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data sheet skyworks doc. no. 101432b proprietary information and specifications are subject to change march 12, 2002 CX42054 1700 ? 2200 mhz high dynamic range, diversity receiver front end skyworks? CX42054 is an integrated, high-dynamic range, low-noise receiver down converter for two-channel diversity systems. it includes a low noise amplifier (lna) followed by a double-balanced active mixer. the CX42054 has dual local oscillator (lo) inputs, selected using an external switch interface. the internal attenuator is integrated with the lna. the attenuator function is also controlled using an externally controlled cmos-compatible interface. figure 1 shows a functional block diagram for the CX42054. the 24-pin plastic quad flat pack (pqfp) device package and pinout are shown in figure 2. rf a lna lna attenuator attenuator rf balun rf balun rf b attn control lo 1 lo 2 lo select ir filter ir filter if a if b c1249 lna lna amp figure 1. CX42054 functional block diagram distinguishing features ? high 3 rd order input intercept point (iip3) mixer and lna ? wideband rf input frequency range (1700 to 2200 mhz) ? single or two-channel applications ? use with lna-mixer cascaded or mixer-only ? bias-selectable lna/mixer functions ? integrated solid state attenuator ? cmos-compatible control interfaces ? 5 v supply operation ? ?20 c to +85 c operating range ? supports frequency hopping applications applications ? pcs/dcs/umts communications ? mobile radio systems ? wll ? wlan ? industrial, scientific, medical (ism) band applications 1 24 23 22 21 20 19 7 8 9 10 11 12 2 3 4 5 6 18 17 16 15 14 13 c1250 gnd lo_1 attn lo_sel lo_2 vss lna_inb l_gndb l_outb mgndb m_inpb m_innb lna_ina l_gnda l_outa mgnda m_inpa m_inna ifna ifpa lo_gnd vdd ifpb ifnb figure 2. CX42054 pinout ? 24-pin pqfp package
CX42054 diversity receiver front end 2 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 technical description the CX42054 consists of two identical channels, a and b, that were specifically designed for diversity in base station applications. each channel consists of a single-ended lna and a double- balanced differential mixer. the lnas share a common cmos- compatible attenuator control switch, which bypasses the lna, providing 20 db of attenuation. each channel shares two independent lo signals, lo1 and lo2, that are selected using a common cmos-compatible control signal. with this ability, the device can be used in applications where frequency hopping is required. the lnas and mixers are independently biased. this allows design flexibility with power management functions in base station receivers. electrical and mechanical specifications the signal pin assignments and functions are described in table 1. the absolute maximum ratings of the CX42054 are provided in table 2. the recommended operating conditions are specified in table 3 and electrical specifications are provided in table 4. table 5 provides additional electrical specifications for cascaded channel performance. typical performance characteristics of the CX42054 are illustrated in figures 3 through 9. table 1. CX42054 signal descriptions pin # name description pin # name description 1 gnd ground 13 ifnb channel b negative differential mixer if output 2 lo_1 local oscillator 1 input for channels a and b 14 ifpb channel b positive differential mixer if output 3 attn channels a and b attenuator control 15 vdd positive supply voltage 4 lo_sel lo_1/lo_2 select control 16 lo_gnd local oscillator ground 5 lo_2 local oscillator 2 input for channels a and b 17 ifpa channel a positive differential mixer if output 6 vss negative supply voltage 18 ifna channel a negative differential mixer if output 7 lna_inb channel b lna input 19 m_inna channel a negative differential mixer input 8 l_gndb channel b lna ground 20 m_inpa channel a positive differential mixer input 9 l_outb channel b lna output 21 mgnda channel a mixer ground 10 mgndb channel b mixer ground 22 l_outa channel a lna output 11 m_inpb channel b positive differential mixer input 23 l_gnda channel a lna ground 12 m_innb channel b negative differential mixer input 24 lna_ina channel a lna input
diversity receiver front end CX42054 101432b skyworks 3 march 12, 2002 proprietary information and specifications are subject to change table 2. CX42054 absolute maximum ratings parameter symbol min typical max units positive dc power supply vdd +5.5 v negative dc power supply vss ?6.0 v power dissipation p d +2.25 w input power p in +15 dbm thermal resistance r th +25 c/w operating temperature t opr ?20 +85 c storage temperature t stg ?40 +125 c note : no damage to device if only one parameter is applied at a time with other parameters at nominal conditions. table 3. CX42054 recommended operating conditions parameter symbol min typical max units positive dc supply voltage vdd +4.75 +5.0 +5.25 v negative dc supply voltage vss ?4.75 ?5.0 ?5.25 v operating temperature t opr 0 +50 c
CX42054 diversity receiver front end 4 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 table 4. CX42054 electrical characteristics (+25 c, voltage supply = 5 v, lo = 0 dbm, rf frequency = 1900 mhz, if frequency = 135 mhz, mixer bias = 55 ma) parameter test condition min typical max units low noise amplifier gain 11.0 13.5 db noise figure (nf) 2.6 3.5 db input ip3 +13 +16 dbm ?1 db compression point +2.0 +5.0 dbm rf rf input frequency 1700 2200 mhz rf input (note 1) rf = 1700 mhz to 2000 mhz rf = 1900 mhz 1.5:1 1.5:1 2.0:1 2.0:1 vswr vswr rf output (note 1) rf = 1700 mhz to 2000 mhz 1.5:1 2.0:1 vswr mixer (note 2) conversion gain rf = 1800 to 2000 mhz, lo = 1750 mhz rf = 1700 to 1900 mhz, lo = 1950 mhz rf = 1900 mhz, lo = 1765 mhz rf = 1900 mhz, lo = 2035 mhz ?3.0 ?3.0 ?3.0 ?3.0 ?1.5 ?2.0 ?1.0 ?1.5 db db db db single side band nf rf = 1800 mhz to 2000 mhz, lo = 1750 mhz rf = 1700 mhz to 1900 mhz, lo = 1950 mhz 13 13 14 15 db db input ip3 rf = 1900 mhz, lo= 1765 mhz (mixer bias = 80 ma) rf = 1900 mhz, lo = 1765 mhz rf = 1900 mhz, lo = 2035 mhz +18 +15 +15 +24 +21 +21 dbm dbm dbm rf to if leakage rf = 1900 mhz, lo = 1765 mhz rf = 1900 mhz, lo = 2035 mhz ?35 ?35 dbm dbm lo to if leakage lo = 1765 mhz lo = 2035 mhz ?45 ?40 dbm dbm ?1db compression point (mixer bias = 80 ma) ?1 db compression point ? if product suppression +11 +9 +17 +15 ?70 ?65 dbm dbm dbc local oscillator lo input frequency 1700 2200 mhz lo input (note 1) 1.5:1 2.0:1 vswr lo level input ?5 0 +5 dbm intermediate frequency if output frequency 50 250 mhz if output (note 1) if = 50 mhz to 200 mhz if = 135 mhz 1.5:1 1.5:1 2.0:1 2.0:1 vswr vswr note 1: in a 50 ? system obtai ned with external matching components on input/output ports. see figure 10 and table 6 for matching network configuration and element values. note 2 : include rf balun and if transformer losses.
diversity receiver front end CX42054 101432b skyworks 5 march 12, 2002 proprietary information and specifications are subject to change table 5. full channel performance (+ 25 c, voltage supply = 5 v, lo = 0 dbm, rf frequency = 1900 mhz, if frequency = 135 mhz) parameter test condition min typical max units rf input (note 1) 1.5:1 vswr nf (note 2) 4.6 7.0 db gain (note 3) 7 11 db input ip3 (note 4) mixer bias = 80 ma mixer bias = 55 ma +4 +3 +10 +9 dbm dbm 1 db compression point (note 5) mixer bias = 80 ma mixer bias = 55 ma ?1 ?2 +5 +4 dbm dbm 1/2 if product suppression ?65 ?55 dbc channel a to b isolation 35 40 db lo leakage at rf input ?35 ?30 dbm lo1 to lo2 isolation 30 35 db supply current @ +5.0 v, both channels supply current @ ?5.0 v, both channels 340 10 360 15 ma ma note 1 : in a 50 ? system obtai ned with external matching network on lna and mixer input ports. see figure 10 and table 6 for network elements and frequency ranges. note 2 : calculated using the following equation: ? + + = 10 g 10 1 10 loss nf 10 10 10 nf log 10 nf lna irfilter mixer lna cascaded note 3 : calculated using the following equation: mixer irfilter lna cascaded g loss g gain conversion + ? = note 4: calculated using the following equation: () ?

+

? ? = 1 10 3 iip 10 1 10 loss g 3 iip 10 1 log 10 3 iip lna irfilter lna mixer note 5: calculated using the following equation: less is whichever p or loss g p p lna db irfilter lna mixer db system db ), ( )) ( ( , 1 , 1 , 1 ? ? =
CX42054 diversity receiver front end 6 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 figure 3. lna (iip3 = +19 dbm, input power = ?15 dbm) figure 4. mixer with high side lo (iip3 = +20 dbm, input power = ?10 dbm)
diversity receiver front end CX42054 101432b skyworks 7 march 12, 2002 proprietary information and specifications are subject to change figure 5. mixer with low side lo (iip3 = +20 dbm, input power = ?10 dbm) 0 2 4 6 8 10 12 14 16 1700 1750 1800 1850 1900 1950 2000 frequency (mhz) gain(db) / iip3(dbm) 2 2.2 2.4 2.6 2.8 3 nf (db) gain(db) iip3 (dbm) nf(db) figure 6. lna gain, nf, and iip3 vs frequency (values obtained with a 1900 mhz input match)
CX42054 diversity receiver front end 8 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 35 40 45 50 55 60 10 11 12 13 14 15 16 17 18 19 20 bias resistor (ohms) mixer bias current (ma) figure 7. mixer bias current vs. bias resistor (ra2, rb2) -1.5 -1.3 -1.1 -0.9 -0.7 -0.5 35 40 45 50 55 60 mixer bias current (ma) conv. gain (db) 12 12.5 13 13.5 14 14.5 15 nf (db) conv. gain nf figure 8. mixer conversion gain vs. bias current 21 22 23 24 25 26 35 40 45 50 55 60 mixer bias current (ma) iip3 (dbm) 13 14 15 16 17 18 p1db (dbm) iip3 p1db figure 9. mixer iip3 and 1 db compression point vs. bias current
diversity receiver front end CX42054 101432b skyworks 9 march 12, 2002 proprietary information and specifications are subject to change evaluation board description the CX42054 evaluation board is used to test the CX42054 mixer and lna performance. the CX42054 evaluation board schematic diagram is shown in figure 10. table 6 contains i/o matching network components used in the schematic. the schematic shows the basic design of the evaluation board for the rf range of 1800 to 2000 mhz. the if matching circuitry has been optimized for 100 to 200 mhz. figure 11 displays the evaluation board layout. circuit design configurations ________________________ the following design considerations are general in nature and must be followed regardless of final use or configuration: 1. paths to ground should be made as short as possible. 2. the downset paddle of the pqfp provides necessary electrical grounding and is the main thermal conduit for heat dissipation. any printed circuit board using the CX42054 must have sufficient solder mask clearance beneath the ic (i.e., approximately 110 percent of the downset paddle). this provides adequate solder coverage for the downset paddle and minimizes excessive lead standoff. multiple vias to the grounding layer beneath the device are required for maximum thermal relief. 3. the inclusion of external bypass capacitors on the vss and vdd voltage inputs of the lnas and mixers is recommended. the application schematic in figure 10, shows these capacitors (1000 pf and 12 pf) in shunt with each control switch, as well as the vss supply. the 1000 pf capacitor serves as a low frequency bypass, while the 12 pf capacitor prevents any rf signals from coupling on to the dc supply voltages. it is recommended that the bypass capacitors be placed as close as possible to the CX42054 for best results. 4. the lna receives its bias voltage via the lna output pin. the use of a blocking capacitor (rf short) on the lna input/output and mixer input is required. 5. ceramic or wire-wound balanced transformers (baluns) may be used to provide the differential input to the active mixer. the secondary center tap of these baluns provides the dc return path for the mixer bias current. balun selection criterion should include dc current handling capability, differential phase/amplitude balance, insertion loss, and temperature performance. 6. the application of an image-reject filter between the lna and mixer is recommended. 7. for proper switching of the control interface circuits, the following conditions must be met: off: 0 vdc v in 0.5 vdc @ 30 a on: 3.0 vdc v in 3.0 vdd @ 120 a lna testing procedure_______________________________ use the following procedure to set up the CX42054 evaluation board for lna testing. refer to figure 12 for guidance: 1. set all the dip switches to off. for information on the switch settings, refer to table 7. 2. connect the CX42054 evaluation board to 5 vdc power supplies using insulated supply cables. vdd should be set to +5.0 v and vss to ?5.0 v. if available, enable the current limiting function of the power supplies as follows: + 5 vdc supply current limit = 200 ma ?5 vdc supply current limit = 50 ma connect red and yellow banana plugs to vdd, a purple plug to vss, and a black plug to ground. connect a three- slot plug to the side (jp1) and a two-slot plug to the top (jp2). 3. connect a signal generator to the lna a input port (j1). set the generator to the desired rf frequency at a power level of ?20 dbm, but do not enable. 4. connect a spectrum analyzer to the output port of lna a (j2). 5. enable the power supply by turning switches #2 and #4 on. 6. enable the rf signal and take measurements. 7. repeat steps 3 through 6 for lna b, but use switches #4 and #5 to enable the power supply. mixer testing procedure______________________________ use the following procedure to set up the CX42054 evaluation board for mixer testing. refer to figure 13 for guidance: 1. set all the dip switches to off. for information on the switch settings, refer to table 7. 2. connect the CX42054 evaluation board to 5 vdc power supplies using insulated supply cables. vdd should be set to +5.0 v and vss to ?5.0 v. if available, enable the current limiting function of the power supplies as follows: + 5 vdc supply current limit = 200 ma ?5 vdc supply current limit = 50 ma connect red and yellow banana plugs to vdd, a purple plug to vss, and a black plug to ground. connect a three- slot plug to the side (jp1) and a two-slot plug to the top (jp2). 3. connect a signal generator to the lo1 input port (j9). set the generator to the desired lo frequency at a power level of 0 dbm, but do not enable.
CX42054 diversity receiver front end 10 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 lo_select mixer_in_b if_out_b switch 1-2 switch 1-7 switch 1-6 switch 1-5 mixer_in_a if_out_a monitor sw 1-5 sw 1-7 atten_ctl sw 1-4 sw 1-3 sw 1-1 sw 1-6 sw 1-2 lo1_in lna_out_a lna_out_b lo2_in lna_in_a lna_in_b 1 24 23 22 21 20 19 5 1 3 2 4 2 3 4 5 6 18 17 16 15 14 13 25 7 8 9 10 11 12 4 2 3 1 5 1 1 1 1 1 1 1 1 2 12 3 4 5 6 7 14 13 12 11 10 9 8 1 ca1 22 pf c5 22 pf c2 12 pf c3 12 pf c6 22 pf cb1 22 pf cb15 1.5 pf cb6 1000 pf cb2 12 pf cb9 2.0 pf xb1 10 pf cb5 12 pf cb7 1000 pf c1 1000 pf c7 12 pf lb1 4.7 nh lb2 4.7 nh lb4 68 nh la4 68 nh xb2 1.2 nh pin 25 d1 1n4736a-010 j2 sma j1 sma jp2 header 2 jp1 header 3 j9 sma j10 sma ca16 dni xa3 0.5 pf j5 sma t4 tc4-1w j6 sma j7 sma rb1 10 sw1 sw dip-7 t1 ldb15c500a1900 ldb15c500a1900 d2 1n4736a-010 l2 dni j3 sma la1 4.7 nh la2 4.7 nh ca6 12 pf xa2 1.2 nh ca9 2.0 pf xa1 10 pf ?5v +5 v ?5 v c1255 c10 1.5 pf cb16 dni xb3 0.5 pfi ca15 1.5 pf ca9 1.5 pf ca6 1000 pf ca2 12 pf ca7 1000 pf l1 dni t3 cb8 12 pf cb10 1000 pf cb4 dni c8 12 pf c4 1000 pf ca8 12 pf ca10 1000 pf ca4 dni switch 1-3 switch 1-4 switch 1-1 1 j8 sma 1 j4 sma 6 4 3 2 1 t2 tc4-1w 6 4 3 2 1 ra1 10 1 1 2 3 figure 10. CX42054 application schematic table 6. input/output matching network components for application schematic rf frequency ca1, cb1 ca15, cb15 la1, lb1 t1, t2 xa1, xb1 xa2, xb2 xa3, xb3 1700-1900 mhz 22 pf 1.5 pf 4.7 nh ldb15c500a1747 22 pf 3.3 nh 1.0 pf 1800-2000 mhz* 22 pf 1.5 pf 4.7 nh ldb15c500a1900 10 pf 1.2 nh 0.5 pf 2000-2200 mhz 22 pf 1.5 pf 4.7 nh ldb15c500a2100 0 ? 2.7 pf dni if frequency la4, lb4 ca4, cb4 50-100 mhz 68 nh dni 100-200 mhz 68 nh dni note 1: standard evaluation kit tw10-d212 is optimized for the 1800 to 2000 mhz frequency range. the schematic diagram shown in figure 10 applies to evaluation kit tw10-d212.
diversity receiver front end CX42054 101432b skyworks 11 march 12, 2002 proprietary information and specifications are subject to change j1 j2 j3 j4 d1 sw1 jp2 t2 t1 t3 jp1 d2 tw11?d210? j8 j7 j6 j5 j10 j9 c9 conexant sys, inc CX42054 eval fixture la1 lb1 lb2 cb9 cb2 cb6 xb1 xb2 xb3 lb4 cb4 ra1 ca7 ca5 ca9 la2 c5 la4 xa2 xa3 ca6 ca4 ca9 ca10 c8 c4 cb8 cb10 ca2 xa1 ca15 ca16 cb15 cb16 c6 c7 c2 c3 cb5 rb1 cb7 ca1 cb1 c10 l1 l2 t4 u1 c1272 figure 11. CX42054 evaluation board layout j1 j2 j3 j4 jp2 +5 vdc gnd ? 5 vdc jp1 j8 j7 j6 j5 j10 j9 conexant sys, inc CX42054 eval fixture c1316a rf signal generator spectrum analyzer power supply dip switch settings for lna a on 1234567 dip switch settings for lna b on 1234567 figure 12. CX42054 evaluation board lna testing configuration
CX42054 diversity receiver front end 12 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 table 7. CX42054 switch pack description switch name description #1 v mix_a on enables mixer a #2 v lna_a on enables lna a #3 v mix_b on enables mixer b #4 vdd on enables vdd #5 v lna_b on enables lna b #6 v los elect on selects lo1, off selects lo2 #7 v attenuator on enables attenuation j1 j2 j3 j4 jp2 +5 vdc gnd ? 5 vdc jp1 j8 j7 j6 j5 j10 j9 conexant sys, inc CX42054 eval fixture c1317a rf signal generator rf signal generator spectrum analyzer power supply dip switch settings for mixer a on 1234567 dip switch settings for mixer b on 1234567 figure 13. CX42054 evaluation board mixer testing configuration
diversity receiver front end CX42054 101432b skyworks 13 march 12, 2002 proprietary information and specifications are subject to change 4. connect a signal generator to the mixer a input port (j3). set the generator to the desired rf frequency at a power level of 0 dbm, but do not enable. 5. connect a spectrum analyzer to the output port of mixer a (j4). 6. enable the power supply by turning switches #1 and #4 on. 7. enable lo1 by turning switch #6 on. 8. enable the lo signal, then enable the rf signal and take measurements. 9. repeat steps 4 through 8 for mixer b, but use switches #3 and #4 to enable the power supply. if lo2 is desired, turn switch #6 off and connect the lo signal generator to the lo2 input port (j10). caution: if any of the input signals exceed the rated maximum values, the CX42054 evaluation board can be permanently damaged. package dimensions figure 14 shows the package dimensions for the 24-pin CX42054 pqfp and figure 15 provides the tape and reel dimensions. package and handling information since the device package is sensitive to moisture absorption, it is baked and vacuum packed before shipping. instructions on the shipping container label regarding exposure to moisture after the container seal is broken must be followed. otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. if the part is attached in a reflow oven, the temperature ramp rate should not exceed 10 c per second. maximum temperature should not exceed 225 c and the time spent at a temperature that exceeds 210 c should be limited to less than 10 seconds. if the part is manually attached, precaution should be taken to ensure that the part is not subjected to a temperature that exceeds 300 c for more than 10 seconds. care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. for additional details on both attachment techniques, precautions, and recommended handling procedures, refer to the skyworks? document solder reflow application note , document number 101536. production quantities of this product are shipped in a standard tape and reel format. for packaging details, refer to the skyworks? document tape and reel information application note , document number 101568. electro-static discharge (esd) sensitivity the CX42054 is a static-sensitive electronic device. do not operate or store near strong electrostatic fields. take proper esd precautions. pin #1 5 equal spaces 8.05 0.05 6.35 0.25 11.07 0.15 8.05 0.05 2.125 0.075 1.27 0.25 typical 0.25 typical 8.05 0.05 11.07 0.15 c1251 all measurements are in millimeters 0.05 typical 0.505 0.025 figure 14. CX42054 24-pin pqfp package dimension drawing
CX42054 diversity receiver front end 14 skyworks 101432b proprietary information and specifications are subject to change march 12, 2002 c1271 16.00 0.10 0.330 0.013 5 o max 11.43 0.10 5 o max 11.35 0.10 2.29 0.10 4.00 0.10 1.50 0.10 1.50 0.25 2.00 0.10 1.75 0.10 24.00 +0.30/-0.10 11.50 0.10 note: 1. carrier tape: black conductive polycarbonate. 2. cover tape material: transparent conductive psa. 3. cover tape size: 21.3 mm width. 4. all dimensions are in millimeters. a b b b a a figure 15 CX42054 24-pin pqfp tape and reel dimensions
diversity receiver front end CX42054 101432b skyworks 15 march 12, 2002 proprietary information and specifications are subject to change ordering information model name ordering part number evaluation kit part number CX42054 1700-2200 mhz receiver front end/downconverter CX42054-11 tw10-d212 ? 2002, skyworks solutions, inc. all rights reserved. information in this document is provided in connection with skyworks solutions, inc. ("skyworks") products. these materials are provided by skyworks as a service to its customers and may be used for informational purposes only. skyworks assumes no responsibility for errors or omissions in these materials. skyworks may make changes to its products, specifications and product descriptions at any time, without notice. skyworks makes no commitment to update the i nformation and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from future changes to its products and product desc riptions. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. exce pt as may be provided in skyworks? terms and conditions of sale for such products, skyworks assumes no liability whatsoever. these materials are provided "as is" without warranty of any kind, either express or implied, relating to sale and/or use of skyworks? products including warranties relating to fitness for a particular purpose, merchantability, performance, quality or non-infringement of any patent, copyright or other intellectual property right. skyworks further does not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials. skyworks shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or l ost profits that may result from the use of these materials. skyworks? products are not intended for use in medical, lifesaving or life-sustaining applications. skyworks? customers using o r selling skyworks? products for use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper use or sale. the following are trademarks of skyworks solutions, inc.: skyworks?, the skyworks symbol, and ?breakthrough simplicity??. produ ct names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. third-party brands and names are the property of their respective owners. additional information, posted at www. skyworksinc.com, is incorporated by reference.
general information: skyworks solutions, inc. 4311 jamboree rd. newport beach, ca 92660-3007 www.skyworksinc.com

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