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MAX44269 1.3mm x 1.3mm, low-power dual comparator ????????????????????????????????????????????????????????????????? maxim integrated products 1 typical application circuit 19-5986; rev 0; 9/11 ordering information appears at end of data sheet. for related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX44269.related . evaluation kit available general description the MAX44269 is an ultra-small and low-power dual comparator ideal for battery-powered applications such as cell phones, notebooks, and portable medical devices that have extremely aggressive board space and power constraints. the comparator is available in a miniature 1.3mm x 1.3mm, 9-bump wlp package, making it the industrys smallest dual comparator. the ic can be powered from supply rails as low as 1.8v and up to 5.5v. it requires just 0.5a of typical supply current per comparator. it has a rail-to-rail input struc - ture and a unique output stage that limits supply current surges while switching. this design also minimizes over - all power consumption under dynamic conditions. the ic has open-drain outputs, making it suitable for mixed voltage systems. the ic also features internal filtering to provide high rf immunity. it operates over a -40c to +85c temperature. applications smartphones notebooks two-cell battery-powered devices battery-operated sensors ultra-low-power systems portable medical mobile accessories features s ultra-low power consumption ? 0.5a per comparator s ultra-small 1.3mm x 1.3mm wlp package s guaranteed operation down to v cc = 1.8v s input common-mode voltage range extends 200mv beyond-the-rails s 6v tolerant inputs independent of supply s open-drain outputs s internal filters enhance rf immunity s crowbar-current-free switching s internal hysteresis for clean switching s no output phase reversal for overdriven inputs v cc v cc v ref v cc v cc gnd out1 out2 connector accessory id remote key MAX44269 v pull v pull for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com. www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 2 MAX44269 1.3mm x 1.3mm, low-power dual comparator v cc to gnd ............................................................. -0.3v to +6v ina+, ina-, inb+, inb- to gnd .............................. -0.3v to +6v continuous input current into any pin ............................ q 20ma maximum power dissipation (derate 11.9mw/ n c at t a = +70 n c) ............................ 952mw output voltage to gnd (out_) .............................. -0.3v to +6v output current (out_) .................................................... q 50ma output short-circuit duration (out_) ....................... continuous operating temperature range .......................... -40 n c to +85 n c storage temperature range ............................ -65 n c to +150 n c junction temperature ..................................................... +150 n c lead temperature (soldering, 10s) ................................ +300 n c soldering temperature (reflow) ...................................... +260 n c wlp junction-to-ambient thermal resistance ( q ja ) .......... 84c/w absolute maximum ratings note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four- layer board. for detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial . stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. package thermal characteristics (note 1) electrical characteristics (v cc = 5v, v gnd = 0v, v in- = v in+ = 1.2v, r pullup = 100k i to v cc , t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted.) (note 2) parameter symbol conditions min typ max units dc characteristics input referred hysteresis v hys (v gnd - 0.2v) p v cm p (v cc + 0.2v) (note 3) 4 6 mv input offset voltage v os v gnd - 0.2v p v cm p v cc + 0.2v (note 4) t a = +25 n c 0.15 5 mv -40 n c p t a p +85 n c 10 input bias current i b t a = +25 n c 0.15 na t a = -40 n c to +85 n c 0.2 output-voltage swing low v ol v cc = 1.8v, i sink = 1ma t a = +25 n c 105 200 mv -40 n c p t a p +85 n c 300 v cc = 5v, i sink = 6ma t a = +25 n c 285 350 -40 n c p t a p +85 n c 450 input voltage range v cm inferred from v os test v gnd - 0.2v v cc + 0.2v v output short-circuit current i sc sinking, v out = v cc v cc = 1.8v 3 ma v cc = 5v 30 output leakage current i leak v cc = 5.5v, v out = 5.5v 0.2 na www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 3 MAX44269 1.3mm x 1.3mm, low-power dual comparator note 2: all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design. note 3: hysteresis is the input voltage difference between the two switching points. note 4: v os is the average of the positive and negative trip points minus v ref . note 5: overdrive is defined as the voltage above or below the switching points. electrical characteristics (continued) (v cc = 5v, v gnd = 0v, v in- = v in+ = 1.2v, r pullup = 100k i to v cc , t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted.) (note 2) parameter symbol conditions min typ max units ac characteristics propagation delay high to low (note 5) t phl input overdrive = q 100mv, v cc = 5v 6 f s input overdrive = q 100mv, v cc = 1.8v 7 input overdrive = q 20mv, v cc = 5v 8 input overdrive = q 20mv, v cc = 1.8v 19 propagation delay low to high (note 5) t plh input overdrive = q 100mv, v cc = 5v 38 f s input overdrive = q 100mv, v cc = 1.8v 13 input overdrive = q 20mv, v cc = 5v 39 input overdrive = q 20mv, v cc = 1.8v 20 fall time t f c load = 15pf 0.2 f s power supply supply voltage range v cc guaranteed from psrr tests 1.8 5.5 v power-supply rejection ratio psrr v cc = 1.8v to 5.5v 60 80 db supply current per comparator i cc v cc = 1.8v, t a = +25 n c 0.4 0.75 f a v cc = 5v, t a = +25 n c 0.5 0.85 v cc = 5v, -40 n c p t a p +85 n c 1 power-up time t on 1 ms www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 4 MAX44269 1.3mm x 1.3mm, low-power dual comparator typical operating characteristics (v cc = 5v, v gnd = 0v, v in- = v in+ = 1.2v, r pullup = 100k ? to v cc , t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) supply current vs. supply voltage MAX44269 toc01 supply voltage (v) supply current (a) 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 0.2 0.4 0.6 0.8 1.0 1.2 0 1.5 6.0 v out = high t a = -40c t a = +85c t a = +25c supply current vs. supply voltage MAX44269 toc02 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 supply voltage (v) supply current (a) 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 6.0 t a = -40c t a = +85c t a = +25c v out = low supply current vs. transition frequency (v overdrive = 20mv) MAX44269 toc03 input frequency (hz) supply current (a) 1k 100 10 2 4 6 8 10 12 14 0 1 10k v cc = 5v v cc = 2.7v v cc = 1.8v input offset voltage vs. temperature MAX44269 toc04 temperature (c) input offset voltage (mv) 80 60 20 40 0 -20 -0.45 -0.40 -0.35 -0.30 -0.25 -0.20 -0.15 -0.10 -0.05 0 -0.50 -40 100 v dd = 2.7v v dd = 5v v dd = 1.8v input bias current vs. temperature MAX44269 toc05 temperature (c) input bias current (na) 80 60 20 40 0 -20 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0 -40 100 v dd = 2.7v v dd = 5v v dd = 1.8v input bias current vs. common-mode voltage MAX44269 toc06 input common-mode voltage (v) input bias current (na) 5 4 2 3 1 0 50 100 150 200 250 300 350 400 450 500 0 -1 6 v dd = 2.7v v dd = 0v v dd = 1.8v v dd = 5v output-voltage low vs. pullup resistance MAX44269 toc07 pullup resistance ( i ) output voltage low (v ol - v ee ) 10k 1k 10 100 1000 10,000 1 100 100k 5 4 3 2 1 short-circuit current vs. supply voltage MAX44269 toc08 short-circuit current (ma) 5 10 15 20 25 30 35 40 0 supply voltage (v) 06 v out = low t a = -40c t a = +85c t a = +25c input offset voltage histogram MAX44269 toc09 input offset voltage (mv) occurrence (%) 2.5 2.0 1.0 1.5 -1.0 -0.5 0 0.5 -1.5 5 10 15 20 25 30 35 40 45 0 -2 www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 5 MAX44269 1.3mm x 1.3mm, low-power dual comparator typical operating characteristics (continued) (v cc = 5v, v gnd = 0v, v in- = v in+ = 1.2v, r pullup = 100k ? to v cc , t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) leakage current vs. temperature MAX44269 toc10 temperature (c) output leakage current (na) 90 70 30 50 -10 10 -30 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0 -50 110 v cc = 5v v cc = 2.7v v cc = 1.8v pullup resistance (i) 100k 10m propagation delay (s) 1m 10k 1k propagation delay vs. pullup resistance MAX44269 toc11 20 40 60 80 100 120 0 t phl t plh propagation delay vs. capacitive load MAX44269 toc12 capacitive load (pf) 800 600 400 200 0 1000 propagation delay (s) 10 20 30 40 50 60 70 80 90 100 0 t phl t plh propagation delay vs. temperature (v overdrive = 100mv, v dd = 5v) MAX44269 toc13 temperature (c) propagation delay (s) 80 60 20 40 0 -20 5 10 15 20 25 30 35 40 45 0 -40 100 t phl t plh input overdrive voltage (mv) propagation delay (s) 800 600 400 200 10 20 30 40 50 60 0 0 1000 propagation delay vs. input overdrive (t plh ) MAX44269 toc14 t a = +25c t a = -40c t a = +85c input overdrive voltage (mv) propagation delay (s) 800 600 400 200 2 4 6 8 10 12 0 0 1000 propagation delay vs. input overdrive (t plh ) MAX44269 toc15 t a = +25c t a = -40c t a = +85c input referred hysteresis vs. temperature MAX44269 toc16 temperature (c) input referred hysteresis (mv) 80 60 20 40 0 -20 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 -40 100 propagation delay 100mv p-p overdrive MAX44269 toc17 v out 500mv/div v in 50mv/div 20s /div propagation delay 20mv p-p overdrive MAX44269 toc18 v out 500mv/div v in 10mv/div 20s /div www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 6 MAX44269 1.3mm x 1.3mm, low-power dual comparator typical operating characteristics (continued) (v cc = 5v, v gnd = 0v, v in- = v in+ = 1.2v, r pullup = 100k ? to v cc , t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted. all devices are 100% production tested at t a = +25 n c. temperature limits are guaranteed by design.) 1khz response 100mv overdrive MAX44269 toc19 v out 1v/div v in 50mv/div 100s /div 1khz response 20mv overdrive MAX44269 toc20 v out 1v/div v in 10mv/div 100s /div power-up response MAX44269 toc21 v in 200mv/div v cc 2v/div v out 2v/div 800s /div no output phase reversal MAX44269 toc22 v in -0.3v to +6v v out 20s /div www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 7 MAX44269 1.3mm x 1.3mm, low-power dual comparator bump description bump configuration pin name function a1 ina- comparator a inverting input a2 ina+ comparator a noninverting input a3 outa comparator a output b1 gnd negative supply voltage. bypass to gnd with a 1.0 f f capacitor. b2 n.c. not connected b3 v cc positive supply voltage. bypass to gnd with a 1.0 f f capacitor. c1 inb- comparator b inverting input c2 inb+ comparator b noninverting input c3 outb comparator b output wlp top view MAX44269 1 ina- ina+ outa gnd n.c. v cc + 23 b c a inb- inb+ outb www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 8 MAX44269 1.3mm x 1.3mm, low-power dual comparator detailed description the MAX44269 is a general-purpose dual comparator for battery-powered devices where area, power, and cost constraints are crucial. the ic can operate with a low 1.8v supply rail typically consuming 0.5a quiescent cur - rent per comparator. this makes it ideal for mobile and very low-power applications. the ics common-mode input voltage range extends 200mv beyond-the-rails. an internal 4mv hysteresis ensures clean output switching, even with slow-moving input signals. input stage structure the input common-mode voltage range extends from (v gnd - 0.2v) to (v cc + 0.2v). the comparator operates at any different input voltage within these limits with low input bias current. input bias current is typically 0.15na if the input voltage is between the supply rails. the ic features a unique input esd structure that can handle voltages from -0.3v to 6v independent of supply voltage. this allows for the device to be powered down with a signal still present on the input without damag - ing the part. this feature is useful in applications where one of the inputs has transient spikes that exceed the supply rails. no output phase reversal for overdriven inputs the ics design is optimized to prevent output phase reversal if both the inputs are within the input common mode voltage range. if one of the inputs is outside the input common-mode voltage range, then output phase reversal does not occur as long as the other input is kept within the valid input common-mode voltage range. this behavior is shown in the no output phase reversal graph in the typical operating characteristics section. open-drain output the ic features an open-drain output, enabling greater control of speed and power consumption in the circuit design. the output logic level is also independent from the input, allowing for simple level translation. rf immunity the ic has very high rf immunity due to on-chip filtering of rf sensitive nodes. this allows the ic to hold its output state even in the presence of high amounts of rf noise. this improved rf immunity makes the ic ideal for mobile wireless devices. application information hysteresis many comparators oscillate in the linear region of opera - tion because of noise or undesired parasitic feedback. this tends to occur when the voltage on one input is equal or very close to the voltage on the other input. the hysteresis in a comparator creates two trip points: one for the rising input voltage and one for the falling input voltage ( figure 1 ). the difference between the trip points is the hysteresis. when the comparators input voltages are equal and the output trips, the hysteresis effectively causes one comparator input to move quickly past the other. this takes the input out of the region where oscil - lation occurs. this provides clean output transitions for noisy, slow-moving input signals. the ic has an internal hysteresis of 4mv. additional hysteresis can be generat - ed with three resistors using positive feedback ( figure 2 ). figure 1. threshold hysteresis band (not to scale) figure 2. adding hysteresis with external resistors thersholds in+ in- out v hyst v th v tl hysteresis band v cc r2 r3 r1 r4 v in v ref gnd out MAX44269 www.datasheet.co.kr datasheet pdf - http://www..net/
????????????????????????????????????????????????????????????????? maxim integrated products 9 MAX44269 1.3mm x 1.3mm, low-power dual comparator use the following procedure to calculate resistor values. 1) select r3. input bias current at in_+ is less than15na. to minimize errors caused by the input bias current, the current through r3 should be at least 1.5a. current through r3 at the trip point is (v ref - v out )/ r3. considering the two possible output states in solv - ing for r3 yields two formulas: r3 = v ref /ir3 and r3 = [(v cc - v ref )/ir3] - r1 use the smaller of the two resulting resistor values. for example, for v cc = 5v, ir3 = -1.5a, r1 = 200k i , and a v ref = 1.24v, the two resistor values are 827k i and 1.5m i . therefore, for r3 choose the standard value of 825k i . 2) choose the hysteresis band required (v hb ). in this example, the v hb = 50mv. 3) calculate r2 according to the following equation: ?? = + ?? ?? + ?? hb cc ref v r2 (r1 r3) x r1) / r 3 (v v for this example, insert the value: 50mv r2 (200k 0.825m ) 9.67k 5 ?? = ?+ ? = ? ?? ?? for this example, choose standard value r2 = 9.76k i . 4) choose the trip point for v in rising (v thr ) in such a way that: hb thr ref cc v v v1 v ?? >+ ?? ?? v thr is the threshold voltage at which the com - parator switches its output from low to high, as v in rises above the trip point. for this example, choose v thr = 3v. 5) calculate r4 as follows: thr ref 1 r4 11 v x r2 r2 r3 v 1 r4 6.93k 3 11 1.24 x 9.76 9.76 825 = ?? ???? ?? ?? ???? ???? ?? = = ? ?? ? ?? ? ?? ?? ? ?? ? ? ?? ? ?? for this example, choose a standard value of 6.98k i . 6) verify the trip voltages and hysteresis as follows: thr ref thf ref cc 111 xr2 vv r2 r3 r4 111 x r2 vv r2 r1 r3 r4 r2 x v r1 r3 ?? ? ?? ?? ? = ++ ?? ? ?? ?? ? ? ?? ?? ? ?? ?? ? ?? ?? ? = ++ ?? ? ?? ?? ? + ? ?? ?? ? ?? ? + the hysteresis network in figure 2 can be simplified if the reference voltage is chosen to be at midrail and the trip points of the comparator are chosen to be symmetrical about the reference voltage. use the circuit in figure 3 if the reference voltage can be designed to be at the center of the hysteresis band. for the symmetrical case, follow the same steps outlined in the paragraph above to calculate the resistor values except that in this case, resistor r4 approaches infinity (open). so in the previous example with v ref = 2.5v, if v thr = 2.525v and v thf = 2.475v then using the above formulas, we get r1 = 200k i , r2 = 9.09k i and r3 = 825k i , r4 = not installed. jack detect the ic can be used to detect peripheral devices connected to a circuit. this includes a simple jack- detect scheme for cell phone applications. the typical application circuit shows how the device can be used in conjunction with an external reference to detect a remote key connection and an accessory id input. the open- drain output of the devices allows the output logic level to be controlled independent of the peripheral devices load, making interfacing and controlling external devices as simple as monitoring a few digital inputs on a micro - controller or codec. figure 3. simplified external hysteresis network if v ref is at the center of the hysteresis band v cc r2 r3 r1 v in v ref gnd out MAX44269 www.datasheet.co.kr datasheet pdf - http://www..net/
???????????????????????????????????????????????????????????????? maxim integrated products 10 MAX44269 1.3mm x 1.3mm, low-power dual comparator logic-level translator due to the open-drain output of the ic, the device can translate between two different logic levels ( figure 4 ). if the internal 4 mv hysteresis is not sufficient, then exter - nal resistors can be added to increase the hysteresis as shown in figure 2 and figure 3 . power-on reset circuit the ic can be used to make a power-on reset circuit as displayed in figure 5 . the positive input provides the ratiometric reference with respect to the power supply and is created by a simple resistive divider. choose reasonably large values to minimize the power consump - tion in the resistive divider. the negative input provides the power-on delay time set by the time constant of the rc circuit formed by r2 and c1. this simple circuit can be used to power up the system in a known state after ensuring that the power supply is stable. diode d1 pro - vides a rapid reset in the event of unexpected power loss. relaxation oscillator the ic can also be used to make a simple relaxation oscillator ( figure 6 ). by adding the rc circuit r5 and c1, a standard schmidt trigger circuit referenced to a set voltage is converted into an astable multivibra - tor. as shown in figure 7 , in- is a sawtooth waveform with capacitor c1 alternately charging and discharging through resistor r5. the external hysteresis network formed by r1 to r4 defines the trip voltages as: t_rise cc t_fall cc r3 x r4 v v r2r3 r2r4 r3r4 r4r5 (r1 r2 r3) r 1r 3 r 4 v v r4r5 (r1 r2 r3) r1r3r4 r2(r1r3 r3r5 r1r5) ?? = ?? ++ ?? ?? ++ ?? + ?? = ?? ++ + ?? ?? + ++ ?? using the basic time domain equations for the charging and discharging of an rc circuit, the logic-high time, logic-low time, and frequency can be calculated as: ?? = ?? ?? ?? t_fall low t_rise v r 5c1 ln t v figure 6. relaxation oscillator figure 5. power-on reset circuit figure 4. logic-level translator v cc r3 r2 r4 r5 r1 gnd out MAX44269 v cc c1 v cc v cc r1 r4 r3 d1 r2 c1 gnd reset MAX44269 v cc v pull v in v ref gnd out r1 MAX44269 www.datasheet.co.kr datasheet pdf - http://www..net/
???????????????????????????????????????????????????????????????? maxim integrated products 11 MAX44269 1.3mm x 1.3mm, low-power dual comparator since the comparators output is open drain, it goes to high impedance corresponding to logic-high. so, when the output is at logic-high, the c1 capacitor charges through the resistor network formed by r1 to r5 as shown in figure 8 . an accurate calculation of t high would have involved applying thevenins theorem to compute the equivalent thevenin voltage (v thevenin ) and thevenin resistance (r thevenin ) in series with the capacitor c1. t high can then be computed using the basic time domain equations for the charging rc circuit as: ?? ? = ?? ?? ? ?? t_rise thevenin high thevenin t_fall thevenin v v r c1 ln t v v [ ] [ ] thevenin cc cc thevenin r (r2 r4) r3 r1 r5 v (r2 r4) r3 v x r4 v (r2 r4) r3 r1 r2 r4 r1 x (r2 r4) r3 r1 = ++ + = + ++ + ++ ?? ? ? ? the t high calculation can be simplified by selecting the component values in such a way that r3 >> r1 and r5 >> r1. this ensures that the output of the comparator goes close to v cc when at logic-high (that is, v thevenin ~ v cc and r thevenin ~ r5). with this selection, t high can be approximated as: ?? ? = ?? ?? ? ?? t_rise cc high t_fall cc v v r 5c1 ln t v v the frequency of the relaxation oscillator is: ( ) ( ) high low cc t_rise t_fall t_rise t_fall cc 11 f vv tt v r 5 c1 1n v v v = = +? ? ? ?? ?? ? ?? simple pwm generation circuit a pulse-width modulated (pwm) signal generator can be made utilizing both comparators in the ic ( figure 9 ). the capacitor/feedback resistor combination on ina- deter - mines the switching frequency and the analog control voltage determines the pulse width. figure 7. relaxation oscillator waveforms figure 9. pwm generator figure 8. charging network corresponding to logic-high output v cc v cc v cc ina- c1 gnd r2 out MAX44269 r3 analog control voltage r6 r1 r5 r4 v t_rise c1 waveform out waveform v t_fall r2 r3 r5 c1 r4 v cc r1 v cc r thevenin v thevenin c1 www.datasheet.co.kr datasheet pdf - http://www..net/
???????????????????????????????????????????????????????????????? maxim integrated products 12 MAX44269 1.3mm x 1.3mm, low-power dual comparator ordering information + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. window detector circuit the ic is ideal for window detectors (undervoltage/over - voltage detectors). figure 10 shows a window detector circuit for a single-cell li+ battery with a 2.9v end-of-life charge, a peak charge of 4.2v, and a nominal value of 3.6v. choose different thresholds by changing the values of r1, r2, and r3. outa provides an active-low under - voltage indication, and outb provides an active-low overvoltage indication. the open-drain outputs of both the comparators are wired or to give an active-high power-good signal. the design procedure is as follows: 1) select r1. the input bias current into inb- is less than 15na, so the current through r1 should exceed 1.5a for the thresholds to be accurate. in this example, choose r1 = 825k i (1.24v/1.5a). 2) calculate r2 + r3. the overvoltage threshold should be 4.2v when v in is rising. the design equation is as follows: oth ref v r2 r3 r1 x 1 v 4.2 825 x 1 1.24 = 1969k ?? ?? += ? ?? ?? ?? ?? ?? ?? ?? = ? ?? ?? ?? ?? ? 3) calculate r2. the undervoltage threshold should be 2.9v when v in is falling. the design equation is as follows: ( ) ( ) ( ) ref uth v r2 (r1 r2 r3)x r1 v 825 1969 x 1.24 / 2.9 825 370k ?? = ++ ? ?? ?? = +? = ? for this example, choose a 374k i standard value 1% resistor. 4) calculate r3: r3 (r2 r3) r2 1969k 374k =1.595m =+? = ?? ? ? for this example, choose a 1.58m i standard value 1% resistor. board layout and bypassing use 1.0 f f bypass capacitors from v cc to gnd. to maxi - mize performance, minimize stray inductance by putting this capacitor close to the v cc pin and reducing trace lengths. figure 10. window detector circuit chip information process: bicmos part temp range pin- package top mark MAX44269ewl+t -40 n c to +85 n c 9 wlp +ajl v cc 5v v in inb+ ina+ v oth = 4.2v v uth = 2.9v ina- inb- gnd r1 r2 r3 gnd outb outa power good MAX44269 ref 1.24v www.datasheet.co.kr datasheet pdf - http://www..net/
???????????????????????????????????????????????????????????????? maxim integrated products 13 MAX44269 1.3mm x 1.3mm, low-power dual comparator 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. 9 wlp w91b1-6 21-0430 refer to application note 1891 www.datasheet.co.kr datasheet pdf - http://www..net/
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 14 ? 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. MAX44269 1.3mm x 1.3mm, low-power dual comparator revision history revision number revision date description pages changed 0 9/11 initial release www.datasheet.co.kr datasheet pdf - http://www..net/

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