19-2481; Rev 0; 6/02 MAX3952 Evaluation Kit _______________ General Description ♦ +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 QTY 19 DESCRIPTION DESIGNATION QTY 0.1µF ±10% ceramic capacitors (0402) J9–J20, J22–J25, J29–J48 36 JU10, JU36, JU39, JU40 4 34 DO NOT INSTALL C9, C22 2 10µF tantalum capacitors ±10% AVX TAJB106K010 R3–R6 4 DO NOT INSTALL R12–R17, R19, R22, R23, R27, R54, R56 12 0Ω resistors (0402) R7, R43 2 768Ω ±1% resistors (0402) R2, R57 2 30kΩ ±5% resistors (0402) R8–R11, R18, R20, R21, R24, R25, R26, R28–R42, R44–R52 34 2kΩ ±1% resistors (0402) R53, R55 2 25.5kΩ ±1% resistors (0402) R1 1 100Ω ±5% resistor (0201) L1, L2, L3 3 D1, D2 2 J1–J6, J27, J28 8 56 nH inductors Coilcraft0603CS-56NXJBW Red LEDs SMA connectors, edgemount, tab centers EFJohnson 1420701-851 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 34 34 DESCRIPTION SMB connectors EFJohnson 131-1701-201 1×2 pin headers, 0.1” centers 1×3 pin headers, 0.1” centers 1×1 pin headers, 0.1” centers 31 shunts Digi-Key S9000-ND U1 1 MAX3952EGK 68-pin QFN U2 1 MAX4429ESA 8-pin SO J7, J8, J21, J26 4 Test points Digi-Key 5000K-ND – 1 MAX3952 evaluation kit – 1 MAX3952 data sheet ______________ Ordering Information PART MAX3952EVKIT TEMP RANGE -40°C to +85°C IC PACKAGE 68 QFN-EP _________________________________________________________________Maxim Integrated Products 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. 1 Evaluates: MAX3952 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 MAX3952 Evaluation Kit _______________________________________________________________Quick Start Evaluates: MAX3952 1) 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, 50Ω 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 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 MAX3952 when ordering from these suppliers _____________Adjustment and Control Descriptions (see Quick Start first) COMPONENT NAME FUNCTION JU1 SCLKEN Connect to VCC to enable serial clock. JU56 PRBSEN 7 Enables the internal 2 - 1 PRBS generator. Connect to VCC to enable, to GND to disable. Open ⇒ 622 MHz VCC ⇒ 644MHz GND ⇒ 155MHz 30kΩ to GND ⇒161MHz See Figure 4, or refer to in Table 1 in the MAX3952 data sheet JU38 CKSET JU36 FIFO_ERROR Shunt to Connect FIFO_ERROR to FIFO_RESET. JU13 FIFO_RESET Connecting FIFO_RESET to VCC resets the FIFO. Placing a shunt at JU36 and leaving JU13 open is recommended for normal operation. JU10 Common-Mode Voltage (CMV) Place a shunt at JU10 for normal operation. This connects the CMV to GND through 25.5kΩ. JU39, JU40 Connect PCLKI± to CMV Connects the PCLKI± inputs to the CMV through 2.0kΩ. Leave open for normal operation. Jumpers on PDI_± Inputs Allows for Static Inputs 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. 2 ________________________________________________________________________________________ MAX3952 Evaluation Kit Evaluates: MAX3952 ______________ Detailed Description 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 100Ω resistors. The LVDS inputs (PDI±, PCLKI±) are internally terminated with 100Ω 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 50Ω load. PCLKO±, SDO±, SCLKO±, and REFCLK± are AC-coupled with 0.1µF 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) SMB Connector Driving AC-Coupled Signals for PDI_± 1) Follow the quick start on page 2. 2) Ensure that no shunt is installed at JU10. 3) Cut the removable traces for all of the PDI_± and PCLKI± inputs and install 0.1µF capacitors. (See Figure 2) 4) Place shunts at JU39 and JU40. 5) For all PDI_± inputs, place a shunt in the 2.0kΩ to CMV position. (See Figure 2) 6) Place 1.2V ( the common mode voltage) at J21 and ground at J26. Recommendations for Interconnect Between the MAX3952EV Kit and an Oscilloscope: Removeable Trace Metal Pad VCC 2.0kΩ to CMV 2.0kΩ to CMV GND GND 50Ω Transmission Lines PDI- 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. PDI+ M A X 3 9 52 THIS SYMBOL REPRESENTS A JUMPER PIN Figure 1. Detail of PDI± Inputs 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 50Ω 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. ________________________________________________________________________________________ 3 Evaluates: MAX3952 MAX3952 Evaluation Kit 0.1 µ F Cap PDI+ PDI- Jumper settings for driving PDI+/externally ( DC-coupled) PDI+ PDI- Jumper settings for PDI+/- = logic 1 PDI+ PDI- Jumper settings for PDI+/- = logic 0 PDI+ PDI- Jumper settings for driving PDI+/externally ( AC-coupled) Figure 2. PDI± Jumper Settings 4 ________________________________________________________________________________________ Evaluates: MAX3952 NOTE – ALL RESISTANCE VALUES IN OHMS MAX3952 Evaluation Kit Figure 3. MAX3952 EV Kit Schematic ________________________________________________________________________________________ 5 Evaluates: MAX3952 MAX3952 Evaluation Kit 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 Evaluates: MAX3952 MAX3952 Evaluation Kit 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 Evaluates: MAX3952 MAX3952 Evaluation Kit 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