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gps/gnss low-noise amplifiers max2687/max2689/max2694 evaluation kit available 19-6040; rev 2; 10/13 typical application circuit general description the max2687/max2689/max2694 low-noise amplifiers (lnas) are designed for gps l1, galileo, and glonass applications. designed in maxim?s advanced sige pro - cess, the devices achieve high gain and low noise figure while maximizing the input-referred 1db compression point and the 3rd-order intercept point. the max2687/ max2689/max2694 provide high gains of 12db, 15db, and 18db, respectively. each is optimized for high linearity. the devices operate from a +1.6v to +3.6v single sup - ply. the optional shutdown feature in the devices reduc - es the supply current to less than 10 f a. the devices are available in a very small, lead-free, rohs-compliant, 0.86mm x 0.86mm x 0.65mm wafer-level package (wlp). applications telematics (asset tracking and management)personal navigation devices (pnds) cellular phones with gps notebook pcs/ultra-mobile pcs recreational, marine navigation avionics watches digital cameras features s high power gain: 17.8db (max2687) s low noise figure: 0.85db (max2687) s integrated 50 output matching circuit s low supply current: 4.5ma (max2694) s wide supply voltage range: 1.6v to 3.6v s low bill of materials: one inductor, two capacitors s small footprint: 0.86mm x 0.86mm s 0.4mm-pitch wafer-level package (wlp) ordering information appears at end of data sheet. max2687max2689 max2694 a1 a2 b1 b2 optional shutdown gnd shdn r125k i rfoutput rfout v cc v cc c2 rf input c1 l1 rfin max2687max2694 l1 = 4.7nhc1 = 100nf c2 = 10pf l1 = 5.8nhc1 = 100nf c2 = 10pf max2689 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim?s website at www.maximintegrated.com. downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 2 maxim integrated v cc to gnd .......................................................... -0.3v to +3.6v other pins to gnd ............... -0.3v to (+ operating v cc + 0.3v) maximum rf input power ............................................... +5dbm continuous power dissipation (t a = +70c) 4-bump wlp (derates 9.7mw/c above +70c) ........ 776mw maximum current into rf input ......................................... 10ma operating temperature range .......................... -40c to +85c junction temperature ..................................................... +150c storage temperature range ............................ -65c to +160c soldering temperature (reflow) (note 1) ........................ +260c dc electrical characteristics (max2687/max2689/max2694 ev kit, v cc = 1.6v to 3.6v, t a = -40 n c to +85 n c, no rf signals are applied. typical values are at v cc = 2.85v and t a = +25 n c, unless otherwise noted.) (note 3) ac electrical characteristics (max2687/max2689/max2694 ev kit, v cc = 1.6v to 3.6v, t a = -40 n c to +85 n c, f rfin = 1575.42mhz. typical values are at v cc = 2.85v and t a = +25 n c, unless otherwise noted.) (note 3) absolute maximum ratingsnote 1: refer to application note 1891: wafer-level packaging (wlp) and its applications . wlp junction-to-ambient thermal resistance ( q ja ) ........ 103c/w note 2: 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.maximintegrated.com/thermal-tutorial . package thermal characteristics (note 2) caution! esd sensitive device stresses beyond those listed under ?absolute 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. parameter conditions min typ max units supply voltage 1.6 2.85 3.6 v supply current shdn = high max2687 7.6 ma max2689 7.6 max2694 4.5 shutdown mode, v shdn = 0v 20 a digital input logic-high (note 4) 1.2 v digital input logic-low (note 4) 0.45 v parameter conditions min typ max units rf frequency l1 band 1575.42 mhz power gain v cc = 2.85v (note 5) max2687 14.7 17.8 db max2689 12.1 15.1 max2694 8.9 11.6 v cc = 1.6v max2687 14.0 17.7 max2689 11.8 15 max2694 8.7 11.5 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 3 maxim integrated ac electrical characteristics (continued) (max2687/max2689/max2694 ev kit, v cc = 1.6v to 3.6v, t a = -40 n c to +85 n c, f rfin = 1575.42mhz. typical values are at v cc = 2.85v and t a = +25 n c, unless otherwise noted.) (note 3) note 3: min and max limits guaranteed by test at t a = +25c and guaranteed by design and characterization at t a = -40c and t a = +85c, unless otherwise noted. note 4: min and max limits guaranteed by test at t a = +25c. note 5: min limit guaranteed by design and characterization. note 6: measured with the two tones located at 1mhz and 2mhz offset from the center of the gps band with -27dbm/tone for the max2687, -30dbm/tone for the max2689, and -24dbm/tone for the max2694. note 7: measured with input tones at 1713mhz (-27dbm) and 1851mhz (-39dbm). note 8: measured with a tone located at the center of the gps band. parameter conditions min typ max units noise figure v cc = 1.6v to 3.3v max2687 0.85 db max2689 1.2 max2694 0.97 in-band 3rd-order input intercept point (note 6) max2687 5.5 dbm max2689 5.1 max2694 6.85 out-of-band 3rd-order input intercept point (note 7) max2687 9.146 dbm max2689 8 max2694 8.644 input 1db compression point (note 8) max2687 -9.3 dbm max2689 -8.9 max2694 -2.25 input return loss max2687 7.8 db max2689 9 max2694 16.8 output return loss max2687 20.7 db max2689 15.2 max2694 11.6 reverse isolation max2687 43.9 db max2689 43.3 max2694 21.5 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 4 maxim integrated typical operating characteristics (max2687/max2689/max2694 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) max2687 input p1db vs. supply volatage and temperature max2687 toc07 supply voltage (v) input p1db (dbm) 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -14 -13 -12 -11 -10-15 1.6 3.6 t a = +85c t a = -40c t a = +25c 1db gain desense vs. blocker frequency max2687 toc08 blocker frequency (mhz) |blocker power| (dbm) 2000 1500 1000 -25 -20 -15 -10 -5 0 -30 500 2500 output return loss vs. frequency max2687 toc04 frequency (mhz) | s22 | (db) 2000 1500 1000 -20 -50 -10 -5 0 5 -25 500 2500 in-band iip3 vs. supply volatage and temperature max2687 toc05 supply voltage (v) iip3 (dbm) 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 2 4 6 8 10 0 1.6 3.6 t a = +85c t a = -40c t a = +25c out-of-band iip3 vs. supply voltage and temperature max2687 toc06 supply voltage (v) iip3 (dbm) 6 8 10 12 14 16 4 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 3.6 -40c +25c +85c ftone 1 = 1713mhzptone 1 = -27dbm ftone 2 = 1851mhz ptone 2 = -39dbm input return loss vs. frequency max2687 toc01 frequency (mhz) | s11 | (db) 2000 1500 1000 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 -20 500 2500 gain vs. frequency max2687 toc02 frequency (mhz) gain (db) 2000 1500 1000 2 4 6 8 10 12 14 16 18 20 0 500 2500 reverse isolation vs. frequency max2687 toc03 frequency (mhz) | s12 | (db) 2000 1500 1000 -70 -60 -50 -40 -30 -20-80 500 2500 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 5 maxim integrated max2694 typical operating characteristics (continued)(max2687/max2689/max2694 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) input return loss vs. frequency max2687 toc09 frequency (mhz) |s11| (db) 2000 1500 1000 -25 -20 -15 -10 -5 0 -30 500 2500 gain vs. frequency max2687 toc10 frequency (mhz) gain (db) 2000 1500 1000 1412 10 86 4 2 0 -2 500 2500 reverse isolation vs. frequency max2687 toc11 frequency (mhz) | s12 | (db) 2000 1500 1000 -45 -40 -35 -30 -25 -20 -15 -10-50 500 2500 output return loss vs. frequency max2687 toc12 frequency (mhz) |s22| (db) 2000 1500 1000 -10 -5 0 5 -15 500 2500 in-band iip3 vs. supply voltage and temperature max2687 toc13 supply voltage (v) iip3 (dbm) 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 6 7 8 9 10 5 1.6 3.6 -40c +85c +25c out-of-band iip3 vs. supply voltage and temperature max2687 toc14 supply voltage (v) iip3 (dbm) 6 8 10 12 14 16 4 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 3.6 +25c +85c ftone 1 = 1713mhzptone 1 = -27dbm ftone 2 = 1851mhz ptone 2 = -39dbm -40c input p1db vs. supply voltage and temperature max2687 toc15 supply voltage (v) input p1db (dbm) 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -8 -6 -4 -2 0 -10 1.6 3.6 -40c +85c +25c 1db gain desense vs. blocker frequency max2687 toc16 blocker frequency (mhz) |blocker power| (dbm) 2000 1500 1000 -25 -20 -15 -10 -5 0 -30 500 2500 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 6 maxim integrated typical operating characteristics (continued)(max2687/max2689/max2694 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) max2689 input return loss vs. frequency max2687 toc17 frequency (mhz) | s11 | (db) 2000 1500 1000 -20 -10 0 -30 500 2500 gain vs. frequency max2687 toc18 frequency (mhz) gain (db) 2000 1500 1000 0 5 10 15 20 -5 500 2500 reverse isolation vs. frequency max2687 toc19 frequency (mhz) | s12 | (db) 2000 1500 1000 -60 -50 -40 -30-70 500 2500 output return loss vs. frequency max2687 toc20 frequency (mhz) | s22 | (db) 2000 1500 1000 -15 -10 -5 0 -20 500 2500 in-band iip3 vs. supply voltage and temperature (two tones located at 1mhz and 2mhz offset with -30db m/ tone) max2687 toc21 supply voltage (v) iip3 (dbm) 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 3 4 5 62 1.6 t a = +25c t a = +85c t a = -40c out-of-band iip3 vs. supply voltage and temperature (tone 1 at 1713mhz, -27dbm; tone 2 at 1851mhz, -39dbm) max2687 toc22 supply voltage (v) iip3 (dbm) 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 6 8 10 12 4 1.6 t a = -40c t a = +25c t a = +85c input p1db compression vs. supply voltage and temperature max2687 toc23 supply voltage (v) input p1db (dbm) 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -11 -10 -9 -8 -12 1.6 t a = +25c t a = +85c t a = -40c 1db gain desense vs. blocker frequency max2687 toc24 blocker frequency (mhz) blocker power (dbm) -20 -10-15 -5 0 -25 2000 1500 1000 500 2500 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 7 maxim integrated bump description bump configuration detailed description the max2687/max2689/max2694 are lnas designed for gps l1, galileo, and glonass applications. the devices feature an optional power-shutdown control mode to eliminate the need for an external supply switch. the devices achieve high gain, low noise figure, and excellent linearity. input and output matching the devices require an off-chip input matching. only an inductor in series with a dc-blocking capacitor is needed to form the input matching circuit. the typical application circuit shows the recommended input- matching network. these values are optimized for the best simultaneous gain, noise figure, and return loss performance. the value of the input coupling capacitor affects iip3. a smaller coupling capacitor results in lower iip3. the devices integrate an on-chip output matching to 50 i at the output, eliminating the need for external matching components. tables 1 and 2 list typical device s parameters and k f values. typical noise parameters are shown in tables 3 and 4. shutdown the devices include an optional shutdown feature to turn off the entire chip. the devices are placed in active mode by default once v cc is applied, due to the on-chip pullup resistor to v cc at the rfout bump (shared with the shdn input). to shut down the part, apply a logic- low to the rfout bump through an external resistor with an adequate value, e.g., 25k i , in order not to load the rf output signal during active operation. wlp top view max2687max2689 max2694 rfin v cc gnd rfout (shdn) a1 a2 b1 b2 + bump name function a1 v cc supply voltage. bypass to ground with a 10pf capacitor as close as possible to the ic. a2 rfout ( shdn ) rf output/ shdn input. rfout is internally matched to 50 i and pulled up to v cc through a 1m i resistor. shdn is shared with the rfout bump. the devices are in active mode by default once v cc is applied. rfout( shdn ) can be pulled to a dc low through a 25k i resistor to shut down the ic. b1 rfin rf input. requires a dc-blocking capacitor and external matching components. b2 gnd ground. connect to the pcb ground plane. downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 8 maxim integrated table 1. max2687 typical s parameter values and k-factor table 2. max2689 typical s parameter values and k-factor freq (mhz) s11 mag (db) s11 phase (degrees) s21 mag (db) s21 phase (degrees) s12 mag (db) s12 phase (degrees) s22 mag (db) s22 phase (degrees) k f 1000 -3.9 -91.5 10.1 164.7 -48.4 96.6 -2.2 -154.8 10.0 1100 -4.1 -97.6 11.7 152.8 -51.2 47.8 -2.9 -175.2 14.0 1200 -4.4 -103.6 13.3 136.5 -47.3 42.2 -3.9 164.0 9.6 1300 -4.3 -109.6 14.6 118.8 -53.1 80.2 -5.4 140.3 19.1 1400 -4.0 -116.9 15.6 102.3 -55.0 152.6 -7.5 112.1 23.4 1500 -3.9 -127.1 17.0 82.1 -45.7 119.1 -11.7 70.7 7.6 1575 -4.5 -133.3 17.3 63.7 -44.5 72.7 -18.1 15.0 7.3 1600 -4.7 -133.6 17.1 56.9 -46.9 36.4 -20.9 -18.1 10.1 1700 -4.2 -140.0 17.1 39.7 -48.8 77.8 -14.7 -100.3 11.4 1800 -4.2 -150.0 17.0 18.6 -41.6 76.6 -8.8 -137.7 4.3 1900 -4.5 -159.2 16.6 -1.5 -39.2 39.1 -5.6 -168.2 2.9 2000 -4.8 -166.3 15.5 -20.2 -37.6 17.5 -4.0 163.7 2.3 freq (mhz) s11 mag (db) s11 phase (degrees) s21 mag (db) s21 phase (degrees) s12 mag (db) s12 phase (degrees) s22 mag (db) s22 phase (degrees) kf 1000 -3.8 -93.0 6.0 150.9 -52.1 80.8 -1.9 -161.7 21.6 1100 -3.8 -100.5 7.7 140.7 -62.5 44.2 -2.4 -178.8 68.3 1200 -4.0 -107.8 9.3 124.7 -53.9 19.6 -3.2 164.4 26.5 1300 -3.9 -115.5 10.8 107.7 -56.2 55.3 -4.3 145.5 34.8 1400 -3.8 -124.9 12.1 89.7 -49.8 124.0 -6.5 124.1 17.5 1500 -4.2 -133.5 13.1 65.2 -43.4 53.2 -11.5 113.3 9.6 1575 -4.2 -136.3 12.9 50.7 -47.2 12.5 -14.7 120.9 15.6 1600 -4.1 -138.4 12.9 45.3 -48.3 12.9 -16.5 126.1 17.6 1700 -3.9 -146.3 13.1 25.9 -51.5 74.0 -16.0 -177.6 24.1 1800 -3.8 -155.2 12.7 5.3 -46.7 71.0 -9.8 -174.3 12.9 1900 -3.9 -163.6 12.2 -13.7 -42.9 43.0 -6.4 171.4 7.6 2000 -4.0 -170.6 11.2 -29.8 -41.6 27.0 -4.5 154.6 6.1 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 9 maxim integrated table 4. max2687 typical noise parameters (v cc = 2.85v, t a = +25 n c) table 3. max2694 typical s parameter values and k-factor table 5. max2689 typical noise parameters (v cc = 2.85v, t a = +25 n c) freq (mhz) s11 mag (db) s11 phase (degrees) s21 mag (db) s21 phase (degrees) s12 mag (db) s12 phase (degrees) s22 mag (db) s22 phase (degrees) k f 1000 -2.7 -106.3 5.8 145.8 -33.4 103.0 -2.2 -160.9 2.7 1100 -3.0 -117.0 7.1 133.6 -31.1 95.5 -2.8 -179.0 2.4 1200 -3.4 -127.6 8.5 117.1 -29.0 81.3 -3.8 163.5 2.1 1300 -4.0 -138.6 9.7 98.3 -26.8 67.7 -5.3 145.9 1.9 1400 -4.9 -149.8 10.3 79.8 -24.9 55.3 -7.6 130.7 1.8 1500 -6.2 -158.2 10.8 59.9 -22.9 36.8 -10.8 126.6 1.6 1575 -7.0 -159.5 10.7 46.2 -22.4 21.7 -12.3 132.7 1.6 1600 -7.2 -160.0 10.6 41.3 -22.5 17.5 -12.7 134.9 1.6 1700 -7.7 -163.0 10.6 23.5 -22.0 4.0 -12.9 150.7 1.5 1800 -8.2 -164.6 10.2 6.2 -21.3 -11.5 -10.3 158.0 1.4 1900 -8.1 -165.5 9.9 -11.7 -21.2 -26.8 -7.7 150.4 1.3 2000 -7.7 -167.3 9.0 -27.0 -20.9 -42.3 -5.9 137.5 1.2 frequency (mhz) fmin (db) | g opt | | g opt | angle r n ( i ) 1550 0.69 0.26 66 5.28 1560 0.69 0.26 66 5.27 1570 0.69 0.26 67 5.27 1575 0.69 0.25 67 5.26 1580 0.69 0.25 67 5.26 1590 0.70 0.25 68 5.26 1600 0.70 0.25 68 5.25 frequency (mhz) fmin (db) | g opt | | g opt | angle r n ( i ) 1550 0.80 0.27 73 5.89 1560 0.80 0.27 74 5.87 1570 0.81 0.27 74 5.86 1580 0.81 0.27 75 5.85 1590 0.81 0.27 75 5.84 1600 0.81 0.27 76 5.83 downloaded from: http:///
gps/gnss low-noise amplifiers max2687/max2689/max2694 10 maxim integrated applications information a properly designed pcb is essential to any rf micro - wave 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 decoupling capacitors. locate these additional capacitors further away from the device package. proper grounding of the gnd bump is essential. if the pcb uses a topside rf ground, connect it directly to the gnd bump. for a board where the ground is not on the component layer, connect the gnd bump to the board with multiple vias close to the package. refer to www.maximintegrated.com/datasheet/index. mvp/id/6932/t/do for the max2687/max2689/max2694 ev kit schematic, gerber data, pads layout file, and bom information. chip information process: sige bicmos table 6. max2694 typical noise parameters (v cc = 2.85v, t a = +25 n c) + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. ordering information 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. frequency (mhz) fmin (db) | g opt | | g opt | angle r n ( i ) 1550 0.75 0.44 48 9.06 1560 0.75 0.44 48 9.04 1570 0.75 0.44 48 9.02 1575 0.75 0.43 49 9.01 1580 0.75 0.43 49 9.00 1590 0.75 0.43 49 8.98 1600 0.75 0.43 49 8.96 package type package code outline no. land pattern no. 4 wlp w40a0+1 21-0480 refer to application note 1891 part temp range pin-package max2687 ews+t -40 n c to +85 n c 4 wlp max2689 ews+t -40 n c to +85 n c 4 wlp max2694 ews+t -40 n c to +85 n c 4 wlp 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. maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 11 ? 2013 maxim integrated products, inc. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. gps/gnss low-noise amplifiers max2687/max2689/max2694 revision history revision number revision date description pages changed 0 9/11 initial release ? 1 5/12 added max2689 to data sheet all 2 10/13 revised ac electrical characteristics table 2 downloaded from: http:///

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