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isolated switch ing regulator with integrated feedback data sheet adum3070 rev. 0 information furnished by analog devices is believed to be accurate 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 prop erty of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ? 2012 analog devi ces, inc. all rights reserved. f eatures i solated pwm feedback with built in compensation primary side transformer driver for up to 2.5 w output power with 5 v input voltage regulated adjustable output: 3.3 v to 24 v up to 80% efficiency 200 khz to 1 mhz adjustable oscillator soft start function at power - up pulse - by - pulse overcurrent protection thermal shutdown 25 00 v rms isolation high common - mode transient immunity: >25 kv/s 16- lead qsop package high temperature operation: 105c applications power s upply start up bias and gate d rive s isolated sensor i nterface s process c ontrols functional block dia gram figure 1. general description the adum3070 1 isolator is a regulated dc - to - dc isolated power supply controller with an internal mosfet driver. the dc - to - dc controller has an internal isolated pwm feedback from the secondary side based on the i coupler? chip scale transformer technology and complete loop compensation. this eliminates the need to use an optocoupler for feedba ck and compensate s the loop for stability. the adum3070 isolator provides a more stable output voltage and hi gher efficiency compared to un regulated isolated dc - to - dc power suppl ies . the fully integrated feedback and loop compensation in a small qsop package provides a smaller form factor than any discrete solution. the regulated feedback provides a relatively flat efficiency curve over the full output power range. the adum3070 enables a dc - to - dc converter with a 3.3 v to 24 v isolated output voltage range from either a 5.0 v or a 3.3 v input voltage, with an output power of up to 2.5 w . 1 protected by u.s. patents 5,952,849; 6,873,065; and 7075 329 b2. other patents are pending. adum3070 10437-001 prima r y converter/ driver seconda r y controller interna l feedback v dd2 oc fb v reg v dd1 v iso v dda x2 x1 gnd 1 gnd 2 reg rect 5v notes 1. v dd1 is the power supply for the push-pull transformer. 2. v dda is the power supply of side 1 of the adum3070.
adum3070 data sheet rev. 0 | page 2 of 20 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 electrical characteristics 5 v primary input supply/5 v secondary isolated supply ........................................................... 3 electrical characteristics 3.3 v primary input supply/3.3 v secondary isolated supply ........................................................... 3 electrical characteristics 5 v primary input supply/3.3 v secondary isolated supply ........................................................... 4 electrical characteristics 5 v primary input supply/15 v secondary isolated supply ........................................................... 4 package charac teristics ............................................................... 5 regulatory approvals (pending) ................................................ 5 insulation and safety related specifications ............................ 5 din v vde v 0884 - 10 (vde v 0884 - 10) insulation characteristics .............................................................................. 6 recommended operating conditions ...................................... 6 absolute maximum ratings ............................................................ 7 esd caution .................................................................................. 7 pin configuration and function descriptions ..............................8 typical performance characteristics ..............................................9 applications information .............................................................. 14 application schematics ............................................................. 14 transformer design ................................................................... 15 transformer turns ratio ........................................................... 15 transfor mer et constant ......................................................... 15 transformer primary inductance and resistance ................. 15 transformer isolation voltage .................................................. 16 switching frequency .................................................................. 16 transient re sponse .................................................................... 16 component selection ................................................................ 16 printed circuit board (pcb) layout ....................................... 17 thermal analysis ....................................................................... 17 power consumption .................................................................. 17 power considerations ................................................................ 18 insulation lifetime ..................................................................... 18 outline dimensions ....................................................................... 19 ordering guide .......................................................................... 19 revision history 5 / 1 2 revision 0 : initial versi on
data sheet adum3070 rev. 0 | page 3 of 20 specifications electrical characteristics 5 v primary input su pply/5 v secondary i solated supply 4.5 v v dd1 = v dda 5.5 v , v dd2 = v reg = v iso = 5.0 v , f sw = 500 khz , all voltages are relative to their respective grounds , see the application schematic in figure 31 . all minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. all typical specifications are a t t a = 25c, v dd1 = v dda = 5.0 v, v dd2 = v reg = v iso = 5.0 v. table 1 . dc -to - dc converter static specifications parameter symbol min typ max unit test conditions /comments dc - to - dc converter supply isolated output voltage v iso 4.5 5. 0 5. 5 v i iso = 0 ma , v iso = v fb (r1 + r2)/r2 feedback voltage setpoint v fb 1.15 1.25 1.3 7 v i iso = 0 ma line regulation v iso (line) 1 10 mv/v i iso = 50 ma, v dd1 1 = v dda 2 = 4.5 v to 5.5 v load regulation v iso (load) 1 2 % i iso = 50 ma to 2 00 ma output ripple v iso (rip) 50 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma output noise v iso (noise) 1 00 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma switching frequency f sw 1000 k hz r oc = 50 k 200 khz r oc = 270 k 192 318 515 khz v o c = v dd2 (open - loop) i dda quiescent i dda (q) 4 5 ma switch on resistance r on 0.5 maximum output supply current i iso (max) 400 500 ma f 1 mhz, v iso = 5.0 v efficiency at max imum output current 70 % i iso = i iso (max) , f 1 mhz 1 v dd1 is the power supply for the push - pull transformer. 2 v dda is the power supply of side 1 of the adum3070 . electrical character istics 3.3 v primary input supp ly/ 3.3 v secondary isolated supply 3.0 v v dd1 = v dda 3.6 v , v dd2 = v reg = v iso = 3.3 v , f sw = 500 khz , all voltages are relative to their respective ground s , see the application schematic in figure 31. all min imum /max imum specifications apply over the entire recommended operating range, unless otherwise noted. all typical specifications are at t a = 25c, v dd1 = v dda = 3.3 v, v dd2 = v reg = v iso = 3.3 v. table 2 . dc -to - dc converter static specifications parameter symbol min typ max unit test conditions /comments dc - to - dc converter supply isolated output voltage v iso 3.0 3.3 3.6 3 v i iso = 0 ma, v iso = v fb (r1 + r2)/r2 feedback voltage setpoint v fb 1.15 1.25 1.3 7 v i iso = 0 ma line regulation v iso (line) 1 10 mv/v i iso = 50 ma, v dd1 1 = v dda 2 = 3.0 v to 3.6 v load regulation v iso (load) 1 2 % i iso = 50 ma to 200 ma output ripple v iso (rip) 50 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma output noise v iso (noise) 100 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma switching frequency f sw 1000 khz r oc = 50 k 200 khz r oc = 270 k 192 318 515 khz v o c = v dd2 (open - loop) i dda quiescent i dda (q) 2 3.5 ma switch on resistance r on 0.6 maximum output supply current i iso (max) 250 350 ma f 1 mhz, v iso = 3.3 v efficiency at m aximum output current 70 % i iso = i iso (max) , f 1 mhz 1 v dd1 is the power supply for the push - pull transformer. 2 v dda is the power supply of side 1 of the adum3070 .
adum3070 data sheet rev. 0 | page 4 of 20 electrical character istics 5 v primary input su pply/3.3 v secondary isolated supply 4.5 v v dd1 = v dda 5.5 v , v dd2 = v reg = v iso = 3.3 v , f sw = 500 khz , all voltages are relative to their respective ground s , see the application schematic in figure 31 . all minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. all typical specifications are at t a = 25c, v dd1 = v dda = 5.0 v, v dd2 = v reg = v iso = 3.3 v. table 3 . dc -to - dc converter static specifications parameter symbol min typ max unit test conditions /comments dc - to - dc converter supply isolated output voltage v iso 3.0 3.3 3.6 3 v i iso = 0 ma, v iso = v fb (r1 + r2)/r2 feedback voltage setpoint v fb 1.15 1.25 1.3 7 v i iso = 0 ma line regulation v iso (line) 1 10 mv/v i iso = 50 ma, v dd1 1 = v dda 2 = 4.5 v to 5.5 v load regulation v iso (load) 1 2 % i iso = 50 ma to 200 ma output ripple v iso (rip) 50 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma output noise v iso (noise) 100 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma switching frequency f sw 1000 khz r oc = 50 k 200 khz r oc = 270 k 209 318 515 khz v o c = v dd2 (open - loop) i dda quiescent i dda (q) 3.5 5 ma switch on resistance r on 0. 5 maximum output supply current i iso (max) 400 500 ma f 1 mhz, v iso = 3.3 v efficiency at maximum output current 70 % i iso = i iso (max) , f 1 m hz 1 v dd1 is the power supply for the push - pull transformer. 2 v dda is the power supply of side 1 of the adum3070 . electrical character istics 5 v primary input su pply/15 v secondary isolated supply 4.5 v v dd1 = v dda 5.5 v , v reg = v iso = 15 v , v dd2 = 5.0 v , f sw = 500 khz , all voltages are relative to their respective ground s, see the application schematic in figure 32 . all minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. all typical specifications are at t a = 25c, v dd1 = v dda = 5. 0 v, v reg = v iso = 15 v , v dd2 = 5.0 v. table 4 . dc -to - dc converter static specifications parameter symbol min typ max unit test conditions /comments dc - to - dc converter supply isolated output voltage v iso 13.8 15.0 16. 5 v i iso = 0 ma, v iso = v fb (r1 + r2)/r2 feedback voltage setpoint v fb 1.15 1.25 1.3 7 v i iso = 0 ma v dd2 linear regulator voltage v dd2 4. 5 5.0 5. 48 v v reg = 7 v to 15 v, i dd2 = 0 ma to 50 ma dropout voltage v dd2do 0.5 1.5 v i dd2 = 50 ma line regulation v iso (line) 1 10 mv/v i iso = 50 ma, v dd1 1 = v dda 2 = 4.5 v to 5.5 v load regulation v iso (load) 1 3 % i iso = 2 0 ma to 1 00 ma output ripple v iso (rip) 200 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma output noise v iso (noise) 5 00 mv p -p 20 mhz bandwidth, c out = 0.1 f||47 f, i iso = 100 ma switching frequency f sw 1000 khz r oc = 50 k 200 khz r oc = 270 k 192 318 515 khz v o c = v dd2 (open - loop) i dda quiescent i dda (q) 3.5 5 ma switch on resistance r on 0.5 maximum output supply current i iso (max) 100 140 ma f 1 mhz, v iso = 15.0 v efficiency at maximum output current 70 % i iso = i iso (max) , f 1 mhz 1 v dd1 is the power supply for the pu sh - pull transformer. 2 v dda is the power supply of side 1 of the adum3070 .
data sheet adum3070 rev. 0 | page 5 of 20 package characterist ics table 5 . parameter symbol min typ max unit test conditions /comments resistance r i- o 10 12 input to output 1 capa citance c i- o 2.2 pf f = 1 mhz input to output 1 thermal ic junction - to - ambient thermal resistance 2 ja 7 6 c /w thermal shutdown threshold ts sd 150 c t j rising h ysteresis ts sd - hys 20 c 1 the device is considered a 2 - terminal device: pin 1 to pin 8 is shorted together, and pin 9 to pin 16 is shorted together. 2 the t herm ocouple is located at the center of the package underside. regu la tory approvals (pending) table 6 . ul csa vde recognized under the ul 1577 component recognition 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 p rotection , 25 00 v rms isolation voltage basic insulation per csa 60950 -1 - 03 and iec 60950 - 1, 4 00 v rms ( 848 v peak) maximum working voltage reinforced insulation, 560 v peak file e214100 file 205078 file 2471900 - 4880 - 0001 1 in accordance with ul 1577, each adum 3070 is proof tested by applying an insulation test voltage of 3 000 v rms for 1 sec (current leakage detection limit = 10 a). 2 in accordance with din v vde v 0884 - 10 , each adum 3070 is proof tested by applying an insulation test voltage of 1050 v peak for 1 sec (partial discharge detection limit = 5 pc). the asterisk ( *) marking branded on the component designates din v vde v 0884 - 10 approval. insu lation and safety related specificatio ns table 7 . parameter symbol value unit test conditions /comments rated dielectric insulation voltage 250 0 v rms 1 - minute duration minimum external air gap (clearance) l(i01) > 3.8 mm measured from input terminals to output terminals along the printed circuit board ( pcb ) seating plane minimum external tracking (creepage) l(i02) > 3. 1 mm measured from input terminals to output terminals, shortest distance path along body minimum internal gap (internal clearance) 0.017 min mm d istance 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)
adum3070 data sheet rev. 0 | page 6 of 20 din v vde v 0884 - 10 (vde v 0884 - 10) insulation chara cteristics these isolators are suitable for reinforced electrical isolation only within the safety limit data. protective circuits ensure maintenance of the safety data . the asterisk ( * ) marking on packages denotes din v vde v 0884 - 10 approval. table 8 . parameter test conditions /comments 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 iii 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 560 v peak input - to - output test voltage, method b1 v iorm 1.875 = v pd (m ) , 100% production test, t ini = t m = 1 sec, partial discharge < 5 pc v pd (m) 1050 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 = 10 sec, partial discharge < 5 pc v pd (m) 840 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 = 10 sec, partial discharge < 5 pc v pd (m) 672 v peak highest allowable overvoltage v iotm 3500 v peak withstand isolation voltage 1 minute withstand rating v iso 2500 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 2 ) case temperature t s 150 c side 1 , side 2 p vdda , p vreg power dissipation p vdda , p vreg 1.65 w insulation resistance at t s v io = 500 v r s >10 9 figure 2 . thermal derating curve, dependence of safety limiting values on ambient temperature, per din v vde v 0884 - 10 recommended operatin g conditions table 9 . parameter symbol min max unit temperature operating temperature t a ? 40 + 105 c load minimum load i iso (min) 10 ma 0 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 1.8 0 50 100 150 200 ambient temperature (c) safe operating p vdda , p vreg power (ma) 10437-002
data sheet adum3070 rev. 0 | page 7 of 20 absolute maximum rat ings t a = 25c, unless otherwise noted. table 10. parameter rating storage temperature range (t st ) ? 55c to +150c ambient operating temperature range (t a ) ? 40c to +105c supply voltages v dda , v dd2 1 , 2 ? 0.5 v to +7.0 v v reg , x1, x2 1 ? 0.5 v to +20.0 v common - mode transients 3 ? 100 kv/s to +100 kv/s 1 all voltages are relative to their respective ground. 2 v dd1 is the power supply for the push - pull transformer, and v dda is the power supply of side 1 of the adum3070 . 3 refers to common - mode transients across the insulation barrier. common - mode transients exceeding the absolute maximum ratings may cause latch - up or permanent damage. stresses above those listed under a bsolute 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. expos ure to absolute maximum rating conditions for extended periods may affect device reliability. table 11 . maximum continuous working volt age supporting 50- year minimum lifetime 1 parameter max unit applicable certification ac voltage bipolar waveform 565 v peak 50- year minimum lifetime, all certifications unipolar waveform basic insulation 848 v peak working voltage per iec 60950 - 1 dc voltage basic insulation 848 v peak working voltage per iec 60950 - 1 1 refers to the continuous voltage magnitude imposed across the isolation barrier. see the insulation lifetime section for more information. esd caut ion
adum3070 data sheet rev. 0 | page 8 of 20 pin configuration an d function descripti ons figure 3 . pin configuration see application note an - 1109 for specific layout guidelines . table 12 . pin function descriptions pin o. mnemonic description 1 x1 transformer driver output 1. 2, 8 gnd 1 ground r eference for p rimary side . 3, 11, 12 nc no connect. do not connect to this pin. 5, 6 tp test point. do not connect to this pin. 4 x2 transformer driver output 2. 7 v dda primary supply voltage 3.0 v to 5.5 v. connect to v dd 1 . connect a 0.1 f bypass capacitor from v dda to gnd 1 . 9, 15 gnd 2 ground reference for secondary side . 10 oc oscillator control pin. when oc = logic high = v dd2 , the secondary controller runs open - loop . to regulate the output voltage, connect a resistor between the oc pin and gnd 2 , and the secondary controller runs at a frequency of 200 khz to 1 mhz, as programme d by the resistor value. 13 fb feedback input from the secondary output voltage v iso . use a resistor divider from v iso to the fb pin to make the v fb voltage equal to the 1.25 v internal reference level using the v iso = v fb (r1 + r2)/r2 formula. the resistor divider is required even in open - loop mode to provide soft start. 14 v dd2 internal supply voltage pin for the secondary side controller. when a sufficient external voltage is supplied to v reg , the internal regulator regulates the v dd2 pin to 5.0 v. otherwise, v dd2 should be in the 3.0 v to 5.5 v range. connect a 0.1 f bypass capacitor from v dd2 to gnd 2 . 16 v reg input of the internal regulator to power the secondary side controller. v reg should be in the 5.5 v to 15 v range to regulate the v dd2 output to 5.0 v. 1 2 3 4 5 6 7 8 16 15 14 13 12 1 1 10 9 *gnd 1 nc x2 v dda tp tp x1 gnd 2 * v dd2 fb oc *gnd 1 gnd 2 * nc nc v reg t op view (not to scale) adum3070 10437-003 * pin 2 and pin 8 are internally connected, and connecting both to gnd 1 is recommended. pin 9 and pin 15 are internally connected, and connecting both to gnd 2 is recommended. notes 1. nc = no connect. do not connect to this pin. 2. tp = test point. do not connect to this pin.
data sheet adum3070 rev. 0 | page 9 of 20 typical performance characteristics figure 4 . switching frequency (f sw ) vs. r oc resistance figure 5. typical efficiency at 5 v in to 5 v out at various switching frequencies with 1:2 coilcraft transformer (ja4631 - bl ) figure 6 . typical efficiency at 5 v in to 5 v out at various switching frequencies with 1:2 halo transformer (tgs ad - 260v6lf ) figure 7 . 5 v in to 5 v out efficiency over temperature with 1:2 coilcraft transformer (ja4631 - bl ) at 500 khz f sw figure 8 . single- supply efficiency with 1:2 coilcraft transformer (ja4631 - bl ) at 500 khz f sw figure 9 . typical efficiency at 3.3 v in to 5 v out at various switching frequencies with 1:3 halo transformer (tg s ad - 290v6lf) 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 0 50 100 150 200 250 300 350 400 450 500 f sw (khz) r oc (?) 10437-004 90 80 70 60 50 40 30 20 10 0 0 500 450 400 350 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-005 f sw = 1mhz f sw = 700khz f sw = 500khz f sw = 200khz 90 80 70 60 50 40 30 20 10 0 0 500 450 400 350 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-006 f sw = 1mhz f sw = 700khz f sw = 500khz f sw = 200khz 90 80 70 60 50 40 30 20 10 0 0 500 450 400 350 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-007 t a = ?40c t a = +25c t a = +105c 90 80 70 60 50 40 30 20 10 0 0 500 450 400 350 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-008 5v in to 5v out 5v in to 3.3v out 3.3v in to 3.3v out 80 70 60 50 40 30 20 10 0 0 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-033 f sw = 1mhz f sw = 700khz f sw = 500khz f sw = 200khz
adum3070 data sheet rev. 0 | page 10 of 20 figure 10 . typical efficiency at 3.3 v in to 5 v out over temperature with 1:3 halo transformer (tgsad - 290v6lf) at 500 khz f sw figure 11 . 5 v in to 15 v out efficiency at various switching frequencies with 1:3 coilcraft transformer (ja4650 - bl) figure 12 . 5 v in to 15 v out efficiency at various switching frequencies with 1:3 halo transformer (tgsad - 290v6lf) figure 13 . 5 v in to 15 v out efficiency over temperature with 1:3 coilcraft transformer (ja4650 - bl) at 500 khz f sw figure 14 . double- supply efficiency with 1:5 coilcraft transformer (ka4976 - al) at 500 khz f sw figure 15 . typical v iso startup at 5 v in to 5 v out with 10 ma, 50 ma, and 5 00 ma output load 80 70 60 50 40 30 20 10 0 0 300 250 200 150 100 50 efficiency (%) load current (ma) 10437-034 t a = ?40c t a = +25c t a = +105c 90 80 70 60 50 40 30 20 10 0 0 140 efficiency (%) load current (ma) 10437-009 10 20 30 40 50 60 70 80 90 100 110 120 130 f sw = 1mhz f sw = 700khz f sw = 500khz f sw = 200khz 90 80 70 60 50 40 30 20 10 0 0 140 efficiency (%) load current (ma) 10437-010 10 20 30 40 50 60 70 80 90 100 110 120 130 f sw = 1mhz f sw = 700khz f sw = 500khz f sw = 200khz 90 80 70 60 50 40 30 20 10 0 0 140 efficiency (%) load current (ma) 10437-011 10 20 30 40 50 60 70 80 90 100 110 120 130 t a = ?40c t a = +25c t a = +105c 80 0 0 70 efficiency (%) load current (ma) 10437-012 10 20 30 40 50 60 70 5 10 15 20 25 30 35 40 45 50 55 60 65 5v in to 12v out 5v in to 15v out 6 5 4 3 2 1 0 0 5 10 15 20 25 30 v iso (v) time (ms) 10437-013 load = 10ma load = 50ma load = 500ma
data sheet adum3070 rev. 0 | page 11 of 20 figure 16 . typical v iso startup at 5 v in to 3.3 v out with 10 ma, 50 ma, and 50 0 ma output load figure 17 . typical v iso startup at 3.3 v in to 3.3 v out with 10 ma, 50 ma, and 250 ma output load figure 18 . typical v iso startup at 5 v in to 15 v out with 10 ma, 20 ma, and 100 ma output load figure 19 . typical v iso load transient response , 5 v in to 5 v out at 10% to 90% of 5 00 ma load at 500 khz f sw figure 20 . typical v iso load transient response , 5 v in to 5 v out at 10% to 90% of 5 00 ma load at 500 khz f sw with 0.1 f feedback capacitor figure 21 . typical v iso load transient load response , 5 v in to 3.3 v out at 10% to 90% load of 5 00 ma load at 500 khz f sw 5 4 3 2 1 0 0 5 10 15 20 25 30 v iso (v) time (ms) 10437-014 load = 10ma load = 50ma load = 500ma 5 4 3 2 1 0 0 5 10 15 20 25 30 v iso (v) time (ms) 10437-015 load = 10ma load = 50ma load = 250ma 18 0 0 5 10 15 20 25 30 v iso (v) time (ms) 10437-016 load = 10ma load = 20ma load = 100ma 2 4 6 8 10 12 14 16 5.75 5.25 4.75 4.25 4.25 1.0 0.5 5.75 5.25 4.75 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-017 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 5.75 5.25 4.75 4.25 4.25 1.0 0.5 5.75 5.25 4.75 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-035 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 4.0 3.5 3.0 2.5 2.5 1.0 0.5 4.0 3.5 3.0 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-018 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h
adum3070 data sheet rev. 0 | page 12 of 20 figure 22 . typical v iso load transient load response , 5 v in to 3.3 v out at 10% to 90% load of 5 00 ma load at 500 khz f sw with 0.1 f feedback capacitor figure 23 . typical v iso load transient response , 3.3 v in to 3.3 v out at 10% to 90% of 250 ma load at 500 khz f sw figure 24 . typical v iso load transient response , 3.3 v in to 3.3 v out at 10% to 90% of 250 ma load at 500 khz f sw with 0.1 f feedback capacito r figure 25 . typical v iso load transient response , 5 v in to 15 v out at 10% to 90% of 100 ma load at 500 khz f sw figure 26 . typical v iso load transient response , 5 v in to 15 v out at 10% to 90% of 100 ma load at 500 khz f sw with 0.1 f feedback capacitor figure 27 . typical v iso output ripple , 5 v in to 5 v out at 5 00 ma load at 500 khz f sw 4.0 3.5 3.0 2.5 2.5 1.0 0.5 4.0 3.5 3.0 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-036 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 4.0 3.5 3.0 2.5 2.5 1.0 0.5 4.0 3.5 3.0 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-019 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 4.0 3.5 3.0 2.5 2.5 1.0 0.5 4.0 3.5 3.0 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-037 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 18 16 14 12 12 200 100 18 16 14 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-020 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 18 16 14 12 12 200 100 18 16 14 0 ?2 0 2 4 6 8 10 12 14 v iso (v) i load (a) time (ms) 10437-038 90% load 10% load c out = 47f, l1 = 100h c out = 47f, l1 = 47h 10437-021 20 10 0 ?2 v iso (v) x1 (v) time ( s) 4.94 4.98 5.02 5.06 ?1 0 1 2
data sheet adum3070 rev. 0 | page 13 of 20 figure 28 . typical v iso output ripple , 5 v in to 3.3 v out at 5 00 ma load at 500 khz f sw figure 29 . typical v iso output ripple , 3.3 v in to 3.3 v o ut at 250 ma load at 500 khz f sw figure 30 . typical v iso output ripple , 5 v in to 15 v out at 100 ma load at 500 khz f sw 10437-022 20 10 0 ?2 v iso (v) x1 (v) time ( s) 3.24 3.28 3.32 3.36 ?1 0 1 2 10437-023 20 10 0 ?2 v iso (v) x1 (v) time ( s) 3.24 3.28 3.32 3.36 ?1 0 1 2 10437-024 20 10 0 ?2 v iso (v) x1 (v) time ( s) 14.94 14.96 14.98 15.00 15.02 15.04 15.06 15.08 ?1 0 1 2
adum3070 data sheet rev. 0 | page 14 of 20 applications informa tion the dc - to - dc converter section of the adum 30 7 0 uses a secondary side contr oller architecture with isolated pulse - width modulation (pwm) feedback. v dd1 power is supplied to an oscillating circuit that switches current to the primary side of an external power transformer using internal push - pull switches at the x1 and x2 pins. pow er transferred to the secondary side of the transformer is full - wave rectified with external schottky diodes (d1 and d2), filtered with the l1 inductor and c out capacitor, and regulated to the isolated power supply voltage from 3.3 v to 15 v. t h e secondary (v iso ) side controller regulates the output by using a feedback voltage v fb from a resistor divider on the output and creating a pwm control signal that is sent to the primary (v cc ) side by a dedicated i coupler data channel labeled v fb . the prima ry side pwm converter varies the duty cycle of the x1 and x2 switches to modulate the oscillator circuit and control the power being sent to the secondary side. this feedback allows for significantly higher power and efficiency. the adum 30 7 0 implement s undervoltage lockout (uvlo) with hysteresis on the v dd1 power input. this feature ensures that the converter does enter oscillation due to noisy input power or slow power - on ramp rates. a minimum load current of 10 ma is recommended to ensure optimum load regulation. smaller loads can generate excess noise on the output because of short or erratic pwm pulses. excess noise generated from smaller loads can cause regulation problems , in some circumstances . application schemati cs the adum 30 7 0 has three main application schematics, as shown in figure 31 to figure 33. figure 31 has a center - tapped secondary and two schottky diodes providing full wave rectification for a single output, typically for power supplies of 3.3 v, 5 v, 12 v, and 15 v. for single supplies when v iso = 3.3 v or v iso = 5 v, see the note in figure 31 about connecting together v reg , v dd2 , and v iso . figure 32 is a vo ltage doubling circuit that can be used for a single supply whose output exceeds 15 v, which is the largest supply that can be connected to the regulator input , v reg (pin 16 ) , of the part . with figure 32 , the output voltage can be as high as 24 v and the v reg pin is only about 12 v. when using the circuit shown in figure 32, to obtain an output voltage lower than 10 v ( f or example, v dd1 = 3 .3 v, v iso = 5 v), connect v reg to v iso directly. figure 33, which also uses a voltage doubling secondary circuit , is shown as an example of a coarsely regulated, positive power supply and an unregulated, negative power supply for outputs of approxima tely 5 v, 12 v, and 15 v. for any circuit in figure 31 , figure 32 , or figure 33 , the isolated output voltage (v iso ) can be set using the voltage dividers, r1 and r2 (values 1 k? to 100 k?), using the following equation: r2 r2 r1 v v fb iso + = where v fb is the internal f eedback voltage, which is approximately 1.25 v. figure 31 . single power supply figure 32 . doubling power supply iure poitie and nreuated eatie su 10437-025 adum3070 1 x1 2 gnd 1 3 nc 4 x2 5 tp 6 tp 7 v dda 8 gnd 1 16 v reg 15 gnd 2 14 v dd2 13 fb 12 nc 11 nc 10 oc 9 gnd 2 d1 t1 l1 47h c out 47f d2 v dd1 v dd1 v dd1 0.1f c in 0.1f +5v r1 r2 r oc n? v fb c fb v iso = v fb (r1 + r2)/r2 for v iso = 3.3v or 5v connect v reg , v dd2 , and v iso . v iso = +3.3v to +15v 10437-026 adum3070 d1 t1 l1 47h l2 47h c out1 47f c out2 47f d2 d3 d4 v dd1 v dd1 0.1f c in 0.1f +5v r1 r2 v fb r oc n? v iso = v fb (r1 + r2)/r2 for v iso = 15v or less, v reg can connect t o v iso . v iso = +12v to +24v unregulated +6v to +12v v dd1 1 x1 2 gnd 1 3 nc 4 x2 5 tp 6 tp 7 v dda 8 gnd 1 16 v reg 15 gnd 2 14 v dd2 13 fb 12 nc 11 nc 10 oc 9 gnd 2 c fb 10437-027 adum3070 1 x1 2 gnd 1 3 nc 4 x2 5 tp 6 tp 7 v dda 8 gnd 1 16 v reg 15 gnd 2 14 vdd2 13 fb 12 nc 11 nc 10 oc 9 gnd 2 d1 t1 l1 47h l2 47h c out1 47f c out2 47f d2 d3 d4 v dd1 v dd1 0.1f c in 0.1f +5v r1 r2 r oc n? v fb v iso = v fb (r1 + r2)r2 v iso = coarsely regulated +5v to 15v unregulated ?5v to ?15v v dd1 c fb
data sheet adum3070 rev. 0 | page 15 of 20 transformer design transformers have been designed for use in the circuits shown in figure 31 , figure 32 , and figure 33 and are listed in table 13. the design of a transformer for the adum 307 0 can differ from some isolated dc - to - dc converter designs that do not regulate the output voltage. the output voltage is regulated by a pwm controller in the adum 30 7 0 that varies the duty cycle of the primary side switches in response to a secondary side feedback voltage, v fb , received through an isolated digital channel. the inte rnal controller has a limit of 40% maximum duty cycle. transformer turns ra tio to determine the transformer turns ratio, and taking into account the losses for the primary switches and the losses for the secondary diodes and inductors, the external transf ormer turns ratio for the adum 30 7 0 can be calculated by 2 + = d v v v n n (min) dd1 d iso p s where: n s / n p is the primary to secondary turns ratio. v iso is the isolated output supply voltage. v d is the schottky diode voltage drop (0.5 v maximum). v dd1 (min) is the minimum input supply voltage. d is the duty cycle = 0.30 for a 30% typical duty cycle, 40% is maximum, and a multiplier factor of 2 is used for the push - pull switching cycle. for figure 31 , the 5 v to 5 v reference design in table 13, with v dd1 (min ) = 4.5 v, the turns ratio is n s /n p = 2. for a similar 3.3 v input to 3.3 v output , isolated single power supply and with v dd1 (min) = 3.0 v, the turns ratio is also n s /n p = 2. therefore, the same transformer turns ratio n s /n p = 2 can be used for the three single power applications (5 v to 5 v, 5 v to 3.3 v, and 3.3 v to 3.3 v). for figure 32 , the circuit uses double windings and diode pai rs to create a doubler circuit; therefore, half the output voltage, v iso /2, is used in the equation. 2 2 + = d v v v n n (min) dd1 d iso p s n s / n p is the primary to secondary turns ratio. v iso /2 is used in the equation because the circuit uses two pairs of diodes creating a doubler circuit. v d is the schottky diode voltage drop (0.5 v maximum). v dd1 (min) is the minimum input supply voltage. d is the duty cycle, which is 0.30 for a 30% typical duty cycle and 0.40 for a 40% maximum duty cycle, and a multiplier factor of two is used for the push - pull switching cycle. for figure 32 , the 5 v to 15 v reference design in table 13, with v dd1 (min) = 4.5 v, results in a turns ratio of n s /n p = 3. for figure 33 , the circuit also uses double windings and diode pairs to create a doubler circuit; however, because a positi ve and negative output voltage is created, v iso is used in the equation. 2 + = d v v v n n (min) dd1 d iso p s where: n s / n p is the primary to secondary turns ratio. v iso is the isolated output supply voltage and is used in the equation because the circuit uses two pairs of diodes creating a doubler circuit with a positive and negative output. v d is the schottky diode voltage drop (0.5 v maximum). v dd1 (min) is the minimum input supply voltage, and a multiplier factor of 2 is used for the push - pull switching cycle. d is the duty cycle; in this case, a higher duty cycle of d = 0.35 for a 35% typical duty cycle (40% maximum duty cycle ) was used in the figure 33 circuit to reduce the maximum voltages seen by the diodes for a 15 v supply. for figure 33 , the +5 v to 15 v reference design in table 13, with v dd1 (min) = 4.5 v, results in a turns ratio of n s / n p = 5. transformer et const ant the next transformer design factor to consider is the et constant. this constant determines the minimum v s constant of the transformer over the operating temperature. et values of 14 v s and 18 v s were sel ected for the adum 30 7 0 designs listed in table 13 using the following equation: 2 ) ( ) ( = min sw (max) dd1 f v min et where: v dd1 (max) is the maximum input supply voltage. f sw (min ) is the minimum primary switching frequency = 300 khz in startup, and a multiplier factor of 2 is used for the push - pull switching cycle. transformer primary inductance and resistance another important charact eristic of the transformer for designs with the adum 30 7 0 is the primary inductance. transformers for the adum 30 7 0 are recommended to have between 60 h to 100 h of i nductance per primary winding. values of primary inductance in this range are needed for smooth operation of the adum 307 0 pulse - by - pulse current - limit circuit, which can help protect against build up of saturati on currents in the transformer. if the inductance is specified for the total of both primary windings, for example, as 400 h, the inductance of one winding is ? of two equal windings, or 100 h. another important characteristic of the transformer for desi gns with the adum 30 7 0 is primary resistance. primary resistance as low as is practical (less than 1 ?) helps reduce losses and improves efficiency. the total primary resistance can be measured and specified, and is shown for the transformers in table 13.
adum3070 data sheet rev. 0 | page 16 of 20 table 13. transformer reference designs part no. manufacturer turns ratio, pri:sec et constant (v s min) total primary inductance (h) total primary resistance () isolation voltage (rms) isolation type reference ja4631 - bl coilcraft 1ct:2ct 18 255 0.2 2500 basic figure 31 ja4650 - bl coilcraft 1ct:3ct 18 255 0.2 2500 basic figure 32 ka4976 - al coilcraft 1ct:5ct 18 255 0.2 2500 basic figure 33 tgsad - 260v6lf halo electronics 1ct:2ct 14 389 0.8 2500 supplemental figure 31 tgsad - 290v6lf halo electronics 1ct:3ct 14 389 0.8 2500 supplemental figure 32 tgsad - 292v6lf halo electronics 1ct:5ct 14 389 0.8 2500 supplemental figure 33 tgad - 260narl halo electronics 1ct:2ct 14 389 0.8 1500 functional figure 31 tgad - 290narl halo electronics 1ct:3ct 14 389 0.8 1500 functional figure 32 tgad - 292narl halo electronics 1ct:5ct 14 389 0.8 1500 functional figure 33 transformer isolatio n voltage isolation voltage and isolation type should be determined for the requirements of the application and then specified. the transformers in table 13 have been specified for 2500 v rms for supplemental or basic isolation and for 1500 v rms for functional isolation. other isolation levels and isolation voltages can be specified and requested from the manufacturers that are listed in table 13 or from other manufacturers. switching frequency the adum 30 7 0 switching frequency can be adjusted from 200 khz to 1 mhz by changing the value of the r oc resistor shown in figure 31, figure 32 , and figure 33 . the value of the r oc resistor needed for the desired switching frequen cy can be determined from the switching frequency vs. r oc resistance curve shown in figure 4 . the output filter inductor value and output ca pacitor value for the adum 307 0 application schematics have been designed to be stable over the switching frequency range from 500 khz to 1 mhz, when loaded from 10% to 90% of the maximum load. the adum 30 7 0 also has an open - loop mode where the output voltage is not regulated and is dependent on the transformer turns ratio, n s /n p , and the conditions of the output including output load current and the losses in the dc - to - dc converter circuit. this open - loop mode is selected when the oc pin is connected high to the v dd2 pin. in open - loop mode, the switching frequency is 318 khz . transient response the load transient response of the output voltage of the adum 30 7 0 for 10% to 90% of the full load is shown in figure 19 to figure 26 for the application schematics in figure 31 and figure 32 . the response shown is slow but stable and can have more output change than desired for some applications. the output voltage change with load transient has been reduced, and the output has been shown to remain stable by adding more inductance to the output circuits, as shown in the second v iso output waveform in figure 19 to figure 26. for additional improvement in transient respons e, add a 0.1 f ceramic capacitor (c fb ) in parallel with the high feedback resistor. as shown in figure 19 to figure 26 , this value helps reduce the overshoot and undershoot during load transients. component s election power supply bypassing is required at the input and output supply pins. note that a low esr ceramic bypass capacitor of 0.1 f is required on side 1 between pin 7 and pin 8 , and on side 2 between pin 1 4 and pin 1 5 , as close to the chip pads as pos sible. the power supply section of the adum 307 0 uses a high oscillator frequency to efficiently pass power through the external power transformer. bypass capacitors are required for several operating frequencies. noise suppression requires a low inductance, high frequency capacitor; ripple suppression and proper regulation require a large value capacitor. to suppress noise and reduce ripple, large valued ceramic capacitors of x5r or x7r dielectric typ e are recommended. the recommended capacitor value is 10 f for v dd1 and 47 f for v iso . these capacitors have a low esr and are available in moderate 1206 or 1210 sizes for voltages up to 10 v. for output voltages larger than 10 v, two 22 f ceramic capac itors can be used in parallel. see table 14 for recommended components. inductors must be selected based on the value and supply current needed. most applications with switching frequencies between 500 khz and 1 mhz and load transients between 10% and 90% of full load are stable with the 47 h inductor value listed in table 14 . values as large as 200 h can be used for power supply applications with a switching frequency as low as 200 khz to help stabilize the output voltage or for improved load transient response (see figure 19 to figure 26 ). inductors in a small 1212 or 1210 size are listed in table 14 with a 47 h value and a 0.41 a current rating to handle the majority of applications below a 400 ma lo ad, and with a 100 h value and a 0.34 a current rating to handle a load to 300 ma. schottky diodes are recommended for their low forward voltage to reduce losses and their high reverse voltage of up to 40 v to withstand the peak voltages available in the doubling circuit shown in figure 32 and figure 33 .
data sheet adum3070 rev. 0 | page 17 of 20 table 14 . recommended components part numb er manufacturer value grm32er71a476ke15l murata 47 f, 10 v, x7r, 1210 grm32er71c226kea8l murata 22 f, 16 v, x7r, 1210 grm31cr71a106ka01l murata 10 f, 10 v, x7r, 1206 mbr0540t1 / d on semiconductor 0.5 a, 40 v, schottky, sod - 123 lqh3npn470mm0 murata 47 h, 0.41 a, 1212 me3220 - 104kl coilcraft 100 h, 0.34 a, 1210 printed circuit boar d (pcb) layout note that the total lead length between the ends of the low esr capacitor and the v ddx and gnd x pins must not exceed 2 mm . see figure 34 for the recommended pcb layout. figure 34 . recommended pcb layout in applications involving high common - mode transients, ensure t hat board coupling across the isolation barrier is minimized. furthermore, design the board layout such that any coupling t hat does occur equally affects all pins on a given component side. failure to ensure this can cause voltage differentials between pin s, exceeding the absolute maximum ratings specified in table 10, thereby leading to latch - up and/or permanent damage. the adum 30 7 0 is a power device that dissipates about 1 w of power when fully loaded. because it is not possible to apply a heat sink to an isolation device, the device primarily depends on heat dissipation into the pcb through the gnd x pins. if the device is used at high ambient temperatures, care must be taken to provide a thermal path from the gnd x pins to the pcb ground plane. the board layout shows enlarged pads for the gnd x pins (pin 2 and pin 8) on side 1 and (pin 9 and pin 15) o n side 2. implement large diameter vias from the pad to the ground planes and power planes to increase thermal conductivity and to reduce inductance. multiple vias in the thermal pads can significantly reduce temperatures inside the chip. the dimensions of the expanded pads are left to the discretion of the designer and the available board space. thermal analysis the adum 30 7 0 parts consist of two internal die attached to a split lead frame with two die attach paddles. for the purposes of thermal analysis, the die is treated as a thermal unit, with the highest junction temperature reflected in the ja from table 5 . the valu e of ja is based on measurements taken with the device s mounted on a jedec standard, 4 - layer board with fine width traces and still air. under normal operating conditions, the adum 307 0 devices operate at full load across the full temperature range without derating the output current. however, following the recommendations in the printed circuit board (pcb) layout section decreases thermal resistance to the pcb, allowing increased thermal margins in high ambient temperatures. the adum 30 7 0 has a thermal shutdown circuit that shuts down the dc - to - dc converter of the adum 30 7 0 when a die temperature of about 160c is reached. when the die cools below about 140c, the adum 307 0 dc - to - dc converter turn s on again. power consumption the total input supply current is equal to the sum of the i dd1 primary transformer current and the adum 307 0 input current , i dda . the following relationship allows the total i in current to be: i in = ( i iso v iso ) /( e v dd1 ) (1) where: i in is the total supply input current. i iso is the current drawn by the secondary side external load. e is the power supply efficiency at the given output load from figure 8 or figure 14 at the v iso and v dd1 condition of interest. figure 35 . supply currents x1 x2 nc tp tp nc nc gnd 1 gnd 1 v reg gnd 2 v dd2 fb v dda oc gnd 2 10437-028 adum3070 10437-029 primary converter/ driver secondary controller internal feedback v dd2 oc fb v reg v dd1 i dd1 i in v iso i iso v dda i dda x2 x1 gnd1 gnd2 reg rect 5v notes 1. v dd1 is the power supply for the push-pull transformer. 2. v dda is the power supply of side 1 of the adum3070.
adum3070 data sheet rev. 0 | page 18 of 20 power considerations soft start mode and current - limit protection when the adum 307 0 first receives power from v dd1 , it is in soft start mode, and the output voltage , v iso , is increased gradually while it is below the startup threshold. in soft start mode, to limit the peak current during v iso power - up, the primary converter gradually inc reases the width of the pwm signal. when the output voltage is larger than the start - up threshold, the pwm signal can be transferred from the secondary controller to the primary converter, and the dc - to - dc converter switches from soft start mode to the nor mal pwm control mode . if a short circuit occurs, the push - pull converter shuts down for about 2 ms and then enters soft start mode. if, at the end of soft start, a short circuit still exists, the process is repeated, which is called hiccup mode. if the sho rt circuit is cleared, the adum 307 0 enters normal operation. the adum 307 0 has a pulse - by - pulse current limit , which is active at startup and during normal operation, that protect s the primary switches, x1 and x2, from exceeding approximately 1. 3 a peak , protect ing the transformer windings. insulation lifetime all insulation structures eventually break down when subjected to voltage stress over a sufficiently long peri od. the rate of insulation degradation is dependent on the characteristics of the voltage waveform applied across the insulation. analog devices, inc., conducts an extensive set of evaluations to determine the lifetime of the insulation structure within th e adum 307 0 . accelerated life testing is performed using voltage levels higher than the rated continuous working voltage. acceleration factors for several operating conditions are determined, allowing calculation of the time to failure at the working voltage of inter est. the values shown in table 11 summarize the peak voltages for 50 years of service life in several operating conditions. in many cases, the workin g voltage approved by agency testing is higher than the 50- year service life voltage. operation at working voltages higher than the service life voltage listed leads to premature insulation failure. the insulation lifetime of the adum 307 0 depends on the voltage waveform type imposed across the isolation barrier. the i coupler insulation structure degrades at different rates, depending on whether the waveform is bipolar ac, dc, or unipolar ac. figure 36 , figure 37 , and figure 38 illustrate these different isolation voltage waveforms. bipolar ac voltage is the m ost stringent environment. a 50 - year operating lifetime under the bipolar ac 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 al lows operation at higher working voltages while still achieving a 50 - year service life. the working voltages listed in table 11 can be applied while maintaining the 50- year minimum lifetime, if the voltage conforms to either the unipolar ac or dc voltage cases. treat any cross - insulation voltage waveform that does not conform to figure 37 or figure 38 as a bipolar ac waveform, and limit its peak voltage to the 50 - year lifetime voltage value listed in table 11 . figure 36 . bipolar ac waveform figure 37 . dc waveform figure 38 . unipolar ac waveform 0v rated peak voltage 10437-030 0v rated peak voltage 10437-031 0v rated peak voltage 10437-032 notes 1. the vo lt age is shown sinusoida l for illustr a tion purposes on l y . it is meant t o represent an y vo lt age w a veform v ar ying between 0 and some limiting v alue. the limiting v alue can be positive or neg a tive, but the vo lt age cannot cross 0 v .
data sheet adum3070 rev. 0 | page 19 of 20 outline dimensions figure 39 . 16 - lead s hrink small outline package [ qsop ] (r q - 16 ) dimension shown in inches and ( millimeters ) ordering guide model 1 , 2 temperature range package description package option adum 30 70ar q z ? 40c to +105c 16- lead shrink small outline package [qsop] r q - 16 eval - adum3070ebz evaluation board 1 tape and reel are available. the addition of an - rl 7 suffix designates a 7 ( 10 00 units ) tape and reel option . 2 z = rohs compliant part. compliant t o jedec st andards mo-137-ab controlling dimensions are in inches; millimeter dimensions (in p arentheses) are rounded-off inch equiv alents for reference onl y and are not appropria te for use in design. 16 9 8 1 s e a t i n g p l a n e 0 . 0 1 0 ( 0 . 2 5 ) 0 . 0 0 4 ( 0 . 1 0 ) 0 . 0 1 2 ( 0 . 3 0 ) 0 . 0 0 8 ( 0 . 2 0 ) 0 . 0 2 5 ( 0 . 6 4 ) b s c 0 . 0 4 1 ( 1 . 0 4 ) r e f 0 . 0 1 0 ( 0 . 2 5 ) 0 . 0 0 6 ( 0 . 1 5 ) 0 . 0 5 0 ( 1 . 2 7 ) 0 . 0 1 6 ( 0 . 4 1 ) 0 . 0 2 0 ( 0 . 5 1 ) 0 . 0 1 0 ( 0 . 2 5 ) 8 0 coplanarity 0.004 (0.10) 0 . 0 6 5 ( 1 . 6 5 ) 0 . 0 4 9 ( 1 . 2 5 ) 0 . 0 6 9 ( 1 . 7 5 ) 0 . 0 5 3 ( 1 . 3 5 ) 0 . 1 9 7 ( 5 . 0 0 ) 0 . 1 9 3 ( 4 . 9 0 ) 0 . 1 8 9 ( 4 . 8 0 ) 0 . 1 5 8 ( 4 . 0 1 ) 0 . 1 5 4 ( 3 . 9 1 ) 0 . 1 5 0 ( 3 . 8 1 ) 0 . 2 4 4 ( 6 . 2 0 ) 0 . 2 3 6 ( 5 . 9 9 ) 0 . 2 2 8 ( 5 . 7 9 ) 01-28- 2008-a
adum3070 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. d10437 - 0 - 5/12(0)

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