NB7N017MEVB NB7N017M Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL Description This evaluation board manual contains: • Information on NB7N017MEVB Evaluation Board • Appropriate Lab Test Setup • Bill of Materials This document describes the NB7N017M evaluation board and the appropriate lab test setups. It should be used in conjunction with the NB7N017M data sheet which contains full technical details on the device specification and operation. This evaluation board is offered as a convenience for the customers interested in performing their own engineering characterization and performance assessment of the NB7N017M. The board provides a high bandwidth 50 W controlled impedance environment. The evaluation board is designed to facilitate a quick evaluation of the NB7N017M GigaComm™ 8−bit dual modulus programmable divider/prescaler. The current mode logic (CML) output ensures minimal noise and fast switching edges. What measurements can you expect to make? With this evaluation board, the following measurements could be performed in single–ended or differential modes of operation: • Jitter • Frequency Response • Output Rise and Fall Time Figure 1. Evaluation Board Photo © Semiconductor Components Industries, LLC, 2012 March, 2012 − Rev. 2 1 Publication Order Number: EVBUM2088/D NB7N017MEVB Board Lay−Up Board Layout The NB7N017MEVB evaluation board is implemented in four layers (Figure 2, Evaluation Board Lay−up). The first layer or primary trace layer is 5 mil thick Rogers RO4003 material, which is designed to have equal electrical length on all signal traces from the device under the test (DUT) to the sense output. The second layer is the 1.0 oz copper ground plane. The FR4 dielectric material is placed between second and third layer and between third and fourth layer. The third layer is also 1.0 oz copper power plane. The fourth layer is the secondary trace layer. The NB7N017MEVB evaluation board was designed to be versatile (see evaluation board schematic Figure 5). The input and output signal trace layout of the evaluation board is shown in Figure 3. The high−speed input and output pins are on a controlled 50 W impedance trace to an SMA connector. Other control pins (Pa[0:7] and Pb[0:7]) are connected to a switch for ease of programmability. The master RESET can either be controlled by a switch (SW6) or an input signal (J10). ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉ Component Side 30040R GND 0.062 $00.4 FR4 VCC FR4 Bottom Side Figure 2. Evaluation Board Lay−Up (Bottom View) (Top View) Figure 3. Evaluation Board http://onsemi.com 2 NB7N017MEVB Power Supplies Termination The NB7N017M is powered by |VCC − VEE| = 3.3 V power supplies. For straightforward lab setup operation, negative voltages is recommended to enable the 50 W internal impedance of the oscilloscope to be used as a termination for the CML signals (VCC = 0.0 V, VEE = −3.3 V and GND = 0.0 V). It is recommended to add capacitors (C4 and C8 are 22 mF and C1, C2, C3, C5, C6, and C7 are 0.1 mF) to reduce the unwanted noise from the power supplies. Adding capacitors can improve the edge rates, reduce over shoot, and under shoot. Evaluation board provides several capacitor pads to add capacitors. CML outputs need to be terminated to VCC via a 50 W resistor. The input pins contain internal 50 W resistors (VT pins). The VT pins are tied to VCC which limits the input configuration of this device on this evaluation board. NOTE: The test measurement device must contain 50 W termination. 1. Connect appropriate power supplies. (VCC = 0.0 V, VEE = −3.3 V, and GND = 0.0 V). 2. Connect input signals to the appropriate SMA connectors. Configure input signals according to the device data sheet. 3. Connect a test measurement device on the device output SMA connectors. Power Supply VCC GND VEE Test Measuring Equipment CML CE Input CML TC Output CML CLK Input NB7N017M CML SEL Input Dip Switch for Pa[0:8] and Pb[0:8] Figure 4. Typical Lab Setup http://onsemi.com 3 Channel 1 Channel 2 NB7N017MEVB VCC P1 C1 J1 J2 J3 J4 J6 C2 C3 VEE P2 J7 C4 C5 C6 C7 C8 J5 P3 Symbol is SMA GND 52 40 VTSEL* SEL* VCC 1 SW1−1 SW2−1 VEE SW2−2 VEE SW2−3 VEE SEL VTSEL VTCLK* CLK* CLK VTCLK VBB VTCE* CE* CE VTCE VCC VEE PLa PLb Pa0 Pb0 Pa1 Pb1 Pa2 Pb2 VCC SW2−4 VEE 39 SW1−2 SW4−1 VEE SW4−2 VEE SW4−3 VEE VCC NB7N017M QFN−52 Case 485M Pa3 VEE SW4−4 VEE Pb3 VEE SW3−1 VEE SW3−2 VEE SW3−3 VEE SW3−4 VEE Pa4 Pb4 Pa5 Pb5 Pa6 Pb6 Flag of Package Pa7 13 SW5−1 VEE SW5−2 VEE SW5−3 VEE SW5−4 VEE Pb7 NC 27 NC Pa8 VEE MR VCC NC NC VCC TC* TC VCC NC VEE 14 Pb8 26 SW6 VEE VCC VCC J10 J9 J8 Figure 5. Evaluation Board Schematic http://onsemi.com 4 NB7N017MEVB Table 1. BILL OF MATERIALS FOR NB7N017MEVB Components Manufacturer Description Part Number SMA Connector Johnson SMA Connector, Side Launch, Gold Plated 142−0701−801 Chip Capacitor Kemet* 0603 0.1 mF ± 10% C0603C104K4RAC 22 mF ± 10% T491C226K016AS Web Site www.newark.com Banana Jack SPC* Banana Jack Female 813 www.newark.com Evaluation Board ON Semiconductor NB7N017M Evaluation Board NB7N017MEVB http://www.onsemi.com Device Samples ON Semiconductor 3.3 V 8−bit Divider/Prescaler with CML Output NB7N017M http://www.onsemi.com Switch Grayhill Dip Switch, 1 Position 765B04 Switch Grayhill Momentary Switch 95C04A3GW *Components are available through most distributors, i.e. www.newark.com, www.digikey.com GigaComm is a trademark of Semiconductor Components Industries, LLC (SCILLC). ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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