19-4474; Rev 0; 2/09 EVALUATION KIT AVAILABLE MAX3673 Evaluation Kit The MAX3673 evaluation kit (EV kit) is a fully assembled and tested demonstration board that simplifies evaluation of the MAX3673 low-jitter frequency synthesizer with selectable input reference. The EV kit includes slide switches to allow easy selection of different modes of operation. Clock I/Os have SMA connectors and are AC-coupled to simplify connection to test equipment. The EV kit is powered by a +3.3V supply and uses LEDs for signal status indicators. Features ♦ Fully Assembled and Tested ♦ Slide Switches for Mode Control ♦ SMA Connectors and AC-Coupled Clock I/Os ♦ Powered by +3.3V Supply ♦ LED Signal Status Indicators Ordering Information PART TYPE MAX3673EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY C1, C6, C7 C11–C13, C16, C18–C22, C24–C27, C29, C30, C32–C39, C41, C42, C46–C50, C62, C63 C2 35 1 DESCRIPTION 0.1μF ±10% ceramic capacitors (0402) 33μF ±5% tantalum capacitor (B case) DESIGNATION QTY DESCRIPTION R1–R5, R15, R16, R17, R37–R46 18 150 ±1% resistors (0402) R6–R11 6 49.9 ±1% resistors (0402) R12, R13, R14, R18, R21, R22 6 332 ±1% resistors (0603) R23, R24, R25 3 10k ±1% resistors (0603) S1 1 Switch, momentary, SPST-NO Panasonic EVQQ2S02W C3 1 2.2μF ±10% ceramic capacitor (0805) C4 1 0.1μF ±10% ceramic capacitor (0603) S2, S3, S5 3 Switches, slide, SPDT Copal Electronics CUS-12TB C5 1 0.01μF ±10% ceramic capacitor (0603) S6, S7, S8 3 C28 1 0.22μF ±10% ceramic capacitor (0402) Switches, slide, SP4T Copal Electronics CUS-14TB S9, S10 2 D1, D3, D8 3 Green SMD LEDs (1206) Panasonic LNJ311G8PRA Switches, slide, SP3T Copal Electronics CUS-13TB TP3, TP20 2 Test points Keystone 5000 U1, U2, U4 3 Dual inverters (6 SC-70) TI SN74LVC2G14DCKR U7 1 Low-jitter, frequency synthesizer with selectable input reference (56 TQFN) Maxim MAX3673ETN+ Microsemi MAX3673ETN+ None 1 PCB: MAX3673 EV Kit+ Circuit Board, Rev A D2, D4, D7 3 Red SMD LEDs (1206) Panasonic LNJ211R8ARA J1, J2, J5–J12, J14, J15, J19, J20, J22–J29, J44, J45 24 J4, J13 2 Test points Keystone 5000 L1 1 4.7μH ±20% inductor Taiyo Yuden CBC3225T4R7M SMA connectors, edge-mount, tab center Johnson 142-0701-851 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX3673 General Description Evaluates: MAX3673 MAX3673 Evaluation Kit Quick Start 1) Set the slide switches to the following settings: PLL_BYPASS = NORMAL SEL_CLK = REFCLK0 DM = 61.44M DA = 122.88M DB = 122.88M OUTA_EN = A0, A1 OUTB_EN = B0 Detailed Description The MAX3673 EV kit simplifies evaluation by providing the hardware needed to evaluate all the MAX3673 functions. Table 1 contains functional descriptions for the switches and indicators. Clock Inputs FB_SEL = INTERNAL 2) Connect a +3.3V supply to VCC (J13) and GND (J4). Set the supply current limit to 450mA. 3) Using SMA cables, connect a low-jitter 61.44MHz differential clock source to the REFCLK0 input. Verify that the green LEDs switch on for IN0FAIL and LOCK. 4) Using SMA cables, connect the OUTA0 output to test equipment. Terminate all unused enabled outputs (OUTB0 and OUTA1). The clock inputs (REFCLK0, REFCLK1, FB_IN) are ACcoupled at the SMA connectors and have on-board 100Ω differential terminations. For optimal jitter performance it is critical to use a low-jitter, differential, square-wave clock source. If such a source is not available, the clock inputs can be driven with a singleended sinusoidal or square-wave clock source for functional testing. Clock Outputs The clock outputs (OUTA[3:0], OUTB[4:0]) have onboard DC-biasing and are AC-coupled at the SMA connectors to allow direct connection to 50Ω-terminated test equipment. Unused outputs should be disabled (using switches S9 and S10) or have 50Ω terminations placed on the SMA connectors. Table 1. Switch and Indicator Descriptions COMPONENT NAME FUNCTION S1 MASTER RESET S2 PLL_BYPASS S3 SEL_CLK S5 FB_SEL S6 DM Selects the frequency of the reference clock inputs. S7 DA Selects the frequency of the A-group clock outputs. S8 DB Selects the frequency of the B-group clock outputs. Momentary switch to reset internal dividers. Not required at power-up. If the output divider settings (DA, DB) are changed on the fly, a reset is required to phase align the outputs. Selects normal PLL operation or PLL bypass. Selects the reference clock input. Selects internal or external feedback for the PLL. If external is selected, connect any of the A-group or B-group outputs to the FB_IN input. If DA DB, a B-group output must be used. S9 OUTA_EN S10 OUTB_EN D1, D2 IN0FAIL REFCLK0 failure indicator (green = pass, red = fail). D3, D4 IN1FAIL REFCLK1 failure indicator (green = pass, red = fail). D7, D8 LOCK Selects which A-group outputs are enabled (see Note). Selects which B-group outputs are enabled (see Note). PLL lock indicator (green = PLL locked, red = PLL not locked). Note: Setting OUTA_EN = “—” and OUTB_EN = “B0” at the same time enables a factory test mode and is not a valid mode of operation. 2 _______________________________________________________________________________________ MAX3673 Evaluation Kit Evaluates: MAX3673 Figure 1. MAX3673 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX3673 MAX3673 Evaluation Kit Figure 2. MAX3673 EV Kit Component Placement Guide—Component Side 4 _______________________________________________________________________________________ MAX3673 Evaluation Kit Evaluates: MAX3673 Figure 3. MAX3673 EV Kit PCB Layout—Component Side _______________________________________________________________________________________ 5 Evaluates: MAX3673 MAX3673 Evaluation Kit Figure 4. MAX3673 EV Kit PCB Layout—Ground Plane 6 _______________________________________________________________________________________ MAX3673 Evaluation Kit Evaluates: MAX3673 Figure 5. MAX3673 EV Kit PCB Layout—Power Plane _______________________________________________________________________________________ 7 Evaluates: MAX3673 MAX3673 Evaluation Kit Figure 6. MAX3673 EV Kit PCB Layout—Solder Side 8 _______________________________________________________________________________________ MAX3673 Evaluation Kit Evaluates: MAX3673 Figure 7. MAX3673 EV Kit Component Placement Guide—Solder Side 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 _____________________ 9 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.9 Microsemi Corporation (NASDAQ: MSCC) offers a comprehensive portfolio of semiconductor solutions for: aerospace, defense and security; enterprise and communications; and industrial and alternative energy markets. Products include high-performance, high-reliability analog and RF devices, mixed signal and RF integrated circuits, customizable SoCs, FPGAs, and complete subsystems. Microsemi is headquartered in Aliso Viejo, Calif. Learn more at www.microsemi.com. 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