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50 mhz to 6 ghz rf/if gain block adl5541 rev. 0 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2007 analog devices, inc. all rights reserved. features fixed gain of 15 db operation up to 6 ghz input/output internally matched to 50 integrated bias control circuit output ip3 44 dbm at 500 mhz 40 dbm at 900 mhz output 1 db compression: 1 9.7 dbm at 900 mhz noise figure of 3.5 db at 900 mhz single 5 v power supply small footprint 8-lead lfcsp pin compatible with 20 db gain adl5542 1 kv esd (class 1c) functional block diagram 2 gnd 7 gnd 1 rfin 8 rfout 3 gnd 6 gnd 4 cb 5 vpos input match output match bias control adl5541 06877-001 figure 1. general description the adl5541 is a broadband 15 db linear amplifier that operates at frequencies up to 6 ghz. the device can be used in a wide variety of catv, cellular, and instrumentation equipment. the adl5541 provides a gain of 15 db, which is stable over frequency, temperature, power supply, and from device to device. the device is internally matched to 50 with an input return loss of 10 db or better up to 6 ghz. only input/output ac coupling capacitors, power supply decoupling capacitors, and an external inductor are required for operation. the adl5541 is fabricated on an ingap hbt process and has an esd rating of 1 kv (class 1c). the device is packaged in a 3 mm 3 mm lfcsp that uses an exposed paddle for excellent thermal impedance. the adl5541 consumes 90 ma on a single 5 v supply and is fully specified for operation from ?40c to +85c. a fully populated rohs-compliant evaluation board is available. the adl5542 is a companion part that offers a gain of 20 db in a pin-compatible package.
adl5541 rev. 0 | page 2 of 12 table of contents features .............................................................................................. 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 typical scattering parameters ..................................................... 5 absolute maximum ratings ............................................................ 6 esd caution .................................................................................. 6 pin configuration and function descriptions ............................. 7 typical performance characteristics ..............................................8 basic connections .......................................................................... 10 soldering information and recommended pcb land pattern ....................................................................................................... 10 evaluation board ............................................................................ 11 outline dimensions ....................................................................... 12 ordering guide .......................................................................... 12 revision history 7/07revision 0: initial version
adl5541 rev. 0 | page 3 of 12 specifications vpos = 5 v and t a = 25c, unless otherwise noted. table 1. parameter conditions min typ max unit overall function frequency range 50 6000 mhz gain (s21) 900 mhz 15.2 db input return loss (s11) frequency 500 mhz to 5 ghz ?12 db output return loss (s22) frequency 500 mhz to 5 ghz ?10 db reverse isolation (s12) ?19 db frequency = 100 mhz gain 15.7 db output 1 db compression point 19 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 38 dbm noise figure 3.5 db frequency = 500 mhz gain 14.7 15.1 15.5 db vs. frequency 50 mhz 0.15 db vs. temperature ?40c t a +85c 0.1 db vs. supply 4.75 v to 5.25 v 0.01 db output 1 db compression point 19.9 dbm output third-order intercept f = 1 mhz, output power (p out ) = 3 dbm per tone 44 dbm noise figure 3.5 3.7 db frequency = 900 mhz gain 14.9 15.2 15.4 db vs. frequency 50 mhz 0.03 db vs. temperature ?40c t a +85c 0.15 db vs. supply 4.75 v to 5.25 v 0.01 db output 1 db compression point 19.7 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 40.8 dbm noise figure 3.5 3.7 db frequency = 2000 mhz gain 13.9 14.7 15.4 db vs. frequency 50 mhz 0.03 db vs. temperature ?40c t a +85c 0.17 db vs. supply 4.75 v to 5.25 v 0.01 db output 1 db compression point 16.3 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 39.2 dbm noise figure 3.8 4.0 db frequency = 2400 mhz gain 13.9 14.5 15.1 db vs. frequency 50 mhz 0.03 db vs. temperature ?40c t a +85c 0.19 db vs. supply 4.75 v to 5.25 v 0.02 db output 1 db compression point 14.9 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 38.6 dbm noise figure 4.0 4.2 db
adl5541 rev. 0 | page 4 of 12 parameter conditions min typ max unit frequency = 3500 mhz gain 13.6 14.3 14.9 db vs. frequency 50 mhz 0.03 db vs. temperature ?40c t a +85c 0.19 db vs. supply 4.75 v to 5.25 v 0.02 db output 1 db compression point 12.1 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 30.7 dbm noise figure 4.2 4.5 db frequency = 5800 mhz gain 9.1 11.2 13.5 db vs. frequency 50 mhz 0.15 db vs. temperature ?40c t a +85c 0.9 db vs. supply 4.75 v to 5.25 v 0.02 db output 1 db compression point 5.8 dbm output third-order intercept f = 1 mhz, output power (p out ) = 0 dbm per tone 21.9 dbm noise figure 6.0 7.0 db power interface pin vpos supply voltage (vpos) 4.5 5 5.5 v supply current 90 100 ma vs. temperature ?40c t a +85c 12 ma power dissipation vpos = 5 v 0.5 w
adl5541 rev. 0 | page 5 of 12 typical scattering parameters vpos = 5 v and t a = 25c, the effects of the test fixture have been de-embedded up to the pins of the device. table 2. s11 s21 s12 s22 freq. (mhz) magnitude (db) angle () magnitude (db) angle () magnitude (db) angle () magnitude (db) angle () 50 ?18.11 ?134.53 16.29 +166.36 ?19.15 +3.84 ?17.89 ?134.08 100 ?20.84 ?161.29 15.93 +168.53 ?18.82 +2.26 ?22.24 ?155.22 500 ?27.69 +115.36 15.58 +154.53 ?18.70 ?13.59 ?24.96 +176.64 900 ?27.48 +101.79 15.52 +136.22 ?18.70 ?26.33 ?22.38 +173.92 1000 ?26.87 +91.91 15.56 +131.64 ?18.64 ?29.43 ?23.15 +174.28 1500 ?29.18 ?107.74 15.50 +108.03 ?18.64 ?44.69 ?19.35 +167.80 2000 ?17.88 ?153.68 15.51 +84.72 ?18.43 ?60.42 ?14.13 +176.19 2500 ?9.87 +169.30 15.57 +59.74 ?18.32 ?75.48 ?9.89 +161.55 3000 ?7.92 +142.75 15.49 +35.05 ?17.93 ?92.29 ?8.69 +138.18 3500 ?7.74 +117.57 15.21 +9.15 ?18.14 ?110.62 ?11.02 +100.39 4000 ?10.85 +116.84 14.82 ?16.13 ?18.11 ?125.08 ?15.70 +6.37 4500 ?13.25 +136.93 15.23 ?41.75 ?17.54 ?142.99 ?7.83 ?80.59 5000 ?13.97 +143.02 14.56 ?68.15 ?17.64 ?161.24 ?6.87 ?112.39 5500 ?13.68 ?121.08 13.89 ?96.10 ?17.47 +178.77 ?11.66 ?102.32 6000 ?4.52 ?138.62 12.07 ?123.56 ?18.61 +157.35 ?7.66 ?54.40
adl5541 rev. 0 | page 6 of 12 absolute maximum ratings table 3. parameter rating supply voltage, vpos 6.5 v input power (re: 50 ) 10 dbm internal power dissipation (paddle soldered) 650 mw jc (junction to paddle) 28.5c/w maximum junction temperature 150c operating temperature range ?40c to +85c storage temperature range ?65c to +150c stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. esd caution
adl5541 rev. 0 | page 7 of 12 pin configuration and fu nction descriptions pin 1 indicator 1 rfin 2 gnd 3 gnd 4 cb 7gnd 8rfout 6gnd 5 vpos adl5541 top view (not to scale) 06877-002 figure 2. pin configuration table 4. pin function descriptions pin no. mnemonic description 1 rfin rf input. requires a dc blocking capacitor. 2, 3, 6, 7 gnd ground. connect these pins to a low impedance ground plane. 4 cb low frequency bypass. a 1 f capacitor should be connected between this pin and ground. 5 vpos power supply for bias controller. connect directly to external power supply. 8 rfout rf output and supply voltage. dc bias is provided to this pin through an inductor that is tied to the external power supply. rf path requires a dc blocking capacitor. exposed paddle exposed paddle. inte rnally connected to gnd. solder to a low impedance ground plane.
adl5541 rev. 0 | page 8 of 12 typical performance characteristics 45 0 frequency (ghz) gain, p1db, oip3, nf (db, dbm) 40 35 30 25 20 15 10 5 5.75.34.94.54.13.73.3 2.92.5 2.11.71.30.90.5 oip3 (0dbm) p1db gain nf 06877-003 figure 3. gain, p1db, oip3, and noise figure vs. frequency 16 10 frequency (ghz) gain (db) 5.75.34.94.54.13.73.3 2.92.5 2.11.71.30.90.5 15 14 13 12 11 +25c ?40c +85c 06877-004 figure 4. gain vs. frequency and temperature 0 ?45 06 frequency (ghz) s11, s22, s12 (db) ?5 ?10 ?15 ?20 ?25 ?30 ?35 ?40 12345 s22 s11 s12 06877-005 figure 5. input return loss (s11), output return loss (s22), and reverse isolation (s12) vs. frequency 45 0 frequency (ghz) oip3 and p1db (dbm) 40 35 30 25 20 15 10 5 5.75.34.94.54.13.73.3 2.92.5 2.11.71.30.90.5 oip3 (+25c) oip3 (?40c) oip3 (+85c) p1db (+85c) p1db (+25c) p1db (?40c) 06877-006 figure 6. oip3 and p1db vs. frequency and temperature 50 10 ?5 15 p out (dbm) oip3 (dbm) 45 40 35 30 25 20 15 ?3?1135791113 500mhz 2ghz 900mhz 2.4ghz 3.5ghz 06877-007 figure 7. oip3 vs. output power (p out ) and frequency 8 2 06 frequency (ghz) noise figure (db) . 0 7 6 5 4 3 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 ?40c +25c +85c 06877-008 figure 8. noise figure vs. frequency and temperature
adl5541 rev. 0 | page 9 of 12 30 0 37.0 oip3 (dbm) percentage (%) 25 20 15 10 5 38.5 40.0 41.5 43.0 06877-009 figure 9. oip3 dist ribution at 900 mhz 25 0 19.4 p1db (dbm) percentage (%) 20 15 10 5 19.5 19.6 19.7 19.8 19.9 20.0 20.1 06877-010 figure 10. p1db distribution at 900 mhz 25 0 15.08 gain (db) percentage (%) 20 15 10 5 15.11 15.14 15.17 15.20 15.23 15.26 06877-011 figure 11. gain distribution at 900 mhz 30 0 3.30 3.36 3.42 3.48 3.54 3.60 3.66 3.72 3.78 noise figure (db) percentage (%) 25 20 15 10 5 06877-012 figure 12. noise figure distribution at 900 mhz
adl5541 rev. 0 | page 10 of 12 basic connections the basic connections for operating the adl5541 are shown in figure 13 . recommended components are listed in table 5 . the input and output should be ac-coupled with appropriately sized capacitors (device characterization was performed with 33 pf capacitors). a 5 v dc bias is supplied to the amplifier via gnd (pin 6) and through a biasing inductor connected to rfout (pin 8). the bias voltage should be decoupled using a 1 f capacitor, a 1.2 nf capacitor, and two 68 pf capacitors. vcc 3gnd 6 gnd 4cb 5 vpos 1rfin 8 rfout 2gnd 7 gnd adl5541 c4 68pf c5 1.2nf c6 1f vcc c2 33pf c1 33pf rfin rfou t l1 47nh c3 1f gnd c7 68pf 06877-013 figure 13. basic connections for operation between 50 mhz and 500 mhz, a larger biasing choke and ac coupling capacitors are necessary (see table 5 ). figure 14 shows a plot of the input return loss, the output return loss and the gain with these components. at 100 mhz, the adl5541 achieves an oip3 of 38 dbm (p out = 0 dbm per tone). the noise figure performance for operation from 50 mhz to 500 mhz is shown in figure 15 . when operating below 50 mhz, the adl5541 exhibits gain peaking, and the input and output match degrade significantly. 17.0 12.0 50 500 frequency (mhz) gain (db) 16.5 16.0 15.5 15.0 14.5 14.0 13.5 13.0 12.5 ? 5 ?30 return loss (db) ?10 ?15 ?20 ?25 100 150 200 250 300 350 400 450 s11 s21 s22 06877-014 figure 14. input return loss (s11), output return loss (s22), and gain (s21) vs. frequency 4.5 2.0 50 500 frequency (mhz) noise figure (db) 4.0 3.5 3.0 2.5 100 150 200 250 300 350 400 450 06877-015 figure 15. noise figure vs. frequency from 50 mhz to 500 mhz soldering information and recommended pcb land pattern figure 16 shows the recommended land pattern for the adl5541. to minimize thermal impedance, the exposed paddle on the package underside should be soldered down to a ground plane along with pin 2, pin 3, pin 6, and pin 7. if multiple ground layers exist, they should be stitched together using vias (a minimum of five vias is recommended). for more information on land pattern design and layout, refer to application note an-772, a design and manufacturing guide for the lead frame chip scale package (lfcsp) . pin 1 pin 4 pin 8 pin 5 1.85mm 2.03mm 1.78mm 0.5mm 0.71mm 1.53mm 06877-016 figure 16. recommended land pattern table 5. recommended components for basic connections frequency c1 c2 c3 l1 c4 c5 c6 c7 50 mhz to 500 mhz 0.1 f 0.1 f 1 f 470 nh (coilcraft 0603ls-471-nx or equivalent) 68 pf 1.2 nf 1 f 68 pf 500 mhz to 6000 mhz 33 pf 33 pf 1 f 47 nh (coilcraft 0603cs-47-nx or equivalent) 68 pf 1.2 nf 1 f 68 pf
adl5541 rev. 0 | page 11 of 12 evaluation board figure 19 shows the schematic for the adl5541 evaluation board. the board is powered by a single 5 v supply. the components used on the board are listed in table 6 . power can be applied to the board through clip-on leads (vcc and gnd) or through a 2-pin header (w1). 06877-017 figure 17. evaluation board layout (bottom) 06877-018 figure 18. evaluation board layout (top) 3gnd 6 gnd 4cb 5 vpos 1rfin 8 rfout 2gnd 7 gnd adl5541 c4 68pf c5 1.2nf c6 1f vcc c2 33pf c1 33pf rfin rfout l1 47nh c3 1f gnd c7 68pf c8 open c9 open vcc w1 06877-019 dut1 figure 19. evaluation board schematic table 6. evaluation board configuration component function default value dut1 gain block adl5541 c1, c2 ac coupling capacitors 33 pf, 0402 c3 low frequency bypass capacitor 1 f, 0805 c4, c5, c6, c7, c8, c9 power supply decoupling capacitors c4 and c7 = 68 pf, 0603 c5 = 1.2 nf, 0603 c6 = 1 f, 0805 c8 and c9 = open l1 dc bias inductor 47 nh, 0603 (coilcraft 0603cs-47-nx or equivalent) vcc and gnd clip-on terminals for power supply w1 2-pin header for connection of ground and supply via cable
adl5541 rev. 0 | page 12 of 12 outline dimensions 0 61507-b 1 exposed pa d (bottom view) 0.50 bsc pin 1 indicator 0.50 0.40 0.30 top view 12 max 0.70 max 0.65 typ 0.90 max 0.85 nom 0.05 max 0.01 nom 0.20 ref 1.89 1.74 1.59 4 1.60 1.45 1.30 3.25 3.00 sq 2.75 2.95 2.75 sq 2.55 5 8 pin 1 indicator seating plane 0.30 0.23 0.18 0.60 max 0.60 max figure 20. 8-lead lead frame chip scale package [lfcsp_vd] 3 mm 3 mm body, very thin, dual lead (cp-8-2) dimensions shown in millimeters ordering guide model temperature range package description package option branding adl5541acpz-r7 1 ?40c to +85c 8-lead lfcsp_vd, tape and reel cp-8-2 q13 ADL5541-EVALZ 1 evaluation board 1 z = rohs compliant part. visit www.analog.com/rfamps for the latest information on the analog devices, inc., entire rf amplifier portfolio. visit www.analog.com/r f for the latest information on the analog devices entire rf portfolio. ?2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d06877-0-7/07(0)

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