IL3585 isoloop? is a registered trademark of nve corporation. *u.s. patent number 5,831, 426; 6,300,617 and others. isb-ds-001-il612-a, january 20, 2005 nve corp., 11409 valley view road, eden prairie, mn 55344-3617, u.s.a. telephone: 952-829-9217, fax 952-829-9189, www.isoloop.com ? 2005 nve corporation profibus compatible isolated rs485 interface functional diagram v id (a-b) de re r d mode 200 mv l l h x receive -200 mv l l l x receive 1.5 v h l h h drive -1.5 v h l l l drive x x h z x hi z r features ? 3.3 / 5 v input supply compatible ? 2500 v rms isolation (1 min) ? 20 ns propagation delay ? 40 mbps data rate ? 5 ns pulse skew ? 20 kv/us transient immunity ? thermal shutdown protection ? -40c to +85c temperature range ? profibus compliant ? 16 pin soic package ? ul1577 approval pending ? iec 61010-1 approval pending applications ? security networks ? profibus dp and fms networks ? building environmental controls ? industrial control networks ? gaming systems ? factory automation description the IL3585 is a galvanically isol ated, high-speed differential bus transceiver, designed for bi-d irectional data communication on balanced transmission lines. isola tion is achieved through patented* isoloop ? technology. the IL3585 offers an exceptional 2.5 v differential output into a 54 ? load, which translates to better data integrity over longer cable lengths, even at data rates as high as 40 mbps. the device is also compatib le with 3.3v input supplies, allowing interface to standard microcontrollers without the need for additional level shifting components. the IL3585 has current limiting and thermal shutdown features to protect against output short circu its and bus contention situations which may cause excessive power dissipation. .com .com .com
IL3585 absolute maximum ratings (11) parameters symbol min. typ. max. units test conditions storage temperature t s -65 150 c ambient operating temperature t a -40 100 c voltage range at a or b bus pins -7 12 v supply voltage (1) v dd 1 , v dd 2 -0.5 7 v digital input voltage -0.5 v dd +0.5 v digital output voltage -0.5 v dd +1 v recommended operating conditions parameters symbol min. typ. max. units test conditions supply voltage v dd 1 v dd 2 3.0 4.5 5.5 5.5 v input voltage at any bus terminal (separately or common mode) v i v ic 12 -7 v high-level digital input voltage v ih 2.4 3.0 v v dd 1 = 3.3 v v dd 1 = 5.0 v low-level digital input voltage v il 0.8 v differential input voltage (2) v id +12/-7 v high-level output current (driver) i oh -60 60 ma high-level digital output current (receiver) i oh -8 8 ma low-level output current (driver) i ol -60 60 ma low-level digital output current (receiver) i ol -8 8 ma ambient operating temperature t a -40 85 c digital input signal rise and fall times t ir ,t if dc stable insulation specifications parameters symbol min. typ. max. units test conditions creepage distance (external) 8.077 barrier impedance ? || pf >10 14 ||7 leakage current 0.2 a rms 240 v rms , 60 hz safety & approvals iec61010-1 tuv certificate numbers: approval pending classification model package pollution degree material group max. working voltage IL3585 soic (0.3 " ) ii iii 300 v rms ul 1577 component recognition program. file #: approval pending rated 2500v rms for 1 minute (soic) electrostatic discharge sensitivity this product has been tested for electrostatic sensitivity to th e limits stated in the specifica tions. however, nve recommends that all integrated circuits be handled with appropriate care to avoid damage. damage caused by inappropr iate handling or storage could range from performance degradation to complete failure. .com .com .com .com
IL3585 pin connections 1 v dd1 input power supply 2 gnd 1 input power supply ground return. (pin 2 is internally connected to pin 8) 3 r output data from bus 4 re read data enable (if re is high, r= high impedance) 5 de drive enable 6 d data input to bus 7 nc no internal connection 8 gnd 1 input power supply ground return. (pin 8 is internally connected to pin 2) 9 gnd 2 output power supply ground return. (pin 9 is internally connected to pin 15) 10 isode isolated de output for us in profibus applications where the state of the isolated drive enable node needs to be monitored. 11 nc no internal connection 12 a non-inverting bus line 13 b inverting bus line 14 nc no internal connection 15 gnd 2 output power supply ground return. (pin 15 is internally connected to pin 9) 16 v dd2 output power supply .com .com .com .com
IL3585 driver section electrical specifications are t min to t max unless otherwise stated. parameters symbol min. typ. (5) max. units test conditions input clamp voltage v ik -1.5 v i l = -18 ma output voltage v o v dd v i o = 0 differential output voltage (2) |v od 1 | v dd v i o = 0 differential output voltage (2) |v od 2 | 2.5 3 5 v r l = 54 ? , v dd = 5 v differential output voltage (2)(6) v od 3 2.3 5 v r l = 54 ? , v dd = 4.5 v change in magnitude of differential output voltage (7) ? |v od | 0.2 v r l = 54 ? or 100 ? common mode output voltage v oc 3 v r l = 54 ? or 100 ? change in magnitude of common mode output voltage (7) ? |v oc | 0.2 v r l = 54 ? or 100 ? output current (4) i o 1 -0.8 ma output disabled , v o = 12 v o = -7 high level input current i ih 10 a v 1 = 3.5 v low level input current i il -10 a v 1 = 0.4 v absolute |short-circuit output current| i os 60 250 a -7 v> v o <12 v supply current (v dd 2 = +5 v) (v dd 1 = +5 v) (v dd 1 = +3.3 v) i dd 2 i dd 1 i dd 1 5 4 3 8 6 4 ma no load (outputs enabled) switching specifications parameters symbol min. typ. (5) max. units test conditions maximum data rate 40 mbps r l = 54 ? , c l = 50 pf differential output prop delay t d (od) 20 30 ns r l = 54 ? , c l = 50 pf pulse skew (10) t s (p) 1 6 ns r l = 54 ? , c l = 50 pf differential output rise & fall time t t (od) 5 8 ns r l = 54 ? , c l = 50 pf output enable time to high level t pzh 20 30 ns r l = 54 ? , c l = 50 pf output enable time to low level t pzl 20 30 ns r l = 54 ? , c l = 50 pf output disable time from high level t phz 20 30 ns r l = 54 ? , c l = 50 pf output disable time from low level t plz 20 30 ns r l = 54 ? , c l = 50 pf skew limit (3) t sk (lim) 2 12 ns r l = 54 ? , c l = 50 pf notes: these apply to both driver and receiver sections 1. all voltage values are with respect to ne twork ground except differential i/o bus voltages. 2. differential input/output voltage is measured at the noninver ting terminal a with respect to the inverting terminal b. 3. skew limit is the maximum propagation delay difference between any two devices at 25c. 4. the power-off measuremen t in ansi standard eia/tia-422-b applies to disabled outputs only and is not applied to combined inp uts and outputs. 5. all typical values are at v dd 1 ,v dd 2 = 5 v or v dd 1 = 3.3 v and t a = 25c. 6. while ?7 v12 v, the minimum v od 2 with a 54 ? load is either ? v od 1 or 2.3 v, whichever is greater. 7. ? |v od | and ? |v oc | are the changes in magnitude of v od and v oc , respectively, that occur when the input is changed form one logic state to the other. 8. this applies for both power on and power off, refer to ans i standard rs-485 for exact condition. the eia/tia-422-b limit do es not apply for a combined driver and receiver terminal. 9. includes 10 ns read enable time. maximum pr opagation delay is 25 ns after read assertion. 10. pulse skew is defined as the |t plh ?t phl | of each channel. 11. absolute maximum specifications mean the device will not be damaged if operated under th ese conditions. it does not guara ntee performance. .com .com .com .com
IL3585 receiver section electrical specifications are t min to t max unless otherwise stated. parameters symbol min. typ. (5) max. units test conditions positive-going input threshold voltage v it + 0.2 v -7 v>v cm <12 v negative-going input threshold voltage v it - ?0.2 v -7 v>v cm <12 v hysteresis voltage (v it + - v it - ) v hys 40 mv v cm =0 v, t=25c high level digital output voltage v oh v dd ? 0.2 v dd v v id = 200 mv i oh = -20 a low level digital output voltage v ol 0.2 v v id = -200 mv i oh = 20 a high-impedance-state output current i oz 1 a v o = 0.4 to (v dd 2 - 0.5) v line input current (8) i i 1 ma v i = 12 v -0.8 ma v i = -7 v input resistance r i 20 k ? supply current (v dd 2 = +5v) (v dd 1 = +5v) (v dd 1 = +3.3v) i dd 2 i dd 1 i dd 1 5 4 3 8 6 4 ma no load outputs enabled switching characteristics @ 5 v parameters symbol min. typ. (5) max. units test conditions maximum data rate 40 mbps r l = 54 ? , c l = 50 pf propagation delay (9) t pd 27 35 ns v o = -1.5 to 1.5 v, c l = 15 pf pulse skew (10) t sk (p) 1 6 ns v o = -1.5 to 1.5 v, c l = 15 pf skew limit (3) t sk (lim) 2 12 ns r l = 54 ? , c l = 50 pf output enable time to high level t pzh 15 25 ns c l = 15 pf output enable time to low level t pzl 15 25 ns c l = 15 pf output disable time from high level t phz 15 25 ns c l = 15 pf output disable time from low level t plz 15 25 ns c l = 15 pf switching characteristics @ 3.3 v parameters symbol min. typ. (5) max. units test conditions maximum data rate 40 mbps r l = 54 ? , c l = 50 pf propagation delay (9) t pd 30 38 ns v o = -1.5 to 1.5 v, c l = 15 pf pulse skew (10) t sk (p) 1 6 ns v o = -1.5 to 1.5 v, c l = 15 pf skew limit (3) t sk (lim) 4 12 ns r l = 54 ? , c l = 50 pf output enable time to high level t pzh 17 27 ns c l = 15 pf output enable time to low level t pzl 17 27 ns c l = 15 pf output disable time from high level t phz 17 27 ns c l = 15 pf output disable time from low level t plz 17 27 ns c l = 15 pf .com .com .com .com
IL3585 6 nve corporation 11409 valley view road eden prairie, mn 55344-3617 usa telephone: ( 952) 829-9217 fax (952) 829- 9189 internet: www.isoloop.com power consumption isoloop devices achieve their low power consumption by detecting the edge transitions of the input logic signal and converting these to narrow current pulses. this tec hnique creates a supply current which is proportional to data ra te, which has obvious advantages over optocouplers whose power c onsumption is dependent on mark:space ratio. table 2. typical dynamic supply currents. data rate (mbps) i dd1 i dd2 1 300 a 300 a 10 3 ma 3 ma 20 6 ma 6 ma 40 12 ma 12 ma power supplies it is required that low esr capacitors such as ceramic are used to decouple the supplies. both v dd1 and v dd2 must be bypassed with 47 nf capacitors. these should be placed as close as possible to v dd pins for proper operation. in addition, v dd2 should have a 10 f tantalum capacitor connected in parallel with the 47 nf capacitor. dc correctness the IL3585 incorporates a patented refresh circuit which effectively maintains the correct output state with respect to data input. at power up, the bus outputs will follow the function table shown on page 1. it is recommended that the de input is always held low during power up to eliminate false drive data pulses from the bus. the use of an external power supply monitor to minimize glitches caused by slow power-up a nd power-down transients is not required. application information_______________________ receiver features the IL3585 receiver includes a ?fail-safe if open? function that guarantees a high level receiver output if the receiver inputs are unconnected (floating). IL3585 receiver outputs have tri-state capability via the active low re input. driver features the rs-485 driver is a differential output device that delivers at least 1.5 v across a 54 ? load. the drivers feature low propagation delay skew to maximize bit width and to minimize emi. the IL3585 drivers have tri-state capability via the active high de input. receiver data rate, cables and terminations this device is intended for netw ork lengths up to 4000', but the maximum system data rate decreases as the transmission line length increases. twisted pair cable should be used in all networks since they tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in these ics. .com .com .com .com
IL3585 7 nve corporation 11409 valley view road eden prairie, mn 55344-3617 usa telephone: ( 952) 829-9217 fax (952) 829- 9189 internet: www.isoloop.com IL3585 (0.3'' soic-16 package) ordering information and valid part numbers .com .com .com .com
IL3585 8 nve corporation 11409 valley view road eden prairie, mn 55344-3617 usa telephone: ( 952) 829-9217 fax (952) 829- 9189 internet: www.isoloop.com about nve an iso 9001 certified company nve corporation is a high technology components manufacturer ha ving the unique capability to combine leading edge giant magneto resistive (gmr) materials with integrated circuits to make high perform ance electronic components. products include magnetic field sensor s, magnetic field gradient sensors (gradiom eter), digital magnetic field se nsors, digital signal isolators and isolated bus transceivers. nve is a leader in gmr research and in 1994 introduced the world?s first products us ing gmr material, a line of gmr magnetic fi eld sensors that can be used for position, magnetic me dia, wheel speed and current sensing. nve is located in eden prairie, minnesota, a suburb of minn eapolis. please visit our web site at www.nve.com or call 952-829-92 17 for information on products, sales or distribution. nve corporation 11409 valley view road eden prairie, mn 55344-3617 usa telephone: (952) 829-9217 fax: (952) 829-9189 internet: www.nve.com e-mail: isoinfo@nve.com the information provided by nve corporati on is believed to be accurate. however, no responsibility is assumed by nve corporatio n for its use, nor for any infringement of patents, nor ri ghts or licenses granted to third parties, which may result from its use. no license is granted by implication, or otherwise, under any paten t or patent rights of nve corporation. n ve corporation does not authorize, nor warran t, any nve corporation product for use in life support d evices or systems or other critical applica tions. the use of nve corporation?s pr oducts in such applications is understood to be entir ely at the customer?s own risk. specifications shown are subject to change without notice. isb-ds-001-IL3585-b january 26, 2005 .com .com .com
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