ADA4940-1ACP-EBZ

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 Accommodates the ADA492x-1 and ADA493x-1 family of differential amplifiers Allows for various circuit configurations Enables quick breadboarding/prototyping Edge-mounted circuit configuration Easy connection to test equipment and other circuits RoHS compliant The Analog Devices, Inc., differential driver evaluation board makes it easy for designers to obtain quick performance results for their particular differential driver application circuits. The board layout is very flexible and allows for many circuit configurations, including traditional four-resistor circuits, circuits with two different feedback loops, circuits with input and output transformers, filters, and many others. Most resistors 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. 08990-003 08990-003 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. Figure 1. Component Side (LFCSP) PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Figure 2. Circuit Side (LFCSP) Rev. 0 | Page 1 of 8 UG-132 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1  VOCM Input ......................................................................................4  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* R12* PD J3 J1 R5* 13 –VS 14 –VS E-PAD R1/RG* 15 –VS 16 –VS 17 1 –FB PD 12 2 +IN –OUT 11 +OUT 10 R9* R2/RF* J4 R7* DUT1 3 –IN R4/RF* R3/RG* 4 +FB VOCM 9 R10* +VS +VS +VS R6* +VS 5 6 7 8 VOCM J6 C1* GND1 R11* GND2 GND3 GND4 +VS C3* + *USER DEFINED VALUE. Figure 3. Differential Driver Evaluation Board Schematic Rev. 0 | Page 3 of 8 08990-001 J2 J5 R8* 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 (see Figure 3). The board accommodates single or dual supplies. For single-supply operation, connect the negative supply to the ground plane. An external voltage can be applied to VOCM via J6 (referenced to the ground plane of the board). In ADC driving applications, it is convenient to apply the ADC dc reference voltage output directly to J6. The R11 component position can be used for both resistors and capacitors. A 0.1 μF capacitor is used in normal applications to provide bypassing for the dc voltage applied to the VOCM pin. It is very important that the power supply pins of the device under test (DUT) have broadband decoupling circuitry. The board layout facilitates this with footprints for a 0508 ceramic capacitor C1 and C2) on each supply. Bulk decoupling is provided by C3 and C4; 10 µF tantalum capacitors are recommended. It is also possible to drive the VOCM input from an external ac source. In this case, omit R11 or reduce it to a value that allows the desired signal to be passed. COMMON-MODE VOLTAGE FEEDBACK NETWORKS AND INPUT/OUTPUT TERMINATIONS R1/RG and R2/RF comprise the upper resistive feedback loop (see Figure 3), and R3/RG and R4/RF compose the lower feedback loop. To minimize summing node capacitances, the ground plane under and around Pin 1 and Pin 8 of the DUT (see Figure 3) and the copper that connects to them have been removed. R5 and R6 are included as input termination resistors for applications that have single-ended inputs. The internal common-mode feedback loop used in the differential drivers forces the output common-mode voltage to be equal to the voltage applied to the VOCM input, thereby providing excellent output balance. SMA INPUT/OUTPUT CONNECTORS The inputs and outputs have edge-mounted SMA connectors for convenient connection to coaxial cables. The recommended connector type is Johnson Components™, Part Number 1420701-801 or equivalent. Rev. 0 | Page 4 of 8 Evaluation Board User Guide UG-132 08990-004 EVALUATION BOARD LAYOUT 08990-006 08990-005 Figure 4. Assembly Drawing Component Side 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 2 2 6 12 8 1 1 Reference Designator C3, C4 C1, C2 J1 to J6 R1/RG, R2/RF, R3/RG, R4/RF, R5 to R12 +VS, −VS, PD/DIS, VOCM, GND1 to GND4 DUT1 Package C7343 C0508 SMASMT R0603 TP1 16-lead LFCSP Description 10 µF capacitor Capacitor, 0.1uF SMA connector Resistor, user defined value Test point Device under test PC board RELATED LINKS Table 2. Resource ADA4927-1 ADA4930-1 ADA4932-1 ADA4937-1 ADA4938-1 ADA4939-1 Description Product page, ultralow distortion current feedback differential ADC driver Product page, ultralow noise driver for low voltage ADCs Product page, low power differential ADC driver Product page, single supply ultralow distortion differential ADC driver Product page, ultralow distortion differential ADC driver 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