Evaluation Board User Guide UG-132 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 Differential Amplifier Evaluation Board for Single 16-lead 3 mm × 3 mm LFCSP Packages FEATURES GENERAL DESCRIPTION Flexible board layout The Analog Devices, Inc., differential driver evaluation board Accommodates the ADA492x-1 and ADA493x-1 makes it easy for designers to obtain quick performance results family of differential amplifiers for their particular differential driver application circuits. The Allows for various circuit configurations board layout is very flexible and allows for many circuit Enables quick breadboarding/prototyping configurations, including traditional four-resistor circuits, Edge-mounted circuit configuration circuits with two different feedback loops, circuits with input Easy connection to test equipment and other circuits and output transformers, filters, and many others. Most resistors RoHS compliant and capacitors use 0603 and 0508 packages. The evaluation board part number labeling does not contain any specific differential amplifier part number information because this is a universal evaluation board and can be used with any Analog Devices differential amplifier in a 16-lead, 3 mm × 3 mm LFCSP with a dedicated feedback pin. The board accommodates the ADA492x-1 and ADA493x-1 family of differential amplifiers. The data sheets for these devices should be consulted in conjunction with this evaluation board user guide. 08990-003 08990-003 Figure 1. Component Side (LFCSP) Figure 2. Circuit Side (LFCSP) PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 8

UG-132 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1  V Input ......................................................................................4  OCM General Description ......................................................................... 1  Common-Mode Voltage ...............................................................4  Revision History ............................................................................... 2  SMA Input/Output Connectors ..................................................4  Differential Driver Evaluation Board Schematic .......................... 3  Evaluation Board Layout ..................................................................5  Evaluation Board Hardware ............................................................ 4  Ordering Information .......................................................................6  Power Supplies .............................................................................. 4  Bill of Materials ..............................................................................6  Feedback Networks and Input/Output Terminations ............. 4  Related Links ......................................................................................6  REVISION HISTORY 10/10—Revision 0: Initial Version Rev. 0 | Page 2 of 8

Evaluation Board User Guide UG-132 DIFFERENTIAL DRIVER EVALUATION BOARD SCHEMATIC –VS C4* + C2* PD R12* J3 17 16 15 14 13 D S S S S PA –V –V –V –V R1/RG* E- J1 R5* 1 –FB PD 12 R9* R2/RF* 2 +IN –OUT 11 J4 R7* DUT1 3 –IN +OUT 10 J5 R8* R4/RF* R10* R3/RG* 4 +FB VOCM 9 J2 R6* S S S S +V +V +V +V VOCM 5 6 7 8 J6 GND1 C1* R11* GND2 GND3 C3* + GND4 +VS *USER DEFINED VALUE. 08990-001 Figure 3. Differential Driver Evaluation Board Schematic Rev. 0 | Page 3 of 8

UG-132 Evaluation Board User Guide EVALUATION BOARD HARDWARE POWER SUPPLIES VOCM INPUT Power is applied to the board through test pins +VS and −VS An external voltage can be applied to VOCM via J6 (referenced to (see Figure 3). The board accommodates single or dual supplies. the ground plane of the board). In ADC driving applications, it For single-supply operation, connect the negative supply to the is convenient to apply the ADC dc reference voltage output ground plane. directly to J6. The R11 component position can be used for both resistors and capacitors. A 0.1 μF capacitor is used in It is very important that the power supply pins of the device normal applications to provide bypassing for the dc voltage under test (DUT) have broadband decoupling circuitry. The applied to the V pin. OCM board layout facilitates this with footprints for a 0508 ceramic capacitor C1 and C2) on each supply. Bulk decoupling is It is also possible to drive the VOCM input from an external ac provided by C3 and C4; 10 µF tantalum capacitors are source. In this case, omit R11 or reduce it to a value that allows recommended. the desired signal to be passed. FEEDBACK NETWORKS AND INPUT/OUTPUT COMMON-MODE VOLTAGE TERMINATIONS The internal common-mode feedback loop used in the differen- tial drivers forces the output common-mode voltage to be equal R1/RG and R2/RF comprise the upper resistive feedback loop to the voltage applied to the V input, thereby providing (see Figure 3), and R3/RG and R4/RF compose the lower OCM excellent output balance. feedback loop. To minimize summing node capacitances, the ground plane under and around Pin 1 and Pin 8 of the DUT SMA INPUT/OUTPUT CONNECTORS (see Figure 3) and the copper that connects to them have been The inputs and outputs have edge-mounted SMA connectors removed. for convenient connection to coaxial cables. The recommended R5 and R6 are included as input termination resistors for applica- connector type is Johnson Components™, Part Number 142- tions that have single-ended inputs. 0701-801 or equivalent. Rev. 0 | Page 4 of 8

Evaluation Board User Guide UG-132 EVALUATION BOARD LAYOUT 08990-004 Figure 4. Assembly Drawing Component Side 08990-005 08990-006 Figure 5. Component Side Metallization (LFCSP) Figure 6. Circuit Side Metallization (LFCSP) Rev. 0 | Page 5 of 8

UG-132 Evaluation Board User Guide ORDERING INFORMATION BILL OF MATERIALS Table 1. Qty Reference Designator Package Description 2 C3, C4 C7343 10 µF capacitor 2 C1, C2 C0508 Capacitor, 0.1uF 6 J1 to J6 SMASMT SMA connector 12 R1/RG, R2/RF, R3/RG, R4/RF, R5 to R12 R0603 Resistor, user defined value 8 +V, −V, PD/DIS, V , GND1 to GND4 TP1 Test point S S OCM 1 DUT1 16-lead LFCSP Device under test 1 PC board RELATED LINKS Table 2. Resource Description ADA4927-1 Product page, ultralow distortion current feedback differential ADC driver ADA4930-1 Product page, ultralow noise driver for low voltage ADCs ADA4932-1 Product page, low power differential ADC driver ADA4937-1 Product page, single supply ultralow distortion differential ADC driver ADA4938-1 Product page, ultralow distortion differential ADC driver ADA4939-1 Product page, G > 2 ultralow distortion differential ADC driver Rev. 0 | Page 6 of 8

Evaluation Board User Guide UG-132 NOTES Rev. 0 | Page 7 of 8

UG-132 Evaluation Board User Guide NOTES ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG08990-0-10/10(0) Rev. 0 | Page 8 of 8