NB3N3011DTEVB

NB3N3011DTEVB NB3N3011DTEVB Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL Board Description Board Layout The NB3N3011 Evaluation Board provides a flexible and convenient platform to quickly evaluate, characterize and verify the performance and operation of the NB3N3011 Clock Generator. This user’s manual provides detailed information on board contents, layout and its use. It should be used in conjunction with a device datasheet: NB3N3011. (www.onsemi.com) A single TSSOP−8 (wide) device can be mounted on the board. The evaluation board is constructed with FR4 material and is designed to minimize noise, and crosstalk and achieve high bandwidth. SMA connectors are provided for output signal access. Layer Stack L1 Signal and SMAGND L2 SMA Ground L3 VCC (Positive Power Supply) and VEE (Device Negative Power Supply) L4 Signal Board Features • Accommodates the Electrical Characterization of the • • • • • NB3N3011 Supports Use of a 25 MHz and 26.5625 MHz Through−hole or Surface Mount Crystal Incorporates on Board Power Supply Filter Convenient and Compact Board Layout 3.3 V Single or Split−power Supply Operation LVPECL Differential Output Signals are Accessed via SMA Connectors Figure 1. Evaluation Board © Semiconductor Components Industries, LLC, 2012 February, 2012 − Rev. 2 1 Publication Order Number: EVBUM2062/D NB3N3011DTEVB LAB SETUP PROCEDURE Power Supply Connections and Output Termination Dual Power Supplies The NB3N3011 has a positive supply pin, VCC, and a negative supply pin, VEE. SMAGND (VTT) is the termination supply for the LVPECL outputs, only. Power supply banana plug connectors for VCC, VEE and SMAGND are provided in the corners of the board. The LVPECL Q and Q outputs have standard, open emitter outputs and must be externally DC loaded and terminated. Thevenin equivalent load and termination resistors pads are provided at the Q/Q output’s SMA connectors, but are not installed. A “split” or dual power supply technique can be used to take advantage of terminating the LVPECL outputs into 50 W of an oscilloscope or a frequency counter. Since VTT = VCC – 2.0 V, offsetting VCC to +2.0 V yields VTT = 0 V or Ground. The VTT terminal connects to the isolated SMAGND connector ground plane, and is not to be confused with the device ground pin or VEE. +2.0 V + VCC +1.3 V − + − VEE VTT +3.3 V Figure 2. “Split” or Dual Power Supply Connections Table 1. “SPLIT” POWER SUPPLY CONFIGURATION Device Pin Power Supply “Spilt” Power Supply VCC RED VCC = +2.0 V SMAGND BLACK VTT = VCC – 2.0 V = 0 V VEE BLACK VEE = −1.3 V SMAGND = 0 V (VTT) VDD = +2.0 V Digital Oscilloscope or Frequency Counter Q 50 W Q VEE = −1.3 V Figure 3. “Split” Power Supply Connections http://onsemi.com 2 Trigger 50 W NB3N3011DTEVB LAB SETUP AND MEASUREMENT PROCEDURE Equipment Used NB3N3011 Evaluation Board Pin Descriptions and Features by Pin • • • • Tektronix TDS8000 Oscilloscope or Frequency Counter Agilent #6624A DC Power Supply Digital Voltmeter Matched high−speed cables with SMA connectors In order to get started and demonstrate the NB3N3011, perform the following test set−up sequence: To monitor the Q and Q outputs on an oscilloscope or frequency counter (with internal 50 W termination impedance), the power supply needs to be DC offset: 1. Connect a “split” power supply to the evaluation board. (see Figure 2) Connect VCC banana jack to +2.0 V Connect SMAGND banana jack to ground = 0 V Connect VEE banana jack to −1.3 V for 3.3 V operation 2. Ensure the oscilloscope is triggered properly and has 50 W internal termination to ground. The board does not provide 50 W source termination resistors. Two oscilloscope trigger methods are1) from Q (using a “T” connector) or 2) directly from Q. 3. Connect the LVPECL Q and Q outputs to the oscilloscope with good quality matched cables. The outputs are terminated with 50 W to VTT = SMAGND (VCC – 2.0 V) = 0 V = Ground internal to the oscilloscope. The NB3N3011 Evaluation Board was designed to accommodate the test and evaluation of the NB3N3011 LVPECL Clock Generator. Detailed board features by device pin are described below: Crystal (XTAL_IN and XTAL_OUT) A through−hole or surface mount parallel resonant crystal can be used. Disregard the metal traces and connectors from XIN and XOUT. They are open and NOT connected to the crystal package pins and have no impedance affect on the crystal. Q and Q The Q and Q LVPECL outputs have equal length 50 W board traces with SMA connectors. Matched cables can connect to an oscilloscope or frequency counter. VCC and VCCA The VCC pin is connected directly to the VCC power plane. By−pass capacitors are installed. The VCCA pin has the power supply filter components installed per the datasheet. http://onsemi.com 3 NB3N3011DTEVB Table 2. NB3N3011 BILL OF MATERIALS Qty Designator Connector Component Johnson Comp Inc SMA #142−0711−821 Description 2 Q, Q Capacitor, P/S Bypass 22 mF 2 C5, C9 Capacitor, P/S Bypass; VCCA Filter 0.01 mF 4 C7, C12 Capacitor, P/S Bypass 0.1 mF 2 C8, C8 Capacitor, VCCA Filter 10 mF 1 C10 Capacitor, Cyrstal Load 33 mF 1 C14 Capacitor, Cyrstal Load 22 mF 1 C13 Crystal 25 MHz, Ecliptek 1 Y1 #ECX6106−25.00M − Surface Mount #ECX6150−25.000M − Through−hole 26.5625 MHz, Ecliptek #ECX6110−26.5625M − Surface Mount #ECX6151−26.5625M − Through−hole Jumper Header 0 Jumper 0 Resistor, VCCA Filter 10 W 1 R1 Banana Jack Deltron #EF681 150−039 Red 1 VCC Banana Jack Deltron #EF681 150−040 Black 2 VEE, SMAGND Stand−offs 4 NB3N3011 TSSOP−8 (Wide) device mounted on board 1 TSSOP−8 (Wide) Socket M&M Specialties #50−000−00659 (Optional) (480)−858−0393 Optional http://onsemi.com 4 NB3N3011DTEVB http://onsemi.com 5 NB3N3011DTEVB 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. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 http://onsemi.com 6 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative EVBUM2062/D