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5 kv rms dual channel digital isolators data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 document feedback information furnished by analog devices is believed to be accura te and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 ? 2012 analog devices, inc. all rights reserved. technical support www.analog.com features high isolation voltage: 5000 v rms up to 1 00 mbps data rate low propagation delay: 24 ns maximum low dynamic power consumption bidirectional communicati on 3 v to 5 v level translation high temperature operation: 1 2 5c high common - mode transient im munity: > 25 kv/s default high output: adum 2 280/adum228 1 default low output: adum 228 5/adum 228 6 16 - lead soic wide body enhanced creepage package safety and regulatory approvals (pending) ul recognition: 5000 v rms for 1 minute per ul 1577 csa component acceptance notice #5a iec 60601 - 1: 250 v rms (reinforced) iec 60950 - 1: 400 v rms (reinforced) vde certificate of conformity din v vde v 0884 - 10 (vde v 0884 - 10): 2006 - 12 v iorm = 846 v peak pin - compatible with adum220x and adum221x families applications general - purpose, high voltage, multichannel isolation medical equipment power supplies rs- 232/rs - 422/rs - 485 transceiver isolation general description the adum2280 / adum2281 / adum2285 / adum2286 1 (also referred to as adum 228x in this data she et) are 5 kv rms dual - channe l digital isolators based on analog devices, inc., i coupler? technology. combining high speed cmos and monolithic air core transformer technology, these isolation components provide outstanding performance c har acteristics superi or to alternatives , such as optocoupler devices and other integrated couplers . with propagation delay at 24 ns maximum , pulse width distortion is less than 2 n s for c grade . channel - to - channel match ing is tight at 5 ns for c grade. the adum228x are available in two channel configurations with three different data rates up to 100 mbps (see the ordering guide ). all models operate with the supply voltage on either side ranging from 2.7 v to 5.5 v, providing compatibility with lower voltag e systems as well as enabling a voltage translation functionality acro ss the isolation barrier. unlike other optocoupler alternatives, th e adum228x isolator s have a patented refresh feature that ensures dc correctness in the absence of input logic transitions . w hen power is first applied or is not yet applied to the input side, the adum2280 and adum2281 have a default high output and the adum 228 5 and adum2286 have a default low output. functional block dia grams 1 2 3 4 5 6 7 8 gnd 1 nc v dd1 v ia v ib nc gnd 1 nc gnd 2 nc v dd2 v oa v ob nc nc gnd 2 nc = no connect adum2280/ adum2285 16 15 14 13 12 11 10 9 encode encode decode decode pin 1 indicator 10446-001 figure 1 . adum2280 / adum2285 pin -c ompatible with adum2200 / adum2210 1 2 3 4 5 6 7 8 gnd 1 nc v dd1 v oa v ib nc gnd 1 nc gnd 2 nc v dd2 v ia v ob nc nc gnd 2 nc = no connect adum2281/ adum2286 16 15 14 13 12 11 10 9 decode encode encode decode pin 1 indicator 10446-002 figure 2 . adum2281 / adum2286 pin -c ompatible with adum2201 / adum2211 1 protected by u.s. patents 5,952,849 ; 6,873,065 ; 6,903,578 ; and 7,075,329 . o ther patents are pending.
adum2280/adum2281/adum2285/adum2286 data sheet rev. 0 | page 2 of 20 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 functional block diagrams ............................................................. 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 electrical characteristics 5 v oper ation ................................ 3 electrical characteristics 3 v operation ................................ 4 electrical characteristics mixed 5 v/3 v operation ............ 5 electrical characteristics mixed 3 v/5 v operation ............ 6 package characteristics ............................................................... 7 regulator y information ............................................................... 7 insulation and safety - related specifications ............................ 7 din v vde v 0884 - 10 (vde v 0884 - 10) insulation characteristics .............................................................................. 8 recommended operating conditions .......................................8 absolute maximum ratings ............................................................9 es d caution ...................................................................................9 pin configurations and function descriptions ......................... 10 typical performance characteristics ........................................... 13 applications information .............................................................. 14 pc board layout ........................................................................ 14 propagation delay - related parameters ................................... 14 dc correctness and magnetic field immunity ........................... 14 power consumption .................................................................. 15 ins ulation lifetime ..................................................................... 16 outline dimensions ....................................................................... 17 ordering guide .......................................................................... 17 revision history 11 /12 re v ision 0: initial version
data sheet adum2280/adum2281/adum2285/adum2286 r ev. 0 | page 3 of 20 specifications electrical character istics 5 v operation all typical specifications are at t a = 25c, v dd1 = v dd2 = 5 v. minimum/maximum specifications apply over the entire recommended operation range: 4.5 v v dd1 5.5 v, 4.5 v v dd2 5.5 v, ? 40c t a 125c , unless otherwise noted. switching specifications are tested with c l = 15 pf and cmos signal levels , unless otherwise noted. table 1. a grade b grade c grade parameter symbol min typ max min typ max min typ max unit test conditions switching specifications pulse width pw 1000 40 10 ns within pwd limit data rate 1 25 100 mbps within pwd limit propagation delay t phl , t plh 50 39 13 20 24 ns 50% input to 50% output puls e width distortion pwd 10 3 2 ns |t plh ? t phl | change vs. temperature 7 3 1.5 ps/ c propagation delay skew t psk 38 12 9 ns between any two units at same operating conditions channel matching codirectional t pskcd 5 3 2 ns opposing direction t pskod 10 6 5 ns jitter 2 2 1 ns table 2. parameter symbol 1 mbps a, b, c grade s 25 mbps b , c grade s 100 mbps c grade unit test conditions min typ max min typ max min typ max supply current no load adum2 280 / adum2 285 i dd1 1. 3 1.6 6.2 7.0 20 25 ma i dd2 2.7 4.5 4.8 7.0 9.5 15 ma adum2 281 / adum2 286 i dd1 2. 3 2.6 5.8 6. 5 16 19 ma i dd2 2.3 2.9 5.8 6. 5 16.5 19 ma table 3 . for all models parameter symbol min typ max unit test conditions dc specifications logic high input threshold v ih 0.7 v ddx v logic low input threshold v il 0.3 v ddx v logic high output voltages v oh v ddx ? 0.1 5 .0 v i ox = ?20 a, v ix = v ixh v ddx ? 0.4 4 .8 v i ox = ?4 ma, v ix = v ixh logic low output voltages v ol 0.0 0.1 v i ox = 20 a, v ix = v ixl 0.2 0.4 v i ox = 4 ma, v ix = v ixl input current per channel i i ?10 +0.01 +10 a 0 v v ix v ddx su pply current per channel quiescent input supply current i ddi(q) 0.54 0.8 ma quiescent output supply current i ddo(q) 1. 6 2.0 ma dynamic input supply current i ddi(d) 0.09 ma/mbps dynamic output supply current i ddo(d) 0.0 4 ma/mbps undervo ltage lockout positive v ddx threshold v dd x uv+ 2.6 v negative v ddx threshold v dd x uv - 2.4 v v ddx hysteresis v dd x uvh 0.2 v ac specifications output rise/fall time t r /t f 2 .5 ns 10% to 90% common- mode transient immunity 1 |cm| 25 35 kv/s v ix = v ddx , v cm = 1000 v, transient magnitude = 800 v refresh period t r 1 .6 s 1 |cm| is the maximum common - mode voltage slew rate that can be sustained while maintaining v o > 0.8 v ddx . the common - mode voltage slew rates apply to both rising a nd falling common - mode voltage edges.
adu m2280/adum2281/adum2285/adum2286 data sheet rev. 0 | page 4 of 20 elect rical characteristic s 3 v operation all typical specifications are at t a = 25c, v dd1 = v dd2 = 3.0 v. minimum/maximum specifications apply over the entire recommended operation range: 2.7 v v dd1 3.6 v, 2.7 v v dd2 3.6 v, ? 40c t a 125c , unless otherwise noted. switching specifications are tested with c l = 15 pf and cmos signal levels , unless otherwise noted . table 4. a grade b grade c grade parameter symbol min typ m ax min typ max min typ max unit test conditions switching specifications pulse width pw 1000 40 10 ns within pwd limit data rate 1 25 100 mbps within pwd limit propagation delay t phl , t plh 50 39 20 28 35 ns 50% input to 50% output pulse width distortion pwd 10 3 2.5 ns |t plh ? t phl | change vs. temperature 7 3 1.5 ps/ c propagation delay skew t psk 38 16 12 ns between any two units at same operating conditions channel matching codirectional t pskcd 5 3 2.5 ns opposing - direction t pskod 10 6 5 ns jitter 2 2 1 ns 7 codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with in puts on the same side of the isolation barrier. opposing - directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides of the isol ation barrier. table 5. parameter symbol 1 mbps a, b, c grade s 25 mbps b, c grade s 100 mbps c grade unit t est conditions min typ max min typ max min typ max supply current no load adum2280 / adum2285 i dd1 0.75 1.4 5.1 9.0 17 23 ma i dd2 2.0 3.5 2. 7 4.6 4.8 9 ma adum2281 / adum2286 i dd1 1. 6 2.1 3.8 5.0 11 15 ma i dd2 1. 7 2.3 3.9 6.2 11 15 ma table 6 . for all models parameter symbol min typ max unit test conditions dc specifications logic high input threshold v ih 0.7 v ddx v logic low input threshold v il 0.3 v ddx v logic high output voltages v oh v dd x ? 0.1 3 .0 v i ox = ?20 a, v ix = v ixh v dd x ? 0.4 2 .8 v i ox = ?4 ma, v ix = v ixh logic low output voltages v ol 0.0 0.1 v i ox = 20 a, v ix = v ixl 0.2 0.4 v i ox = 4 ma, v ix = v ixl input current per channel i i ?10 +0.01 +10 a 0 v v ix v ddx supply current per channel quiescent input supply current i ddi(q) 0. 4 0.6 ma quiescent output supply current i ddo(q) 1. 2 1.7 ma dynamic input supply current i ddi(d) 0.08 ma/mbps dynamic output supply current i ddo(d) 0.015 ma/mbps undervoltage lockout positive v ddx threshold v ddxuv+ 2.6 v negative v ddx threshold v ddxuv ? 2.4 v v dd x hysteresis v ddxuvh 0.2 v ac specifications output rise/fall time t r /t f 3 ns 10% to 90% common- mode transient immunity 1 |cm| 25 35 kv/s v ix = v ddx , v cm = 1000 v, transient magnitude = 800 v refresh period t r 1 .6 s 1 |c m| is the maximum common - mode voltage slew rate that can be sustained while maintaining v o > 0.8 v dd x. the common - mode voltage slew rates apply to both rising and falling common - mode voltage edges .
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 5 of 20 electrical character istics mixed 5 v/3 v operat ion all t ypical specifications are at t a = 25c, v dd1 = 5 v, v dd2 = 3.0 v. minimum/maximum specifications apply over the entire recom - mended operation range: 4 .5 v v dd1 5.5 v, 2.7 v v dd2 3.6 v; and ? 40c t a 125c , unless otherwise noted. switching specifications are tested with c l = 15 pf and cmos signal levels , unless otherwise noted. table 7. a grade b grade c grade parameter symbol min typ max min typ max min typ max unit test conditions switching specifications pulse width pw 1000 40 10 ns within pwd limit data rate 1 25 100 mbps within pwd limit propagation delay t phl , t plh 50 39 13 20 26 ns 50% input to 50% output pulse width distortion pwd 10 3 2 ns |t plh ? t phl | change vs. temperature 7 3 1.5 ps/c propagation delay skew t psk 38 16 12 ns between any two units at same operating conditions channel matching codirectional t pskcd 5 3 2 ns opposing - direction t pskod 10 6 5 ns jitter 2 2 1 ns 7 codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with in puts on the same side of the isolation barrier. opposing - directional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides of the isolatio n barrier. table 8. parameter symbol 1 mbps a, b, c grade s 25 mbps b, c grade s 100 mbps c grade s unit tes t conditions min typ max min typ max min typ max supply current no load adum2280 / adum2285 i dd1 1. 3 1.6 6.2 7.0 20 25 ma i dd2 2.0 3.5 2.7 4 .6 4.8 9.0 ma adum2281 / adum2286 i dd1 2. 3 2.6 5.8 6. 5 16 19 ma i dd2 1.7 2.3 3.9 6.2 11 15 ma table 9 . for all models parameter symbol min typ max unit test conditions dc specifications logic high input threshold v ih 0.7 v ddx v logic low input threshold v il 0.3 v ddx v logic high output voltages v oh v ddx ? 0.1 v ddx v i ox = ?20 a, v ix = v ixh v ddx ? 0.4 v ddx ? 0.2 v i ox = ?4 ma, v ix = v ixh logic low output voltages v ol 0.0 0.1 v i ox = 20 a, v ix = v ixl 0.2 0.4 v i ox = 4 ma, v ix = v ixl input current per channel i i ?10 +0.01 +10 a 0 v v ix v ddx supply current per channel quiescent input supply c urrent i ddi(q) 0.54 0.75 ma quiescent output supply current i ddo(q) 1.2 2.0 ma dynamic input supply current i ddi(d) 0.09 ma/mbps dynamic output supply current i ddo(d) 0.02 ma/mbps undervoltage lockout positive v dd x threshold v ddxuv+ 2.6 v negative v dd x threshold v ddxuv ? 2.4 v v dd x hysteresis v ddxuvh 0.2 v ac specifications output rise/fall time t r /t f 2.5 ns 10% to 90% common- mode transient immunity 1 |cm| 25 35 kv/s v ix = v ddx , v cm = 1000 v, transient magnitude = 800 v refresh period t r 1.6 s 1 |cm| is the maximum common - mode voltage slew rate that can be sustained while maintaining v o > 0.8 v dd x . the common - mode voltage slew rates apply to both rising and falling common - mode voltage edges.
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 6 of 20 electrical character istics mixed 3 v/5 v operat ion all typical specifications are at t a = 25c, v dd1 = 3.0 v, v dd2 = 5 v. minimum/maximum specifications apply over the entire recom - mended operation range: 2.7 v v dd1 3.6 v, 4.5 v v dd2 5.5 v; and ? 40c t a 125c , unless otherwise noted. switching specifications are tested with c l = 15 pf and cmos signal levels , unless otherwise noted. table 10. a grade b grade c grade parameter symbol min typ m ax min typ max min typ max unit test conditions switching specifications pulse width pw 1000 40 10 ns within pwd limit data rate 1 25 100 mbps within pwd limit propagation delay t phl , t plh 50 39 16 24 30 ns 50% input to 50% output pulse width distortion pwd 10 3 2.5 ns |t plh ? t phl | change vs. temperature 7 3 1.5 ps/?c propagation delay skew t psk 38 16 12 ns between any two units at same operating conditions channel matching codirectional t pskcd 5 3 2.5 ns opposing - direction t pskod 10 6 5 ns jitter 2 2 1 ns 7 codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with in puts on the same side of the isolation barrier. opposing - directional channel matching is t he absolute value of the difference in propagation delays between any two channels with inputs on opposing sides of the isola tion barrier. table 11. parameter symbol 1 mbps a, b, c grade s 25 mbps b, c grade s 100 mbps c grade unit t est conditions min typ m ax min typ max min typ max supply current no load adum2280 / adum2285 i dd1 0.75 1.4 5.1 9.0 17 23 ma i dd2 2.7 4.5 4. 8 7.0 9.5 15 ma adum2281 / adum2286 i dd1 1.6 2.1 3.8 5.0 11 15 ma i dd2 1.7 2.3 5.8 6. 5 1 6.5 19 ma table 12 . for all models parameter symbol min typ max unit test conditions dc specifications logic high input threshold v ih 0.7 v ddx v logic low input threshold v il 0.3 v ddx v logic high output voltages v oh v ddx ? 0.1 v dd x v i ox = ?20 a, v ix = v ixh v ddx ? 0.4 v ddx ? 0.2 v i ox = ?4 ma, v ix = v ixh logic low output voltages v ol 0.0 0.1 v i ox = 20 a, v ix = v ixl 0.2 0.4 v i ox = 4 ma, v ix = v ixl input current per channel i i ?10 +0.01 +10 a 0 v v ix v ddx supply current per channel quiescent input supply current i ddi(q) 0.4 0.75 ma quiescent output supply current i ddo(q) 1.6 2.0 ma dynamic input supply current i ddi(d) 0.08 ma/mbps dynamic output supply current i ddo(d) 0.03 ma/mbps undervoltage lockout positive v dd x threshold v ddx uv+ 2.6 v negative v dd x threshold v ddxuv ? 2.4 v v dd x hysteresis v ddxuvh 0.2 v ac specifications output rise/fall time t r /t f 2.5 ns 10% to 90% common- mode transient immunity 1 |cm| 25 35 kv/s v ix = v ddx , v cm = 1000 v, transient magnitude = 800 v refresh period t r 1.6 s 1 |cm| is the maximum common - mode voltage slew rate that can be sustained while maintaining v o > 0.8 v dd x. the common - mode voltage slew rates apply to both rising and falling common - mode voltage edges.
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 7 of 20 package characterist ics table 13. parameter symbol min typ max unit test conditions resistance and capacitance resistance (input -to - output) 1 r i-o 10 13 ? capacitance (input -to - output) 1 c i-o 2.2 pf f = 1 mhz input capacitance 2 c i 4.0 pf ic junction to ambient thermal resistance ja 45 c/w thermocouple located at the center of the package underside ; test conducted on a 4- layer board with thin traces 1 this device is considered a 2 - terminal device; pin 1 through pin 8 are shorted together and pin 9 through pin 16 are shorted together. 2 input capacitance is from any input data pin to ground. regulatory informati on the adum228x will be approved by the organizations listed in table 14. see table 19 and the absolute maximum ratings section for recommended maximum working voltages for specific cross - isolation waveforms and insulation levels. table 14. ul (pending) csa (p ending) vde (p ending) recognized under ul 1577 component reco g nition program 1 approved under csa component acceptance notice #5a certified according to din v vde v 0884 -10 (vde v 0884 - 10): 2006-12 2 single protection 5000 v rms isolation vol t age basic insulation per csa 60950-1- 07 and iec 609 50-1, 600 v rms (848 v peak) maximum working voltage reinforced insulation, 846 v peak reinforced insulation per csa 60950-1- 07 and iec 60950 - 1, 400 v rms (565 v peak) maximum working vol t age reinforced insulation per iec 60601 -1 250 v rms (353 v pe ak) maximum working voltage file e214100 file 205078 file 2471900 -4880-0001 1 in accordance with ul 1577, each adum228x is proof tested by applying an insulation test voltage 6000 v rms for 1 second (current leakage det ection limit = 10 a). 2 in accordance with din v vde v 0884 - 10 , each adum228x is proof tested by applying an insulation test voltage 1590 v peak for 1 sec (partial discharge detection limit = 5 pc). the * marking branded on the component designates din v vde v 0884 - 10 approval. insulation and safet y- related specifications table 15. parameter symbol value unit test conditions rated dielectric insulation voltage 5000 v rms 1- minute duration minimum external air gap l(i01) 8.0 min mm distance measured from input terminals to output terminals, shortest distance through air along the pcb mounting plane, as an aid to pc board layout minim um external tracking (creepage) l( i02) 8.3 min mm measured from input terminals to output terminals, shortest distance path along body minimum internal gap (internal clearance) 0.017 min mm insulation distance through insulation tracking resistance (comparative tracking index) cti >400 v din iec 112/vde 0303 part 1 isolation group ii material group (din vde 0110, 1/89, table 1)
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 8 of 20 din v vde v 0884 - 10 (vde v 0884- 10) insulation characteristics these isolators are suitable for reinforced electrical isolation only within the safe ty limit data. maintenance of the safety data is ensured by means of protective circuits. note that the asterisk (*) branded on packages denotes din v vde v 0884 - 10 approval for 846 v peak working voltage. table 16. description tes t conditions symbol characteristic unit installation classification per din vde 0110 for rated mains voltage 150 v rms i to iv for rated mains voltage 300 v rms i to ii for rated mains voltage 400 v rms i to ii climatic classification 40/105/21 pollution degree per din vde 0110, table 1 2 maximum working insulation voltage v iorm 846 v pe ak input -to - output test voltage, method b 1 v iorm 1.875 = v pd(m) , 100% production test, t ini = t m = 1 sec, partial discharge < 5 pc v pd(m) 1590 v peak input -to - output test voltage, method a after environmental tests subgroup 1 v iorm 1. 5 = v pd(m) , t ini =60 sec, t m = 1 0 sec, partial discharge < 5 pc v pd(m) 1269 v peak after input and/or safety test subgroup 2 and subgroup 3 v iorm 1.2 = v pd(m) , t ini = 60 sec, t m = 1 0 sec, partial discharge < 5 pc v pd(m) 1818 v peak highest allowable overvoltage v iotm 6000 v peak withstand isolation voltage 1 minute withstand rating v iso 5000 v rms surge isolation voltage v peak = 10 kv, 1.2 s rise time, 50 s , 50% fall time v iosm 6000 v peak safety limiting values maximum value allowed in the event of a failure ( see figure 3 ) case temperature t s 150 c side 1 i dd1 current i s1 555 ma insulation resistance at t s v io = 500 v r s >10 9 ? 600 550 500 450 400 350 safety -limiting current (ma) 300 200 250 150 100 50 50 100 ambient temper a ture (c) 150 200 0 0 10446-003 figure 3 . thermal derating curve, dependence of safety - limiting value s with case temperature per din v vde v 0884 - 10 recommended operatin g conditions table 17. parameter symbol min max unit operat ing temperature t a ?40 +1 25 c supply voltages 1 v dd1 , v dd2 2.7 5.5 v input signal rise and fall times 1.0 ms 1 see the dc correctness and magnetic field immunity section . all voltages are relative to their respective ground.
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 9 of 20 absolute maximum r atings t a = 25c, unless othe rw ise noted. table 18. parameter rating storage temperature (t st ) range ?65c to +150 c ambient operating temperature (t a ) range ?40c to +1 25c supply voltages (v dd1 , v dd2 ) ? 0.5 v to +7.0 v input volta g es (v ia , v ib ) ?0.5 v to v ddi + 0.5 v output voltages (v oa , v ob ) ?0.5 v to v dd2 + 0.5 v average output current per pin 1 side 1 (i o1 ) ?1 0 ma to +1 0 ma side 2 (i o2 ) ?10 ma to + 10 ma common - mode transients 2 ?100 kv/s to +10 0 kv/s 1 see figure 3 for maximum rated current values for various temperatures. 2 refers to common - mode transients across the insulation barrier. common - mode transients exceeding the absolute maximum ratings may cause latch - up or permanent damage. str esses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. esd caution table 19. m aximum continuous working voltage 1 parameter max unit constraint ac voltage, bipolar waveform 565 v peak 50- year minimum lifetime ac voltage, unipolar waveform 1131 v peak 50- year minimum lifetime dc voltage 1131 v peak 50- year minimum lifetime 1 refers to the continuous voltage magnitude imposed across theisolation barrier. see the insulation lifetime section for more details.
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 10 of 20 pin configurations and function descript ions gnd 1 1 nc 2 v dd1 3 v ia 4 gnd 2 16 nc 15 v dd2 14 v oa 13 v ib 5 v ob 12 nc 6 nc 11 gnd 1 7 nc 10 nc 8 gnd 2 9 notes 1. nc = no connec t. 2. pin 1 and pin 7 are internal ly connected, and connecting both t o gnd 1 is recommended. 3. pin 9 and pin 16 are internal ly connected, and connecting both t o gnd 2 is recommended. adum2280/ adum2285 top view (not to scale) 10446-004 figure 4 . adum2280 / adum2285 pin configuration table 20. adum2280 / adum2285 pin function descriptions pin o. mnemonic description 1 gnd 1 ground 1. ground reference for i solator side 1. 2 nc no internal connection. 3 v dd1 supply voltage for isolator side 1, 2.7 v to 5.5 v. 4 v ia logic input a. 5 v ib logic input b. 6 nc no internal connection. 7 gnd 1 ground 1. ground reference for i solator side 1. 8 nc no internal connection. 9 gnd 2 ground 2. ground reference for i solator side 2. 10 nc no internal connection. 11 nc no internal connecti on. 12 v ob logic output b. 13 v oa logic output a. 14 v dd2 supply voltage for isolator side 2, 2.7 v to 5.5 v. 15 nc no internal connection. 16 gnd 2 ground 2. ground reference for i solator side 2. for specific layout guidelines, refer to the an - 1109 application note, recommendations for control of radiated emissions with i coupler devices .
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 11 of 20 gnd 1 1 nc 2 v dd1 3 v oa 4 gnd 2 16 nc 15 v dd2 14 v ia 13 v ib 5 v ob 12 nc 6 nc 11 gnd 1 7 nc 10 nc 8 gnd 2 9 notes: 1. nc = no connec t. 2. pin 1 and pin 7 are internal ly connected, and connecting both t o gnd 1 is recommended. 3. pin 9 and pin 16 are internal ly connected, and connecting both t o gnd 2 is recommended. adum2281/ adum2286 top view (not to scale) 10446-005 figure 5 . adum 228 1/adum 228 6 pin configuration t able 21. adum2281 / adum2286 pin function descriptions pin o. mnemonic description 1 gnd 1 ground 1. ground reference for i solator side 1 . 2 nc no internal connection. 3 v dd1 supply voltage for isolator side 1, 2.7 v to 5.5 v. 4 v oa logic output a. 5 v ib logic input b. 6 nc no internal connection. 7 gnd 1 ground 1. ground reference for i solator side 1. 8 nc no internal connection. 9 gnd 2 ground 2. ground reference for i solator side 2. 10 nc no internal connection. 11 nc no internal connection. 12 v ob logic output b. 13 v ia logic input a. 14 v dd2 supply voltage for isolator side 2, 2.7 v to 5.5 v. 15 nc no internal connection. 16 gnd 2 ground 2. ground reference for i solator side 2. for specific layout guidelines, refer to the an - 1109 application note, recommendations for control of radiated e missions with i coupler devices .
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 12 of 20 table 22. adum2280 truth table (positive logic) v ia input v ib input v dd1 state v dd2 state v oa output v ob output notes h h powered powered h h l l powered powered l l h l powered powered h l l h powered powered l h x x unpowered powered h h outputs return to the input state within 1.6 s of v ddi power restoration. x x powered unpowered indeterminate inde terminate outputs return to the input state within 1.6 s of v ddo power restoration. table 23. adum2281 truth table (positive logic) v ia input v ib input v dd1 state v dd2 state v oa output v ob output notes h h powered powered h h l l powered powered l l h l powered powered h l l h powered powered l h x x unpowered powered indeterminate h outputs return to the input state within 1.6 s of v ddi power restoration. x x powered unpowered h indeterminate outputs return to the input state within 1.6 s of v ddo power restoration. table 24. adum2285 truth table (positiv e logic) v ia input v ib input v dd1 state v dd2 state v oa output v ob output notes h h powered powered h h l l powered powered l l h l powered powered h l l h powered powered l h x x unpowered powered l l outputs re turn to the input state within 1.6 s of v ddi power restoration. x x powered unpowered indeterminate indeterminate outputs return to the input state within 1.6 s of v ddo power restoration. table 25. adum2286 truth table (positive logic) v ia input v ib input v dd1 state v dd2 state v oa output v ob output notes h h powered powered h h l l powered powered l l h l powered powered h l l h powered pow ered l h x x unpowered powered indeterminate l outputs return to the input state within 1.6 s of v ddi power restoration. x x powered unpowered l indeterminate outputs return to the input state within 1.6 s of v ddo power restoration.
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 13 of 20 typical performance characteristics 10 0 2 4 6 8 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v 10446-006 figure 6 . typical supply current per input channel vs. data rate for 5 v and 3 v operation 10 0 2 4 6 8 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v 10446-007 figure 7 . typical supply current per output channel vs. data rate for 5 v and 3 v operation (no output load) 10446-008 10 0 4 2 6 8 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v figure 8 . typical supply current per output channel vs. data rate for 5 v and 3 v operation (15 pf output load) 10446-009 20 0 5 10 15 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v figure 9 . typical adum2 280 or adum2 285 v dd1 supply current vs. data rate for 5 v and 3 v operation 10446-010 20 0 5 10 15 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v figure 10 . typical adum2 280 or adum2 285 v dd2 supply current vs. data rate for 5 v and 3 v operation 10446-0 11 20 0 5 10 15 0 20 40 60 80 100 10 30 50 70 90 current (ma) data rate (mbps) 5v 3v figure 11 . typical adum2 281 or adum2 286 v dd1 or v dd2 supply current vs. data rate for 5 v and 3 v operation
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 14 of 20 application s information pc board layout the adum228x digital isolator s requires no external interface circuitry for the logic interfaces. power supply bypassing is strongly recommended at the input and output supply pins (see figure 12 ). bypass capacitors are most conveniently connected between pin 1 and pin 3 for v dd1 and between pin 14 and pin 1 6 for v dd2 . the capacitor value should be between 0.01 f and 0.1 f. the total lead length between both ends of the capacitor and the input power supply pin should not exceed 20 mm . bypas s ing between pin 3 and pin 7 and between pin 9 and pin 14 should be considered unless the ground pair on each package side are connected close to the package. gnd 1 nc v dd1 v ia /v oa gnd 2 nc v dd2 v oa /v ia v ib v ob nc nc gnd 1 nc nc gnd 2 10446-012 figure 12 . recommended printed circuit board layout in applications involving high common - mode transients, care should be taken to ensure that board coupling across the isol a tion barrier is minimized. furthermore, the board layout should be designed such that any coupling that does occur equally a f fects all pins on a given component side. failure to ensure this could cause voltage differen tials between pins exceeding the devices absolute maximum ratings , thereby leading to latch - up or permanent damage. the adum228x can readily meet cispr 22 class a (and fcc class a) emissions standards, as we ll as the more strin - gent cispr 22 class b (and fcc class b) standards in an unshielded environment, with proper pcb design choices. refer to the an - 1109 application note for pcb- related emi mitigation techni ques, including board layout and stack - up issues. propagation delay - related parameters propagation delay is a parameter that describes the time it takes a logic signal to propagate through a component. the input - to - output propagation delay time for a high - to - low transition may differ from the propagation delay time of a low - to - high transition . input (v ix ) output (v ox ) t plh t phl 50% 50% 10446-013 figure 13 . propagation delay parameters pulse width distortion is the maximum difference between these two propagation delay values and a n indication of how accurately the timing of the input signal is preserved. channel - to - channel matching refers to the maximum amount the propagation delay differs between channels within a single adum228x comp onent. propagation delay skew refers to the maximum amount the propagation delay differs between multiple adum228x components operating under the same conditions. dc correctness and magnetic field immuni ty p ositive and negative logic transitions at the isolator input cause narrow (~1 ns) pulses to be sent via the transformer to the decoder. the decoder is bistable and is, therefore, either set or reset by the pulses indicating input logic transitions. in the absence of logic transitions at the input for more than ~1 s, a periodic set of refresh pulses indicative of the correct input state are sent to ensure dc correctness at the output. if the decoder receives no pulses for more than about 5 s, the input side is assumed to be unpowered or nonfunctional, in which case, the isolator output is forced to a default low state by the watchdog timer circuit . the limitation on the devices magnetic field immunity is set by the condition in which induced voltage in the transformer receiving coil is sufficiently large to either falsely set or reset the decoder. the following analysis defines such conditions. the adum2280 is examined in a 3 v operating condition because it represents the most susceptible mode of operation of this product . the pulses at the transformer output have an amplitude greater than 1.5 v. the decoder has a sensing threshold of about 1.0 v, therefore establishing a 0.5 v margin in which induced voltag es can be tolerated. the voltage induced across the receiving coil is given by v = ( ?d/ dt ) 2 ; = 1, 2, , n where: is the magnetic flux density. r n is the radius of the n th turn in the receiving coil. n is the number of turns in the receiving coil. given the geometry of the receiving coil in the adum 228 0 and an imposed requiremen t that the induced voltage be, at most, 50% of the 0.5 v margin at the decoder, a maximum allowable magnetic field is calculated, as shown in figure 1 4.
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 15 of 20 0.001 0.01 0.1 1 10 100 1k 10k 100k 1m 10m 100m magnetic field frequenc y (hz) maximum allo w able magnetic flux densit y (kgauss) 10446-014 figure 14 . maximum allowable external magnetic flux density for example, at a magnetic field frequency of 1 mhz, the maximum allowable magnetic field of 0. 08 kgauss induces a voltage of 0.25 v at the receiving coil. this is about 50% of the sensing threshold and does not cause a faulty output transition. if such an event occurs, with the worst - case polarity, during a transmitted pulse , it would reduce the received pulse from >1.0 v to 0.75 v. this is still well above the 0.5 v sensing threshold of the decoder. the preceding magnetic flux density values correspond to specific curr ent magnitudes at given distances away from the adum2280 transformers. figure 15 expresses these allowable current magni - tudes as a function of frequency for selected distances. t he adum2280 is very insensitive to external fields. o nly extremely large , high frequency currents, very close to the component could potentially be a concern . for the 1 mhz example noted, one would have to place a 0 .2 ka current 5 mm away from the adum2280 to affect component operation. 0.01 0.1 1 10 100 1000 1k 10k 100k 1m 10m 100m magnetic field frequenc y (hz) 10446-015 maximum allowable current (ka) distance = 5mm distance = 1m distance = 100mm figure 15 . maximum allowable current for various current to adu m2280 spacings note that at combinations of strong magnetic field and high frequency, any loops formed by printed circuit board traces could induce sufficiently large error voltages to trigger the thresholds of succeeding circuitry. take care to avoid pc b structures that form loops . power consumption the supply current at a given channel of the adum228x isolator s is a function of the supply voltage, the data rate of the channel , and the output load of the cha nnel . for each input channel, the supply current is given by i ddi = i ddi ( ) f 0.5 f r i ddi = i ddi (d) (2 f ? f r ) + i ddi ( ) f > 0.5 f r for each output channel, the supply current is given by i ddo = i ddo ( ) f 0.5 f r i ddo = ( i ddo ( d ) + (0.5 10 ?3 ) c l v ddo ) (2 f f r ) + i ddo( ) f > 0.5 f r where: i ddi (d) , i ddo (d) are the input and output dynamic supply currents per channel (ma/ mbps ). c l is the output load capacitance (pf). v ddo is the output supply voltage (v). f is the input logic signa l frequency (mh z); it is half the input data rate , expressed in units of mbps . f r is the input stage refresh rate ( mbps ) = 1/t r (s). i ddi () , i ddo () are the specified input and output quiescent supply currents (ma). to calculate the total v dd1 and v dd2 supply current, the supply currents for each input and output channel corresponding to v dd1 and v dd2 are calculated and totaled. figure 6 and figure 7 show per - channel supply currents as a function of data rate for an u nloaded output condition. figure 8 show s the per - channel supply current as a function of data rate for a 15 pf output condition. figure 9 through figure 11 show the total v dd1 a nd v dd2 supply current as a function of data rate for the adum2280 / adum2285 and adum2281/ adum2286 channel configurations.
adum2280/adum2281/adum2285/adum2286 d ata sheet rev. 0 | page 16 of 20 insulation lifetime all insulation struct ures eventually break down when subjected to voltage stress over a sufficiently long period. the rate of insulation degradation is dependent on the characteristics of the voltage waveform applied across the insulation. in addition to the testing performed by the regulato ry agencies, analog devices carries out an extensive set of evaluations to determine the lifetime of the insulation structure within the adum228x . analog devices performs accelerated life testi ng using voltage levels higher than the rated continuous working voltage. acceleration factors for several operating conditions are determined. t hese factors allow calculation of the time to failure at the actual working voltage . the values shown in table 19 summarize the peak voltage for 50 years of service life for a bipolar ac operating condition and the maximum csa/vde approved working voltage s. in many cases, the approved working voltage is higher than 50 - year servic e life voltage. operation at these high working voltages can lead to shortened insulation life in some cases. t he insulation lifetime of the adum228x depends on the voltage waveform type imposed across the iso lation barrier. the i coupler insulation structure degrades at different rates depending on whether the waveform is bipolar ac, unipolar ac, or dc. figure 16, figure 17 , and figu re 18 illustrate the se different isolation voltage waveforms. bipolar ac voltage is the most stringent environment. the goal of a 50 - year operating lifetime under the ac bipolar condition determines the analog devices recommended maximum working voltage. in the case of unipolar ac or dc voltage, the stress on the insulation is significantly lower. this allows operation at higher working voltages while still achieving a 50 - year service life. the working voltages listed in table 19 can be applied while maintaining the 50 - year minimum lifetime provided the voltage conforms to either the unipolar ac or dc voltage case. any cross - insulation voltage waveform that does not conform to figure 17 or figure 18 should be treated as a bipolar ac waveform, and its peak voltage should be limited to the 50 - year lifetime voltage value listed in table 19 . not e that the voltage presented in figure 17 is shown as sinu - soidal for illustration purposes only. it is meant to represent any voltage waveform varying between 0 v and some limiting value. the limiting value can be positive or negative, but the voltage cannot cross 0 v. 0v rated peak voltage 10446-016 figure 16 . bipolar ac waveform 0v rated peak voltage 10446-017 figure 17 . unipolar ac waveform 0v rated peak voltage 10446-018 figure 18 . dc waveform
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 17 of 20 outline dimensions 1 1-15-20 1 1- a 16 9 8 1 sea ting plane coplanarit y 0.1 1.27 bsc 12.85 12.75 12.65 7.60 7.50 7.40 2.64 2.54 2.44 1.01 0.76 0.51 0.30 0.20 0.10 10.51 10.31 10. 11 0.46 0.36 2.44 2.24 pin 1 mark 1.93 ref 8 0 0.32 0.23 0.71 0.50 0.31 45 0.25 bsc gage plane compliant t o jedec s t andards ms-013-ac figure 19 . 16 - lead standard small outline package, with incre ased creepage [soic_ic] wide body (ri - 16 -2) dimension shown in millimeters ordering guide model 1 , 2 n o. of inputs, v dd1 side n o. of inputs, v dd2 side max data rate max prop delay, 5 v output default state temperature range package description packa ge option adum2280 a riz 2 0 1 mbps 50 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2280 b riz 2 0 25 mbps 35 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 ADUM2280CRIZ 2 0 100 mbps 24 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2281 a riz 1 1 1 mbps 50 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2281 b riz 1 1 25 mbps 35 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2281criz 1 1 100 mbps 24 high ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2285 a riz 2 0 1 mbps 50 low ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2285 b riz 2 0 25 mbps 35 low ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2285criz 2 0 100 mbps 24 low ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 adum2286 a riz 1 1 1 mbps 50 low ?40 c to +1 25 c 16 - lead soic_ic ri - 16 - 2 adum2286 b riz 1 1 25 mbps 35 low ?40 c to +1 25 c 16 - lead soic_ic ri-16-2 adum2286criz 1 1 100 mbps 24 low ?40 c to +1 25 c 16 - lead soic_ic ri -16-2 1 tape and r eel is available. the addition of an - rl suffix designates a 13 (1 , 000 units) tape and reel option. 2 z = rohs compliant part.
adum2280/adum2281/adum2285/adum2286 data sheet rev. 0 | page 18 of 20 notes
data sheet adum2280/adum2281/adum2285/adum2286 rev. 0 | page 19 of 20 notes
adum2280/adum2281/adum2285/adum2286 data sheet rev. 0 | page 20 of 20 notes ? 2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d10446 -0- 1 /12(0)

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