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general description the MAX12930/max12931 are a family of 2-channel, 3.75kv/5kvrms digital galvanic isolators using maxims proprietary process technology. these devices transfer digital signals between circuits with different power domains while using as little as 0.65mw per channel at 1mbps with 1.8v. the two channels of the max12931 transfer data in opposite directions, and this makes the max12931 ideal for isolating the tx and rx lines of a transceiver. the MAX12930 features two channels transferring data in the same direction. both devices are available with a maximum data rate of either 25mbps or 150mbps and with the default outputs that are either high or low. the default is the state the output assumes when the input is not powered, or if the input is open-circuit. see the ordering information for suffixes associated with each option. independent 1.71v to 5.5v supplies on each side of the isolator also make the devices suitable for use as level translators. the MAX12930/max12931 are available in an 8-pin, narrow-body soic package. in addition, the max12931 is available in a 16-pin, wide-body soic package. the package material has a minimum comparative tracking index (cti) of 600v, which gives it a group 1 rating in creepage tables. all devices are rated for operation at ambient temperatures of -40c to +125c. benefts and features robust galvanic isolation of digital signals ? withstands 5kv rms for 60s (viso) wide-body ? withstands 3.75kv rms for 60s (viso) narrow- body ? continuously withstands 848v rms (viowm) wide-body ? continuously withstands 445v rms (viowm) narrow-body ? withstands 10kv surge between gnda and gndb with 1.2/50s waveform ? high cmti (50kv/s, typ) options to support a broad range of applications ? 2 data rates (25mbps/150mbps) ? 2 channel direction confgurations ? 2 output default states (high or low) low power consumption ? 1.3mw per channel at 1mbps with v dd = 3.3v ? 3.3mw per channel at 100mbps with v dd = 1.8v applications fieldbus communications for industrial automation isolated rs232, rs-485/rs-422, can general isolation application battery management medical systems ordering information appears at end of data sheet. 19-8563; rev 0; 6/16 functional diagrams max 12930 v dda in 1 in 2 gnda v ddb out 1 out 2 gndb max 12931 v dda out 1 in 2 gnda v ddb in 1 out 2 gndb MAX12930/max12931 two-channel digital isolators evaluation kit available
v dda to gnda ........................................................ -0.3v to +6v v ddb to gndb ........................................................ -0.3v to +6v in_ on side ato gnda ........................................... -0.3v to +6v in_ on side b to gndb ......................................... -0.3v to +6v out_ on side a to gnda ....................... -0.3v to v dda + 0.3v out_on side b to gndb ....................... -0.3v to v ddb + 0.3v short-circuit duration out_ on side a to gnda, out_ on side b to gndb ............................................................................... continuous continuous power dissipation (t a = +70c) wide soic (derate 14.1mw/c above +70c) ...... 1126.8mw narrow soic (derate 13.3mw/c above +70c) ..... 588.2mw operating temperature range ......................... -40c to +125c maximum junction temperature ..................................... +150c storage temperature range ............................ -60c to +150c soldering temperature (reflow) ....................................... +260c wide soic junction-to-ambient thermal resistance ( ja ) .......... 71c/w junction-to-case thermal resistance ( jc ) ............... 23c/w narrow soic junction-to-ambient thermal resistance ( ja ) ........ 136c/w junction-to-case thermal resistance ( jc ) ............... 38c/w (note 1) (v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (note 2) maxim integrated 2 note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to ab solute maximum rating conditions for extended periods may affect device reliability. package thermal characteristics dc electrical characteristics parameter symbol conditions min typ max units power supply supply voltage v dda relative to gnda 1.71 5.5 v v ddb relative to gndb 1.71 5.5 undervoltage-lockout threshold v uvlo_ v dd _ rising 1.5 1.6 1.66 v undervoltage-lockout threshold hysteresis v uvlo_hyst 45 mv MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (note 2) maxim integrated 3 dc electrical characteristics (continued) parameter symbol conditions min typ max units supply current (MAX12930_) (note 3) i dda 1mhz square wave, c l = 0pf v dda = 5v 0.32 0.58 ma v dda = 3.3v 0.31 0.54 v dda = 2.5v 0.3 0.53 v dda = 1.8v 0.29 0.39 12.5mhz square wave, c l = 0pf v dda = 5v 0.81 1.26 v dda = 3.3v 0.8 1.20 v dda = 2.5v 0.78 1.18 v dda = 1.8v 0.77 1.01 50mhz square wave, c l = 0pf v dda = 5v 2.15 3.00 v dda = 3.3v 2.09 2.91 v dda = 2.5v 2.06 2.88 v dda = 1.8v 2 2.62 i ddb 1mhz square wave, c l = 0pf v ddb = 5v 0.5 0.83 ma v ddb = 3.3v 0.47 0.79 v ddb = 2.5v 0.45 0.76 v ddb = 1.8v 0.4 0.67 12.5mhz square wave, c l = 0pf v ddb = 5v 1.37 1.83 v ddb = 3.3v 1.02 1.40 v ddb = 2.5v 0.87 1.22 v ddb = 1.8v 0.71 1.00 50mhz square wave, c l = 0pf v ddb = 5v 4.21 4.99 v ddb = 3.3v 2.81 3.39 v ddb = 2.5v 2.21 2.69 v ddb = 1.8v 1.69 2.04 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (note 2) maxim integrated 4 dc electrical characteristics (continued) parameter symbol conditions min typ max units supply current (max12931_) (note 3) i dda 1mhz square wave, c l = 0pf v dda = 5v 0.42 0.70 ma v dda = 3.3v 0.39 0.67 v dda = 2.5v 0.38 0.64 v dda = 1.8v 0.36 0.56 12.5mhz square wave, c l = 0pf v dda = 5v 1.07 1.52 v dda = 3.3v 0.89 1.29 v dda = 2.5v 0.81 1.19 v dda = 1.8v 0.73 1.03 50mhz square wave, c l = 0pf v dda = 5v 3.06 3.87 v dda = 3.3v 2.37 3.06 v dda = 2.5v 2.08 2.72 v dda = 1.8v 1.82 2.33 i ddb 1mhz square wave, c l = 0pf v ddb = 5v 0.42 0.70 ma v ddb = 3.3v 0.39 0.67 v ddb = 2.5v 0.38 0.64 v ddb = 1.8v 0.36 0.56 12.5mhz square wave, c l = 0pf v ddb = 5v 1.07 1.52 v ddb = 3.3v 0.89 1.29 v ddb = 2.5v 0.81 1.19 v ddb = 1.8v 0.73 1.03 50mhz square wave, c l = 0pf v ddb = 5v 3.06 3.87 v ddb = 3.3v 2.37 3.06 v ddb = 2.5v 2.08 2.72 v ddb = 1.8v 1.82 2.33 logic inputs and outputs input high voltage v ih 2.25v v dd_ 5.5v 0.7 x v dd_ v 1.71v v dd_ < 2.25v 0.75 x v dd_ input low voltage v il 2.25v v dd_ 5.5v 0.8 v 1.71v v dd_ < 2.25v 0.7 input hysteresis v hys max1293_b/e 410 mv max1293_c/f 80 input pullup current (note 4) i pu in_, max1293_b/c -10 -5 -1.5 a input pulldown current (note 4) i pd in_, max1293_e/f 1.5 5 10 a input capacitance c in in_, f sw = 1mhz 2 pf MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (note 2) (v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (notes 2,3) maxim integrated 5 dc electrical characteristics (continued) parameter symbol conditions min typ max units output voltage high (note 4) v oh i out = 4ma source v dd_ - 0.4 v output voltage low (note 4) v ol i out = 4ma sink 0.4 v dynamic characteristics max1293_b/e parameter symbol conditions min typ max units common-mode transient im - munity cmti in_ = gnd_ or v dd _ (note 5) 50 kv/s maximum data rate dr max 25 mbps minimum pulse width pw min 40 ns glitch rejection 10 17 29 ns propagation delay (figure 1) t plh 4.5v v dd_ 5.5v 17.4 23.9 32.5 ns 3.0v v dd_ 3.6v 17.6 24.4 33.7 2.25v v dd_ 2.75v 18.3 25.8 36.7 1.71v v dd_ 1.89v 20.7 29.6 43.5 t phl 4.5v v dd_ 5.5v 16.9 23.4 33.6 3.0v v dd_ 3.6v 17.2 24.2 35.1 2.25v v dd_ 2.75v 17.8 25.4 38.2 1.71v v dd_ 1.89v 19.8 29.3 45.8 pulse width distortion pwd 0.4 4 ns propagation delay skew part-to-part (same channel) t splh 4.5v v dd_ 5.5v 15.1 ns 3.0v v dd_ 3.6v 15 2.25v v dd_ 2.75v 15.4 1.71v v dd_ 1.89v 20.5 t sphl 4.5v v dd_ 5.5v 13.9 3.0v v dd_ 3.6v 14.2 2.25v v dd_ 2.75v 16 1.71v v dd_ 1.89v 21.8 propagation delay skew channel-to-channel (same direction) MAX12930 only t scslh 2 ns t scshl 2 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (notes 2,3) maxim integrated 6 dynamic characteristics max1293_b/e (continued) parameter symbol conditions min typ max units propagation delay skew channel-to-channel (opposite direction) max12931 only t scolh 2 ns t scohl 2 peak eye diagram jitter t jit(pk) 25mbps 250 ps rise time t r 4.5v v dd_ 5.5v 1.6 ns 3.0v v dd_ 3.6v 2.2 2.25v v dd_ 2.75v 3 1.71v v dd_ 1.89v 4.5 fall time t f 4.5v v dd_ 5.5v 1.4 ns 3.0v v dd_ 3.6v 2 2.25v v dd_ 2.75v 2.8 1.71v v dd_ 1.89v 5.1 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (notes 2,3) maxim integrated 7 dynamic characteristics max1293_c/f parameter symbol conditions min typ max units common-mode transient immunity cmti in_ = gnd_ or v dd _ (note 5) 50 kv/us maximum data rate dr max 150 mbps minimum pulse width pw min 2.25v v dd _ 5.5v 5 ns 1.71v v dd _ 1.89v 6.67 propagation delay (figure 1) t plh 4.5v v dd _ 5.5v 4.1 5.4 9.2 ns 3.0v v dd _ 3.6v 4.2 5.9 10.2 2.25v v dd _ 2.75v 4.9 7.1 13.4 1.71v v dd _ 1.89v 7.1 10.9 20.3 t phl 4.5v v dd _ 5.5v 4.3 5.6 9.4 3.0v v dd _ 3.6v 4.4 6.2 10.5 2.25v v dd _ 2.75v 5.1 7.3 14.1 1.71v v dd _ 1.89v 7.2 10.9 21.7 pulse width distortion pwd 0.3 2 ns propagation delay skew part-to-part (same channel) t splh 4.5v v dd_ 5.5v 3.7 ns 3.0v v dd_ 3.6v 4.3 2.25v v dd_ 2.75v 6 1.71v v dd_ 1.89v 10.3 t sphl 4.5v v dd_ 5.5v 3.8 3.0v v dd_ 3.6v 4.7 2.25v v dd_ 2.75v 6.5 1.71v v dd_ 1.89v 11.5 propagation delay skew channel-to-channel (same direction) MAX12930 only t scslh 2 ns t scshl 2 propagation delay skew channel-to-channel (opposite direction) max12931 only t scolh 2 ns t scohl 2 peak eye diagram jitter t jit(pk) 150mbps 90 ps MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v dda - v gnda = 1.71v to 5.5v, v ddb - v gndb = 1.71v to 5.5v, c l = 15pf, t a = -40c to +125c, unless otherwise noted. typical values are at v dda - v gnda = 3.3v, v ddb - v gndb = 3.3v, gnda = gndb, t a = 25c, unless otherwise noted.) (notes 2,3) note 2: all devices are 100% production tested at t a = +25c. specifications over temperature are guaranteed by design. note 3: not production tested. guaranteed by design and characterization, note 4: all currents into the device are positive. all currents out of the device are negative. all voltages are referenced to their respective ground (gnda or gndb), unless otherwise noted. note 5: cmti is the maximum sustainable common-mode voltage slew rate while maintaining the correct output. cmti applies to both rising and falling common-mode voltage sedges. tested with the transient generator connected between gnda and gndb (vcm = 1000v), maxim integrated 8 esd protection dynamic characteristics max1293_c/f (continued) parameter symbol conditions min typ max units rise time t r 4.5v v dd_ 5.5v 1.6 ns 3.0v v dd_ 3.6v 2.2 2.25v v dd_ 2.75v 3 1.71v v dd_ 1.89v 4.5 fall time t f 4.5v v dd_ 5.5v 1.4 ns 3.0v v dd_ 3.6v 2 2.25v v dd_ 2.75v 2.8 1.71v v dd_ 1.89v 5.1 parameter symbol conditions min typ max units esd human body model, all pins 3 kv MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
table 1. narrow soic insulation characteristic maxim integrated 9 insulation characteristics parameter symbol conditions value units partial discharge test voltage v pr method b1 = v iorm x 1.875 (t = 1s, partial discharge < 5pc) 1182 v p maximum repetitive peak isolation voltage v iorm (note 6) 630 v p maximum working isolation voltage v iowm continuous rms voltage (note 6) 445 v rms maximum transient isolation voltage v iotm t = 1s 6000 v p maximum withstand isolation voltage v iso f sw = 60hz, duration = 60s (note 7) 3750 v rms maximum surge isolation voltage v iosm basic insulation, 1.2/50s pulse per iec61000-4-5 10 kv insulation resistance r s t a = 150c, v io = 500v >10 9 ? barrier capacitance side a to side b cio f sw = 1mhz (note 8) 2 pf minimum creepage distance cpg narrow soic 4 mm minimum clearance distance clr narrow soic 4 mm internal clearance distance through insulation 0.015 mm comparative tracking index cti material group i (iec60112) >600 climate category 40/125/21 pollution degree (din vde 0110, table 1) 2 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
note 6: viso, viowm and viorm are defined by the iec 60747-5-5 standard. note 7: product is qualified viso for 60s. 100% production tested at 120% of viso for 1s. note 8: capacitance is measured with all pins on field-side and logic-side tied together. table 2. wide soic insulation characteristic maxim integrated 10 parameter symbol conditions value units partial discharge test voltage v pr method b1 = v iorm x 1.875 (t = 1s, partial discharge < 5pc) 2250 v p maximum repetitive peak isolation voltage v iorm (note 6) 1200 v p maximum working isolation voltage v iowm continuous rms voltage (note 6) 848 v rms maximum transient isolation voltage v iotm t = 1s 8400 v p maximum withstand isolation voltage v iso f sw = 60hz, duration = 60s (note 7) 5000 v rms maximum surge isolation voltage v iosm basic insulation, 1.2/50s pulse per iec61000-4-5 10 kv insulation resistance r s t a = 150c, v io = 500v >10 9 ? barrier capacitance side a to side b cio f sw = 1mhz (note 8) 2 pf minimum creepage distance cpg wide soic 8 mm minimum clearance distance clr wide soic 8 mm internal clearance distance through insulation 0.015 mm comparative tracking index cti material group i (iec60112) >600 climate category 40/125/21 pollution degree (din vde 0110, table 1) 2 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v vdda - v gnda = +3.3v, v vddb - v gndb = +3.3v, v gnda = v gndb , t a = +25c, unless otherwise noted.) figure 1. test circuit (a) and timing diagram (b) maxim integrated 11 v dda in 1 , in 2 gnda 50 % 50 % t splh t sphl v ddb out1 gndb 50% 50% t scshl v ddb out2 gndb 90% 10 % t r t f 50 % ( a ) v dda 0 . 1 f v dda 50? test source in _ gnda gndb v ddb 0 . 1 f v ddb c l out_ r l MAX12930 max12931 2 0 . 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e a s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a o th e r ch a nn el i s h igh m ax12930b / e t oc 01 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e a s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a o th e r ch a nn el i s h igh m ax12930 c / f t oc 02 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e a s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a o th e r ch a nn el i s h igh m ax12931b / e t oc 03 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
(v vdda - v gnda = +3.3v, v vddb - v gndb = +3.3v, v gnda = v gndb , t a = +25c, unless otherwise noted.) maxim integrated 12 typical operating characteristics (continued) 0 . 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e a s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a o th e r ch a nn el i s h igh m ax12931 c / f t oc 04 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 0p f, o th e r ch a nn el i s h igh , m ax12930b / e t oc 05 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 1 . 4 1 . 6 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 15p f, o th e r ch a nn el i s h igh , m ax12930b / e t oc 06 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 3 . 0 3 . 5 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 0p f, o th e r ch a nn el i s h igh , m ax12930 c / f t oc 07 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 00 0 0 . 50 0 1 . 00 0 1 . 50 0 2 . 00 0 2 . 50 0 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 15p f, o th e r ch a nn el i s h igh m ax12931b / e t oc 10 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 1 . 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 15p f, o th e r ch a nn el i s h igh , m ax12930 c / f t oc 08 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 5 1 . 0 1 . 5 2 . 0 2 . 5 3 . 0 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 0p f, o th e r ch a nn el i s h igh m ax12931 c / f t oc 11 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 0 5 1 0 1 5 2 0 2 5 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c = 0p f, o th e r ch a nn el i s h igh l m ax12931b / e t oc 09 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v 0 . 0 1 . 0 2 . 0 3 . 0 4 . 0 5 . 0 6 . 0 7 . 0 8 . 0 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 s u pp l y curr e n t ( m a ) d a t a r a te ( m bp s) s i d e b s u pp l y curr e n t vs . da t a ra t e dr i v i n g o n e ch a nn el o n s i d e a c l = 15p f, o th e r ch a nn el i s h igh m ax12931 c / f t oc 12 v dd a = 5 . 0 v v dd a = 3 . 3 v v dd a = 2 . 5 v v dd a = 1 . 8 v MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
maxim integrated 13 (v vdda - v gnda = +3.3v, v vddb - v gndb = +3.3v, v gnda = v gndb , t a = +25c, unless otherwise noted.) typical operating characteristics (continued) 0 . 0 3 . 0 6 . 0 9 . 0 1 2 . 0 1 5 . 0 - 5 0 - 2 5 0 2 5 5 0 7 5 1 0 0 1 2 5 p r o p a g a tion d el a y ( n s) te m pe r a t ur e ( c ) p r o p a g a t io n d e l a y vs . t empe ra t ur e v dd a = v dd b i n a to o u tb m ax1293_ c / f t oc 13 v dd a = 1 . 8 v v dd a = 2 . 5 v v dd a = 3 . 3 v v dd a = 5 . 5 v 1 5 2 0 2 5 3 0 3 5 - 5 0 - 2 5 0 2 5 5 0 7 5 1 0 0 1 2 5 p r o p a g a tion d el a y ( n s) te m pe r a t ur e ( c ) p r o p a g a t io n d e l a y vs . t empe ra t ur e v dd a = v dd b i n a to o u tb , m ax1293_b / e t oc 14 v dd a = 1 . 8 v v dd a = 2 . 5 v v dd a = 3 . 3 v v dd a = 5 . 5 v 0 . 0 5 . 0 1 0 . 0 1 5 . 0 2 0 . 0 2 5 . 0 3 0 . 0 3 5 . 0 1 . 5 2 . 5 3 . 5 4 . 5 5 . 5 p r o p a g a tion d el a y ( n s) v dd a v o l t a g e ( v ) p r o p a g a t io n d e l a y vs . v dd a v o lt a g e v dd b = 3 . 3 v i n a to o u tb t oc 15 m ax1293_b / e m ax1293_ c / f 0 . 0 5 . 0 1 0 . 0 1 5 . 0 2 0 . 0 2 5 . 0 3 0 . 0 3 5 . 0 1 . 5 2 . 5 3 . 5 4 . 5 5 . 5 p r o p a g a tion d el a y ( n s) v dd b v o l t a g e ( v ) p r o p a g a t io n d e l a y vs . v dd b v o lt a g e v dd a = 3 . 3 v i n a to o u tb t oc 16 m ax1293_ c / f m ax1293_b / e toc19 5ns/div minimum pulse width 1v/div max1293_c/f in__ out__ 1v/div 5ns pulse toc17 400mv/div eye diagram at 150mbps max12931c/f 1ns/div toc18 20ns/div minimum pulse width 1v/div max1293_b/e 40ns pulse in__ out__ 1v/div MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
maxim integrated 14 pin confgurations v ddb out1 out2 gndb 8 7 6 5 1 2 3 4 v dda in1 in2 gnda MAX12930 8-soic top view + v ddb in1 out2 gndb 8 7 6 5 1 2 3 4 v dda out1 in2 gnda max12931 8-soic + max12931 + w-16 soic n.c. 2 n.c. gndb 1 gnda in1 4 out1 v ddb 3 v dda n.c. 6 n.c. out2 5 in2 gndb 9 8 n.c. n.c. 10 7 gnda 11 12 13 14 15 16 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
maxim integrated 15 pin description pin name function reference MAX12930 8-pin soic max12931 8-pin soic max12931 16-pin soic 1 1 3 v dda power supply for side a. bypass v dda with a 0.1f ceramic capacitor to gnda. gnda 2 in1 logic input for channel 1 gnda - 2 4 out1 logic output of channel 1 gnda 3 3 5 in2 logic input for channel 2 gnda 4 4 1, 7 gnda ground reference for side a 5 5 9, 16 gndb ground reference for side b 6 6 12 out2 logic output of channel 2 gndb 7 out1 logic output of channel 1 gndb 7 13 in1 logic input for channel 1 gndb 8 8 14 v ddb power supply for side b. bypass v ddb with a 0.1f ceramic capacitor to gndb. gndb 2,6,8,10,11,15 n.c. not internally connected typical operating circuit max 12931 v dda out1 in2 gnda v ddb in1 out2 gndb 0.1f 2.5v micro controller 0.1f 3.3v v dd rxd a b transceiver y z txd gnd v dd rx tx gnd MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
detailed description the MAX12930/max12931 are a family of 2-channel digital isolators. the MAX12930 transfers digital signals between circuits with different power domain in one direction, which is convenient for applications such as digital i/o. the max12931 transfers digital signals in opposite directions, which is necessary for isolated rs-485 or other uart applications. devices available in the 8-pin narrow body soic package are rated for up to 3.75kv rms isolation voltage for 60 seconds and the device in the 16-pin wide body soic package is rated for up to 5kv rms . this family of digital isolators offers low-power operation, high electromagnetic interference (emi) immunity, and stable temperature performance through maxims proprietary process technology. the devices isolate different ground domains and block high-voltage/high-current transients from sensitive or human interface circuitry. devices are available with data rates from dc to 25mbps (b/e versions) or 150mbps (c/f versions). each device can be ordered with default-high or default-low outputs. the default is the state the output assumes when the input is not powered, or if the input is open circuit. the devices have two supply inputs (v dda and v ddb ) that independently set the logic levels on either side of device. v dda and v ddb are referenced to gnda and gndb, respectively. the MAX12930/max12931 family also features a refresh circuit to ensure output accuracy when an input remains in the same state indefinitely. digital isolation the device family provides galvanic isolation for digital signals that are transmitted between two ground domains. up to 630v peak of continuous isolation is supported in the narrow soic package and up to 1200v peak of continuous isolation is supported in the wide soic package. the devices withstand differences of up to 3.75kv rms in the 8-pin narrow soic package or 5kv rms in the 16-pin wide soic package for up to 60 seconds. level-shifting the wide supply voltage range of both v dda and v ddb allows the MAX12930/max12931 family to be used for level translation in addition to isolation. v dda and v ddb can be independently set to any voltage from 1.71v to 5.5v. the supply voltage sets the logic level on the corresponding side of the isolator. unidirectional channels each channel of the MAX12930/max12931 is unidirectional; it only passes data in one direction, as indicated in the functional diagram. each device features two unidirectional channels that operate independently with guaranteed data rates from dc up to 25mbps (b/e versions), or dc to 150mbps (c/f versions). the output driver of each channel is push-pull, eliminating the need for pullup resistors. the outputs are able to drive both ttl and cmos logic inputs. startup and undervoltage-lockout the v dda and v ddb supplies are both internally monitored for undervoltage conditions. undervoltage events can occur during power-up, power-down, or during normal operation due to a sagging supply voltage. when an undervoltage condition is detected on either supply, all outputs go to their default states regardless of the state of the inputs ( table 3 ). figure 2 through figure 5 show the behavior of the outputs during power-up and power-down. table 3. output behavior during undervoltage conditions maxim integrated 16 v in_ v vdda v vddb v outa_ v outb_ 1 powered powered 1 1 0 powered powered 0 0 x undervoltage powered default default x powered undervoltage default default MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
figure 2. undervoltage lockout behavior (max12931b/c high) figure 3. undervoltage lockout behavior (max12931e/f high) figure 4. undervoltage lockout behavior (max12931b/c low) figure 5. undervoltage lockout behavior (max12931e/f low) maxim integrated 17 2v/div 200s/div vdda vddb out_a out_b max12931_b/c input set to high 2v/div 200s/div vdda vddb out_a out_b max12931_e/f input set to high 2v/div 200s/div vdda vddb out_a out_b max12931_b/c input set to low 2v/div 2/div v v 2/ MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
application information power-supply sequencing the MAX12930/max12931 do not require special power supply sequencing. the logic levels are set independently on either side by v dda and v ddb . each supply can be present over the entire specified range regardless of the level or presence of the other supply. power-supply decoupling to reduce ripple and the chance of introducing data errors, bypass v dda and v ddb with 0.1f low-esr ceramic capacitors to gnda and gndb, respectively. place the bypass capacitors as close to the power supply input pins as possible. layout considerations the pcb designer should follow some critical recom - mendation in order to get the best performance from the design. keep the input/output traces as short as possible. avoid using vias to make low-inductance paths for the signals. have a solid ground plane underneath the high- speed signal layer. keep the area underneath the MAX12930/max12931 free from ground and signal planes. any galvanic or metallic connection between the field-side and logic- side defeats the isolation. maxim integrated 18 MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
+denotes a lead(pb)-free/rohs-compliant package. maxim integrated 19 ordering information chip information process: bicmos package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. part channel configuration data rate (mbps) default output isolation voltage (kv rms ) temp range pin-package MAX12930basa+* 2/0 25 high 3.75 -40c to 125c 8 narrow soic MAX12930casa+* 2/0 150 high 3.75 -40c to 125c 8 narrow soic MAX12930easa+* 2/0 25 low 3.75 -40c to 125c 8 narrow soic MAX12930fasa+* 2/0 150 low 3.75 -40c to 125c 8 narrow soic max12931basa+* 1/1 25 high 3.75 -40c to 125c 8 narrow soic max12931casa+* 1/1 150 high 3.75 -40c to 125c 8 narrow soic max12931easa+* 1/1 25 low 3.75 -40c to 125c 8 narrow soic max12931fasa+* 1/1 150 low 3.75 -40c to 125c 8 narrow soic max12931bawe+ 1/1 25 high 5.0 -40c to 125c 16 wide soic package type package code outline no. land pattern no. 8 narrow soic s8ms-22 21-0041 90-0096 16 wide soic w16ms-11 21-0042 90-0107 *future product, contact factory for availability MAX12930/max12931 two-channel digital isolators www.maximintegrated.com
? 2016 maxim integrated products, inc. 20 revision history revision number revision date description pages changed 0 6/16 initial release maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. MAX12930/max12931 two-channel digital isolators for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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