general description the max2657/max2658 high-gain, low-noise amplifiers (lnas) are designed for gps l1, galileo, and glonass applications. designed in maxim's advanced sige pro - cess, the devices achieve a high gain and an ultra-low- noise figure while maximizing the input-referred 1db compression point and the 3rd-order intercept point. the max2657/max2658 operate from a +1.6v to +3.3v single supply. the max2657 is optimized for low current. the max2658 is optimized for high linearity. the shut - down feature in the device reduces the supply current to be less than 1a. the max2657/max2658 are available in a very small, lead-free, rohs-compliant, 0.86mm x 1.26mm x 0.65mm, wafer-level package (wlp). applications location-enabled mobile devices telematics (asset tracking and management) personal navigation devices (pnds) cellular phones with gps notebook pcs/ultra-mobile pcs recreational, marine navigation avionics watches features high-power gain: 19db (max2657) ultra-low-noise figure: 0.8db integrated 50? output matching circuit low supply current: 4.1ma (max2657) wide supply voltage range: 1.6v to 3.3v low bill of materials: one inductor, two capacitors small footprint: 0.86mm x 1.26mm thin profile: 0.65mm 0.4mm-pitch wafer-level package (wlp) 19-4956; rev 1; 4/14 +denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. ordering information part temp range pin-package max2657 ewt+t -40c to +85c 6 wlp max2658 ewt+t -40c to +85c 6 wlp b2 rfin + rfout v cc shdn rfoutput gnd rf input l1 = 6.2nh (max2657)c1 = 820pf (max2657) c2 = 33nf l1 = 2.7nh (max2658)c1 = 1500pf (max2658) l1 c1 c2 v cc max2657max2658 b1 a2 bias a1 c2 gnd c1 max2657/max2658 gps/gnss low-noise amplifiers pin coniguration/typical application circuit evaluation kit available downloaded from: http:///
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) 6-bump wlp (derates 10.5mw/c above +70c) ...... 840mw maximum current into rf input ......................................... 10ma operating temperature range ........................... -40c to +85c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +160c lead temperature (soldering, 10s) ......... reflow profile (note 1) (max2657/max2658 ev kit. v cc = 1.6v to 3.3v, t a = -40c to +85c, f rfin = 1575.42mhz. typical values are at v cc = 2.85v and t a = +25c, unless otherwise noted.) (note 2) (max2657/max2658 ev kit. v cc = 1.6v to 3.3v, t a = -40c to +85c, no rf signals are applied. typical values are at v cc = 2.85v and t a = +25c, unless otherwise noted.) (note 2) parameter conditions min typ max units supply voltage 1.6 2.85 3.3 v supply current shdn = high max2657 4.1 ma max2658 7.7 shutdown mode, shdn = low 1 a digital input logic-high 1.2 v digital input logic-low 0.45 v digital input current 1 a parameter conditions min typ max units rf frequency l1 band 1575.42 mhz power gain v cc = 2.85v max2657 19.5 db max2658 17.7 v cc = 1.6v max2657 19.4 max2658 17.6 noise figure v cc = 1.8v 0.8 db v cc = 3.3v 0.8 in-band 3rd-order input interceptpoint (note 3) max2657 -3.5 dbm max2658 +4.5 out-of-band 3rd-order inputintercept point (note 4) max2657 +2.5 dbm max2658 +8 max2657/max2658 gps/gnss low-noise ampliiers www.maximintegrated.com maxim integrated 2 ac electrical characteristics dc electrical characteristics 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. caution! esd sensitive device note 1: refer to application note 1891: wafer-level packaging (wlp) and its applications. absolute maximum ratings downloaded from: http:///
(max2657/max2658 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) note 2: min and max limits guaranteed by test at t a = +85c and guaranteed by design and characterization at t a = -40c and t a = +25c. note 3: measured with the two tones located at 1mhz and 2mhz offset from the center of the gps band with -30dbm/tone for max2657 and -27dbm/tone for max2658. note 4: measured with input tones at 1713mhz (-25dbm) and 1851mhz (-49dbm). note 5: measured with a tone located at 5mhz offset from the center of the gps band. (max2657/max2658 ev kit. v cc = 1.6v to 3.3v, t a = -40c to +85c, f rfin = 1575.42mhz. typical values are at v cc = 2.85v and t a = +25c, unless otherwise noted.) (note 2) parameter conditions min typ max units input 1db compression point (note 5) max2657 -12.5 dbm max2658 -10 input return loss 10 db output return loss 15 db reverse isolation 30 db reverse isolation vs. frequency max2657 toc03 frequency (mhz) |s12| (db) 2000 1500 1000 -60 -50 -40 -30 -20-70 500 2500 max2658 max2657 gain vs. frequency max2657 toc02 frequency (mhz) gain (db) 2000 1500 1000 -5 0 5 10 15 20 25 -10 500 2500 max2658 max2657 input return loss vs. frequency max2657 toc01 frequency (mhz) |s11| (db) 2000 1500 1000 -30 -25 -20 -15 -10 -5 0 -35 500 2500 max2658 max2657 max2657/max2658 gps/gnss low-noise ampliiers www.maximintegrated.com maxim integrated 3 typical operating characteristics ac electrical characteristics (continued) downloaded from: http:///
(max2657/max2658 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) iip3 (dbm) supply voltage (v) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 3.2 max2658 out-of-band iip3 vs. supply voltage and temperature (tone 1 at 1713mhz, -25dbm; tone 2 at 1851mhz, -49dbm) max2657 toc08 5 6 7 8 9 10 4 -40?c +85?c +25?c max2657 out-of-band iip3 vs. supply voltage and temperature (tone 1 at 1713mhz, -25dbm; tone 2 at 1851mhz, -49dbm) max2657 toc07 supply voltage (v) iip3 (dbm) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 0 1 2 3 -1 1.6 -40?c +85?c +25?c 3.2 max2658 in-band iip3 vs. supply voltage and temperature (two tones located at 1mhz and 2mhz offset with -30dbm/tone) max2657 toc06 supply voltage (v) iip3 (dbm) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 2 4 6 80 1.6 -40?c +85?c +25?c 3.2 max2657 in-band iip3 vs. supply voltage and temperature (two tones located at 1mhz and 2mhz offset with -35dbm/tone) max2657 toc05 supply voltage (v) iip3 (dbm) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -4 -3 -2 -1 0 -5 1.6 3.2 -40?c +85?c +25?c output return loss vs. frequency max2657 toc04 frequency (mhz) |s22| (db) 2000 1500 1000 -20 -15 -10 -5 0 -25 500 2500 max2658 max2657 max2657/max2658 gps/gnss low-noise ampliiers maxim integrated 4 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(max2657/max2658 ev kit. typical values are at v cc = 2.85v, t a = +25c, and f rfin = 1575.42mhz, unless otherwise noted.) max2658 input p1db compression vs. supply voltage and temperature max2657 toc10 supply voltage (v) input p1db (dbm) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 -13 -12 -11 -10 -9 -14 1.6 3.2 -40?c +85?c +25?c supply voltage (v) 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 3.2 max2657 toc09 max2657 input p1db compression vs. supply voltage and temperature input p1db (dbm) -17 -16 -15 -14 -13 -12 -11-18 -40?c +85?c +25?c max2657/max2658 gps/gnss low-noise ampliiers maxim integrated 5 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
detailed description the max2657/max2658 are lnas designed for gps l1, galileo, and glonass applications. the devices feature a power-shutdown control mode to eliminate the need for an external supply switch. the devices achieve a high gain and an ultra-low-noise figure. input and output matching the max2657/max2658 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 simultane - ous gain, noise figure, and return loss performance. tables 1 and 2 list typical device s parameters and k f values. the max2657/max2658 integrate an on-chip output matching to 50 ? at the output, eliminating the need for external matching components. the value of the input coupling capacitor affects iip3. a smaller coupling capacitor results in lower iip3. shutdown the max2657/max2658 include a shutdown feature to turn off the entire chip. apply a logic-high to the shdn pin to place the part in the active mode, and a logic-low to place the part in the shutdown mode. applications information a properly designed pcb is essential to any rf microwave circuit. use controlled-impedance lines on all high-fre - quency 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 pins is essential. if the pcb uses a topside 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. table 1. max2657 typical s-parameter values and k-factor pin description 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 -2.0 -47.7 6.0 -100.0 -47.5 -148.0 -1.0 -55.0 5.1 1100 -2.1 -48.6 7.4 -100.6 -45.7 -150.0 -1.0 -58.1 3.8 1200 -2.2 -51.6 9.6 -107.3 -42.9 -153.5 -1.4 -65.4 3.1 1300 -2.4 -55.0 12.0 -117.2 -39.6 -160.2 -2.1 -74.1 2.5 1400 -2.7 -58.6 14.0 -129.5 -37.0 -168.5 -3.6 -85.5 2.3 1500 -6.5 -61.9 16.2 -146.5 -34.1 178.5 -7.4 -100.0 2.8 1575 -4.3 -62.3 17.1 -164.2 -32.9 162.8 -15.3 -100.8 2.1 1600 -4.6 -61.6 17.3 -170.6 -32.8 156.6 -20.6 -78.9 2.0 1700 -5.4 -55.3 17.1 165.5 -32.5 136.5 -9.5 10.0 1.8 1800 -5.2 -49.8 15.7 145.8 -33.8 121.6 -4.5 -2.4 1.6 1900 -4.8 -47.3 13.9 135.2 -35.2 113.8 -2.7 -13.2 1.6 2000 -4.5 -46.7 12.7 127.3 -36.7 109.6 -1.8 -21.2 1.5 bump name function a1 shdn shutdown input. a logic-low disables the device. a2 rfout rf output. rfout is internally matched to 50? and incorporates an internal dc-blocking capacitor. b1 rfin rf input. requires a dc-blocking capacitor and external matching components. b2 v cc supply voltage. bypass to ground with a 33nf capacitor as close as possible to the ic. c1, c2 gnd ground. connect to the pcb ground plane. max2657/max2658 gps/gnss low-noise ampliiers www.maximintegrated.com maxim integrated 6 downloaded from: http:///
table 4. max2658 typical noise parameters (v cc = 2.85v, t a = +25 c) table 3. max2657 typical noise parameters (v cc = 2.85v, t a = +25 c) table 2. max2658 typical s-parameter values and k-factor frequency (mhz) fmin (db) | g opt | | g opt | angle r n ( ? ) 1550 0.68 0.28 88.0 4.48 1560 0.68 0.28 88.4 4.48 1570 0.68 0.28 88.8 4.48 1575 0.68 0.28 89.0 4.48 1580 0.68 0.28 89.2 4.48 1590 0.69 0.28 89.6 4.47 1600 0.69 0.28 90.0 4.47 frequency (mhz) fmin (db) | g opt | | g opt | angle r n ( ? ) 1550 0.68 0.44 47.7 8.39 1560 0.68 0.44 48.1 8.38 1570 0.68 0.44 48.3 8.37 1575 0.68 0.44 48.5 8.36 1580 0.68 0.44 48.6 8.36 1590 0.68 0.44 48.9 8.35 1600 0.68 0.44 49.2 8.34 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 -3.0 -57.0 10.8 -120.0 -43.0 -154.0 -1.3 -65.0 3.2 1100 -3.3 -58.2 11.6 -124.5 -42.1 -155.0 -1.6 -70.2 3.3 1200 -3.5 -60.0 13.4 -134.6 -39.3 -160.5 -2.4 -79.6 2.8 1300 -3.8 -62.3 14.9 -148.0 -37.2 -168.3 -4.0 -90.0 2.7 1400 -4.3 -63.3 15.9 -162.3 -35.4 -178.2 -7.3 -101.0 2.7 1500 -4.9 -62.0 16.6 -178.9 -33.9 171.0 -14.5 -100.6 2.6 1575 -5.3 -59.7 16.6 168.0 -33.5 161.7 -19.6 -26.0 2.5 1600 -5.4 -58.5 16.5 163.9 -33.6 157.5 -16.7 -6.0 2.5 1700 -5.5 -53.7 15.8 149.3 -33.6 148.3 -9.0 3.6 2.3 1800 -5.3 -50.3 14.7 136.8 -34.2 142.5 -5.7 -2.8 2.2 1900 -5.1 -48.0 13.4 130.0 -35.1 139.6 -4.0 -9.6 2.3 2000 -4.9 -46.3 12.7 123.9 -35.8 138.6 -3.0 -15.0 2.1 max2657/max2658 gps/gnss low-noise ampliiers www.maximintegrated.com maxim integrated 7 downloaded from: http:///
package type package code outline no. land pattern no. 6 wlp w61b1+1 21-0217 90-0226 max2657/max2658 gps/gnss low-noise ampliiers www.maximintegrated.com maxim integrated 8 package information for the latest package outline information and land patterns (footprints), 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. chip information process: sige bicmos downloaded from: http:///
revision number revision date description pages changed 0 9/09 initial release 1 4/14 updated applications 1 revision history 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 speciications without n otice 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 and the maxim integrated logo are trademarks of maxim integrated products, inc. max2657/max2658 gps/gnss low-noise ampliiers ? 2014 maxim integrated products, inc. 9 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///
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