NB3L202KMNGEVB NB3L202K Evaluation Board User's Manual www.onsemi.com Introduction EVAL BOARD USER’S MANUAL The NB3L202K is a differential 1:2 HCSL Clock Fanout Buffer. Inputs can directly accept differential LVPECL, LVDS and HCSL signals. This evaluation board was designed to provide a flexible and convenient platform to quickly evaluate and characterize the operation of the NB3L202K. This manual should be used in conjunction with the device datasheet which contains full technical details on the device specifications and operation. • • • • This evaluation board manual contains: Information on the NB3L202K Evaluation Board Block Diagram and Board Schematic Test and Measurement Setup Procedures Bill of Materials Top View Bottom View Figure 1. NB3L202K Evaluation Board © Semiconductor Components Industries, LLC, 2016 April, 2016 − Rev. 0 1 Publication Order Number: EVBUM2398/D NB3L202KMNGEVB Power Supply VEE/ VCC DUTGND Signal Generator Test Measuring Equipment VEE/ DUTGND VCC Out CLK_IN DIF_n DUT CLK_IN# Out DIF_n# ExPad Channel 1 GND Channel 2 SMAGND VEE/ DUTGND 50 W 50 W GND GND (0 V) Power Supply Figure 2. Basic Lab Setup Equipment Required • DC Power Supply • Oscilloscope • Signal Generator • 50-W Cables HCSL Output Loading/Termination HCSL outputs are typically loaded and terminated with a series resistor (RSeries) = 33-W and 50-W to ground. This can be easily accomplished by connecting the HCSL outputs to the 50-W internal impedance in the oscilloscope. There are RSeries 33-W termination resistors installed for each HCSL output. Power Supplies and Ground On the top side of the evaluation board, there are four test points electrically connected to: • TP1 = VCC • TP2 = DUTGND • TP3 = Exposed Pad • TP4 = SMAGND = 0 V Output Enables − OE# The OE# pins default Low when left open and will enable the outputs. To disable the outputs, connect the OE# pin to VDD. CLK_IN & CLK_IN# The CLK_IN and CLK_IN# inputs can be driven by a signal generator through the SMA connectors provided. To terminate the signal generator, 50-W resistors to GND are installed on the board. TP1 is connected to VDD and VDDO. TP2, TP3 and TP4 are connected to GND. Table 1. NB3L202K, HCSL OUTPUTS POWER SUPPLY CONFIGURATION Device Pin Power Supply Connector Power Supply VDD VCC = +3.3 V DUTGND & SMAGND 0V Quick Start Lab Set-Up User’s Guide Test and Measurement Procedures 1. Connect TP1 (VCC) to the positive power supply. 2. Connect TP2 (DUTGND), TP3 (Exposed Pad) or TP4 (SMAGND) to GND power supply; they are all connected together. 3. Connect the outputs of the signal generator to the CLK_IN and CLK_IN# inputs with 50-W cables. There are 50-W resistors installed and connected to GND to terminate the outputs of the signal generator. 4. Connect the DIF_n and DIF_n# outputs to the appropriate 50-W oscilloscope head/channel. The board does not have 50-W output termination, thus use of the 50-W scope head is required. As an option, 50-W resistors can be carefully installed on each output on the board, and then use of a high impedance probe is required to measure outputs. Single Power Supply Connections Single Power Supply +3.3 V + VCC 0V − DUTGND Figure 3. Single Power Supply Configuration www.onsemi.com 2 NB3L202KMNGEVB GND CLK_IN VDD_O GND 15 VDD 0.1 mF DIF_0 16 DIF_0# GND_O GND 33 W 33 W Power-Up Sequence 1. Turn on DUT power supply. 2. Setup the signal generator output levels and frequency for the CLK_IN & CLK_IN# inputs. For differential HCSL inputs, VIL = 0 V and VIH = 700 mV. 3. Monitor DIF_n & DIF_n# outputs on the oscilloscope. 14 GND Exposed Pad 13 GND 1 12 2 11 NB3L202K TP OE1# TP OE0# CLK_IN# VDD 4 9 475 W GND GND 0.1 mF GND 5 6 7 8 VDD 33 W GND VDD_O DIF_1 DIF_1# GND_O GND 33 W GND 10 IREF 50 W 50 W 3 0.1 mF VDD Figure 4. NB3L202KGEVB Schematic www.onsemi.com 3 GND NB3L202KMNGEVB Top View Figure 5. NB3L202KGEVB On-board Resistor Locations Polarity of 10 mF + C2 − VCC SMAGND 0.1 475 10 mF 14 15 16 12 1 11 2 50 10 3 50 9 4 0.1 8 7 6 SMAGND 13 5 0.1 Bottom View Figure 6. Configuration for NB3L202K www.onsemi.com 4 NB3L202KMNGEVB Table 2. BILL OF MATERIALS Components Qty. Description Manufacturer Part Number SMA Connector 6 SMA Connector, Side Launch, Gold Plated Johnson 142−0701−801 Surface Mount Test Points 4 SMT Miniature Test Point Keystone* 5015 Chip Capacitor 3 0.1 mF ±10% 0603 AVX Corporation* 0402ZD104KAT2A Digi-Key 478−1129−1−ND Chip Capacitor 1 10 mF ±10% AVX Corporation* Chip Resistor 2 50-W ±1% 0603 Precision Thick Film Chip Resistor Vishay Chip Resistor 4 33-W 0402 Chip Resistor Panasonic Chip Resistor 1 475-W 0402 Precision Thick Film Chip Resistor Vishay Evaluation Board 1 QFN 16 Evaluation Board ON Semiconductor ECLQFN16EVB Device Under Test 1 DUT ON Semiconductor NB3L202KMNG FC0603−50BFTR−ND *Components are available through most distributors, i.e. www.newark.com, www.digikey.com. ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. 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