specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com page 1 of 5 june 2007 cv221-2a 1.9 ? 2.7 ghz dual-branch downconverter product features ? high dynamic range downconverter with integrated lo and if amplifiers ? dual channels for diversity ? +28 dbm input ip3 ? +11.5 dbm input p1db ? rf: 1900 ? 2700 mhz ? if: 65 ? 300 mhz ? +5v single supply operation ? rohs-compliant / pb-free 6x6mm 28-pin qfn package ? low-side lo configuration product description the cv221-2a is a dual-channel high-linearity down- converter designed to meet the demanding performance, functionality, and cost goals of current and next generation mobile infrastructure basestat ions and repeaters. it provides high dynamic range performance in a low profile rohs-compliant/lead-free su rface-mount leadless package that measures 6 x 6 mm square. it is ideally suited for high dynamic range receiver front ends using diversity receive channels. functionality includes frequency conversion and if amplification, while an integrated lo dr iver amplifier powers the passive mixer. the mcm is implemented with reliable and mature gaas mesfet and ingap hbt technology. typical applications include frequency downconversion used in 3g w-cdma and wimax basestation transceiver or repeater applications. functional diagram specifications (1) parameters units min typ max min typ max comments rf frequency range mhz 1900 ? 2400 2500 ? 2700 lo frequency range mhz 1600 ? 2335 2200 ? 2565 if frequency range mhz 65 ? 300 135 ? 300 see note 2 % bandwidth around if center frequency % 7.5 12 see note 3 if test frequency mhz 240 155 ssb conversion gain db 6.5 9.2 10.5 5.4 8.4 9.9 temp = 25 c gain drift over temp (-40 to 85 c) db 0.6 0.6 referenced to +25 c input ip3 dbm +24 +28 +17 +22 see note 4 input 1 db compression point dbm +11.5 +8.0 see note 4 noise figure db 11 13 see note 5 lo input drive level dbm -2.5 0 +2.5 -2.5 0 +2.5 lo-rf isolation db 12 9 p lo = 0 dbm lo-if isolation db 26 26 p lo = 0 dbm rf-if isolation db 25 25 branch-branch isolation db 45 40 return loss: rf port db 14 12 return loss: lo port db 14 14 return loss: if port db 13 10 operating supply voltage v +5 +5 supply current ma 315 330 315 330 see note 6 thermal resistance c / w 34 34 junction temperature c 160 160 see note 6 1. specifications when using the applica tion specific circuit (shown on page 3) with a low side lo = 0 dbm and if = 240 mhz i n a downconverting application at 25 c. 2. if matching components affect the center if frequency. proper component values for other if center frequencies than shown can be provided by emailing to a pplications.engineering@wj.com. 3. the if bandwidth of the converter is defined as 15% around any center frequency in its operating if frequency range. the bandwidth is determined with external components. specifications are valid around the total 7.5% bandwidth. ie. with a center frequency of 240 mhz, the specifications are valid from 240 18 mhz. 4. assumes the supply voltage = +5 v. iip3 is measured with f = 1 mhz with rfin = -5 dbm / tone. 5. assumes lo injection noise is filte red at the thermal noise floor, -174 dbm/hz, at the rf, if, and image frequencies. 6. the r1 resistor can be modified for the cv221- 2a to draw less current. changing it from 13 to 18 is expected to have the converter draw 17ma less cu rrent so that the converter will draw about 300ma typically under lo drive, while degrading the iip3 performance by 0.5 db. absolute maximum rating parameter rating operating case temperature -40 to +85 c storage temperature -55 to +150 c dc voltage +5.5 v junction temperature +220 c operation of this device above any of these parameters may cause permanent damage. ordering information part no. description cv221-2af 1.9-2.7ghz dual-branch downconverter (lead-free/rohs-compliant 6x6mm qfn package) cv221-2apcb240 fully assembled eval. board, if = 240mhz 1 2 3 4 5 6 7 21 20 19 18 17 16 15 28 27 26 25 24 23 22 8 9 10 11 12 13 14 if amp 2 if amp 1 lo driver amp bias gnd gnd gnd lo gnd gnd rf 1 input gnd bias gnd gnd gnd gnd mixer if1 gnd a mp1 input gnd gnd gnd mixe r if2 gnd gnd gnd if amp2 input if1 output if2 output if rf rf rf 2 input
specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com page 2 of 5 june 2007 cv221-2a 1.9 ? 2.7 ghz dual-branch downconverter device architecture / application circuit information typical 2.1 ghz downconverter perfor mance chain analysis (each branch) cumulative performance stage gain (db) input p1db (dbm) input ip3 (dbm) nf (db) current (ma) gain (db) input p1db (dbm) input ip3 (dbm) nf (db) lo amp / mmic mixer -8.4 20 33 9 115 -8.4 20 33 9 if amplifier 17.6 1 21 2.2 100 9.2 9 27.8 11 cv221-2a cumulative performance 315* 9.2 9 27.8 11 * the 2 nd branch includes another mixer and if amplifier, which increases the total current consumption of the mcm to be 315 ma. cv221-2a : the application circuit can be broken up into three main functions as denoted in the colored dotted areas above: rf/if diplexing (blue), if amplifier matching (green), and dc biasing (purple). there are various placeholders for chip component s in the circuit schematic so that a common pcb can be used for all wj dual-branch converters. external diplexer: this is only used with the cellular-band cv products. the mixer performs the diplexing internally for the cv221-2a; therefore the components shown in the diplexer section should be not be loaded except for l3, l10, l7, and l11, which should contain a 0 jumper. if amplifier matching: the if amplifier requires matching elements to optimize the performance of the amplifier to the desired if center frequency. since if bandw idths are typically on the order of 5 to 10%, a simple two element matching network, in the form of either a high-pass or low-pass filter structure, is sufficient to match the mmic if amplifier over these narrow bandwidths. proper component values for other if cent er frequencies can be provided by emailing to applications.engineering@wj.com. dc biasing: dc bias must be provided for the lo and if amplifiers in the converter. r1 sets the operating current for the last stage of the lo amplifier and is chosen to opt imize the mixer lo drive level. proper rf chokes and bypass capacitors are chosen for proper amplifier biasing at the intended frequency of operation. the ?+5 v? dc bias should be supplied dire ctly from a voltage regulator. wimax operation: there is no change to the application circuit for operation in the 2.5 to 2.7 ghz band. printed circuit board material: .014? fr-4 , 4 la y ers , .062? total thickness 1 2 3 4 5 6 7 21 20 19 18 17 16 15 28 27 26 25 24 23 22 8 9 10 11 12 13 14 if amp 2 if amp 1 lo driver amp bias gnd n/c gnd lo gnd n/c rf 1 input gnd bias gnd n/c gnd gnd mixer if1 gnd a mp1 input gnd gnd gnd mixe r if2 gnd gnd gnd if amp2 input if1 output if2 output if rf rf rf 2 input
specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com page 3 of 5 june 2007 cv221-2a 1.9 ? 2.7 ghz dual-branch downconverter application circuit: if = 240 mhz (cv221-2apcb240) rf = 1900 ? 2700 mhz, if = 240 mhz pcb layout circuit board material: .014? fr-4, 4 layers, .062? total thickness bill of materials ref. desig. component size r1 (1) 13 chip resistor 0805 r2, r3, r4, l3, l7 l10, l11 0 chip resistor 0603 r6, r7 8.2 chip resistor 0603 c1, c5, c10, c15 1000 pf chip capacitor 0603 c4, c11 (2) 3 pf chip capacitor 0603 c6, c12, c14 .018 f chip capacitor 0603 c7, c13 100 pf chip capacitor 0603 l1 120 nh chip inductor 0603 l4, l8 (2) 82 nh chip inductor 0603 l5, l9 220 nh chip i nductor 0805 c2, c3, c8, c9, c16 c17, c19, c20, c21 c22, l2, l6 shown on silkscreen, but not used in actual circuit. u1 cv221-2a wj converter qfn notes: 1. the r1 resistor can be modified for the cv221- 2a to draw less current. changing it from 13 to 18 is expected to have the converter draw 17ma less current so that the converter will draw about 300ma typical ly under lo drive, while degrad ing the iip3 performance by 0.5 db. 2. the values shown above have the if tuned at 240 mhz and will affect the optimal performance of the converter. for other fre quencies, these components need to be modified as follows: if amplifier matching ref. desig. 50 70 75 100 120 140 155 180 240 c4, c11 18 pf 15 pf 15 pf 8.2 pf 8. 2 pf 5.6 pf 5.6 pf 3.9pf 3.0 pf l4, l8 390 nh 220 nh 220 nh 180 nh 150 nh 150 nh 120 nh 110 nh 82 nh
specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com page 4 of 5 june 2007 cv221-2a 1.9 ? 2.7 ghz dual-branch downconverter typical downconversion performance plots performance using the circuitry on the cv221-2apcb240 evaluation board conversion loss vs rf frequency vs temperature lo = 0 dbm, if = 240 mhz, low-side lo 5 6 7 8 9 10 1800 1900 2000 2100 2200 2300 rf frequency (mhz) conversion loss (db) -40 c +25 c +85 c input ip3 vs rf frequency vs temperature lo = 0 dbm, if = 240 mhz, low-side lo 22 24 26 28 30 32 1800 1900 2000 2100 2200 2300 rf frequency (mhz) input ip3 (dbm) -40 c +25 c +85 c r-i isolation vs rf frequency 5 10 15 20 25 30 1900 1950 2000 2050 2100 2150 2200 rf frequency (mhz) r-i isolation (db) -40 c +25 c +85 c l-r isolation vs lo frequency referenced with lo = 0 dbm 0 5 10 15 20 25 1500 1600 1700 1800 1900 2000 2100 lo frequency (mhz) l-r isolation (db) -40 c +25 c +85 c l-i isolation vs lo frequency referenced with lo = 0 dbm 10 15 20 25 30 35 1500 1600 1700 1800 1900 2000 2100 lo frequency (mhz) l-i isolation (db) -40 c +25 c +85 c rf return loss vs rf frequency if = 240 mhz, low-side lo at 0 dbm -25 -20 -15 -10 -5 0 1800 1900 2000 2100 2200 2300 rf frequency (mhz) rf return loss (db) -40 c +25 c +85 c lo return loss vs frequency -25 -20 -15 -10 -5 0 1500 1600 1700 1800 1900 2000 2100 lo frequency (mhz) lo return loss (db) -40 c +25 c +85 c if return loss vs lo frequency if = 240 mhz, lo = 0 dbm -25 -20 -15 -10 -5 0 1500 1600 1700 1800 1900 2000 2100 lo frequency (mhz) if return loss (db) -40 c +25 c +85 c input p1db vs rf frequency if = 240 mhz, low-side lo at 0 dbm 4 6 8 10 12 14 1800 1900 2000 2100 2200 2300 rf frequency (mhz) input p1db (dbm) -40 c +25 c +85 c noise figure vs rf frequency if = 240 mhz, low-side lo at 0 dbm 4 6 8 10 12 14 1900 1950 2000 2050 2100 2150 2200 rf frequency (mhz) noise figure (db) -40 c +25 c +85 c
specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com page 5 of 5 june 2007 cv221-2a 1.9 ? 2.7 ghz dual-branch downconverter cv221-2af mechanical information this package is lead-free/ro hs-compliant. the plating material on the pins is annealed matte tin over copper. it is compatibl e with both lead-free (maximum 260 c reflow temperature) and leaded (maximum 245 c reflow temperature) soldering processes. outline drawing mounting configuration / land pattern product marking the component will be lasermarked with a ?cv221-2af? product label with an alphanumeric lot code on the top surface of the package. tape and reel specifications for this part will be located on the website in the ?application notes? section. esd / msl information esd rating: class 1b value: passes 500v to <1000v test: human body model (hbm) standard: jedec standard jesd22-a114 esd rating: class iii value: passes 500v to <1000v test: charged device model (cdm) standard: jedec standard jesd22-c101 msl rating: level 2 at +260 c convection reflow standard: jedec standard j-std-020 functional pin layout 1 2 3 4 5 6 7 21 20 19 18 17 16 15 28 27 26 25 24 23 22 8 9 10 11 12 13 14 if amp 2 if amp 1 lo driver amp bias gnd gnd gnd lo gnd gnd rf 1 input gnd bias gnd gnd gnd gnd mixer if1 gnd a mp1 input gnd gnd gnd mixer if2 gnd gnd gnd if amp2 input if1 output if2 output if rf rf rf 2 input pin function pin function 1 ch. 1 mixer rf input 15 n/c or gnd 3 lo amp bias 17 lo input 5 n/c or gnd 19 n/c or gnd 7 ch. 2 mixer rf input 21 +5 v 9 ch. 2 mixer if output 23 ch. 1 if amp output / bias 11 ch. 2 if amp input 25 ch. 1 if amp input 13 ch. 2 if amp output / bias 27 ch. 1 mixer if output the even numbered pins are hard grounded to the backside paddle internally. they can be grounded or not connected. the backside paddle is required to be grounded.
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