Evaluation Board User Guide UG-067 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Setting Up the Evaluation Board for the ADCLK950 PACKAGE LIST The data sheet contains full technical details about the specifications and operation of this device. Evaluation board with ADCLK950 component installed Applicable documents (schematic, layout) GENERAL DESCRIPTION This user guide describes how to set up and use the evaluation board for the ADCLK950. The ADCLK950 data sheet should be used in conjunction with this user guide. The ADCLK950 is a very high performance clock fanout buffer. The evaluation board is fabricated using a high quality Rogers dielectric material. Transmission line paths are kept as close to 50 Ω as possible. 08666-101 DIGITAL PICTURE OF EVALUATION BOARD Figure 1. ADCLK950 Evaluation Board Please see the last page for an important warning and disclaimers. Rev. 0 | Page 1 of 8 UG-067 Evaluation Board User Guide TABLE OF CONTENTS Package List ....................................................................................... 1 Recommended Board Setup ........................................................3 General Description ......................................................................... 1 Clock Outputs ................................................................................4 Digital Picture of Evaluation Board ............................................... 1 Evaluation Board Schematic and Artwork.....................................5 Revision History ............................................................................... 2 ESD Caution...................................................................................8 Evaluation Board Hardware ............................................................ 3 REVISION HISTORY 11/09—Revision 0: Initial Version Rev. 0 | Page 2 of 8 Evaluation Board User Guide UG-067 EVALUATION BOARD HARDWARE VREF1 and VT1 together. This connection is made with R14 installed at the factory. RECOMMENDED BOARD SETUP The recommended setup for the ADCLK950 evaluation board is shown in Figure 2. VCC is set to 3.3 V and VEE is set to GND. The CLKSEL jumper (P2) is provided to select the desired input configuration. The range of the peak-to-peak input voltage swing at CLK1 is 0.2 V p-p to 1.7 V p-p. Note that output jitter performance is degraded by an input slew rate, as shown in the data sheet. On the evaluation board, Input CLK0 and Input CLK0 are set up for dc-coupled operation to the ADCLK950 via J2 and J4. This input configuration requires the user to provide the appropriate ac swing and common-mode voltage to both inputs. Refer to the ADCLK950 data sheet for input specifications. Table 1. Basic Equipment Required Quantity 1 1 1 1 4 CLK1 is set up to evaluate with a single-ended source via the balun on the evaluation board. In addition, series capacitors in the path provide ac-coupled inputs to the ADCLK950. The common-mode voltage for both inputs is provided by tying Description Single power supply Signal source High bandwidth oscilloscope High bandwidth differential probe (optional) Matched high speed cables POWER SUPPLY +3.3V GND VCC VEE CH 1 CLK1 CLK1 Qx ADCLK950 EVALUATION BOARD OSCILLOSCOPE CLK0 Qx CH 2 CLK0 VREF 1 VT1 VREF 0 VT0 Figure 2. Recommended Setup for Device Evaluation Rev. 0 | Page 3 of 8 08666-002 CLOCK SOURCE GND UG-067 Evaluation Board User Guide CLOCK OUTPUTS Table 2. Power Connections via P1 The ADCLK950 has 10 differential outputs. The five even-ordered differential clock outputs on the evaluation board are biased to GND via 200 Ω and ac-coupled to the SMAs. From the SMAs, use matched 50 Ω coaxial cables into the oscilloscope for evaluation. The five odd-ordered differential outputs on the evaluation board are not launched. Use a high bandwidth differential probe and oscilloscope close to the ADCLK950 device for evaluation. See the evaluation board schematic in Figure 4 for more details. Label GND VCC VEE ADCLK950 Connect to GND Connect to 3.3 V Connect to GND LVPECL ADCLK950 Q0 Q0 Q1 Q1 Q2 Q2 Q3 VREF 0 REFERENCE Q3 Q4 VT0 Q4 CLK0 CLK0 Q5 VT1 Q5 CLK1 Q6 CLK1 Q6 Q7 IN_SEL VREF 1 Q7 REFERENCE Q8 Q8 Q9 Figure 3. ADCLK950 1:10 Clock/Data Buffer Block Diagram Rev. 0 | Page 4 of 8 08666-001 Q9 GND GND GND CLK0 J3 J2 CLK0B J1 GND 100 OHMS => DIFFERENTIAL 50 OHMS => SINGLE ENDED 142-0761-861 CLK1B 142-0761-861 CLK1 142-0761-861 CLK0B 142-0761-861 CLK0 J4 0 GND R07 0 R09 DNI 2 142-0761-861 142-0761-861 1 J6 J5 3 4 MABA-007159-000000 GND OUT8B GND GND OUT8 1 T2 SEC 2 5 0 PRI 1 DNI R08 50 OHMS 50 OHMS 142-0761-861 J7 2 .1UF C2 R11 GND C3 2 1 2 .1UF C4 .1UF 1 GND 2 2 .1UF 1 .1UF 1 CLK1B CLK1 OUT8 OUT8B C04 C03 LABEL "VEE (CLK0)" CLKSEL LABEL "VCC (CLK1)" VEE 2 VEE R8 VEE 1 100 OUT9 1 1 50 OHMS R9 100 VEE 1 1 VEE 100 VEE 2 1 OUT3 R16 VEE VCC 1 1 GND GND_03 OUT3B 50 OHMS OUT2B 2 VEE VEE VEE 1 100 R15 VEE 2 1 OUT7 1 OUT7B VEE VEE GND_07 GND 1 1 R17 2 50 OHMS 50 OHMS VCC Q0 VCC Q1 Q3 Q2 CLK_SEL Q0B Q1B Q2B Q3B VCC30 VCC NC 29 CLK0 NC 28 R39 200 VEE C27 .1UF CLK0B Q4 27 VREF0 Q4B 26 100 OHMS ADCLK950 VT0 Q5 25 CLK1 CP-40-8 R40 200 VEE C28 .1UF CLK1B Q5B 24 VT1 NC 23 DNI DNI VREF1 NC 22 R41 200 VEE C29 .1UF VEE VCC 21 Q9B Q8B Q7B Q6B VCC Q9 Q8 Q7 Q6 VCC 100 OHMS VCC VCC VEE C30 .1UF VCC R42 200 DNI DNI 1 2 3 VREF0 4 5 VT0 6 7 8 VT1 VREF1 9 VEE 10 U1 VEE VCC 1 OUT1B VEE VEE R5 R6 R1 R2 OUT9B VEE VCC 1 OUT1 OUT0 1 GND 50 OHMS GND_09 GND 1 50 OHMS 50 OHMS 1 2 3 P2 GND_01 50 OHMS 200 200 200 200 VEE OUT2 OUT6B OUT6 DNI GND GND 2 N0_C02 N0_C03 .1UF C10 J10 1 2 J9 N0_C01 OUT4B OUT4 GND_04 C9 .1UF 1 DNI VEE .1UF C12 1 2 .1UF C11 1 2 VEE 50 OHMS 50 OHMS 50 OHMS 142-0761-861 142-0761-861 DNI GND OUT2B GND OUT2 GND OUT6B GND OUT6 VEE OUT5B OUT5 J12 142-0761-861 J11 142-0761-861 50 OHMS VEE R23 50 OHMS .1UF C18 1 2 .1UF C17 1 2 .1UF DNI C16 1 2 .1UF DNI C15 1 2 GND J16 142-0761-861 J15 142-0761-861 DNI J14 142-0761-861 OUT5B GND OUT5 GND GND DNI J13 142-0761-861 R43 R44 R45 VT0 VEE VCC VREF0 VT1 VREF1 VEE GND VEE BYPASS CAPACITORS VT0 VT1 GND BYPASS CAPACITORS (SUPPLY) VEE VCC BYPASS CAPACITORS (DUT) VEE R46 TP4 1 WHT VT0 R48 R47 ORDER WEILAND 25.600.5453.0 PLUG SAME AS ADCLK954 ENGR BRD STITCHING RESISTORS (O OHM) GND LABEL "VCC (3.3V)" LABEL "VEE (GND)" POWER P1 C31 C32 1 200 R7 Z5.531.3425.0 C34 C33 GND 49.9 .1UF 10UF OUT0B 100 VEE 2 .1UF 2 1 100 DNI R10 R12 .1UF C21 R32 200 R31 200 .1UF C19 R34 200 C23 .1UF R14 50 OHMS 100 OHMS R3 C20 .1UF 200 49.9 .1UF C26 R38 200 R21 R22 .1UF C22 100 OHMS 100 1 R18 2 2 200 200 .1UF 10UF J8C1 1 2 DNI R13 1 2 3 4 VCC GND 0 .1UF C25 R36 200 .1UF C24 200 C35 C5 C36 PAD 40 39 38 200 R33 37 36 100 OHMS 35 34 200 R35 33 200 R37 32 31 100 OHMS R20 11 12 13 14 15 16 17 18 19 20 R4 Figure 4. ADCLK950 Evaluation Board Schematic 200 1 200 1 R19 1 200 Rev. 0 | Page 5 of 8 R24 1 200 C39 OUT0B .1UF C38 0 1 .1UF C37 10UF 0 0 0 1 .1UF TP5 1 WHT VT1 .1UF C41 VREF0 .1UF C40 .1UF C42 0 1 VREF1 .1UF .1UF 0 1 08666-004 0 142-0761-861 Evaluation Board User Guide UG-067 EVALUATION BOARD SCHEMATIC AND ARTWORK Evaluation Board User Guide 08666-005 UG-067 08666-006 Figure 5. Top Trace Layer Figure 6. Ground Plane Layer Rev. 0 | Page 6 of 8 UG-067 08666-007 Evaluation Board User Guide 08666-008 Figure 7. VCC and VEE Power Plane Layer Figure 8. Bottom Trace Layer Rev. 0 | Page 7 of 8 UG-067 Evaluation Board User Guide NOTES ESD CAUTION Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems. ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG08666-0-11/09(0) Rev. 0 | Page 8 of 8