general description the max2335 evaluation kit (ev kit) simplifies evalua- tion of the max2335 450mhz, cdma/ofdm lna/mixer. this kit allows evaluation of the device? low-noise amplifier (lna), downconverter, and buffer. figure 1 shows the max2335 ev kit schematic. the ev kit pro- vides 50 ? sma connectors for all rf and if input and output signals. features ? easy evaluation of the max2335 ? +2.9v to +3.3v single-supply operation ? all critical matching components included ? cdma-band rf ports matched to 450mhz ? sma connectors for all rf and if signal ports ? easy configuration of operating modes evaluates: max2335 max2335 evaluation kit ________________________________________________________________ maxim integrated products 1 ordering information designation qty description c1, c9 2 0.01? ?0% capacitors grm155r71c103k c2, c22, c24, c27 4 100pf ?% capacitors tdk c1005c0g1h101j c3?6, c8, c10, c12, c14, c17, c21, c30, c31, c33 0 open c7 1 3.9pf ?% capacitor emk105sj3r9jw-b c11, c18, c19, c20, c26, c28 6 1000pf ?0% capacitors tdk c1005x7r1h102k c16 1 6800pf capacitor tdk c1005x7r1e682k c23, c25 2 6.8pf ?% capacitors emk105rh6r8jw-b c29 1 22? ?% capacitor tajc226k010 j1?5 5 open ju1, ju3, ju4, ju5, ju7 5 1 x 3 headers sullins ptc36saan ju1?u8, ju10 9 shunts sullins stc02syan ju2, ju6, ju8, ju10 4 1 x 2 headers sullins ptc36saan l1 1 18nh ?% inductor (0402) toko ll1608-fh18nj l3, l10, l11, l12 4 open designation qty description l5 1 22nh ?% inductor (0402) toko ll1608-fh22nj l6 1 47nh ?% inductor (0603) coilcraft cs-47nxjbc l7, l8 2 270nh ?% inductors (0805) toko ll2012-fhlr27j l9 1 1nh ?% inductor (0402) coilcraft cs-1n0xjbw l13 1 47nh ?% inductor (0402) coilcraft cs-47nxgbw ln aou t, ifou t, ln ain , loin 4 sma connectors johnson 142-0701-801 mixin, loout 2 sma connectors johnson 142-0701-201 r1, r4, r5, r6, r8 51k ? ?% resistors (0402) r2, r9, r12, r13 4 open r3 1 18.2k ? ?% resistor (0402) r7 1 1k ? ?% resistor (0402) r10 1 24.3k ? ?% resistor (0603) r11, r16, l2 3 0 ? ?% resistors (0402) r14 1 20 ? ?% resistor (0402) r15 1 475 ? ?% resistor (0603) t1 1 balun transformer toko b5f 458db-1011 u1 1 max2335eti 28-pin tqfn-ep vcc, gnd 2 test points digi-key 5000k-nd component list 19-4008; rev 0; 2/06 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. part temp range ic package max2335evkit -40?c to +85?c 28 thin qfn-ep* * ep = exposed paddle.
evaluates: max2335 recommended test equipment ? power supply capable of providing 100ma at +2.9v to+3.3v ? two rf signal generators capable of delivering -70dbm to -10dbm of output power from 450mhz to 1200mhz (hp 8658c or equivalent) ? network analyzer covering the max2335 operating frequency range (hp 8753 or equivalent) ? spectrum analyzer covering the max2335 operating frequency range (hp 8561e or equivalent) ? ammeter (optional) for measuring supply current ? noise figure meter (optional) for measuring the noise figure of the lna and downconverters (hp 8970b or equivalent) quick start the max2335 ev kit is fully assembled and factory tested. follow the instructions in the connections and setup sec- tion for proper device evaluation. connections and setup this section provides a step-by-step guide to setting up the max2335 ev kit and testing the lna and down- converters. do not turn on the dc power or rf sig- nal generators until all connections are made. low-noise amplifier, high-gain high-linearity mode 1) set mode 0 (ju1), mode 1 (ju3), and mode 2 (ju4) on the ev kit to vcc (high). this enables the lna to oper- ate in the high-gain and high-linearity mode. 2) connect a dc supply preset to +3v (through an ammeter, if desired) to the ev kit? vcc and gnd terminals. do not turn on the supply. 3) perform a full two-port calibration on a network ana- lyzer at a -30dbm power level over a 400mhz to 500mhz frequency range. 4) connect port 1 and port 2 of the network analyzer to lnain and lnaout, respectively, to measure the gain at 465mhz. 5) the network-analyzer display should indicate a typ- ical gain of 16db at 465mhz after accounting for board losses. the input and output board losses are 0.3db at the 465mhz band. these losses are to be added to the measurements to obtain the perfor- mance of the lna. downconverter, high-gain high-linearity mode 1) turn off the dc supply. 2) remove the network analyzer from the lna input and output connections. the dc supply connec- tions for testing the downconverter mixer are the same as the lna section. 3) set the lo/2 jumper (ju5) to vcc to enable the lo divider circuit. 4) the mode setting for testing the downconverter mixer is the same as the lna section. 5) connect an rf signal generator (with output dis- abled) to the loin connector. set the frequency to 1150mhz and the output power to -7dbm. 6) connect another rf signal generator (with output disabled) to the mixin sma connector. set the fre- quency to 465mhz and the output power to -40dbm. 7) connect the spectrum analyzer to the ifout sma connector. set the spectrum-analyzer center fre- quency to 110mhz. 8) turn on the dc supply. enable the lo signal gener- ator and rf input signal generator outputs. 9) measure the peak of the 110mhz if signal on the spectrum analyzer. compensate the if signal con- version gain of the balun and the board losses. the balun loss is approximately 0.3db and the input and output board losses are 0.1db each. 10) the conversation gain is approximately 13db after corrections from step 9 are applied. max2335 evaluation kit 2 _______________________________________________________________________________________ supplier phone fax website avx 803-946-0690 803-626-2123 www.avx-corp.com ef johnson 402-474-4800 402-474-4858 www.efjohnson.com kamaya 219-489-1533 219-489-2261 www.kamaya.com murata 949-852-2001 949-852-2002 www.murata.com toko 708-297-0070 708-699-1194 www.toko.com component suppliers note: indicate that you are using the max2335 when contacting these suppliers.
checking noise figure noise figure measurements are sensitive to board and lab setup losses and parasitics. there are many tech- niques and precautions for measuring a low noise fig- ure . detailed explanation of these items goes beyond the scope of this document. for more information on how to perform this level of noise figure measurement, refer to the noise figure meter operating manual, as well as to the hewlett packard application note #57-2, noise figure measurement accuracy . pc board layout considerations the max2335 ev kit can serve as a board layout guide. keep pc board trace lengths as short as possible to minimize parasitics. keep decoupling capacitors close to the device, with a low-inductance connection to the ground plane. evaluates: max2335 max2335 evaluation kit _______________________________________________________________________________________ 3 max2335 u1 lnaout degen r lna gnd lnain mode1 mode2 r bias if_cdma+ if_cdma- n.c. buffen v cc v cc n.c. v cc n.c. n.c. i.c. mixin n.c. lo/2 lo_in n.c. i.c. lo_out n.c. ju2 c2 100pf l1 18nh c7 3.9pf r2 open lnaout c1 0.01 f ju10 c3 open c4 open vcc vcc c14 open lnain c16 6800pf l5 22nh c17 open c11 1000pf ju1 vcc r1 1k ? c18 1000pf c27 100pf c26 1000pf c28 1000pf ju3 vcc r4 1k ? c19 1000pf ju4 vcc r5 1k ? loin c22 100pf j2 open r12 open loout r13 open l13 47nh r9 open j3 open ju8 l11 open vcc r11 0 ? r7 1k ? c33 open c31 open c30 open vcc gnd vcc ju7 vcc r8 1k ? ju6 vcc l7 270nh c24 100pf c23 6.8pf c25 6.8pf l8 270nh 3 2 1 4 6 ifout r3 18.2k ? r14 20 ? l2 0 ? r15 475 ? l6 47nh mixin l10 open c10 open c21 open c9 0.01 f l3 open j4 open l12 open c6 open c5 open j5 open c8 open 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 c12 open r6 1k ? c20 1000pf r10 24.3k ? l9 1nh r16 0 ? j1 open ju5 vcc c29 22 f mode0 t1 balun toko 85f 45808-1011 figure 1. max2335 ev kit schematic
evaluates: max2335 max2335 evaluation kit 4 _______________________________________________________________________________________ figure 2. max2335 ev kit pc board layout?ront side
evaluates: max2335 max2335 evaluation kit _______________________________________________________________________________________ 5 figure 3. max2335 ev kit pc board layout?round layer 2
evaluates: max2335 max2335 evaluation kit 6 _______________________________________________________________________________________ figure 4. max2335 ev kit pc board layout?round layer 3
evaluates: max2335 max2335 evaluation kit _______________________________________________________________________________________ 7 figure 5. max2335 ev kit pc board layout?ack side
evaluates: max2335 max2335 evaluation kit 8 _______________________________________________________________________________________ figure 6. max2335 ev kit component placement guide?op silk
evaluates: max2335 max2335 evaluation kit maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 9 2006 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. figure 7. max2335 ev kit component placement guide?ottom silk
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