Hot Swappable, Dual I2C Isolators, 5 kV Data Sheet ADuM2250/ADuM2251 FEATURES GENERAL DESCRIPTION Bidirectional I2C communication The ADuM2250/ADuM22511 are hot swappable digital isolators Open-drain interfaces with nonlatching, bidirectional communication channels that Suitable for hot swap applications are compatible with I2C interfaces. This eliminates the need for 30 mA current sink capability splitting I2C signals into separate transmit and receive signals for 1000 kHz operation use with standalone optocouplers. 3.0 V to 5.5 V supply/logic levels The ADuM2250 provides two bidirectional channels, supporting 16-lead SOIC wide body package version (RW-16) a complete isolated I2C interface. The ADuM2251 provides one 16-lead SOIC wide body enhanced creepage version (RI-16-2) bidirectional channel and one unidirectional channel for those High temperature operation: 105°C applications where a bidirectional clock is not required. Safety and regulatory approvals UL recognition: 5000 V rms for 1 minute per UL 1577 The ADuM2250/ADuM2251 contain hot swap circuitry to CSA Component Acceptance Notice 5A (RI-16-2 package) prevent data glitches when an unpowered card is inserted onto IEC 60601-1: 250 V rms (reinforced) an active bus. IEC 60950-1: 400 V rms (reinforced) These isolators are based on iCoupler® chip scale transformer VDE certificate of conformity technology from Analog Devices, Inc. iCoupler is a magnetic DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 isolation technology with performance, size, power consump- VIORM = 849 V peak tion, and functional advantages compared to optocouplers. The Qualified for automotive applications ADuM2250/ADuM2251 integrate iCoupler channels with semi- APPLICATIONS conductor circuitry to enable a complete, isolated I2C interface in a small form factor package. Isolated I2C, SMBus, or PMBus interfaces Multilevel I2C interfaces Power supplies Networking Power over Ethernet FUNCTIONAL BLOCK DIAGRAMS GND1 1 16 GND2 GND1 1 16 GND2 ADuM2250 ADuM2251 NC 2 15 NC NC 2 15 NC VDD1 3 14 VDD2 VDD1 3 14 VDD2 NC 4 DECODE ENCODE 13 NC NC 4 DECODE ENCODE 13 NC SDA1 5 ENCODE DECODE 12 SDA2 SDA1 5 ENCODE DECODE 12 SDA2 SCL1 6 DECODE ENCODE 11 SCL2 SCL1 6 ENCODE DECODE 11 SCL2 GND1 7 ENCODE DECODE 10 NC GND1 7 10 NC NC 8NC = NO CONNECT 9 GND2 06670-001 NC 8NC = NO CONNECT 9 GND2 06670-002 Figure 1. ADuM2250 Functional Block Diagram Figure 2. ADuM2251 Functional Block Diagram 1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329; other patents pending. Rev. D Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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. Tel: 781.329.4700 ©2007–2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com

ADuM2250/ADuM2251 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................7 Applications ....................................................................................... 1 ESD Caution...................................................................................7 General Description ......................................................................... 1 Pin Configuration and Function Descriptions ..............................8 Functional Block Diagrams ............................................................. 1 Test Conditions ..................................................................................9 Revision History ............................................................................... 2 Applications Information .............................................................. 10 Specifications ..................................................................................... 3 Functional Description .............................................................. 10 Electrical Characteristics ............................................................. 3 Startup .......................................................................................... 11 Package Characteristics ............................................................... 5 Capacitive Load at Low Speeds ................................................ 11 Regulatory Information ............................................................... 5 Magnetic Field Immunity .......................................................... 12 Insulation and Safety Related Specifications ............................ 5 Outline Dimensions ....................................................................... 13 DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 Insulation Ordering Guide .......................................................................... 14 Characteristics ................................................................................ 6 Automotive Products ................................................................. 14 Recommended Operating Conditions ...................................... 6 REVISION HISTORY 7/15—Rev. C to Rev. D 9/11—Rev. 0 to Rev. A Changes to Table 4 and Table 5 ....................................................... 5 Added 16-Lead SOIC ......................................................... Universal Changes to Ordering Guide .......................................................... 14 Changes to Features Section and Endnote 1 .................................. 1 Changes to Table 4 and Table 5 ....................................................... 6 4/14—Rev. B to Rev. C Changes to Endnote 1 in Table 7 ..................................................... 7 Changes to Features Section............................................................ 1 Changes to Functional Description Section and Figure 7 ........ 10 Added Capacitive Load at Low Speeds Section .......................... 11 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 14 Changes to Ordering Guide .......................................................... 13 Added Automotive Products Section .......................................... 14 4/07—Revision 0: Initial Version 3/13—Rev. A to Rev. B Created Hyperlink for Safety and Regulatory Approvals Entry in Features Section ................................................................. 1 Changes to Features Section............................................................ 1 Changes to Table 4 ............................................................................ 5 Changes to DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 Section and Table 6 ........................... 6 Reformatted Table 8 ......................................................................... 7 Changes to Figure 4, Table 9, and Table 10 ................................... 8 Moved Test Conditions Section ...................................................... 9 Changes to Functional Description Section ............................... 10 Changes to Captions of Figure 8 and Figure 9 ............................ 11 Rev. D | Page 2 of 16

Data Sheet ADuM2250/ADuM2251 SPECIFICATIONS ELECTRICAL CHARACTERISTICS DC Specifications All voltages are relative to their respective grounds. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are at T = 25°C, V = 5 V, and V = 5 V, unless otherwise noted. A DD1 DD2 Table 1. Parameter Symbol Min Typ Max Unit Test Conditions/Comments ADuM2250 Input Supply Current, Side 1, 5 V I 2.8 5.0 mA V = 5 V DD1 DD1 Input Supply Current, Side 2, 5 V I 2.7 5.0 mA V = 5 V DD2 DD2 Input Supply Current, Side 1, 3.3 V I 1.9 3.0 mA V = 3.3 V DD1 DD1 Input Supply Current, Side 2, 3.3 V I 1.7 3.0 mA V = 3.3 V DD2 DD2 ADuM2251 Input Supply Current, Side 1, 5 V I 2.8 6.0 mA V = 5 V DD1 DD1 Input Supply Current, Side 2, 5 V I 2.5 4.7 mA V = 5 V DD2 DD2 Input Supply Current, Side 1, 3.3 V I 1.8 3.0 mA V = 3.3 V DD1 DD1 Input Supply Current, Side 2, 3.3 V I 1.6 2.8 mA V = 3.3 V DD2 DD2 LEAKAGE CURRENTS I , I , 0.01 10 µA V = V , V = V , ISDA1 ISDA2 SDA1 DD1 SDA2 DD2 I , I V = V , V = V ISCL1 ISCL2 SCL1 DD1 SCL2 DD2 SIDE 1 LOGIC LEVELS Logic Input Threshold1 V , V 500 700 mV SDA1IL SCL1IL Logic Low Output Voltage V , V 600 900 mV I = I = 3.0 mA SDA1OL SCL1OL SDA1 SCL1 600 850 mV I = I = 0.5 mA SDA1 SCL1 Input/Output Logic Low Level Difference2 ΔV , ΔV 50 mV SDA1 SCL1 SIDE 2 LOGIC LEVELS Logic Low Input Voltage V , V 0.3 × V V SDA2IL SCL2IL DD2 Logic High Input Voltage V , V 0.7 × V V SDA2IH SCL2IH DD2 Logic Low Output Voltage V , V 400 mV I = I = 30 mA SDA2OL SCL2OL SDA2 SCL2 1 VIL < 0.5 V, VIH > 0.7 V. 2 ΔVS1 = VS1OL − VS1IL. This is the minimum difference between the output logic low level and the input logic low threshold within a given component. This ensures that there is no possibility of the part latching up the bus to which it is connected. Rev. D | Page 3 of 16

ADuM2250/ADuM2251 Data Sheet AC Specifications All voltages are relative to their respective grounds. All minimum/maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are at T = 25°C, V = 5 V, and V = 5 V, unless otherwise noted. See Figure 5 A DD1 DD2 for a timing test diagram. Table 2. Parameter Symbol Min Typ Max Unit Test Conditions/Comments MAXIMUM FREQUENCY 1000 kHz OUTPUT FALL TIME 5 V Operation 4.5 V ≤ V , V ≤ 5.5 V, C = 40 pF, DD1 DD2 L1 R = 1.6 kΩ, C = 400 pF, R = 180 Ω 1 L2 2 Side 1 Output (0.9 V to 0.9 V) t 13 26 120 ns DD1 f1 Side 2 Output (0.9 V to 0.1 V ) t 32 52 120 ns DD2 DD2 f2 3 V Operation 3.0 V ≤ V , V ≤ 3.6 V, C = 40 pF, DD1 DD2 L1 R = 1.0 kΩ, C = 400 pF, R = 120 Ω 1 L2 2 Side 1 Output (0.9 V to 0.9 V) t 13 32 120 ns DD1 f1 Side 2 Output (0.9 V to 0.1 V ) t 32 61 120 ns DD2 DD2 f2 PROPAGATION DELAY 5 V Operation 4.5 V ≤ V , V ≤ 5.5 V, C = C = 0 pF, DD1 DD2 L1 L2 R = 1.6 kΩ, R = 180 Ω 1 2 Side 1 to Side 2, Rising Edge1 t 95 130 ns PLH12 Side 1 to Side 2, Falling Edge2 t 162 275 ns PHL12 Side 2 to Side 1, Rising Edge3 t 31 70 ns PLH21 Side 2 to Side 1, Falling Edge4 t 85 155 ns PHL21 3 V Operation 3.0 V ≤ V , V ≤ 3.6 V, C = C = 0 pF, DD1 DD2 L1 L2 R = 1.0 kΩ, R = 120 Ω 1 2 Side 1 to Side 2, Rising Edge1 t 82 125 ns PLH12 Side 1 to Side 2, Falling Edge2 t 196 340 ns PHL12 Side 2 to Side 1, Rising Edge3 t 32 75 ns PLH21 Side 2 to Side 1, Falling Edge4 t 110 210 ns PHL21 PULSE WIDTH DISTORTION 5 V Operation 4.5 V ≤ V , V ≤ 5.5 V, C = C = 0 pF, DD1 DD2 L1 L2 R = 1.6 kΩ, R = 180 Ω 1 2 Side 1 to Side 2, |t − t | PWD 67 145 ns PLH12 PHL12 12 Side 2 to Side 1, |t − t | PWD 54 85 ns PLH21 PHL21 21 3 V Operation 3.0 V ≤ V , V ≤ 3.6 V, C = C = 0 pF, DD1 DD2 L1 L2 R = 1.0 kΩ, R = 120 Ω 1 2 Side 1 to Side 2, |t − t | PWD 114 215 ns PLH12 PHL12 12 Side 2 to Side 1, |t − t | PWD 77 135 ns PLH21 PHL21 21 COMMON-MODE TRANSIENT IMMUNITY5 |CM |, |CM| 25 35 kV/µs H L 1 tPLH12 propagation delay is measured from the Side 1 input logic threshold to an output value of 0.7 VDD2. 2 tPHL12 propagation delay is measured from the Side 1 input logic threshold to an output value of 0.4 V. 3 tPLH21 propagation delay is measured from the Side 2 input logic threshold to an output value of 0.7 VDD1. 4 tPHL21 propagation delay is measured from the Side 2 input logic threshold to an output value of 0.9 V. 5 CMH is the maximum common-mode voltage slew rate that can be sustained while maintaining VO > 0.8 VDD2. CML is the maximum common-mode voltage slew rate that can be sustained while maintaining VO < 0.8 V. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. The transient magnitude is the range over which the common mode is slewed. Rev. D | Page 4 of 16

Data Sheet ADuM2250/ADuM2251 PACKAGE CHARACTERISTICS Table 3. Parameter Symbol Min Typ Max Unit Test Conditions/Comments Resistance (Input to Output)1 R 1012 Ω I-O Capacitance (Input to Output)1 C 2.2 pF f = 1 MHz I-O Input Capacitance C 4.0 pF I IC Junction to Ambient Thermal Resistance θ 45 °C/W Thermocouple located at center of JA package underside 1 The device is considered a 2-terminal device; Pin 1 through Pin 8 are shorted together, and Pin 9 through Pin 16 are shorted together. REGULATORY INFORMATION The ADuM2250/ADuM2251 are approved by the organizations listed in Table 4. Table 4. UL CSA CQC VDE Recognized Under Approved under CSA Component Approved under CQC11-471543-2012 Certified according to UL 1577 Component Acceptance Notice 5A DIN V VDE V 0884-10 Recognition Program1 (VDE V 0884-10):2006-122 Single Protection, Basic insulation per CSA 60950-1-07 Basic insulation per GB4943.1-2011, Reinforced insulation, 5000 V rms Isolation and IEC 60950-1, 600 V rms 600 V rms (848 V peak) maximum 849 V peak Voltage (849 V peak) maximum working voltage, tropical climate, working voltage altitude ≤ 5000 m RW-16 package: reinforced RW-16 package: reinforced insulation insulation per CSA 60950-1-07 and per GB4943.1-2011, 380 V rms (537 V peak) IEC 60950-1, 380 V rms (537 V peak) maximum working voltage, maximum working voltage tropical climate, altitude ≤ 5000 m Reinforced insulation per IEC 60601-1, 125 V rms (176 V peak) maximum working voltage RI-16-2 package: reinforced RI-16 package: reinforced insulation insulation per CSA 60950-1-07 and per 400 V rms (565 V peak) maximum IEC 60950-1, 400 V rms (565 V peak) working voltage, tropical climate, maximum working voltage altitude ≤ 5000 m Reinforced insulation per IEC 60601-1, 250 V rms (353 V peak) maximum working voltage File E214100 File 205078 File CQC14001117251 File 2471900-4880-0001 1 In accordance with UL 1577, each ADuM2250/ADuM2251 is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 sec (current leakage detection limit = 10 μA). 2 In accordance with DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, each ADuM2250/ADuM2251 is proof tested by applying an insulation test voltage ≥ 1590 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 (VDE V 0884-10):2006-12 approval. INSULATION AND SAFETY RELATED SPECIFICATIONS Table 5. Parameter Symbol Value Unit Test Conditions/Comments Rated Dielectric Insulation Voltage 5000 V rms 1-minute duration Minimum External Air Gap (Clearance) L(I01) 8.0 min mm Distance measured from input terminals to output terminals, shortest distance through air along the PCB mounting plane, as an aid to PC board layout Minimum External Tracking (Creepage) L(I02) Measured from input terminals to output terminals, shortest distance path along body RW-16 Package 7.7 min mm RI-16-2 Package 8.3 min mm Minimum Internal Distance (Internal Clearance) 0.017 min mm Insulation distance through insulation Tracking Resistance (Comparative Tracking Index) CTI >400 V DIN IEC 112/VDE 0303, Part 1 Isolation Group II Material Group (DIN VDE 0110, 1/89, Table 1) Rev. D | Page 5 of 16

ADuM2250/ADuM2251 Data Sheet DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 INSULATION CHARACTERISTICS These isolators are suitable for reinforced isolation only within the safety limit data. Maintenance of the safety data is ensured by protective circuits. The asterisk (*) marking branded on the component designates DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 approval for an 849 V peak working voltage. Table 6. Description Test Conditions/Comments Symbol Characteristic Unit Installation Classification per DIN VDE 0110 For Rated Mains Voltage ≤ 300 V rms I to IV For Rated Mains Voltage ≤ 450 V rms I to II For Rated Mains Voltage ≤ 600 V rms I to II Climatic Classification 40/105/21 Pollution Degree per DIN VDE 0110, Table 1 2 Maximum Working Insulation Voltage V 849 V peak IORM Input to Output Test Voltage, Method b1 V × 1.875 = V , 100% production test, t = 1 sec, V 1592 V peak IORM PR m PR partial discharge < 5 pC Input to Output Test Voltage, Method a V PR After Environmental Tests Subgroup 1 V × 1.6 = V , t = 60 sec, partial discharge < 5 pC 1358 V peak IORM PR m After Input and/or Safety Tests V × 1.2 = V , t = 60 sec, partial discharge < 5 pC 1018 V peak IORM PR m Subgroup 2 and Subgroup 3 Highest Allowable Overvoltage Transient overvoltage, t = 10 sec V 6000 V peak TR TR Safety Limiting Values Maximum value allowed in the event of a failure (see Figure 3) Case Temperature T 150 °C S Supply Current I + I I 555 mA DD1 DD2 S Insulation Resistance at T V = 500 V R >109 Ω S IO S Thermal Derating Curve RECOMMENDED OPERATING CONDITIONS 600 Table 7. A) Parameter Symbol Min Max Unit m500 NT ( Operating Temperature TA −40 +105 °C CURREDD1400 SInupVpuoptll/tyOa Vguoetlp taugt eSsig1 nal VVVSDSDDDAA112,, ,V VVDSSDCCL2L1 2, 3.0 55..55 VV V300 G Capacitive Load N ATI Side 1 CL1 40 pF R200 E Side 2 C 400 pF P L2 O AFE 100 Static Output Loading S Side 1 ISDA1, ISCL1 0.5 3 mA Side 2 I , I 0.5 30 mA 00 50AMBIENT TEM10P0ERATURE (°C1)50 200 06670-003 1 All voltages are relative to their resSpDeAc2tivSeC gL2r ounds. Figure 3. Thermal Derating Curve, Dependence of Safety Limiting Values on Case Temperature, per DIN V VDE V 0884-10 Rev. D | Page 6 of 16

Data Sheet ADuM2250/ADuM2251 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a Table 8. stress rating only; functional operation of the product at these Parameter Rating or any other conditions above those indicated in the operational Storage Temperature (T ) −65°C to +150°C ST section of this specification is not implied. Operation beyond Ambient Operating Temperature (T ) −40°C to +105°C A the maximum operating conditions for extended periods may Supply Voltages (V , V )1 −0.5 V to +7.0 V DD1 DD2 affect product reliability. Input/Output Voltage Side 1 (V , V )1 −0.5 V to V + 0.5 V ESD CAUTION SDA1 SCL1 DD1 Side 2 (V , V )1 −0.5 V to V + 0.5 V SDA2 SCL2 DD2 Average Output Current per Pin2 Side 1 (I ) ±18 mA O1 Side 2 (I ) ±100 mA O2 Common-Mode Transients3 −100 kV/µs to +100 kV/µs 1 All voltages are relative to their respective grounds. 2 See Figure 3 for maximum rated current values for various temperatures. 3 Refers to common-mode transients across the insulation barrier. Common- mode transients exceeding the absolute maximum rating may cause latch-up or permanent damage. Rev. D | Page 7 of 16

ADuM2250/ADuM2251 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS GND1 1 16 GND2 NC 2 15 NC VDD1 3 ADuM2250/ 14 VDD2 NC 4 ADuM2251 13 NC SDA1 5 (NToOt Pto V SIEcWale) 12 SDA2 SCL1 6 11 SCL2 GND1 7 10 NC NC 8 9 GND2 NC = NO CONNECT NOTES 1. PIN 1AND PIN 7ARE INTERNALLY CONNECTEDTO EACH OTHER,AND IT IS 2 . PRRIEENCC 9OOAMMNMMDEE PNNIDDNEE 1DD6 TTAHHRAAETT I NBBTOOETTRHHN PPAIILNNLSSY BB CEEO CCNOONNNENNCEETCCETTDEETDDOTT EOOA AAC HCC OOOMMTMMHEOORNN, GGANRRDOO UUITNN IDDS.. 06670-004 Figure 4. Pin Configuration Table 9. ADuM2250 Pin Function Descriptions Pin No. Mnemonic Description 1, 7 GND Ground 1. Ground reference for Isolator Side 1. Pin 1 and Pin 7 are internally connected to each other, and 1 it is recommended that both pins be connected to a common ground. 2, 4, 8, 10, NC No Connect. 13, 15 3 V Supply Voltage, 3.0 V to 5.5 V. DD1 5 SDA Data Input/Output, Side 1. 1 6 SCL Clock Input/Output, Side 1. 1 9, 16 GND Ground 2. Isolated ground reference for Isolator Side 2. Pin 9 and Pin 16 are internally connected to each 2 other, and it is recommended that both pins be connected to a common ground. 11 SCL Clock Input/Output, Side 2. 2 12 SDA Data Input/Output, Side 2. 2 14 V Supply Voltage, 3.0 V to 5.5 V. DD2 Table 10. ADuM2251 Pin Function Descriptions Pin No. Mnemonic Description 1, 7 GND Ground 1. Ground reference for Isolator Side 1. Pin 1 and Pin 7 are internally connected to each other, and 1 it is recommended that both pins be connected to a common ground. 2, 4, 8, 10, NC No Connect. 13, 15 3 V Supply Voltage, 3.0 V to 5.5 V. DD1 5 SDA Data Input/Output, Side 1. 1 6 SCL Clock Input, Side 1. 1 9, 16 GND Ground 2. Isolated ground reference for Isolator Side 2. Pin 9 and Pin 16 are internally connected to each 2 other, and it is recommended that both pins be connected to a common ground. 11 SCL Clock Output, Side 2. 2 12 SDA Data Input/Output, Side 2. 2 14 V Supply Voltage, 3.0 V to 5.5 V. DD2 Rev. D | Page 8 of 16

Data Sheet ADuM2250/ADuM2251 TEST CONDITIONS GND1 GND2 1 16 NC ADuM2250 NC 2 15 VDD1 VDD2 3 14 NC NC R1 R1 4 DECODE ENCODE 13 R2 R2 SDA1 SDA2 5 ENCODE DECODE 12 SCL1 SCL2 6 DECODE ENCODE 11 CL1 CL1 GND1 7 ENCODE DECODE 10 NC CL2 CL2 NC GND2 8NC = NO CONNECT 9 06670-005 Figure 5. Timing Test Diagram Rev. D | Page 9 of 16

ADuM2250/ADuM2251 Data Sheet APPLICATIONS INFORMATION FUNCTIONAL DESCRIPTION A bus segment is a portion of the I2C bus that is isolated from The ADuM2250/ADuM2251 interface on each side to I2C sig- other portions of the bus by galvanic isolation, bus extenders, or nals. Internally, the bidirectional I2C signals are split into two level shifting buffers. Table 11 shows how multiple ADuM2250/ unidirectional channels communicating in opposite directions ADuM2251 components can coexist on a bus as long as two via dedicated iCoupler isolation channels. One channel of each Side 1 buffers are not connected to the same bus segment. pair (the Side 1 input of each input/output pin in Figure 6) Table 11. ADuM2250/ADuM2251 Buffer Compatibility implements a special input buffer and output driver that can Side 1 Side 2 differentiate between externally generated inputs and its own Side 1 No Yes output signals. It transfers only externally generated input signals to the corresponding Side 2 data or clock pin. Side 2 Yes Yes Both the Side 1 and Side 2 I2C pins are designed to interface to The output logic low levels are independent of the VDD1 and an I2C bus operating in the 3.0 V to 5.5 V range. A logic low on VDD2 voltages. The input logic low threshold at Side 1 is also either side causes the corresponding input/output pin across the independent of VDD1. However, the input logic low threshold at coupler to be pulled low enough to comply with the logic low Side 2 is designed to be at 0.3 VDD2, consistent with I2C require- threshold requirements of other I2C devices on the bus. Bus ments. The Side 1 and Side 2 input/output pins have open- contention and latch-up are avoided by guaranteeing that the collector outputs whose high levels are set via pull-up resistors input low threshold at SDA or SCL is at least 50 mV less than to their respective supply voltages. 1 1 the output low signal at the same pin. This prevents an output logic low at Side 1 from being transmitted back to Side 2 and GND1 GND2 1 16 pulling down the I2C bus by latching the state. NC ADuM2250 NC 2 15 Because the Side 2 logic levels/thresholds and drive capabilities comply fully with standard I2C values, multiple ADuM2250/ VDD1 3 14VDD2 ADuM2251 devices connected to a bus by their Side 2 pins can NC NC communicate with each other and with other I2C-compatible 4 DECODE ENCODE 13 devices, as shown in Figure 7. Note the distinction between I2C SDA1 5 ENCODE DECODE 12SDA2 compatibility and I2C compliance. I2C compatibility refers to situ- SCL1 SCL2 ations in which the logic levels or drive capability of a component 6 DECODE ENCODE 11 do not necessarily meet the requirements of the I2C specification GND1 NC 7 ENCODE DECODE 10 but still allow the component to communicate with an I2C-com- pliant device. I2C compliance refers to situations in which the NC 8 9 GND2 logic levels and drive capability of a component fully meet the requirements of the I2C specification. SNYCM =B NOOL CINODNINCEACTETS A DUAL THRESHOLD INPUT BUFFER. 06670-006 Because the Side 1 pin has a modified output level/input threshold, Figure 6. ADuM2250 Block Diagram Side 1 of the ADuM2250/ADuM2251 can communicate only with Figure 7 shows a typical application circuit, including the pull-up devices that are fully compliant with the I2C standard. In other resistors required for both Side 1 and Side 2 buses. Bypass capac- words, Side 2 of the ADuM2250/ADuM2251 is I2C-compliant, itors with values from 0.01 μF to 0.1 μF are required between whereas Side 1 is only I2C-compatible. V and GND and between V and GND. The 200 Ω resistor DD1 1 DD2 2 The Side 1 input/output pins must not be connected to other shown in Figure 7 is required for latch-up immunity if the ambient I2C buffers that implement a similar scheme of dual input/output temperature can be between 105°C and 125°C. threshold detection. This latch-up prevention scheme is I2C BUS implemented in several popular I2C level shifting and bus 1 16 OPTIONAL extension products currently available from Analog Devices MICRO- 200Ω 2 ADuM225015 PROCESSOR VDD1 3 14 VDD2 adnatda oshtheeetr omf apnoutefnatcitaul rIe2Crs .b Cusa rbeu fsfheoriunlgd pbreo dtaukcetns ttoo erenvsiuerwe tthhea t SECOONRDARY SDA1 54 1123 SDA2 only one buffer on a bus segment implements a dual threshold SEGBUMSENT SCL1 6 11 SCL2 s cheme. GND1 87 190 GND2 06670-007 Figure 7. Typical Isolated I2C Interface Using the ADuM2250 Rev. D | Page 10 of 16

Data Sheet ADuM2250/ADuM2251 STARTUP Both the V and V supplies have an undervoltage lockout DD1 DD2 feature that prevents the signal channels from operating unless MINIMUM RECOMMENDED certain criteria are met. This feature prevents the possibility of OPERATING SUPPLY, 3.0V input logic low signals pulling down the I2C bus inadvertently SUPPLYVALID MINIMUMVALID SUPPLY, 2.5V during power-up/power-down. INTERNAL START-UP For the signal channels to be enabled, the following criteria THRESHOLD, 2.0V must be met: • Both supplies must be at least 2.5 V. 40µs 06670-009 • At least 40 μs must elapse after both supplies exceed the Figure 9. Start-Up Condition, Supply Slew Rate < 12.5 V/ms internal start-up threshold of 2.0 V. CAPACITIVE LOAD AT LOW SPEEDS Until both criteria are met for both supplies, the ADuM2250/ The ADuM2250/ADuM2251 are designed for operation at ADuM2251 outputs are pulled high, thereby ensuring a startup speeds up to 1 Mbps. Due to the limited current available on that avoids any disturbances on the bus. Figure 8 and Figure 9 Side 1 operation at 1 Mbps limits the capacitance that can be illustrate the supply conditions for fast and slow input supply driven at the minimum pull-up value to 40 pF. slew rates. Most applications operate at 100 kbps in standard mode or 400 kbps in fast mode. At these lower operating speeds, the limitation on the load capacitance can be significantly relaxed. MINIMUM RECOMMENDED Table 12 shows the maximum capacitance at minimum pull-up OPERATING SUPPLY, 3.0V values for standard and fast operating modes. If larger values for SUPPLYVALID MINIMUMVALID SUPPLY, 2.5V the pull-up resistor are used, the maximum supported capacitance must be scaled down proportionately so that the rise time does INTERNAL START-UP THRESHOLD, 2.0V not increase beyond the values required by the standard. 40µs 06670-008 Figure 8. Start-Up Condition, Supply Slew Rate > 12.5 V/ms Table 12. Side 1 Maximum Load Conditions Maximum Capacitive Load for Side 1 Mode V Data Rate (kbps) t (ns) t (ns) R (Ω) C (pF) DD1 r f 1 L1 Standard 5 100 1000 187 1600 484 Fast 5 400 300 172 1600 120 Standard 3.3 100 1000 270 1000 771 Fast 3.3 400 300 235 1000 188 Rev. D | Page 11 of 16

ADuM2250/ADuM2251 Data Sheet MAGNETIC FIELD IMMUNITY For example, at a magnetic field frequency of 1 MHz, the maxi- mum allowable magnetic field of 0.2 kgauss induces a voltage of The ADuM2250/ADuM2251 are extremely immune to external 0.25 V at the receiving coil. This voltage is approximately 50% of magnetic fields. The limitation on the magnetic field immunity the sensing threshold and does not cause a faulty output transition. of the ADuM2250/ADuM2251 is set by the condition in which Similarly, if such an event occurs during a transmitted pulse (and induced voltage in the receiving coil of the transformer is suffi- is of the worst-case polarity), it reduces the received pulse from ciently large to either falsely set or reset the decoder. The following >1.0 V to 0.75 V—still well above the 0.5 V sensing threshold of analysis defines the conditions under which this may occur. The the decoder. 3 V operating condition of the ADuM2250/ADuM2251 is examined because it represents the most susceptible mode of The preceding magnetic flux density values correspond to operation. specific current magnitudes at given distances away from the ADuM2250/ADuM2251 transformers. Figure 11 expresses The pulses at the transformer output have an amplitude greater these allowable current magnitudes as a function of frequency than 1.0 V. The decoder has a sensing threshold at approximately for selected distances. As shown in Figure 11, the ADuM2250/ 0.5 V, thus establishing a 0.5 V margin in which induced voltages ADuM2251 are extremely immune and can be affected only by can be tolerated. The voltage induced across the receiving coil is extremely large currents operated at high frequency very close given by to the component. For the 1 MHz example, a 0.5 kA current V = (−dβ/dt) ∑ πr2; n = 1, 2, … , N n must be placed 5 mm away from the ADuM2250/ADuM2251 where: to affect the operation of the component. β is the magnetic flux density (gauss). Note that at combinations of strong magnetic fields and high r is the radius of the nth turn in the receiving coil (cm). n frequencies, any loops formed by printed circuit board traces can N is the number of turns in the receiving coil. induce error voltages sufficiently large to trigger the thresholds Given the geometry of the receiving coil in the ADuM2250/ of succeeding circuitry. Exercise care in the layout of such traces ADuM2251 and an imposed requirement that the induced to avoid this possibility. voltage be, at most, 50% of the 0.5 V margin at the decoder, a 1000 maximum allowable magnetic field is calculated, as shown in Figure 10. kA) DISTANCE = 1m T ( 100 N 100 E R R X U U C C FL 10 BLE 10 ETI WA DISTANCE = 100mm OWABLE MAGNNSITY (kgauss)0.11 MAXIMUM ALLO 0.11 DISTANCE = 5mm LE ALD MAXIMUM 0.01 0.011k 10MkAGNET1IC0 0FkIELD FRE1QMUENCY (H1z0)M 100M 06670-011 Figure 11. Maximum Allowable Current for Various 0.0011k 10kMAGNETI1C0 0FkIELD FREQ1MUENCY (Hz1)0M 100M 06670-010 Current-to-ADuM2250/ADuM2251 Spacings Figure 10. Maximum Allowable External Magnetic Flux Density Rev. D | Page 12 of 16

Data Sheet ADuM2250/ADuM2251 OUTLINE DIMENSIONS 10.50(0.4134) 10.10(0.3976) 16 9 7.60(0.2992) 7.40(0.2913) 1 8 10.65(0.4193) 10.00(0.3937) 1.27(0.0500) 0.75(0.0295) BSC 2.65(0.1043) 0.25(0.0098) 45° 0.30(0.0118) 2.35(0.0925) 8° 0.10(0.0039) 0° COPLANARITY 0.10 0.51(0.0201) SPELAATNIENG 0.33(0.0130) 1.27(0.0500) 0.31(0.0122) 0.20(0.0079) 0.40(0.0157) C(RINOEFNPEATRRREOENNLCLTEIHNCEOGOSNDMELISPYM)LAEAIANNRNDSETIAORTRNOOESUJNANEORDDETEEDAICN-POSMPFTRIFALONLMPIDMIRLAELIRATIMTDEEESRTFSMEO;SRIRN-0ECU1QH3SU-EADIVAIINMAELDENENSSTIIOGSNNFS.OR 03-27-2007-B Figure 12. 16-Lead Standard Small Outline Package [SOIC_W] Wide Body (RW-16) Dimensions shown in millimeters (inches) 12.85 12.75 12.65 1.93 REF 16 9 7.60 7.50 7.40 10.51 1 8 10.31 PIN 1 10.11 MARK 0.71 2.64 0.25 BSC 0.50 45° 2.44 GAGE 0.31 2.24 2.54 PLANE 0.32 2.44 0.23 0.30 0.20 SEATING 8° 0.10 1.27 BSC PLANE 0° 0.46 1.01 COPLANARITY 0.1 CO0M.3P6LIANTTO JEDEC STANDARDS MS-013-A00..C7561 11-15-2011-A Figure 13. 16-Lead Standard Small Outline Package, with Increased Creepage [SOIC_IC] Wide Body (RI-16-2) Dimensions shown in millimeters Rev. D | Page 13 of 16

ADuM2250/ADuM2251 Data Sheet ORDERING GUIDE Number of Number Maximum Inputs, of Inputs, Data Rate Temperature Package Model1, 2 V Side V Side (Mbps) Range Package Description Option DD1 DD2 ADuM2250ARWZ 2 2 1 −40°C to +105°C 16-Lead SOIC_W RW-16 ADuM2250ARWZ-RL 2 2 1 −40°C to +105°C 16-Lead SOIC_W, 13” Tape and Reel RW-16 ADuM2250WARWZ 2 2 1 −40°C to +125°C 16-Lead SOIC_W RW-16 ADuM2250WARWZ-RL 2 2 1 −40°C to +125°C 16-Lead SOIC_W, 13” Tape and Reel RW-16 ADuM2250ARIZ 2 2 1 −40°C to +105°C 16-Lead SOIC_IC RI-16-2 ADuM2250ARIZ-RL 2 2 1 −40°C to +105°C 16-Lead SOIC_IC, 13” Tape and Reel RI-16-2 ADuM2251ARWZ 2 1 1 −40°C to +105°C 16-Lead SOIC_W RW-16 ADuM2251ARWZ-RL 2 1 1 −40°C to +105°C 16-Lead SOIC_W, 13” Tape and Reel RW-16 ADuM2251WARWZ 2 1 1 −40°C to +125°C 16-Lead SOIC_W RW-16 ADuM2251WARWZ-RL 2 1 1 −40°C to +125°C 16-Lead SOIC_W, 13” Tape and Reel RW-16 ADuM2251ARIZ 2 1 1 −40°C to +105°C 16-Lead SOIC_IC RI-16-2 ADuM2251ARIZ-RL 2 1 1 −40°C to +105°C 16-Lead SOIC_IC, 13” Tape and Reel RI-16-2 1 Z = RoHS Compliant Part. 2 W = Qualified for Automotive Applications. AUTOMOTIVE PRODUCTS The ADuM2250W and ADuM2251W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive model may have specifications that differ from the commercial model; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models. Rev. D | Page 14 of 16

Data Sheet ADuM2250/ADuM2251 NOTES Rev. D | Page 15 of 16

ADuM2250/ADuM2251 Data Sheet NOTES I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ©2007–2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06670-0-7/15(D) Rev. D | Page 16 of 16

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: A nalog Devices Inc.: ADUM2250ARWZ ADUM2250ARWZ-RL ADUM2251ARWZ-RL ADUM2250ARIZ-RL ADUM2251ARIZ-RL ADUM2251ARIZ ADUM2251ARWZ ADUM2250ARIZ ADUM2251WARWZ-RL ADUM2250WARWZ-RL ADUM2251WARWZ ADUM2250WARWZ