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rev. 0.3 9/12 copyright ? 2012 by silicon laboratories si87xx-evb si87xx-evb si87 xx led e mulator i nput i solator e valuation b oard u ser ? s g uide 1. introduction the si87xx evaluation board allows designers to evaluate silicon lab's family of cmos based led emulator input isolators. the si87xx isolators are pi n-compatible, single-channel, drop-in replacements for popular optocouplers with data rates up to 15 mbps. these devices isolate hi gh-speed signals and offer pe rformance, reliability, and flexibility advantages not available with optocoupler solutions. the si87xx series is based on silicon labs' proprietary cmos isolation technology for low-power and high-speed operation and are resistant to the wear-out effects found in optocouplers that degrade performanc e with increasing temperature, forward current, and device age. as a result, the si87xx series offer longer service life and dramatically higher reliability compared to optocouplers. ordering options for the family include op en collector output with or without integrated pull-up resistor or with an output enable pin. the evaluation kit consists of four separately orderable boards with each board featuring either the dip8, soic8, sdip6, or lga8 package. for more information on configuring the isolator itself, see the si87xx product data sheet and as well as application note ?an681: using the si87xx led emulator input family of isolators?. 1.1. kit contents the si87xx evaluation kit contains the following items: ?? si87xx based evaluation board as shown in figures 1 through 4. ?? si87xx led emulator input isolator (installed on the evaluation board) ?? si8710 (dip8, sdip6) ?? si8712 (soic8, lga8) figure 1. si87xx dip8 evaluation board overview figure 2. si87xx soic8 evaluation board overview
si87xx-evb 2 rev. 0.3 figure 3. si87xx sdip6 evaluation board overview figure 4. si87xx lga8 evaluation board overview
si87xx-evb rev. 0.3 3 2. required equipment the following equipment is required to demonstrate the evaluation board: ?? 1 digital multimeter ?? 2 multimeter test leads (red and black) ?? 1 oscilloscope (tektronix tds 2024b or equivalent) ?? 1 bnc splitter ?? 3 coaxial cables ?? 1 dc power supply (hp6024a, 30 v dc, 0?100 ma or equivalent) ?? 2 bnc to clip converters (red and black) ?? 2 banana to clip wires (red and black) ?? 1 clip to clip wir e (any color) ?? 1 function generator (agilent 33220a, 20 mhz or equivalent) ?? si87xx evaluation board (board under test) ?? si87xx led emulator input evaluati on board user's guide (this document)
si87xx-evb 4 rev. 0.3 3. hardware overview and demo figure 5 illustrates the connection di agram to demonstrate the si87xx-di p8 evb. the other footprint boards demonstrate in a similar fashion. this demo transmits a 500 khz (5 v peak, 50 percent duty cycle) square wave through the isolator to its output (vo). in this exampl e, vdd is powered by a 5 v supply. figure 6 shows a scope shot of ch1 (input) and ch2 (output). note that if a us er wants to evaluate an led emulator input isolator other than the ones pre-populated, this can be accomplished by removing the installed device and replacing it with the desired footprint-compatible isolator device. figure 5. summary diagram and test setup figure 6. oscilloscope display of input and output output to scope ch2 signal input (500 khz, 5 vpk) square wave power supply (5 v) input to scope ch1 + - + _ + _
si87xx-evb rev. 0.3 5 3.1. board jumper settings to run the demo, follow the instruct ions below. review figure 5 and figures 11 through 14 if necessary. 1. if demonstrating the soic8 or lg a8 evb featuring the si8712 (si8710 for dip8), en sure that j2, j4, and j5 are installed as shown in figure 1, 2, or 4. 2. if demonstrating the sdip6 evb feat uring the si8710, ensure that j2 and j3 are installed as shown in figure 3. 3.2. dc supply configuration 1. turn off the dc power supply and ensure that the output voltage is set to its lowest output voltage. 2. connect the banana ends of the black and red banana to clip terminated wires to the outputs of the dc supply. 3. then, connect the clip end of the red and black banana to clip wires to p2. the red wire goes to pin1. the black wire goes to pin4. 4. turn on the dc power supply. 5. adjust the dc power supply to provide 5 v on its output. 6. ensure that the current draw is less than 25 ma. if it is larger, this indicates that either the board or si87xx has been damaged or the supply is connected backwards. 3.3. wave form generator 1. turn on the arbitrary waveform generator with the output disengaged. 2. adjust its output to provide a 500 khz, 0 to 5 v peak square wave (50 percen t duty cycle) to its output. 3. split the output of the generator with a bnc splitter. 4. from the bnc splitter, connect a coaxial cable to ch1 of the scope. this will be the input. 5. connect a second coaxial cable to the bnc splitter, and connect a bnc-to-clip converter to the end of the coaxial cable. 6. from here, connect the clip end of the bnc-to-clip converter to p1, pin1 (red wire here) and pin3 (black wire here). the positive terminal is pin1 on p1. 7. connect one end of a third coaxial cable to a bnc-to-clip converter (note that a scope probe can be used here instead). 8. from here, connect the clip end of the bnc-to-clip converter to p2, pin3 (red wire here) and pin4 (black wire here). vo is on p2 pin3. 9. connect the other end of th e coaxial cable to ch2 of the o scilloscope. this will be the output. 10. engage the output of the waveform generator. 3.4. oscilloscope setup 1. turn on the oscilloscope. 2. set the scope to trigger on ch1 and adjust the trigger level to 1 v minimum. 3. set ch1and ch2 to 2 v per division. 4. adjust the seconds/divis ion setting to 250 ns/division. 5. adjust the level indicator for all channels to properly view each channel as shown in figure 6. a 500 khz square wave should display on channel 1 of the scope for the input and an inverted 5 v version of this square wave should display the output on channel 2, as shown in figure 6. this concludes the basic demo. for more advanced demos, see the following sections.
si87xx-evb 6 rev. 0.3 3.5. adjusting input signal frequency and vdd now is a good time to explore some additional functiona lity of the board. from here the user can do the following: 1. slowly adjust vdd down to 3 v and up to 30 v. then, take the vdd voltage below 2.8 v. once below 2.8 v, it can be seen that the si87xx?s uvlo turns on. in this condition, the output shoul d turn off and is pulled to vdd in which case the sq uare wave disappears. 2. next, adjust the supply back to 5 v. 3. another dial the user can adjust is the frequency dial on the square wave generator. turn this dial from tens of hz up to 15 mhz and observe the scope output. note: to alter the output drive strength, r4 can be adjusted. feel free to vary the 348 ? (the default board setting) r4 to sev- eral k ? . changing this value alters the rise/fall times at the expense or benefit of power co nsumption. consult the prod- uct data sheet as higher value resistors will not accommodate full 30 v operation. 3.6. enable test (dip8, so ic8, and lga8 boards only) the next test demonstrates the enable functi on of the si8712. to perform this test: 1. remove the shunt on j4. 2. connect a clip-to-clip wire from p2, pin2 (ve/vl) to p2, pin4 (gnd2). 3. the output should be pulled to vdd and the square wave turned off. 4. to resume normal operation, remove the clip-to-clip wire on p2, and reinstall the shunt on j4 (position 1-2). 3.7. using the internal pu ll-up resistor (dip 8, soic8, and lga8 boards only) to use the internal pull-up re sistor, the user will need to: 1. replace the default device with a si8711. 2. remove j5. 3. move the shunt on j4 to position 2?3. 4. any of the tests described above can now be repeated.
si87xx-evb rev. 0.3 7 4. open loop pol evaluation board the power and jumper connections descriptions are summarized here: ?? p1 external input sig nal connections to drive the led emulator. ?? p2 external output signal connections. ?? j1 jumper when installed used to accommodate common-anode drive. ?? j2 jumper when insta lled used to accommodate common-cathode drive. ?? j3, j5 jumper used to co nnect external pull-up resistor r4. ?? j4 jumper used to tie the enable pin to vdd and activate the output of the si8712; the jumper can also be used activate the internal pull-up resistor on the si8711. 4.1. voltage and current sense test points the si87xx evaluation board has several test points. thes e test points correspond to the respective pins on the si87xx integrated circuits as well as other useful inspection points. see figures 7 through 10 for a silkscreen overview. see schematics in figures 11 through 14 for more details. figure 7. si87xx dip8 evaluation board silkscreen figure 8. si87xx soic8 evaluation board silkscreen
si87xx-evb 8 rev. 0.3 figure 9. si87xx sdip6 evaluation board silkscreen figure 10. si87xx lga8 evaluation board silkscreen
si87xx-evb rev. 0.3 9 5. si87xx evaluation board schematics figure 11. si87xx dip8 evaluation board schematic
si87xx-evb 10 rev. 0.3 figure 12. si87xx soic8 evaluation board schematic
si87xx-evb rev. 0.3 11 figure 13. si87xx sdip6 evaluation board schematic
si87xx-evb 12 rev. 0.3 figure 14. si87xx lga8 evaluation board schematic
si87xx-evb rev. 0.3 13 6. bill of materials table 1. si87xx dip8 evaluation board bill of materials item qty ref part # supplier description value 1 1 c2 311-1140-2-nd digikey cap, 0.1 f, x7r, ceramic, 50 v, 0805, ? 10%, or eq, rohs 0.1 f 2 1 c3 445-5205-1-nd digikey cap, 1.0 f, x7s, ceramic, 805, 100 v, ? 10%, rohs 1.0 f 3 2 c1, c4 cap 0805 digikey cap, no pop, 0805, or eq, rohs no pop 4 2 j1, j5 s1011e-02-nd digikey stake header, 1x2, 0.1?ctr, gold, or eq, rohs 1x2 header 5 2 j4, p1 s1011e-03-nd digikey stake header, 1x3, 0.1?ctr, or eq, rohs hdr1x3 6 1 p2 s1011e-04-nd digikey stake header, 1x4, 0.1?ctrs, or eq, rohs hdr1x4 7 1 j2 s2011e-02-nd digikey stake header, 2x2, 0.1?ctr, gold, or eq, rohs 2x2 header 8 1 r1 311-267crct-nd digikey res, 267 ? , smt, 0805, 1/8 w, ? 1%, or eq, rohs 267 9 1 r4 311-348crct-nd digikey res, 348 ? , 0805, 1/8 w, ? 1%, or eq, rohs 348 10 2 r2-3 no pop digikey res, no pop, smt, 0805, or eq, rohs no pop 11 4 sj1-4 s9001-nd digikey conn, jumper shorting, tin, or eq, rohs. (insert after test) shunt jumper 12 1 u1 si8710ac-b-ip silicon labs isolator, 3.75 kv emulator input, dip8-gw, rohs si8710ac-b-ip 13 4 sf1-4 sj5744-0-nd digikey bumpon protective, bumper, silicone, or eq, rohs s f blk sm 14 10 tp1-10 5002k-nd digikey test point, pc compact, 0.63?d white, or eq, rohs 5002
si87xx-evb 14 rev. 0.3 table 2. si87xx soic8 evaluation board bill of materials item qty ref part # supp lier description value 1 1 c2 311-1140-2-nd digikey cap, 0.1 f, x7r, ceramic, 50 v, 0805, ? 10%, or eq, rohs 0.1 f 2 1 c3 445-5205-1-nd digikey cap, 1.0 f, x7s, ceramic, 805, 100 v, ? 10%, rohs 1.0 f 3 2 c1, c4 cap 0805 digikey cap, no pop, 0805, or eq, rohs no pop 4 2 j1, j5 s1011e-02-nd digikey stake header, 1x2, 0.1?ctr, gold, or eq, rohs 1x2 header 5 2 j4, p1 s1011e-03-nd digikey stake header, 1x3, 0.1?ctr, or eq, rohs hdr1x3 6 1 p2 s1011e-04-nd digikey stake header, 1x4, 0.1?ctrs, or eq, rohs hdr1x4 7 1 j2 s2011e-02-nd digikey stake header, 2x2, 0.1?ctr, gold, or eq, rohs 2x2 header 8 1 r1 311-267crct-nd digikey res, 267 ? , smt, 0805, 1/8 w, ? 1%, or eq, rohs 267 9 1 r4 311-348crct-nd digikey res, 348 ? , 0805, 1/8 w, ? 1%, or eq, rohs 348 10 2 r2-3 no pop digikey res, no pop, smt, 0805, or eq, rohs no pop 11 4 sj1-4 s9001-nd digikey conn, jumper shorting, tin, or eq, rohs. (insert after test) shunt jumper 12 1 u1 si8712ac-b-is silicon labs 3.75 kv led emulator input, open collector output isolator, soic-8, rohs si8712ac-b-is 13 4 sf1-4 sj5744-0-nd digikey bumpon protective, bumper, silicone, or eq, rohs s f blk sm 14 10 tp1-10 5002k-nd digikey test point, pc compact, 0.63?d white, or eq, rohs 5002
si87xx-evb rev. 0.3 15 table 3. si87xx sdip6 evaluation board bill of materials item qty ref part # supplier description value 1 1 c2 311-1140-2-nd digikey cap, 0.1 f, x7r, ceramic, 50 v, 0805, ? 10%, or eq, rohs 0.1 f 2 1 c3 445-5205-1-nd digikey cap, 1.0 f, x7s, ceramic, 805, 100 v, ? 10%, rohs 1.0 f 3 2 c1, c4 cap 0805 digikey cap, no pop, 0805, or eq, rohs no pop 4 2 j1, j3 s1011e-02-nd digikey stake header, 1x2, 0.1?ctr, gold, or eq, rohs 1x2 header 5 2 p1-2 s1011e-03-nd digikey stake header, 1x3, 0.1?ctr, or eq, rohs hdr1x3 6 1 j2 s2011e-02-nd digikey stake header, 2x2, 0.1?ctr, gold, or eq, rohs 2x2 header 7 1 r1 311-267crct-nd digikey res, 267 ? , smt, 0805,1/8 w, ? 1%, or eq, rohs 267 8 1 r4 311-348crct-nd digikey res, 348 ? , 0805, 1/8w, ? 1%, or eq, rohs 348 9 2 r2-3 no pop digikey res, no pop, smt, 0805, or eq, rohs no pop 10 4 sj1-4 s9001-nd digikey conn, jumper shorting, tin, or eq, rohs. (insert after test) shunt jumper 11 1 u1 si8710ad-b-is silicon labs isolator, 5 kv emulator input, sdip6, rohs si8710ad-b-is 12 4 sf1-4 sj5744-0-nd digikey bumpon protective, bumper, silicone, or eq, rohs s f blk sm 13 9 tp1-9 5002k-nd digikey test point, pc compact, 0.63?d white, or eq, rohs 5002
si87xx-evb 16 rev. 0.3 table 4. si87xx lga8 evaluation board bill of materials item qty ref part # supplier description value 1 1 c2 311-1140-2-nd digikey cap, 0.1 f, x7r, ceramic, 50 v, 0805, ? 10%, or eq, rohs 0.1 f 2 1 c3 445-5205-1-nd digikey cap, 1.0 f, x7s, ceramic, 805, 100 v, ? 10%, rohs 1.0 f 3 2 c1, c4 cap 0805 digikey cap, no pop, 0805, or eq, rohs no pop 4 2 j1, j5 s1011e-02-nd digikey stake header, 1x2, 0.1?ctr, gold, or eq, rohs 1x2 header 5 2 j4, p1 s1011e-03-nd digikey stake header, 1x3, 0.1?ctr, or eq, rohs hdr1x3 6 1 p2 s1011e-04-nd digikey stake header, 1x4, 0.1?ctrs, or eq, rohs hdr1x4 7 1 j2 s2011e-02-nd digikey stake header, 2x2, 0.1?ctr, gold, or eq, rohs 2x2 header 8 1 r1 311-267crct-nd digikey res, 267 ? , smt, 0805, 1/ 8w, ? 1%, or eq, rohs 267 9 1 r4 311-348crct-nd digikey res, 348 ? , 0805, 1/8 w, ? 1%, or eq, rohs 348 10 2 r2-3 no pop digikey res, no pop, smt, 0805, or eq, rohs no pop 11 4 sj1-4 s9001-nd digikey conn, jumper shorting, tin, or eq, rohs. (insert after test) shunt jumper 12 1 u1 si8712ad-b-im silicon labs isolator, 5 kv led emulator input, lga8, rohs si8712ad-b-im 13 4 sf1-4 sj5744-0-nd digikey bumpon protective, bumper, silicone, or eq, rohs s f blk sm 14 10 tp1-10 5002k-nd digikey test point, pc compact, 0.63?d white, or eq, rohs 5002
si87xx-evb rev. 0.3 17 7. ordering guide table 5. si87xx evaluation board ordering guide ordering part number (opn) description si87xxdip8-kit si87xx isolator evaluati on board kit featuring dip8 package SI87XXSOIC8-KIT si87xx isolator evaluati on board kit featuring soic8 package si87xxsdip6-kit si87xx isolator evaluati on board kit featuring sdip6 package si87xxlga8-kit si87xx isolator evaluati on board kit featuring lga8 package
si87xx-evb 18 rev. 0.3 d ocument c hange l ist revision 0.1 to revision 0.2 ? updated schematics in figures 11, 12, 13, and 14. ? updated bom tables 1, 2, 3, and 4. ? updated part numbers in "7. ordering guide" on page 17. revision 0.2 to revision 0.3 ? updated document throughout to change dip8 board to use si8710 instead of si8712.
si87xx-evb rev. 0.3 19 n otes :
si87xx-evb 20 rev. 0.3 c ontact i nformation silicon laboratories inc. 400 west cesar chavez austin, tx 78701 tel: 1+(512) 416-8500 fax: 1+(512) 416-9669 toll free: 1+(877) 444-3032 please visit the silicon labs technical support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. patent notice silicon labs invests in research and development to help our cust omers differentiate in the market with innovative low-power, s mall size, analog- intensive mixed-signal soluti ons. silicon labs' extensive pat ent portfolio is a testament to our unique approach and world-clas s engineering team. silicon laboratories and silicon labs are trademarks of silicon laboratories inc. other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. the information in this document is believed to be accurate in all respects at the time of publ ication but is subject to change without notice. silicon laboratories assumes no responsibility for errors and om issions, and disclaims responsibi lity for any consequences resu lting from the use of information included herein. ad ditionally, silicon laboratorie s assumes no responsibility for the functioning of und escribed features or parameters. silicon laboratories reserves the right to make changes without further notice . silicon laboratories makes no wa rranty, rep- resentation or guarantee regarding the suitability of its products for any particular purpose, nor does silicon laboratories as sume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including wi thout limitation conse- quential or incidental damages. silicon laborat ories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of t he silicon laboratories product could create a s ituation where per- sonal injury or death may occur. should buyer purchase or us e silicon laboratories products for any such unintended or unauthor ized ap- plication, buyer shall indemnify and hold silicon laboratories harmles s against all claims and damages.

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