_________________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim?s website at www.maxim-ic.com. MAX3805 evaluation kit _______________ _______________ _______________ _______________ general description the MAX3805 dc-coupled evaluation kit (ev kit) simplifies evaluation of the MAX3805 10.7gbps adaptive equalizer. the ev kit enables full testing of device functions. sma connectors with 50 ? controlled- impedance transmission lines to the MAX3805 are provided for all cml input and output ports. _________________________ features ? dc-coupled evaluation kit ? sma connectors for all high-speed inputs and outputs ? fully assembled and tested _______________ ordering information part temp. range ic package MAX3805 evkit -40 c to +85 c 16 qfn ____________________ component list designation qty description c1-c5 5 0.1 f +10% ceramic capacitor (0402) c6 1 0.1 f +10% ceramic capacitor (0603) c7-c10 4 33 f +10% tantalum capacitors (case-b) j1-j4 4 sma connectors, tab contact jp1-jp5 5 2-pin headers, 0.1in centers gnd, v cc , v cc1 , v cc2 , v ee , tp4, tp5, tp9, tp10 9 test points digi-key 5000k-nd r7 1 500k ? variable resistor u1 1 MAX3805 ete none 3 shunts none 1 MAX3805 ev board none 1 MAX3805 data sheet ______________ component suppliers supplier phone fax digi-key 218-681-6674 218-681-3380 murata 814-237-1431 814-238-0490 coilcraft 847-639-6400 847-639-1469 avx 803-946-0690 803-626-3123 note: please indicate that you are using the MAX3805 when ordering from these suppliers. ________________________ quick start note: the MAX3805 ev kit is a dc-coupled evaluation board. use external coupling capacitors on the input and output when ac-coupling is desired. dc-coupled operation with positive v cc supplies can cause permanent damage to laboratory test equipment (oscilloscope, bert). the MAX3805 ev kit must be operated from a negative v ee supply when dc-coupled to normal laboratory equipment. 1) connect a ?3.3v power supply to v ee . connect the power supply ground to gnd and v cc . remove shunt on jp1; install shunts on jp2 and jp3. 2) connect tp9 to tp10. 3) apply a differential 9.953gbps input signal (400mv p-p to 1200mv p-p ) between sma connectors j1 and j2, (sdi+ and sdi-) 4) attach a differential high-speed oscilloscope with a 50 ? input to sma connectors j4 and j3 (sdo+ and sdo-) to observe the output of the equalizer. 19-2965; rev 0; 8 /03 evaluates: MAX3805
MAX3805 evaluation kit 2________________________________________________________________________________ . _ alternative supply configurations ac-coupled operation with ac-coupled operation with ac-coupled operation with ac-coupled operation with v v v v cc1 cc1 cc1 cc1 = v = v = v = v cc2 cc2 cc2 cc2 = +1.8v = +1.8v = +1.8v = +1.8v connect a +3.3v power supply to v cc . connect a +1.8v power supply to v cc1 and v cc2 . connect the power- supply ground to gnd. remove shunts jp2 and jp3. install shunt jp1. use external ac-coupling capacitors for connecting to external laboratory equipment (oscilloscope, bert). dc-coupled operation with dc-coupled operation with dc-coupled operation with dc-coupled operation with laboratory equipment laboratory equipment laboratory equipment laboratory equipment connect a +1.5v power supply to v cc . connect a -1.8v power supply to v ee . connect the power-supply ground to gnd. install shunts on jp2 and jp3. remove shunt on jp1. with this setup the part can be dc- coupled to external laboratory equipment (oscilloscope, bert) dc-coupled operation _____with oscilloscope and berts the MAX3805 is designed with dc-coupled inputs and outputs, implemented with internal 50 ? terminations to v cc1 (sdi+) and v cc2 (sdo+ ). laboratory oscilloscopes and berts normally terminate their inputs and outputs with 50 ? to ground. when the MAX3805 v cc s are connected to positive supply, a dc path exists from the power supply to the ports of the oscilloscope or bert. this configuration can cause permanent damage to the oscilloscope or bert. when the MAX3805 ev kit is being used with normal oscilloscopes or berts, either external ac-coupling must be provided or v cc1 and v cc2 must be connected to ground (i.e., using a negative v ee supply). failure to do so may permanently damage laboratory equipment. figure 1. MAX3805 ev kit schematic evaluates: MAX3805
MAX3805 evaluation kit _________________________________________________________________________________________ 3 evaluates: MAX3805 figure 2. MAX3805 component placement guide figure 3. MAX3805 pc board layout ? component side
MAX3805 evaluation kit 4________________________________________________________________________________ . figure 4. MAX3805 pc board layout ? ground plane figure 5. MAX3805 pc board layout ? power plane evaluates: MAX3805
MAX3805 evaluation kit evaluates: MAX3805 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circ uit 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 ________________ 5 ? 2003 maxim integrated products printed usa is a registered trademark of maxim integrated products. figure 6. MAX3805 pc board layout ? solder side
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