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| 19-2481; Rev 0; 6/02 MAX3952 Evaluation Kit _______________ General Description The MAX3952 evaluation kit (EV kit) is an assembled surface-mount demonstration board that provides easy evaluation of the MAX3952 10Gbps 16:1 serializer with clock synthesis. _________________________Features Evaluates: MAX3952 +3.3V Single Supply Jumper-Enabled 27 - 1 On-Chip PRBS Generation Selectable Reference Clock Frequencies (644.53MHz, 161.1MHz, 155.52MHz, 622.08MHz) Fully Assembled and Tested ______________________________________________________________Component List DESIGNATION C1-C8, C10, C25-C29, C32, C33, C34, C42, C55 C11-C21, C23, C24, C30, C31, C35-C41, C43-C54 C9, C22 R3-R6 R12-R17, R19, R22, R23, R27, R54, R56 R7, R43 R2, R57 R8-R11, R18, R20, R21, R24, R25, R26, R28-R42, R44-R52 R53, R55 R1 L1, L2, L3 D1, D2 J1-J6, J27, J28 QTY 19 DESCRIPTION 0.1F 10% ceramic capacitors (0402) DESIGNATION J9-J20, J22-J25, J29-J48 JU10, JU36, JU39, JU40 34 DO NOT INSTALL 10F tantalum capacitors 10% AVX TAJB106K010 DO NOT INSTALL 0 resistors (0402) JU1-JU9, JU11-JU14, JU17-JU35, JU37, JU38, JU41, JU45, JU56 JU2-JU9, JU11-JU14, JU17-JU35, JU37, JU38, JU41, JU45, JU56 JU1-JU12, JU17, JU21, JU25, JU41, JU45, JU53, JU54, JU55 U1 U2 2 1 3 2 8 25.5k 1% resistors (0402) 100 5% resistor (0201) 56 nH inductors Coilcraft0603CS-56NXJBW Red LEDs SMA connectors, edgemount, tab centers EFJohnson 1420701-851 J7, J8, J21, J26 - - QTY 36 DESCRIPTION SMB connectors EFJohnson 131-1701-201 1x2 pin headers, 0.1" centers 4 34 1x3 pin headers, 0.1" centers 2 4 12 34 1x1 pin headers, 0.1" centers 2 2 768 1% resistors (0402) 30k 5% resistors (0402) 31 shunts Digi-Key S9000-ND 34 2k 1% resistors (0402) 1 1 4 1 1 MAX3952EGK 68-pin QFN MAX4429ESA 8-pin SO Test points Digi-Key 5000K-ND MAX3952 evaluation kit MAX3952 data sheet ______________ Ordering Information PART MAX3952EVKIT TEMP RANGE -40C to +85C IC PACKAGE 68 QFN-EP _________________________________________________________________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. MAX3952 Evaluation Kit _______________________________________________________________Quick Start 1) Evaluates: MAX3952 2) 3) 4) 5) 6) This quick start assumes that the board has the shunts removed from all the jumpers. With JU38 open, the MAX3952 operates with a 622.08MHz reference clock. Refer to Table 1 in the MAX3952 data sheet to configure the board for other reference clock frequencies. Apply a 622.08MHz reference clock to the REFCLK inputs at J1 and J2. Connect the PCLKO outputs at J27 and J28 to the PCLKI inputs. Ensure that polarities match. Enable the on-chip pattern generator by using JU56 to connect PRBSEN to VCC. Connect the SDO and SCLK outputs at connectors J3-J6 to a high-speed, 50 terminated oscilloscope. Use matched cable lengths for accurate timing measurements and best performance. 7) 8) Enable the serial output clock using JU1 to connect SCLKEN to VCC. Connect the middle pin of JU14 to GND for normal operation. Place a shunt at JU36 to connect FIFO_ERROR to FIFO_RESET. Power up the MAX3952 by placing +3.3V on J7 and GND to J8. J21 and J26 are used only if the LVDS inputs are AC-coupled and a separate common mode voltage is required. ______________ Component Suppliers SUPPLIER AVX Coilcraft Murata PHONE 843-444-2863 847-639-6400 415-964-6321 FAX 843-626-3123 847-639-1469 415-964-8165 Note: Please indicate that you are using the MAX3952 when ordering from these suppliers _____________Adjustment and Control Descriptions (see Quick Start first) COMPONENT JU1 NAME SCLKEN FUNCTION Connect to VCC to enable serial clock. 7 Enables the internal 2 - 1 PRBS generator. Connect to VCC to enable, to GND to disable. JU56 PRBSEN JU38 CKSET Open 622 MHz VCC 644MHz GND 155MHz 30k to GND 161MHz See Figure 4, or refer to in Table 1 in the MAX3952 data sheet Shunt to Connect FIFO_ERROR to FIFO_RESET. Connecting FIFO_RESET to VCC resets the FIFO. Placing a shunt at JU36 and leaving JU13 open is recommended for normal operation. Place a shunt at JU10 for normal operation. This connects the CMV to GND through 25.5k. Connects the PCLKI inputs to the CMV through 2.0k. Leave open for normal operation. When parallel inputs are not available, use these jumpers to set static levels on the 16 LVDS Data inputs. See Figures 1 and 2 for instructions. JU36 JU13 JU10 JU39, JU40 Jumpers on PDI_ Inputs FIFO_ERROR FIFO_RESET Common-Mode Voltage (CMV) Connect PCLKI to CMV Allows for Static Inputs 2 ________________________________________________________________________________________ MAX3952 Evaluation Kit ______________ Detailed Description Evaluates: MAX3952 The MAX3952 EV kit simplifies evaluation of the MAX3952. The EV kit operates from a +3.3V single supply and includes all the external components necessary to interface with LVDS, CML, and LVPECL inputs/outputs of the MAX3952. The LVPECL inputs (REFCLK) are externally terminated with 100 resistors. The LVDS inputs (PDI, PCLKI) are internally terminated with 100 differential input resistance and therefore do not require external termination. Ensure that LVDS devices driving these inputs are not redundantly terminated. The CML outputs (SDO, SCLKO) are optimized to drive a 50 load. PCLKO, SDO, SCLKO, and REFCLK are AC-coupled with 0.1F capacitors. The LVDS data and clock inputs are DC-coupled, but the lines can be cut and pads are available to allow the placement of AC-coupling capacitors. (See Figure 2) Setting Static inputs with jumpers To set static levels on the parallel data inputs, refer to Figures 1 and 2. For example, to place a static "1" on PDI0, the inverted input must be connected to GND, and the non-inverted connected to VCC. Driving AC-Coupled Signals for PDI_ 1) 2) 3) Follow the quick start on page 2. Ensure that no shunt is installed at JU10. Cut the removable traces for all of the PDI_ and PCLKI inputs and install 0.1F capacitors. (See Figure 2) Place shunts at JU39 and JU40. For all PDI_ inputs, place a shunt in the 2.0k to CMV position. (See Figure 2) Place 1.2V ( the common mode voltage) at J21 and ground at J26. 4) 5) 6) SMB Connector Recommendations for Interconnect Between the MAX3952EV Kit and an Oscilloscope: Removeable Trace Metal Pad VCC 2.0k to CMV 2.0k to CMV Use a high-bandwidth sampling oscilloscope. Maxim recommends the Tektronix CSA8000 mainframe with an 80E01 50GHz sampling head. The 80E03 and 80E04 20GHz sampling heads are not recommended. The total path length from the EV kit to the oscilloscope should to be minimized. If cables must be used, 0.141in semi-rigid 50 coaxial cable with high quality SMA connectors are recommended. Example: Tektronix part # 015-1015-00 Exposed Pad Package The exposed pad (EP) 68-pin QFN incorporates features that provide a very low thermal resistance path for heat removal from the IC, either to a PC board or to an external heat sink. The MAX3952's EP must be soldered directly to a ground plane with good thermal conductance. GND GND 50 Transmission Lines PDIPDI+ M A X 3 9 52 THIS SYMBOL REPRESENTS A JUMPER PIN Figure 1. Detail of PDI Inputs ________________________________________________________________________________________ 3 MAX3952 Evaluation Kit Evaluates: MAX3952 0.1 F Cap PDI+ PDI- PDI+ PDI- PDI+ PDI- PDI+ PDI- Jumper settings for driving PDI+/externally ( DC-coupled) Figure 2. PDI Jumper Settings Jumper settings for PDI+/- = logic 1 Jumper settings for PDI+/- = logic 0 Jumper settings for driving PDI+/externally ( AC-coupled) 4 ________________________________________________________________________________________ MAX3952 Evaluation Kit NOTE - ALL RESISTANCE VALUES IN OHMS Evaluates: MAX3952 Figure 3. MAX3952 EV Kit Schematic ________________________________________________________________________________________ 5 MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 4. MAX3952 EV Kit Placement Guide-Component Side 6 ________________________________________________________________________________________ MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 5. MAX3952 EV Kit Component Placement Guide-Solder Side ________________________________________________________________________________________ 7 MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 6. MAX3952 EV Kit PC Board Layout-Solder Side 8 ________________________________________________________________________________________ MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 7. MAX3952 EV Kit PC Board Layout-Component Side ________________________________________________________________________________________ 9 MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 8. MAX3952 EV Kit PC Board Layout-Ground Plane 10 ________________________________________________________________________________________ MAX3952 Evaluation Kit Evaluates: MAX3952 Figure 9. MAX3952 EV Kit PC Board Layout-Power Plane Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit 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 ______________________11 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products |
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