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 please see the last page for an important warning and legal terms and conditions. rev. 0 | page 1 of 8 features 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 general description 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. 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 figure 1. component side (lfcsp) 08990-003 figure 2. circuit side (lfcsp)
UG-132 evaluation board user guide rev. 0 | page 2 of 8 table of contents features .............................................................................................. 1 ? general description ......................................................................... 1 ? revision history ............................................................................... 2 ? differential driver evaluation board schematic .......................... 3 ? evaluation board hardware ............................................................ 4 ? power supplies .............................................................................. 4 ? feedback networks and input/output terminations ............. 4 ? v ocm input ......................................................................................4 ? common-mode voltage ...............................................................4 ? sma input/output connectors ..................................................4 ? evaluation board layout ..................................................................5 ? ordering information .......................................................................6 ? bill of materials ..............................................................................6 ? related links ......................................................................................6 ? revision history 10/10revision 0: initial version
evaluation board user guide ug- 132 rev. 0 | page 3 of 8 differential driver evaluation board sch ematic ?v s ?v s ?v s +v s +v s +v s +v s +fb ?in +in ?fb v ocm +out ?out pd ?v s e-pad +v s ?v s vocm 5 6 7 8 9 10 11 12 13 14 15 1 16 2 3 4 17 dut1 j2 j1 j6 j5 j4 j3 gnd1 gnd2 gnd3 gnd4 r6* r3/rg* r5* r10* r1/rg* r7* r8* r2/rf* r4/rf* r11* c4* + c2* c3* + c1* r12* r9* *user defined value. 08990-001 pd figure 3. differential driver evaluation board schematic
ug- 132 evaluation board user guide rev. 0 | page 4 of 8 evaluation board har dware power supplies power is applied to the board through test pins +v s and ? v s (see figure 3 ) . the board accommodates single or dual supplies. for single - supply operation, connect the negative supply to the ground plane. it is very important that the power supply pins of the device under test (dut) have b roadband decoupling circuitry. the board layout facilitates this with footprints for a 0 5 0 8 ceramic capacitor c1 and c2) on each supply. bulk decoupling is provided by c 3 and c 4 ; 10 f tantalum capacitors are recommended. feedback networks an d input/output terminations r 1/rg and r2/rf comp ris e the upper resistive feedback loop (see figure 3 ), and r 3/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 applica - tions that have single - ended inputs. v ocm input an external voltage can be applied to v ocm 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 f capacitor is used in normal applications to provide bypassing for the dc voltage applied to the v ocm pin. it is also possible to drive the v ocm input from an external ac source. in this case, omit r11 or reduce it to a value that allows the desired sign al to be passed. common - mode voltage the internal common - mode feedback loop used in the differen - tial drivers forces the output common - mode voltage to be equal to the voltage applied to the v ocm input, thereby providing excellent output balance. sma inpu t/output connectors the inputs and outputs have edge - mounted sma connectors for convenient connection to coaxial cables. the recom mended connector type is johnson components? , part number 142- 0701- 801 or equivalent.
evaluation board user guide ug- 132 rev. 0 | page 5 of 8 evaluation board layout 08990-004 figure 4 . assembly drawing component side 08990-005 figure 5 . component side metallization (lfcsp) 08990-006 figure 6. circuit side metallization (lfcsp)
ug- 132 evaluation board user guide rev. 0 | page 6 of 8 ordering information bill of materials table 1 . qty reference designator package description 2 c3 , c 4 c7343 10 f capacitor 2 c1, c2 c 0508 capacitor, 0.1uf 6 j1 to j 6 smasmt sma c onnector 1 2 r1/r g, r2 /rf, r3/rg, r4/rf, r5 to r12 r 0603 resistor, u ser d efined v alue 8 +v s , ? v s , pd/dis, v ocm , gnd1 to gnd4 tp 1 test point 1 d u t 1 16- lead lfcsp device under test 1 pc board related links table 2 . resource description ad a4927 -1 product p age , ultralow dist ortion current feedback differential adc driver ada4930 -1 product p age , ultralow noise driver for low voltage adcs ada4932 -1 product p age , low power different ial adc driver ada4937 -1 product p age , single supply ultralow distortion differential adc driver ada4938 -1 product p age , ultralow distortion differential adc driver ada4939 -1 product page, g > 2 ultralow distortion differential adc driver
evaluation board user guide ug- 132 rev. 0 | page 7 of 8 notes
UG-132 evaluation board user guide rev. 0 | page 8 of 8 notes esd caution esd (electrostatic discharge) sensitive device . charged devices and circuit boards can discharge without detectio n. although this product features patented or proprietary pr otection 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 ev aluation 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 a nd 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 a greement 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 condition s of the agreement, adi hereby grants to customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable li cense 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 boar d; 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 evaluatio n board is not sold to customer; all righ ts not expressly granted herein, including ownership of the evaluation board, are reserved by adi. confiden tiality. this agreement and the evaluation board shall all be c onsidered the confidential and propriet ary 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 restri ctions. customer may not disassemble, decompile or reverse engine er 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 o r 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. termina tion. 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 re presentations, endorsements, gua rantees, 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 damag es resulting from customers possession or use of the evaluation board, including but not limited to lost profits, delay costs, labor costs or loss of goodwill. adis total liab ility 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 evaluati on 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 constru ed 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 federa l 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 prop erty of their respective owners. ug08990-0-10/10(0)
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