_________________________________________________________________ maxim integrated products 1 for free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 for small orders, phone 1-800-835-8769 evaluates: max3785utt max3785utt evaluation kit _______________ _______________ _______________ _______________ general description the max3785utt evaluation board and kit (ev kit) simplifies evaluation of the max3785utt 6.25 gbps equalizer. the ev kit enables testing of all the device functions. sma connectors with 50 ? controlled impedance to the max3785utt are provided for all input and output ports to facilitate connection to high-speed test equipment. _________________________ features ? fully assembled and tested ? connectors for all high-speed inputs and outputs ? calibration test strip. ____________________ component list designation qty description c2,c3 2 0.1 f, 10v minimum, 10% ceramic capacitor (0402) c1 1 33 f tantalum capacitor +/-10% b case avx tajb336m010r l1 1 4.7 h coilcraft 1008ct-040xjbc j3-8 6 sma connector edge mount (tab contact)johnson 142-0701-851 j1-j2 2 test point digi-key 5000k-nd u1 1 max3785utt 1 max3785utt rev a evaluation circuit board 1 max3785utt data sheet ______________ ordering information part temp. range ic package MAX3785UTTEVKIT -40 c to +85 c 16 tdfn ______________component suppliers supplier phone fax avx 843-444-2863 843-626-3123 coilcraft 847-639-6400 847-639-1469 murata 415-964-6321 415-964-8165 note: please indicate that you are using the max3785 when ordering from these suppliers. 19-3042; rev 0 ; 10/03
max3785utt evaluation kit 2 _________________________________________________________________________________________ evaluates: max3785ut t _________________________ quick start . 1. connect a +1.8v power supply to j1 (vcc). connect the power supply ground to j2. 2. connect dc blocks or bias t?s to the inputs in+ and in-. then connect a differential signal between 400 and 1600 mvp-p to the inputs using 50 ohm cables. if dc blocks are not used, then the high level for each input signal must be vcc. 3. connect dc blocks or bias t?s to the outputs out+ and out-. then connect signals from the dc blocks to an oscilloscope with 50 ohm input terminations. 4. at the signal source, start with a short and simple pattern such as a 2 7 -1 prbs. the data rate can be from 1.0 gbps to 6.4gbps. 5. evaluation: after the evkit has been initially checked out, evaluation can begin with a fr4 pc board. it is advisable to start with a board length of 20 inches and then progress to longer lengths. for data rates of 3.125gbps and below, the part will equalize board lengths up to 40 inches. for data rates 6.4 gbps and below the part will equalize board lengths up to 30 inches. when connecting the equalizer with the board, keep the cables from the board to the equalizer as short as possible. warning! the sma connectors are directly connected to the chip?s inputs and outputs. to avoid damage to laboratory equipment or device, always use dc blocks or bias t?s.
max3785utt evaluation kit _________________________________________________________________________________________ 3 evaluates: max3785utt figure 1. max3785utt ev kit schematic.
max3785utt evaluation kit 4 _________________________________________________________________________________________ evaluates: max3785ut t figure 2. max3785utta ev kit component placement guide ? component side (2x )
max3785utt evaluation kit _________________________________________________________________________________________ 5 evaluates: max3785utt figure 3. max3785utta ev kit pc board layout ? component side (2x), layer 1.
max3785utt evaluation kit 6 _________________________________________________________________________________________ evaluates: max3785ut t figure 4. max3785utta ev kit pc board layout ? ground plane (2x), layer 2.
max3785utt evaluation kit _________________________________________________________________________________________ 7 evaluates: max3785utt figure 5. max3785utt8a ev kit pc board layout ? power plane (2x), layer 3.
max3785utt evaluation kit 8 ____________________ maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2000 maxim integrated products printed usa is a registered trademark of maxim integrated products evaluates: max3785ut t figure 6. max3785utta ev kit pc board layout ? bottom side (2x), layer 4. maxim makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does maxim assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without lim itation consequential or incidental damages. ?typical? parameters can and do vary in different applications. all operation parameters, including ?typicals? must be validat ed for each customer application by customer?s technical experts. maxim products are not designed, intended or authorized for use as components in systems intende d for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the maxim product could create a situation where personal injury or death may occur.
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