factory-trimmed temperature trip thresholds from -45? to +115? in 10? increments, and are accurate to ?.5? (typ). these devices require no external compo- nents and typically consume 22? of supply current. hysteresis is pin selectable at 2? or 10?. the max6516?ax6519 are offered with hot-tempera- ture thresholds (+35? to +115?), asserting when the temperature is above the threshold, or with cold-tem- perature thresholds (-45? to +15?), asserting when the temperature is below the threshold. these devices provide an analog output proportional to temperature and are stable with any capacitive load up to 1000pf. the max6516?ax6519 can be used over a range of -35? to +125? with a supply voltage of 2.7v to 5.5v. for applications sensing temperature down to -45?, a supply voltage above 4.5v is required. the max6516 and max6518 have an active-high, push-pull output. the max6517 and max6519 have an active-low, open-drain output. these devices are avail- able in a space-saving 5-pin sot23 package and oper- ate over the -55? to +125? temperature range. applications features ? high accuracy 1.5c (max) over -15c to +65c temperature range ? low power consumption22 a typical current ? factory-programmed thresholds from -45c to +115c in 10c increments ? analog output to allow board-level testing ? open-drain or push-pull outputs ? pin-selectable 2c or 10c hysteresis max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 ________________________________________________________________ maxim integrated products 1 ordering information max6517 v cc gnd microcontroller int adc in v cc v cc gnd hyst out tover 0.1 f 100k typical operating circuit 19-3007; rev 1; 2/11 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part temp range pin-package max6516 uk_ _ _ _+t -55c to +125c 5 sot23 max6517 uk_ _ _ _+t -55c to +125c 5 sot23 max6518 uk_ _ _ _+t -55c to +125c 5 sot23 max6519 uk_ _ _ _+t -55c to +125c 5 sot23 gnd v cc hyst 15 out (max6516) max6517 sot23 top view 2 34 (tover) tover gnd v cc hyst 15 out (max6516) max6517 sot23 2 34 (tunder) tunder gnd v cc out 15 hyst (max6518) max6519 sot23 2 34 (tover) tover gnd v cc out 15 hyst (max6518) max6519 sot23 2 34 (tunder) tunder pin configurations fan control test equipment temperature control temperature alarms over/undertemperature protection notebook, desktop pcs raid servers note: these parts are offered in 16 standard temperature ver- sions with a minimum order of 2500 pieces. to complete the suffix information, add p or n for positive or negative trip tem- perature, and select an available trip point in degrees centi- grade. for example, the max6516ukp065+t describes a max6516 in a 5-pin sot23 package with a +65? threshold. contact the factory for pricing and availability. + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. functional diagram appears at end of data sheet.
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 2.7v to 5.5v, r pullup = 100k (open-drain output only), t a = -55? to +125?, unless otherwise noted. typical values are at t a = +25?.) (note 1) 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: 100% production tested at t a = +25?. specifications over temperature are guaranteed by design. note 2: the max6516?ax6519 are available with internal factory-programmed temperature trip thresholds from -45? to +115? in 10? increments. note 3: v cc must be greater than 4.5v for a switching threshold of -45?. note 4: guaranteed by design. all voltages are referenced to gnd. v cc ...........................................................................-0.3v to +6v tover , tunder (open drain)................................ -0.3v to +6v tover, tunder (push-pull) .................... -0.3v to (v cc + 0.3v) out, hyst .................................................-0.3v to (v cc + 0.3v) out short to gnd .........................................................indefinite continuous power dissipation (t a = +70?) sot23 (derate 3.1mw/? above +70?) .....................247mw operating temperature range ........................-55? to +125? junction temperature ..................................................... +150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) ................................ +300? soldering temperature (reflow) .......................................+260? parameter symbol conditions min typ max units supply voltage range v cc 2.7 5.5 v hot-temperature thresholds (+35? to +115?) 22 40 supply current i cc cold-temperature thresholds (-45? to +15?) 40 ? -15 c to +65 c -1.5 +1.5 +75 c to +115 c -2.5 +2.5 temperature threshold accuracy (note 2) t th -45 c to -25 c (note 3) -3 +3 c hyst = v cc 2 temperature threshold hysteresis t hyst hyst = gnd 10 c v ih 0.8 x v cc hyst input logic level (note 4) v il 0.2 x v cc v i source = 500?, v cc > 2.7v 0.8 x v cc logic output voltage high (push-pull) v oh i source = 800?, v cc > 4.5v v cc - 1.5 v i sink = 1.2ma, v cc > 2.7v 0.3 logic output voltage low (push-pull and open drain) v ol i sink = 3.2ma, v cc > 4.5v 0.4 v open-drain output leakage current v cc = 2.7v, open-drain output = 5.5v 10 na out temperature sensitivity -30 c to +125 c, v cc = 2.7v to 5.5v -2 +2 error to equation: out = 1.8015v - 10.62mv(t - 30) - 1.1? (t - 30) 2 -55 c to -30 c (note 3) -5 +2 c sensor gain -10.62 mv/ c out capacitive load (note 4) 1000 pf 0 < i out < 40? 0.24 out load regulation -1? < i out < 0 0.02 ? out line regulation 0.04 0.3 ?/v
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 _______________________________________________________________________________________ 3 trip-threshold accuracy max6516 toc01 accuracy ( c) percentage of parts sampled (%) 0.5 to 0.75 0 to 0.25 -0.25 to -0.5 -0.75 to -1.0 -1.25 to -1.5 10 20 30 40 50 0 1.0 to 1.25 sample size = 147 output voltage vs. temperature max6516 toc02 temperature ( c) v out (v) 105 85 45 65 -15 5 25 -35 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 0.50 -55 125 temperature error vs. temperature max6516 toc03 temperature ( c) temperature error ( c) 105 85 65 45 25 5 -15 -35 -1 0 1 2 -2 -55 125 supply current vs. temperature max6516 toc04 temperature ( c) supply current ( a) 105 85 65 45 25 5 -15 -35 5 10 15 20 25 30 0 -55 125 output voltage vs. supply voltage max6516 toc05 supply voltage (v) v out (v) 5.0 4.5 4.0 3.5 3.0 1.7850 1.7900 1.7950 1.8000 1.8050 1.8100 1.8150 1.8200 1.8250 1.8300 1.7800 2.5 5.5 t a = +30 c tover/tunder output voltage high vs. source current max6516 toc06 i sink (ma) v oh (v) 9 8 7 6 5 4 3 2 1 1 2 3 4 5 0 010 tover/tunder output voltage low vs. source current max6516 toc07 i sink (ma) v ol (v) 9 8 7 6 5 4 3 2 1 100 200 300 400 500 0 010 thermal step response in perflourinated fluid max6516 toc08 +25 c +18.5 c/div +100 c 2s/div thermal step response in still air max6516 toc09 +25 c +18.5 c/div +100 c 10s/div typical operating characteristics (v cc = 5v, t a = +25?, unless otherwise noted.)
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 4 _______________________________________________________________________________________ pin description startup and power-down (temp < t th ) max6516 toc10 v cc (5v/div) tover (5v/div) v out (5v/div) 200 s/div max6516 toc11 startup delay (temp > t th ) v cc (5v/div) tover (5v/div) v out (5v/div) 200 s/div typical operating characteristics (continued) (v cc = 5v, t a = +25?, unless otherwise noted.) pin max6516 max6517 max6518 max6519 name function 1 1 3 3 out analog output. voltage represents the die? temperature. 2 2 2 2 gnd ground 3 3 1 1 hyst hysteresis input. connect to v cc for 2 c of hysteresis or to gnd for 10 c hysteresis. 4444v cc input supply. bypass to ground with a 0.1? capacitor. 5 5 tover push-pull active-high output (hot threshold). tover goes high when the die temperature exceeds the factory-programmed hot temperature threshold. ? 5 tover open-drain, active-low output (hot threshold). tover goes low when the die temperature exceeds the factory-programmed hot temperature threshold. connect to a 100k pullup resistor. may be pulled up to a voltage higher than v cc . 5 5 tunder push-pull active-high output (cold threshold). tunder goes high when the die temperature falls below the factory-programmed cold temperature threshold. ? 5 tunder open-drain, active-low output (cold threshold). tunder goes low when the die temperature goes below the factory-programmed cold temperature threshold. connect to a 100k pullup resistor. may be pulled up to a voltage higher than v cc .
detailed description the max6516?ax6519 fully integrated temperature switches incorporate a fixed reference, an analog tem- perature sensor, and a comparator. the temperature at which the two reference voltages are equal determines the temperature trip point. out is an analog voltage that varies with the die? temperature. pin-selectable 2? or 10? hysteresis keeps the digital output from oscillating when the die temperature approaches the threshold temperature. the max6516 and max6518 have an active-high, push-pull output structure that can sink or source current. the max6517 and max6519 have an active-low, open-drain output structure that can only sink current. the internal power-on reset cir- cuit guarantees the logic output is at its +25? state for at least 50?. analog output out is an analog output that is proportional to the die temperature. out voltage range is between 0.77v to 2.59v, within the temperature range of -45? to +125?. for applications with a switching threshold of -45?, the supply voltage must be greater than 4.5v. the temperature-to-voltage transfer function is approxi- mately linear and can be described by the quadratic equation: v out = 1.8015 - 10.62mv (t - 30) + 1.1? (t - 30) 2 where t = temperature in ?. in most cases, a linear approximation can be applied: v out = 1.8015 - 10.62mv (t - 30) therefore, hysteresis input the hyst input selects the devices?temperature hys- teresis and prevents the output from oscillating when the temperature approaches the trip point. connect hyst to v cc for 2? hysteresis or to gnd for 10? hysteresis. logic temperature indicators overtemperature indicator (hot thresholds) tover and tover designations apply to thresholds above t a = +25? (+35?, +45?, +55?, +65?, +75?, +85?, +95?, +105?, +115?). all ?ot?thresholds are positive temperatures. the overtemperature indicator output is open-drain active low ( tover ) or push-pull active high (tover). tover goes low when the die temperature exceeds the factory-programmed temperature threshold. tover should be pulled up to a voltage no greater than 5.5v with a 100k pullup resistor. tover is a push-pull active-high cmos output that goes high when the die temperature exceeds the factory-programmed temper- ature threshold. undertemperature indicator (cold thresholds) tunder and tunder designations apply to thresholds below t a = +25? (+15?, +5?, -5?, -15?, -25?, -35?, -45?). the undertemperature indicator output is open drain, active low ( tunder ), or push-pull active high (tunder). tunder goes low when the die tem- perature goes below the factory-programmed tempera- ture threshold. tunder should be pulled up to a voltage no greater than 5.5v with a 100k pullup resis- tor. tunder is a push-pull active-high cmos output that goes high when the die temperature falls below the factory-programmed temperature threshold. applications information temperature-window alarm the max6516/max6518 logic outputs assert when the die temperature is outside the factory-programmed range. combining the outputs of two devices creates an over/undertemperature alarm. two max6516s or two max6518s are used to form two complementary pairs, containing one cold trip-point output and one hot trip-point output. the assertion of either output alerts the system to an out-of-range temperature. the max6516 push-pull output stages can be ored to produce a thermal out-of-range alarm (figure 1). more favorably, two max6517s or two max6519s can be directly wire-ored with a single external resistor to accomplish the same task. the temperature window alarms shown in figure 2 can be used to accurately determine when a device? temperature falls out of the -5? to +75? range. the thermal overrange signal can be used to assert a thermal shutdown, power-up, recalibration, or other temperature-dependent function. t v c out =+ ? 1 8015 0 01062 30 . . max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 _______________________________________________________________________________________ 5
max6516?ax6519 low-cost, fail-safe temperature in high-performance/high-reliability applications, multi- ple temperature monitoring is important. the high-level integration and low cost of the max6516 and max6518 facilitate the use of multiple temperature monitors to increase system reliability. the application in figure 3 uses two max6516s with different hot temperature thresholds to ensure that fault conditions that can overheat the monitored device cause no permanent damage. the first temperature monitor activates the fan when the die temperature exceeds +45?. the second max6516 triggers a system shutdown if the die temperature reaches +75?, preventing damage from a wide variety of destructive fault conditions, including latchups, short circuits, and cooling-system failures. pc board testing the max6516?ax6519 temp sensor devices can be tested after pc board assembly using out. testing can be used to verify proper assembly and functionality of the temperature protection circuitry. since out has a weak drive capability, the voltage at out can be forced to cause the digital outputs to change states, thereby verifying that the internal comparators and out- put circuitry function properly after assembly. below is a test procedure that can be used to test the max6516?ax6519: power up the device, measure out, and observe the state of the logic output. low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 6 _______________________________________________________________________________________ max6516ukp075 v cc hyst gnd tover tunder max6516ukn005 v cc hyst gnd 5v overtemp undertemp out of range out out figure 1. temperature-window alarms using the max6516 max6517ukp075 max6517ukn005 v cc gnd tunder v cc 5v gnd hyst hyst out tover out 100k out of range figure 2. temperature window alarm using the max6517 max6516ukp075 gnd 5v hyst out tover system shutdown v cc max6516ukp045 gnd out tover fan control v cc hyst gnd p heat heat figure 3. low-power, high-reliability, fail-safe temperature monitor
calculate the temperature using the formula: verify that the temperature measured is within ?? of the ambient board temperature. measure the ambient board temperature using an accurate cali- brated temperature sensor. connect out to ground (out to v cc for cold threshold versions) and observe the state change of the logic output. disconnect out from ground and observe that the logic output reverts to its initial state. hysteresis testing the max6516?ax6519 can be programmed with 2? or 10? of hysteresis by pin strapping hyst to v cc or gnd, respectively. below is a test feature that can be used to measure the accuracy of the device? hystere- sis using a device with a +65? threshold: power up the device and observe the state of the digital output. drive the out voltage down gradually. when the digital output changes state, note v out . ? out trip = v out at logic output change of state (high to low or low to high). calculate trip temperature (t1) using: gradually raise v out until the digital output reverts to its initial state and note v out . calculate trip temperature (t2). ? hyst = t2 - t1. thermal considerations the max6516?ax6519 supply current is typically 22?. when used to drive high-impedance loads, the devices dissipate negligible power. therefore, the die tempera- ture is essentially the same as the package temperature. accurate temperature monitoring depends on the thermal resistance between the device being monitored and the max6516?ax6519 die. heat flows in and out of plastic packages, primarily through the leads. pin 2 of the 5-pin sot23 package provides the lowest thermal resistance to the die. short, wide copper traces between the max6516?ax6519 and the object whose temperature is being monitored ensures heat transfers occur quickly and reliably. the rise in die temperature due to self-heat- ing is given by the following formula: t j = p dissipation ? ja where p dissipation is the power dissipated by the max6516?ax6519, and ja is the thermal resistance of the package. the typical thermal resistance is 140?/w for the 5-pin sot23 package. to limit the effects of self- heating, minimize the output current. for example, if the max6516?ax6519 sink 1ma, the open-drain output voltage is guaranteed to be less than 0.3v. therefore, an additional 0.3mw of power is dissipated within the ic. this corresponds to a 0.042? shift in the die tem- perature in the 5-pin sot23 package. chip information process: bicmos t v out =+ ? 1 8015 0 01062 30 . . t v out =+ ? 1 8015 0 01062 30 . . max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 _______________________________________________________________________________________ 7
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 8 _______________________________________________________________________________________ table 1. top marks part top mark part top mark max6516ukn045 aehs max6518ukn045 aell max6516ukn035 aecz max6518ukn035 aedd max6516ukn025 aehr max6518ukn025 aelk max6516ukn015 aehq max6518ukn015 aelj max6516ukn005 aehp max6518ukn005 aeli max6516ukp005 aeht max6518ukp005 aelm max6516ukp015 aehu max6518ukp015 aeln max6516ukp035 aehv max6518ukp035 aelo max6516ukp045 aehw max6518ukp045 aelp max6516ukp055 aehx max6518ukp055 aelq max6516ukp065 aehy max6518ukp065 aelr max6516ukp075 aeda max6518ukp075 aede max6516ukp085 aehz max6518ukp085 aels max6516ukp095 aeia max6518ukp095 aelt max6516ukp105 aeib max6518ukp105 aelu max6516ukp115 aeic max6518ukp115 aelv max6517ukn045 aelz max6519ukn045 aeig max6517ukn035 aedb max6519ukn035 aedf max6517ukn025 aely max6519ukn025 aeif max6517ukn015 aelx max6519ukn015 aeie max6517ukn005 aelw max6519ukn005 aeid max6517ukp005 aema max6519ukp005 aeih max6517ukp015 aemb max6519ukp015 aeii max6517ukp035 aemc max6519ukp035 aeis max6517ukp045 aemd max6519ukp045 aeik max6517ukp055 aeme max6519ukp055 aeil max6517ukp065 aemf max6519ukp065 aeim max6517ukp075 aedc max6519ukp075 aedg max6517ukp085 aemg max6519ukp085 aein max6517ukp095 aemh max6519ukp095 aeio max6517ukp105 aemi MAX6519UKP105 aeip max6517ukp115 aemj max6519ukp115 aeiq package information for the latest package outline information and land patterns (footprints), 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. package type package code outline no. land pattern no. 5 sot23 u5+2 21-0057 90-0174
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 _______________________________________________________________________________________ 9 max6517/ max6519 hyst network fixed reference negative tempco reference tunder hyst out cold t th +25 c hot v tunder max6517/max6519 (cold threshold) with 100k pullup max6516/ max6518 hyst network fixed reference negative tempco reference hyst out tunder cold t th +25 c hot v tunder max6516/max6518 (cold threshold) temp temp max6517/ max6519 hyst network fixed reference negative tempco reference tover hyst out cold +25 ct th hot v tover max6517/max6519 (hot threshold) with 100k pullup max6516/ max6518 hyst network fixed reference negative tempco reference hyst out tover cold +25 ct th hot v tover max6516/max6518 (hot threshold) temp temp functional diagram
max6516?ax6519 low-cost, 2.7v to 5.5v, analog temperature sensor switches in a sot23 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. 10 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 11/03 initial release 1 2/11 changed the leaded parts to lead(pb)-free parts in the ordering information table; in the absolute maximum ratings section changed the continuous power dissipation numbers (7.1mw/c to 3.1mw/c and 571mw to 247mw); added the package information table 1, 2, 8
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