max2659 gps/gnss low-noise amplifier evaluation kit available 19-0797; rev 4; 8/11 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maximintegrated.com. general description the max2659 high-gain, low-noise amplifier (lna) isdesigned for gps, galileo, and glonass applications. designed in maxim? advanced sige process, the device achieves a 20.5db gain and an ultra-low-noise figure of 0.8db while maximizing the input-referred 1db compression point and the 3rd-order intercept point at -12dbm and -5dbm, respectively. the max2659 operates from a +1.6v to +3.6v single supply and consumes only 4.1ma. the shutdown fea- ture in the device reduces the supply current to be less than 1?. the max2659 is available in a very small, lead-free, rohs-compliant, 1.5mm x 1.0mm x 0.75mm, 6-pin ?fn package. . applications automotive navigationlocation-enabled mobile devices telematics (asset tracking and management) personal navigation device (pnd) cellular phones with gps notebook pc/ultra-mobile pc recreational, marine navigation avionics features ? high-power gain: 20.5db ? ultra-low-noise figure: 0.8db ? integrated 50 ? output matching circuit ? low supply current: 4.1ma ? wide supply voltage range: 1.6v to 3.6v ? low bill of materials ? small footprint: 1.5mm x 1.0mm ? thin profile: 0.75mm ? lead-free and rohs-compliant package 1 2 3 65 4 rfin gnd + gnd rfout bias shdn rfoutput logiccontrol v cc rf input l1 = 6.8nhc1 = 470pf c2 = 33nf l1 c1 c2 v cc max2659 pin configuration/functional diagram/typical application circuit ordering information + denotes a lead(pb)-free/rohs-compliant package. /v denotes an automotive qualified part. part temp range pin-package max2659elt+ -40c to +85c 6 dfn max2659elt/v+ -40c to +85c 6 dfn visit www.maximintegrated.com/products/patents for product patent marking information. downloaded from: http:///
max2659 gps/gnss low-noise amplifier 2 maxim integrated absolute maximum ratings dc electrical characteristics(max2659 ev kit; v cc = 1.6v to 3.6v, t a = -40? to +85?, no rf signals are applied. typical values are at v cc = 2.85v and t a = +25?, unless otherwise noted.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation 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. note 1: min and max limits guaranteed by test at t a = +25? and guaranteed by design and characterization at t a = -40? and t a = +85?. note 2: guaranteed by design and characterization. note 3 : measured with the two tones located at 5mhz and 10mhz offset from the center of the gps band with -40dbm/tone. note 4: measured with a tone located at 5mhz offset from the center of the gps band. v cc to gnd ...........................................................-0.3v to +4.2v other pins to gnd except rfin .....-0.3v to (+ operating v cc + 0.3v) rfin to gnd .........................................................................+1v maximum rf input power .............................................+10dbm continuous power dissipation (t a = +70?) 6-pin ?fn (derates 2.1mw/? above +70?)............167mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +160? lead temperature (soldering, 10s) .................................+260? soldering temperature (reflow) .......................................+260? parameter conditions min typ max units supply voltage 1.6 2.85 3.6 v shdn = high 4.1 5.6 ma supply current shutdown mode, shdn = low 1 a digital input-logic high 1.1 v digital input-logic low 0.4 v digital input current 1 a rfin dc voltage shdn = high 0.83 v ac electrical characteristics(max2659 ev kit; v cc = 1.6v to 3.6v, t a = -40? to +85?, f rfin = 1575.42mhz. typical values are at v cc = 2.85v and t a = +25?, unless otherwise noted.) (note 1) parameter conditions min typ max units rf frequency l1 band 1575.42 mhz v cc = 2.85v 17 20.5 power gain v cc = 1.6v 16.5 20.5 db noise figure (note 2) 0.8 db 3rd-order input intercept point (note 3) -5 dbm input 1db compression point (note 4) -12 dbm input return loss (note 2) 10 15 db output return loss (note 2) 10 25 db reverse isolation (note 2) 32 db caution! esd sensitive device downloaded from: http:///
gps/gnss low-noise amplifier supply current vs. supply voltage max2659 toc01 supply voltage (v) supply current (ma) 3.0 3.2 2.6 2.4 2.2 3.7 3.9 4.1 4.3 4.53.5 1.6 1.8 2.0 3.4 2.8 +85 c +25 c -40 c gain vs. rf frequency max2659 toc02 rf frequency (mhz) gain (db) 2000 2250 1750 1250 1500 750 1000 -5 0 5 10 15 20 25 -10 500 2500 gain vs. supply voltage max2659 toc03 supply voltage (v) gain (db) 2.8 3.0 2.6 2.2 2.4 1.8 2.0 20.2 20.4 20.6 20.8 21.020.0 1.6 3.4 3.2 noise figure vs. temperature max2659 toc04 temperature ( c) noise figure (db) 35 60 10 -15 0.2 0.4 0.80.6 1.0 1.2 0 -40 85 noise figure vs. supply voltage max2659 toc05 supply voltage (v) noise figure (db) 2.8 2.4 2.0 0.2 0.4 0.80.6 1.0 1.2 0 1.6 3.0 3.2 2.6 2.2 1.8 3.4 input return loss vs. rf frequency max2659 toc06 rf frequency (mhz) input return loss |s11| (db) 1750 1250 1000 -25 -20 -10-15 -5 0 -30 500 2000 2250 1500 750 2500 output return loss vs. rf frequency max2659 toc07 rf frequency (mhz) output return loss |s22| (db) 1750 1250 1000 -40 -35 -30 -25 -20 -10-15 -5 0 -45 500 2000 2250 1500 750 2500 reverse isolation vs. rf frequency max2659 toc08 rf frequency (mhz) reverse isolation |s12| (db) 1750 1250 1000 -70 -60 -50 -30-40 -20-80 500 2000 2250 1500 750 2500 iip3 vs. temperature max2659 toc09 temperature ( c) iip3 (dbm) 35 10 -15 -6.0 -5.5 -5.0 -4.0-4.5 -3.5-6.5 -40 60 85 two tones located at 5mhz and10mhz offset with -40dbm/tone typical operating characteristics (max2659 ev kit; typical values are at v cc = 2.85v, t a = +25?, and f rfin = 1575.42mhz, unless otherwise noted.) max2659 3 maxim integrated downloaded from: http:///
typical operating characteristics (continued) (max2659 ev kit; typical values are at v cc = 2.85v, t a = +25?, and f rfin = 1575.42mhz, unless otherwise noted.) iip3 vs. supply voltage max2659 toc10 supply voltage (v) iip3 (dbm) 2.6 2.8 2.4 2.2 2.0 1.8 -7 -6 -4-5 -3-8 1.6 3.0 3.2 3.4 two tones located at 5mhz and10mhz offset with -40dbm/tone input p1db compression vs. temperature max2659 toc11 temperature ( c) p1db compression (dbm) 35 10 -15 -14 -13 -10-11 -12 -9 -15 -40 60 85 input p1db compression vs. supply voltage max2659 toc12 supply voltage (v) p1db compression (dbm) 2.8 2.4 2.6 1.8 2.0 2.2 -18 -16 -10-12 -14 -8 -20 1.6 3.0 3.2 3.4 input p1db compression vs. jammer frequency max2659 toc13 jammer frequency (mhz) p1db compression (dbm) 1750 1500 750 1000 1250 -25 -20 -5 -10-15 0 -30 500 2000 2250 2500 max2659 gps/gnss low-noise amplifier 4 maxim integrated nf vs. jammer power at 850mhz max2659 toc14 jammer power (dbm) nf (db) -15 -25 -20 0.5 1.0 1.5 3.02.5 2.0 3.5 0 -30 -10 -5 nf vs. jammer power at 1850mhz max2659 toc15 jammer power (dbm) nf (db) -15 -25 -20 0.5 1.0 1.5 3.02.5 2.0 3.5 0 -30 -10 downloaded from: http:///
detailed description the max2659 is an lna designed for gps l1,galileo, and glonass applications. the device fea- tures a power-shutdown control mode to eliminate the need for an external supply switch. the device achieves a 20.5db gain and an ultra-low-noise figure of 0.8db. the max2659 consumes approximately 4.1ma while providing a ip 1db of -12dbm and an iip3 of -5dbm. input and output matching the max2659 requires an off-chip input matching. onlya 6.8nh inductor in series with a dc-blocking capacitor is needed to form the input matching circuit. the typical application circuit diagram shows the recom- mended input-matching network. these values areoptimized for the best simultaneous gain, noise figure, and return loss performance. table 1 lists typical device s11 values. the max2659 integrates an on-chip output matching to 50 ? at the output, eliminating the need for external matching components. shutdown the max2659 includes a shutdown feature to turn offthe entire chip. apply a logic high to shdn pin to place the part in the active mode and a logic low to place thepart in the shutdown mode. applications information a properly designed pc board (pcb) is essential to anyrf microwave circuit. use controlled-impedance lines on all high-frequency inputs and outputs. bypass v cc with decoupling capacitors located close to the device.for long v cc lines, it may be necessary to add decou- pling capacitors. locate these additional capacitorsfurther away from the device package. proper ground- ing of the gnd pins is essential. if the pcb uses a top- side rf ground, connect it directly to the gnd pins. for a board where the ground is not on the component layer, connect the gnd pins to the board with multiple vias close to the package. chip information process: sige bicmos pin description pin name function 1, 2 gnd ground. connect to the pcb ground plane. 3 rfin rf input. requires a dc-blocking capacitor and externa l matching components. 4 v cc supply voltage. bypass to ground with a 33nf capacitor as close as po ssible to the ic. 5 shdn shutdown input. a logic-low disables the device. 6 rfout rf output. rfout is internally matched to 50 and incorporates an internal dc-blocking capacitor. max2659 gps/gnss low-noise amplifier 5 maxim integrated table 1. typical s11 values frequency (mhz) real s11 imaginary s11 1000 -0.58 -j0.52 1100 -0.68 -j0.356 1200 -0.74 -j0.16 1300 -0.74 j0.036 1400 -0.676 j0.22 1500 -0.56 j0.36 1575 -0.47 j0.415 1600 -0.44 j0.43 1700 -0.36 j0.467 1800 -0.3 j0.51 1900 -0.228 j0.567 2000 -0.14 j0.622 package type package code outline no. land pattern no. 6 ?fn l611+2 21-0147 90-0084 package information for the latest package outline information and land patterns (foot-prints), go to www.maximintegrated.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. downloaded from: http:///
maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated 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. 6 ________________________________ maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 2011 maxim integrated products, inc. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max2659 gps/gnss low-noise amplifier revision history revision number revision date description pages changed 0 4/07 initial release 1 5/08 updated digital input-logic high specification and added rfin dcvoltage specification in dc electrical characteristics table 2 2 9/09 added max2659elt/v+ to ordering information 1 3 1/11 updated maximum supply voltage specification to 3.6v 1, 2 4 8/11 updated absolute maximum ratings to reflect correct rfin voltage 2 downloaded from: http:///
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