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evaluation board user guide ug - 459 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 evaluation board for ad5686r / ad5686 / AD5684r / AD5684 16 - /12 - bit, quad channel voltage output dac please see the last page for an important warning and legal terms and conditions . rev. 0 | page 1 of 12 features full - fea tured evaluation board for the ad5686r , ad5686 , AD5684r , and AD5684 on - board references various link options pc control in conjunction with analog devices , inc., system demo nstration platform (sdp) package contents ad5686 / ad5686r or AD5684 / AD5684r evaluation board cd includes self - installing software that allows users to control the board and exercise all functions of the device electronic version of the ad5686r , ad5686 , AD5684r , and AD5684 data sheets electronic version of ug- 459 general description th is user guide details the operation of the evaluation board for the ad5686r , ad5686 , AD5684r , and AD5684 quad channel , voltage output digital - to - analog converters ( dacs ). the e va l - ad5686rsdz supports both the ad5686r and ad5686 , and the e va l - AD5684rsdz supports both the AD5684r and AD5684 . the a d568x(r) is used in this user guide to refer to the ad5686r , ad5686 , AD5684r , and AD5684 . the evaluation board is designed to help customers quickly prototype new ad568x(r) circuits and reduce design time. the ad568x(r) operates from a single 2.7 v to 5.5 v supply. the ad5686r and AD5684r incorporate an internal 2.5 v reference to give an output voltage span of 2.5 v or 5 v. t h e ad5686 and AD5684 requ ire an external reference. full data on the ad568x(r) can be found in the appropriate data sheet available from analog devices and should be consulted in conjunction with this user guide when using the evaluation board. the evaluation board interfaces to the usb port of a pc via the sdp board. software is supplied with the evaluation board to allow the user to program the ad568x(r). this evaluation board requires the e va l - sdp - cb1z board (sdp - b controller board), which is available for order on the analog devices website at www.analog.com . evaluation board block diagram figure 1. v logic v dd dgnd dgnd agnd ext_ref vou ta +6v sdp connector eeprom v ref 5v ref 3v ref 10 way header voutb voutc voutd vouta1 v ref voutb1 voutc1 voutd1 spi spi ad5686 AD5684 ad5686r AD5684r 10954-001
ug-459 evaluation board user guide rev. 0 | page 2 of 12 table of contents features .............................................................................................. 1 package contents .............................................................................. 1 general description ......................................................................... 1 evaluation board block diagram ................................................... 1 revision history ............................................................................... 2 evaluation board hardware ............................................................ 3 power supplies .............................................................................. 3 link options ................................................................................. 3 evaluation board software ...............................................................4 installing the software ..................................................................4 running the software ...................................................................4 software operation .......................................................................5 spi command ................................................................................5 evaluation board schematics and artwork ...................................6 ordering info rmation .................................................................... 10 components list ........................................................................ 10 revision history 9/12 rev ision 0 : initial versi on
evaluation board user guide ug-459 rev. 0 | page 3 of 12 evaluation board har dware power supplies to use the evaluation board with the sdp board , a 6 v power supply is required , which is connected to c onnector j3. the evaluation board can be used without the sdp board. in this case , the j1 and j2 conne ctors are used as the power supply inputs. both agnd and dgnd inputs are provided on the board. the agnd and dgnd planes are connected at one location close to the ad568x(r). it is recommended that agnd and dgnd not be connected elsewhere in the system to avoid ground loop problems. all supplies are decoupled to ground with 10 f tantalum and 0.1 f ceramic capacitors. table 1 . power supply connectors connector number voltage j1 external, v logic supply j2 analog power supply, v dd j3 6 v board positive power supply link options a number of link options are incorporated in the evaluation board and must be set for the required operating conditions before using the board. the functions of these link options are described in detail in table 3 . table 2 lists the positions of the different links cont rol led by pc, via the usb port , and the sdp board in single - supply mode is requir ed. table 2 . link options setup for sdp control (default) link number option lk1 a lk2 a lk3 c lk4 b lk5 a lk6 b table 3 . link functions link n umber option lk1 this l ink selects the dac analog voltage source . position a selects the internal voltage source (int_vdd) from the adp3331 . position b selects an external supply voltage (ext_vdd) . lk2 this l ink selects the dac digital voltage source . position a selects the digital voltage source from the sdp board (v_io ). position b selects an external digital supply voltage (ext_vl ogic ). lk3 this link selects the reference source . position a selects the on - board 2.5 v reference as the reference source. do not use t his option with the ad5686r / AD5684r . position b selects the on - board 5 v refe rence as the reference source. do not use t his option with the ad5686r / AD5684r . position c selects the internal reference of the ad5686r / AD5684r as the reference source for the ad5686 / AD5684 . position d selects an off board voltage reference via the ext_ref connector. lk4 this link selects the gain setting of the ad5686 / AD5684 (not populated) . position a selects gain of 2. position b selects gain of 1. lk5 this link selects the gain setting of the ad5686r / AD5684r . position a selects gain of 2. position b selects gain of 1. lk6 this link selects whether the ad5686r / AD5684r or ad5686 / AD5684 is accessed by the so ftware. position a selects the ad5686 / AD5684 . position b selects the ad5686r / AD5684r .
ug-459 evaluation board user guide rev. 0 | page 4 of 12 e valuation board soft ware installing the softw are the evaluation kit for the ad568x(r) includes self -installing software on the cd. the software is compatible with w i n d o w s ? x p, windows vista (32 - bit) and windows 7 (32 - bit). if users need drivers for 64 - bit operating systems, contact linear.apps@analog.com . the software must be installed before connectin g the sdp board to the usb port of the pc to ensure that the sdp board is recognized when it connects to the pc. to install the software, take the following steps: 1. start the windows operating system and insert the cd. 2. the installation software should open automatically. if it does not open automatically , run the setup.exe file from the cd. 3. after installation is completed, power up the evaluation board as described in the power supplies section . 4. connect the evaluation board to the sdp board and the sdp board into the pc using the usb cable included in the box. 5. when the software detects the evaluation board, proceed through any dialog boxes that appear to finalize the installation. running the software to run the program, do the following: 1. connect the evaluation board to the sdp board and connected the usb cable between the sdp board and the pc. 2. power the sdp and evaluation board by connecting 6 v to the j3 connector . 3. click start > all programs > analog devices > ad56x (r) . each of the ad5686r , ad5686 , AD5684r , and AD5684 has its own version of software. click the appropriate one to run the software. as the software connects to the evaluation board , the message in figure 2 displays. figure 2 . connection essage if the sdp board is not connected to the usb port when the software is launched, a connectivity error display s (see figure 3 ). simply connect the evaluation board to the usb port of the pc, wait a few seconds, click rescan , and follow the instructions. figure 3. connectivity error alternatively , the software can be used without an evaluation boar d . the software run s in simulation mode displaying expected outputs based on the input data. the main window of the ad568x(r) evaluation software then opens, as shown in figure 4 . 10954-002 10954-003
evaluation board user guide ug-459 rev. 0 | page 5 of 12 figure 4 . ad568x (r) evaluation board software main window software operation the software for the ad568x(r) allows the user to program values to the i nput and dac registers of each dac individually or collectively. write to input register select write to input register to load the value in the input d ata control to the input register of any dacs selected in the select dac s to use box. write to dac register select write to dac register to load the value in the input data control to the dac register of any dacs selected in the select dacs to u se box. the dac outputs are automatically updated with the appropriated voltage. update dac register from inpu t register select update dac register from input register to copy the value in a dac input register to the corresponding dac register . dac outputs are automatically updated with the appropriated voltage. ldac c ontrol select pulse ldac to bring the ldac pin low and then back high . do this cop ies the data from the input registers to the dac registers, and the outputs update accordingly. any dac updates disabled by the ldac m ask settings are ignored. the ldac pin can also be set high or low by clicking the appropriate radio button. g ain control the logic level of the gain pin is set externally by lk4 or lk5. to display the correct voltage , the gain selection must be set to match the level of the pin. reference control the ad5686r and AD5684r have an on - chip reference that can be disabled to reduce power consumption. the ad5686r and AD5684r software has a control that allows this function to be used. the ad5686 and AD5684 require an external reference. the software for the ad5686 and AD5684 has a control that allows the user to set the reference voltage. power - down control each of the dacs can be powered down individually. each of the da cs has an associated selection box allowing the part to operate in normal mode, powered down with either a 1 k? or a 100 k? resistor to ground or tristate . when the power - down setting for each dac are selected, click write to part to write the appropriate values to the ad568x(r). ldac mask register each of the dacs can be set to accept or ignore ldac pulses. when the ldac selections are completed, click write to part to write the appropriate values to the ad568x(r). spi c ommand on both control tabs of the software , the spi commands sent to the dac display . this show s what must be written to the ad568x(r) to replicate the function of the evaluation board. 10954-004
ug-459 evaluation board user guide rev. 0 | page 6 of 12 evaluation board sch ematics and artwork figure 5 . ad568x (r) schematic ( p age 1 of 2) 10954-005
evaluation board user guide ug-459 rev. 0 | page 7 of 12 figure 6. ad568x(r) schematic ( p age 2 of 2) 10954-006
ug-459 evaluation board user guide rev. 0 | page 8 of 12 figure 7. ad568x(r) component silkscreen figure 8. ad568x(r) top side routing 10954-007 10954-008
evaluation board user guide ug-459 rev. 0 | page 9 of 12 figure 9. ad568x(r) bottom side routing 10954-009
ug-459 evaluation board user guide rev. 0 | page 10 of 12 ordering information components list table 4 . qty reference designator description supplier/part number 1 u7 quad, 16 - bit/12 - bit nanodac+ with spi interface analog devices ad5686 / AD5684 1 u5 quad, 16 - bit/12 - bit nanodac+ with 2 ppm/c on - chip reference and spi interface analog devices ad5686r / AD5684r 1 u1 high accuracy, ultralow quiescent current ldo, sot - 23 analog devices adp3331 1 u3 5 v fixed, adjustable low dropout linear voltage regulator analog devices adp3367 1 u6 ultralow noise xfet 2.5 v voltage reference with current sink and source capability anal og devices adr431 1 u4 ultralow noise xfet 5.0 v voltage reference with current sink and source capability analog devices adr435 8 vouta,vouta1, voutb, voutb2, voutc, voutc1, voutd, voutd1 50 ? smb jack fec 1206013 1 l1 ferrite bead, 600 ? at 100 mhz digi - key 490 - 1024 -1-nd 1 r1 0603, 300 k? resistor digi - key 541 - 300khct -nd 1 r2 resistor, 1 m?, 1%, 0.063w, 0603 digi - key rmcf1/161mfrct -nd 1 j4 120- pin female connector fec 1324660 or digi -k ey h1219 - nd 1 u2 32k , i 2 c serial eeprom (24lc32) fec 1331330 1 c14 capacitor, 0603, 1 f, 10 v fec 318 - 8840 1 r3 resistor, 1.5 ?, 5%, 0.063w, 0603 fec 9331832 2 r8, r9 10 k? smd resistor fec 9330399 2 r17, r18 100 k? smd resistor fec 9330402 2 r4, r11 0 ? resistor, 0805 fec 9333681 3 j5, lk3, lk6 terminal block, 8 - pin (4 2) 0.1" header fec 1022244 3 j1, j2, j3 2 - pin terminal block fec 151789 4 lk1, lk2, lk4, lk5 jumper block using 3 - pin sip header fec 1022248 and fec 150410 8 c1, c3, c5, c7, c8, c9, c16, c20 case a, 10 f capacitor fec 197 - 130 9 tp1, tp2, tp3, tp4, tp5, tp6, tp7, tp8, tp9 red test point fec 8731144 ( p ack) 10 c2, c4, c6, c10, c11, c12, c15, c21, c22, c23 capacitor, 0.1 f, 50 v, 0603 fec 8820023 17 c13, c17, c18, c19, c24, c25, c26, c27, r5, r6, r7, r10, r12, r13, r14, r15, r16 do not populate (dnp) not inserted
evaluation board user guide ug-459 rev. 0 | page 11 of 12 notes
ug-459 evaluation board user guide rev. 0 | page 12 of 12 notes esd caution esd (electrostatic discharge) sensitive device . charged devices and circuit boards can discharge without detection. 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 evaluation board), you are agreeing to be bound by the terms and conditions set forth below (agreement) unless you have purchase d the evaluation board, in which case the analog devices standard terms and conditions of sale shall govern. do not use the e valuation 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 gr ants 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 evalu ation board is provided for the sole a nd exclusive purpose referenced above, and agrees not to use the evaluation board for any other purpose. furthermore, the lic ense 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 bo ard. 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 confi dential 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 o f the evaluation board or termination of this agreement, customer agrees t o promptly return the evaluation board to adi. additional restrictions. customer may not disassemble, decompile or reverse engi neer chips on the evaluation board. customer shall inform adi of any occurred damages or any modifications or alterations it make s 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 boar d provided hereunder is provided a s is and adi makes no warranties or representations of any kind with respect to it. adi specifically disclaims any representations, endorsements, g uarantees, 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 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 li ability from any and all causes shall be limited to the amount of one hundred us dollars ($10 0.00). export. customer agrees that it will not directly or indirectly export the evaluation board to another country, and th at it will comply with all applicable united states federal laws and regulations relating to exports. governing law. this agreemen t 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 fede ral 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 internation al sale of goods shall not apply to this agreement and is expressly disclaime d. ? 2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. ug10954 -0- 9/12(0)

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