Isolated CAN Transceiver with Integrated High Voltage, Bus-Side, Linear Regulator ADM3052 Data Sheet FEATURES GENERAL DESCRIPTION 5 kV rms isolated CAN transceiver Integrated V+ linear regulator Bus side powered by V+ and V− 11 V to 25 V operation on V+ 5 V or 3.3 V operation on VDD1 Complies with ISO 11898 standard High speed data rates up to 1 Mbps Short-circuit protection on bus pins Integrated bus miswire protection Unpowered nodes do not disturb the bus 110 or more nodes on the bus Thermal shutdown protection High common-mode transient immunity: >25 kV/μs Safety and regulatory approvals UL recognition 5000 VRMS for 1 minute per UL 1577 VDE Certificates of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 846 V peak Industrial operating temperature range: −40°C to +85°C Wide body, 16-lead SOIC package The ADM3052 is an isolated controller area network (CAN) physical layer transceiver with a V+ integrated linear regulator. The ADM3052 complies with the ISO 11898 standard. The device employs Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a CAN transceiver, and a linear regulator into a single package. The power is isolated between a single 3.3 V or 5 V supply on VDD1, the logic side, and a single 24 V supply provided on V+, the bus side. The ADM3052 creates an isolated interface between the CAN protocol controller and the physical layer bus. It is capable of running at data rates up to 1 Mbps. The device has integrated miswire protection on the bus pins, V+, V−, CANH, and CANL. The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where the bus may be shorted to ground or power terminals. The device is fully specified over the industrial temperature range and is available in a 16-lead, wide-body SOIC package. APPLICATIONS CAN data buses Industrial field networks DeviceNet applications FUNCTIONAL BLOCK DIAGRAM VDD1 CINT ISOLATION BARRIER LINEAR REGULATOR V+R VDD2 V+SENSE DECODE ENCODE BUS V+SENSE VDD2 V+ PROTECTION ENCODE DECODE RxD DECODE ENCODE TxD DRIVER CANH RxD CANL RECEIVER VREF REFERENCE VOLTAGE VREF GND2 GND2 DIGITAL ISOLATION ADM3052 CAN TRANSCEIVER GND1 LOGIC SIDE BUS SIDE V– 09292-001 TxD Figure 1. Rev. B 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. 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Technical Support www.analog.com ADM3052 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Test Circuits ..................................................................................... 12 Applications ....................................................................................... 1 Switching Characteristics .............................................................. 13 General Description ......................................................................... 1 Circuit Description......................................................................... 14 Functional Block Diagram .............................................................. 1 CAN Transceiver Operation ..................................................... 14 Revision History ............................................................................... 2 Electrical Isolation...................................................................... 14 Specifications..................................................................................... 3 Truth Tables................................................................................. 14 Timing Specifications .................................................................. 4 Thermal Shutdown .................................................................... 16 Regulatory Information ............................................................... 4 Linear Regulator ......................................................................... 16 Insulation and Safety-Related Specifications ............................ 4 Magnetic Field Immunity.......................................................... 16 VDE 0884 Insulation Characteristics ........................................ 5 Applications Information .............................................................. 17 Absolute Maximum Ratings............................................................ 6 Typical Applications ................................................................... 17 ESD Caution .................................................................................. 6 DeviceNet™ and the ADM3052 CAN Transceiver ................. 17 Pin Configuration and Function Descriptions ............................. 7 Outline Dimensions ....................................................................... 18 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 18 REVISION HISTORY 6/2016—Rev. A to Rev. B Changes to Tracking Resistance (Comparative Tracking Index) Parameter and Isolation Group Parameter, Table 4 ..................... 4 Added Table 7; Renumbered Sequentially .................................... 6 12/2012—Rev. 0 to Rev. A Changes to Features Section (Approvals No Longer Pending) .. 1 Changes to Table 3 Caption (Approvals No Longer Pending) ... 4 Changed VDE 0884 Insulation Characteristics (Pending) Section to VDE 0884 Insulation Characteristics Section ............ 5 Changes to Table Summary Text Prior to Table 5 ........................ 5 Added DeviceNetTM and the ADM3052 CAN Transceiver Section .............................................................................................. 17 6/2011—Revision 0: Initial Version Rev. B | Page 2 of 20 Data Sheet ADM3052 SPECIFICATIONS All voltages are relative to their respective ground; 3.0 V ≤ VDD1 ≤ 5.5 V, TA = −40°C to +85°C, V+ = 11 V to 25 V, unless otherwise noted. Table 1. Parameter SUPPLY CURRENT Power Supply Current Logic Side TxD/RxD Data Rate 1 Mbps Power Supply Current Bus Side Recessive State Dominant State TxD/RxD Data Rate 1 Mbps EXTERNAL RESISTOR Resistance Power Rating DRIVER Logic Inputs Input Voltage High Input Voltage Low CMOS Logic Input Currents Differential Outputs Recessive Bus Voltage CANH Output Voltage CANL Output Voltage Differential Output Voltage Short-Circuit Current, CANH Symbol Min Typ Max Unit IDD1 0.7 2 mA I+ I+ I+ 64 48 10 75 55 mA mA mA 300 303 Ω W Voltage Dominant Input Voltage Hysteresis CANH, CANL Input Resistance Differential Input Resistance Logic Outputs Output Low Voltage Output High Voltage Short-Circuit Current VOLTAGE REFERENCE Reference Output Voltage BUS VOLTAGE SENSE V+SENSE Output Voltage Low V+SENSE Output Voltage High Threshold Voltage COMMON-MODE TRANSIENT IMMUNITY1 1 RL = 60 Ω, see Figure 26 RL = 60 Ω, see Figure 26 RL = 60 Ω, see Figure 26 RP 297 0.75 VIH VIL IIH, IIL 0.7 VDD1 V 0.25 VDD1 V 500 μA TxD TxD TxD VCANL, VCANH VCANH VCANL VOD VOD ISCCANH 2.0 2.75 0.5 1.5 −500 3.0 4.5 2.0 3.0 +50 −200 200 V V V V mV mA mA mA VTxD = high, RL = ∞, see Figure 23 VTxD = low, see Figure 23 VTxD = low, see Figure 23 VTxD = low, RL = 45 Ω, see Figure 23 VTxD = high, RL = ∞, see Figure 23 VCANH = −5 V VCANH = −36 V VCANL = 36 V −7 V < VCANL, VCANH < 12 V, see Figure 24, CL = 15 pF −7 V < VCANL, VCANH < 12 V, see Figure 24, CL = 15 pF See Figure 24 −100 Short-Circuit Current, CANL RECEIVER Differential Inputs Voltage Recessive Test Conditions ISCCANL VIDR −1.0 +0.5 V VIDD 0.9 5.0 V VHYS RIN RDIFF 5 20 25 100 mV kΩ kΩ VOL VOH IOS 0.2 0.4 VDD1 − 0.3 VDD1 − 0.2 7 85 V V mA IOUT = 1.5 mA IOUT = −1.5 mA VOUT = GND1 or VDD1 VREF 2.025 V |IREF = 50 μA| VOL VOH V+SENSETH 0.2 0.4 VDD1 − 0.3 VDD1 − 0.2 7.0 10 25 V V V kV/μs IO+SENSE = 1.5 mA IO+SENSE = −1.5 mA 150 3.025 VCM = 1 kV, transient magnitude = 800 V CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. VCM is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the common mode is slewed. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. Rev. B | Page 3 of 20 ADM3052 Data Sheet TIMING SPECIFICATIONS All voltages are relative to their respective ground; 3.0 V ≤ VDD1 ≤ 5.5 V, TA = −40°C to +85°C, V+ = 11 V to 25 V, unless otherwise noted. Table 2. Parameter DRIVER Maximum Data Rate Propagation Delay from TxD On to Bus Active Symbol Min Typ Max Unit tonTxD 90 Mbps ns Propagation Delay from TxD Off to Bus Inactive toffTxD 120 ns RECEIVER Propagation Delay from TxD On to Receiver Active tonRxD 200 ns toffRxD 250 ns tSE tSD 300 10 μs ms 1 Propagation Delay from TxD Off to Receiver Inactive POWER-UP Enable Time, V+ High to V+SENSE Low Disable Time, V+ Low to V+SENSE High Test Conditions See Figure 25 and Figure 27, RL = 60 Ω, CL = 100 pF See Figure 25 and Figure 27, RL = 60 Ω, CL = 100 pF See Figure 25 and Figure 27, RL = 60 Ω, CL = 100 pF See Figure 25 and Figure 27, RL = 60 Ω, CL = 100 pF See Figure 29 See Figure 29 REGULATORY INFORMATION Table 3. ADM3052 Approvals Organization UL Approval Type Recognized under the component recognition program of Underwriters Laboratories, Inc. VDE Certified according to DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 Notes In accordance with UL 1577, each ADM3052 is proof tested by applying an insulation test voltage ≥6000 V rms for 1 second (current leakage detection limit = 10 μA) In accordance with DIN V VDE V 0884-10, each ADM3052 is proof tested by applying an insulation test voltage ≥1590 V peak for 1 second (partial discharge detection limit = 5 pC) INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 4. Parameter Rated Dielectric Insulation Voltage Minimum External Air Gap (Clearance) Symbol L(I01) Value 5000 7.7 Unit V rms mm Minimum External Tracking (Creepage) L(I02) 7.6 mm Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group CTI 0.017 min >400 II mm V Rev. B | Page 4 of 20 Conditions 1-minute duration Measured from input terminals to output terminals, shortest distance through air Measured from input terminals to output terminals, shortest distance along body Insulation distance through insulation DIN IEC 112/VDE 0303-1 Material group (DIN VDE 0110) Data Sheet ADM3052 VDE 0884 INSULATION CHARACTERISTICS This isolator is suitable for reinforced electrical isolation within the safety limit data. Maintenance of the safety data must be ensured by means of protective circuits. An asterisk (*) on packages denotes DIN V VDE V 0884-10 approval. Table 5. Description CLASSIFICATIONS Installation Classification per DIN VDE 0110 for Rated Mains Voltage ≤150 V rms ≤300 V rms ≤400 V rms Climatic Classification Pollution Degree VOLTAGE Maximum Working Insulation Voltage Input-to-Output Test Voltage, Method B1 Input-to-Output Test Voltage, Method A After Environmental Tests, Subgroup 1 After Input and/or Safety Test, Subgroup 2/Subgroup 3 Test Conditions Symbol VIORM VPR 846 1590 V peak V peak VPR 1357 V peak 1018 V peak VTR 6000 V peak TS IS, INPUT IS, OUTPUT RS 150 265 335 >109 °C mA mA Ω VIORM × 1.6 = VPR, tm = 60 sec, partial discharge < 5 pC VIORM × 1.2 = VPR, tm = 60 sec, partial discharge < 5 pC Highest Allowable Overvoltage SAFETY-LIMITING VALUES Case Temperature Input Current Output Current Insulation Resistance at TS Rev. B | Page 5 of 20 Unit I to IV I to III I to II 40/85/21 2 DIN VDE 0110 VIORM × 1.875 = VPR, 100% production tested, tm = 1 sec, partial discharge < 5 pC Characteristic ADM3052 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. All voltages are relative to their respective ground. Parameter AC Voltage Bipolar Waveform Basic Insulation Table 6. Parameter VDD1 V+ V+R Digital Input Voltage TxD Digital Output Voltage RxD V+SENSE CANH, CANL VREF Operating Temperature Range Storage Temperature Range ESD (Human Body Model) Lead Temperature Soldering (10 sec) Vapor Phase (60 sec) Infrared (15 sec) θJA, Thermal Impedance TJ, Junction Temperature Table 7. Maximum Continuous Working Voltage1 Rating −0.5 V to +6 V −36 V to +36 V −36 V to +36 V Reinforced Insulation −0.5 V to VDD1 + 0.5 V −0.5 V to VDD1 + 0.5 V −0.5 V to VDD1 + 0.5 V −36 V to +36 V −0.5 V to +6 V −40°C to +85°C −55°C to +150°C 3 kV Unipolar Waveform Basic Insulation Reinforced Insulation DC Voltage Basic Insulation Reinforced Insulation 1 300°C 215°C 220°C 53°C/W 130°C Max Unit 565 V peak 565 V peak 1131 V peak 864 V peak 1066 V peak 529 V peak Reference Standard 50-year minimum lifetime 50-year minimum lifetime 50-year minimum lifetime Lifetime limited by package creepage Lifetime limited by package creepage Lifetime limited by package creepage Refers to continuous voltage magnitude imposed across the isolation barrier. ESD CAUTION Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. B | Page 6 of 20 Data Sheet ADM3052 NC 1 16 V– GND1 2 15 V+ GND1 3 14 V+R V+SENSE 4 ADM3052 13 CINT RxD 5 TOP VIEW (Not to Scale) 12 CANH TxD 6 11 CANL VDD1 7 10 VREF GND1 8 9 V– NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. 09292-006 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 2. Pin Configuration Table 8. Pin Function Descriptions Pin No. 1 2 3 4 Mnemonic NC GND1 GND1 V+SENSE 5 6 7 RxD TxD VDD1 8 9 10 11 12 13 14 GND1 V− VREF CANL CANH CINT V+R 15 16 V+ V− Description No Connect. Do not connect to this pin. Ground (Logic Side). Ground (Logic Side). Bus Voltage Sense. A low level on V+SENSE indicates that there is power connected on the bus on V+ and V−. A high level on V+SENSE indicates that power is not connected on the bus on V+ and V−. Receiver Output Data. Driver Input Data. Power Supply (Logic Side). Decoupling capacitor to GND1 required; capacitor value should be between 0.01 μF and 0.1 μF. Ground (Logic Side). Ground (Bus Side). Reference Voltage Output. Low Level CAN Voltage Input/Output. High Level CAN Voltage Input/Output. A capacitor of 1 μF, 10 V is required on this pin. Connect a 300 Ω, 750 mW resistor between V+R and V+. It is recommended that a 10 μF capacitor be fitted between V+R and GND2. Bus Power Connection. Connect a 300 Ω, 750 mW resistor between V+R and V+. Ground (Bus Side). Rev. B | Page 7 of 20 ADM3052 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 195 VDD1 = 3.3V, V+ = 25V VDD1 = 5V, V+ = 25V VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C 194 PROPAGATION DELAY TxD ON TO RECEIVER ACTIVE, tonRxD (ns) PROPAGATION DELAY TxD OFF TO RECEIVER INACTIVE, toffRxD (ns) 162 160 158 156 154 152 193 192 191 190 189 150 –15 10 35 60 85 TEMPERATURE (°C) 188 11 09292-023 148 –40 19 21 23 25 90 V+ = 25V 156 155 154 153 11 13 15 17 19 21 23 25 SUPPLY VOLTAGE, V+ (V) Figure 4. Propagation Delay from TxD On to Receiver Active vs. Supply Voltage, V+ VDD1 = 3.3V 80 VDD1 = 5V 75 70 65 60 –40 09292-024 152 85 –15 10 35 60 85 TEMPERATURE (°C) 09292-015 PROPAGATION DELAY, toffTxD (ns) VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C Figure 7. Propagation Delay from TxD Off to Bus Inactive vs. Temperature 85 250 VDD1 = 3.3V, V+ = 25V VDD1 = 5V, V+ = 25V PROPAGATION DELAY TxD OFF TO BUS INACTIVE, toffTxD (ns) 84 200 150 100 50 VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C 83 82 81 80 79 78 77 0 –40 –15 10 35 60 TEMPERATURE (°C) 85 09292-025 76 Figure 5. Propagation Delay from TxD Off to Receiver Inactive vs. Temperature 75 11 13 15 17 19 21 23 SUPPLY VOLTAGE, V+ (V) Figure 8. Propagation Delay from TxD Off to Bus Inactive vs. Supply Voltage, V+ Rev. B | Page 8 of 20 25 09292-029 PROPAGATION DELAY TxD ON TO RECEIVER ACTIVE, tonRxD (ns) 17 Figure 6. Propagation Delay from TxD Off to Receiver Inactive vs. Supply Voltage, V+ 157 PROPAGATION DELAY TxD OFF TO RECEIVER INACTIVE, toffRxD (ns) 15 SUPPLY VOLTAGE, V+ (V) Figure 3. Propagation Delay from TxD On to Receiver Active vs. Temperature 151 13 09292-026 164 Data Sheet 51 VDD1 = 3.3V, V+ = 25V VDD1 = 5V, V+ = 25V VDD1 = 3.3V, V+ = 25V VDD1 = 5V, V+ = 25V 50 PROPAGATION DELAY TxD ON TO BUS ACTIVE, tonTxD (ns) 50 49 48 47 46 48 47 46 –15 10 35 60 85 TEMPERATURE (°C) 44 –40 Figure 9. Propagation Delay from TxD On to Bus Active vs. Temperature 10 35 60 85 TEMPERATURE (°C) Figure 12. Propagation Delay from TxD On to Bus Active vs. Temperature 50 VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C 48 50 V+ = 11V, V+ = 18V, V+ = 25V, VDD1 = 5V, TA = 25°C VDD1 = 5V, TA = 25°C VDD1 = 5V, TA = 25°C 46 SUPPLY CURRENT, I+ (mA) PROPAGATION DELAY TxD ON TO BUS ACTIVE, tonTxD (ns) –15 09292-021 44 –40 51 49 45 45 09292-023 PROPAGATION DELAY TxD ON TO BUS ACTIVE, tonTxD (ns) 51 ADM3052 49 48 47 46 44 42 40 38 36 34 45 13 15 17 19 21 23 25 SUPPLY VOLTAGE, V+ (V) 30 100 09292-022 44 11 Figure 10. Propagation Delay from TxD On to Bus Active vs. Supply Voltage, V+ Figure 13. Supply Current (I+) vs. Data Rate (Across V+, VDD1 = 5 V) 1.2 VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C VDD1 = 3.3V, V+ = 24V, TA = 25°C VDD1 = 5V, V+ = 24V, TA = 25°C SUPPLY CURRENT, IDD1 (mA) 1.0 2.38 2.37 2.36 2.35 2.34 0.8 0.6 0.4 0.2 2.32 11 13 15 17 19 21 SUPPLY VOLTAGE, V+ (V) 23 25 0 100 Figure 11. Differential Output Voltage Dominant vs. Supply Voltage, V+ 1000 DATA RATE (kbps) 09292-020 2.33 09292-028 DIFFERENTIAL OUTPUT VOLTAGE DOMINANT, VOD (V) 2.40 2.39 1000 DATA RATE (kbps) 09292-019 32 Figure 14. Supply Current (IDD1) vs. Data Rate (VDD1 = 3.3 V, 5 V; V+ = 24 V) Rev. B | Page 9 of 20 ADM3052 Data Sheet 2.38 2.36 2.34 2.32 2.30 2.28 2.26 –40 –15 10 35 60 85 TEMPERATURE (°C) 40 20 10 35 2.80 VDD1 = 3.3V, TA = 25°C VDD1 = 5V, TA = 25°C REFERENCE VOLTAGE, VREF (V) 2.38 2.37 2.36 2.35 2.34 60 VCC VCC VCC VCC 2.75 2.33 85 = 5V, = 5V, = 5V, = 5V, IREF IREF IREF IREF = +50µA = –50µA = +5µA = –5µA 2.70 2.65 2.60 2.55 2.50 13 15 17 19 21 23 25 2.40 –40 –15 10 35 60 85 60 85 TEMPERATURE (°C) Figure 16. Driver Differential Output Voltage Dominant vs. Supply Voltage, V+ 09292-032 2.45 SUPPLY VOLTAGE, V+ (V) Figure 19. VREF vs. Temperature 4.895 85 VCC = 5V IOUT = –1.5mA V+SENSE ENABLE TIME, tSE (µs) 4.890 4.885 4.880 4.875 4.870 4.865 80 VDD1 = 3.3V 75 VDD1 = 5V 70 65 4.855 –40 –15 10 35 60 TEMPERATURE (°C) 85 Figure 17. Receiver Output High Voltage vs. Temperature 60 –40 –15 10 35 TEMPERATURE (°C) Figure 20. Enable Time, V+ High to V+SENSE Low vs. Temperature Rev. B | Page 10 of 20 09292-016 4.860 09292-031 RECEIVER OUTPUT HIGH VOLTAGE, VOH (V) –15 Figure 18. Receiver Output Low Voltage vs. Temperature 09292-033 DIFFERENTIAL OUTPUT VOLTAGE DOMINANT, VOD (V) 60 TEMPERATURE (°C) 2.40 2.32 11 80 0 –40 Figure 15. Driver Differential Output Voltage Dominant vs. Temperature 2.39 100 09292-030 RECEIVER OUTPUT LOW VOLTAGE, VOL (mV) 2.40 120 VDD1 = 3.3V, V+ = 25V VDD1 = 5V, V+ = 25V 09292-027 DIFFERENTIAL OUTPUT VOLTAGE DOMINANT, VOD (V) 2.42 Data Sheet ADM3052 VDD1 = 3.3V 660 VDD1 = 5V 650 640 630 620 610 600 –40 –15 10 35 60 85 TEMPERATURE (°C) Figure 21. Disable Time, V+ Low to V+SENSE High vs. Temperature 09292-017 V+SENSE DISABLE, tSD (µs) 670 8.56 8.54 VDD1 = 3.3V VDD1 = 5V 8.52 8.50 8.48 8.46 8.44 8.42 8.40 –40 –15 10 35 TEMPERATURE (°C) 60 85 09292-018 V+SENSE THRESHOLD VOLTAGE HIGH TO LOW (V) 680 Figure 22. Bus Voltage Sense Threshold Voltage High to Low vs. Temperature Rev. B | Page 11 of 20 ADM3052 Data Sheet TEST CIRCUITS CANH TxD RL RL 2 VCANH RL 2 CL CANL VOC VCANL RxD 09292-009 VOD 09292-007 TxD 15pF Figure 23. Driver Voltage Measurements Figure 25. Switching Characteristics Measurements VID RxD CL CANL 09292-008 CANH Figure 24. Receiver Voltage Measurements 1µF VDD1 CINT ISOLATION BARRIER 10µF RP VDD2 V+SENSE DECODE ENCODE V+ V+R LINEAR REGULATOR 100nF V+ BUS V+SENSE VDD2 PROTECTION ENCODE DECODE TxD DRIVER CANH RxD CANL RxD DECODE VREF REFERENCE VOLTAGE VREF GND2 GND2 DIGITAL ISOLATION ADM3052 V– CAN TRANSCEIVER GND1 LOGIC SIDE RL RECEIVER ENCODE BUS SIDE Figure 26. Supply Current Measurement Test Circuit Rev. B | Page 12 of 20 09292-010 TxD Data Sheet ADM3052 SWITCHING CHARACTERISTICS VDD1 0.7VDD1 VTxD 0.25V DD1 0V VOD VDIFF = VCANH – VCANL VDIFF 0.9V 0.5V VOR toffTxD tonTxD VDD1 VDD1 – 0.3V VRxD 0V tonRxD 09292-002 0.4V toffRxD Figure 27. Driver and Receiver Propagation Delay VRxD HIGH LOW VID (V) 0.9 0.5 09292-004 VHYS Figure 28. Receiver Input Hysteresis 25V V+SENSETH V+SENSETH V+ 0V tSD tSE VDD1 0.4V 0V Figure 29. V+SENSE Enable/Disable Time Rev. B | Page 13 of 20 09292-005 VDD1 – 0.3 V+SENSE ADM3052 Data Sheet CIRCUIT DESCRIPTION waveforms that are capable of exciting the primary transformer winding. At the secondary winding, the induced waveforms are decoded into the binary value that was originally transmitted. CAN TRANSCEIVER OPERATION A CAN bus has two states: dominant and recessive. A dominant state is present on the bus when the differential voltage between CANH and CANL is greater than 0.9 V. A recessive state is present on the bus when the differential voltage between CANH and CANL is less than 0.5 V. During a dominant bus state, the CANH pin is high and the CANL pin is low. During a recessive bus state, both the CANH and CANL pins are in the high impedance state. Positive and negative logic transitions at the input cause narrow (~1 ns) pulses to be sent to the decoder via the transformer. The decoder is bistable and is, therefore, set or reset by the pulses, indicating input logic transitions. In the absence of logic transitions at the input for more than ~1 μs, a periodic set of refresh pulses, indicative of the correct input state, is sent to ensure dc correctness at the output. If the decoder receives no internal pulses for more than about 5 μs, the input side is assumed to be unpowered or nonfunctional, in which case the output is forced to a default state (see Table 10 and Table 11). ELECTRICAL ISOLATION In the ADM3052, electrical isolation is implemented on the logic side of the interface. Therefore, the device has two main sections: a digital isolation section and a transceiver section (see Figure 30). The driver input signal, which is applied to the TxD pin and referenced to the logic ground (GND1), is coupled across an isolation barrier to appear at the transceiver section referenced to the isolated ground (V−). Similarly, the receiver input and V+, which are referenced to the isolated ground in the transceiver section, are coupled across the isolation barrier to appear at the RxD pin and V+SENSE referenced to the logic ground, respectively. TRUTH TABLES The truth tables in this section use the abbreviations shown in Table 9. Table 9. Truth Table Abbreviations Letter H L I X Z NC iCoupler Technology The digital signals transmit across the isolation barrier using iCoupler technology. This technique uses chip scale transformer windings to couple the digital signals magnetically from one side of the barrier to the other. Digital inputs are encoded into Description High level Low level Indeterminate Don’t care High impedance (off ) Disconnected Table 10. Transmitting VDD1 On On On Off On Supply Status V+ On On On On Off Input TxD L H Floating X L Bus State Dominant Recessive Recessive Recessive I CANH H Z Z Z I Outputs CANL L Z Z Z I V+SENSE L L L I H Table 11. Receiving Supply Status VDD1 On On On On Off On Inputs V+ On On On On On Off VID = CANH − CANL ≥ 0.9 V ≤ 0.5 V 0.5 V < VID < 0.9 V Inputs open X X Bus State Dominant Recessive I Recessive X X Rev. B | Page 14 of 20 RxD L H I H I H Outputs V+SENSE L L L L I H Data Sheet ADM3052 1µF VDD1 CINT ISOLATION BARRIER 10µF RP VDD2 V+SENSE DECODE ENCODE V+ V+R LINEAR REGULATOR 100nF V+ BUS V+SENSE VDD2 PROTECTION ENCODE DECODE DRIVER CANH RxD CANL RxD DECODE VREF REFERENCE VOLTAGE VREF GND2 GND2 DIGITAL ISOLATION ADM3052 V– CAN TRANSCEIVER GND1 LOGIC SIDE RL RECEIVER ENCODE BUS SIDE Figure 30. Digital Isolation and Transceiver Sections Rev. B | Page 15 of 20 09292-010 TxD TxD ADM3052 Data Sheet 100 MAGNETIC FIELD IMMUNITY The limitation on the magnetic field immunity of the iCoupler is set by the condition in which an induced voltage in the receiving coil of the transformer is large enough to either falsely set or reset the decoder. The following analysis defines the conditions under which this may occur. The 3 V operating condition of the ADM3052 is examined because it represents the most susceptible mode of operation. The pulses at the transformer output have an amplitude greater than 1 V. The decoder has a sensing threshold of about 0.5 V, thus establishing a 0.5 V margin in which induced voltages can be tolerated. The voltage induced across the receiving coil is given by d 2 V rn ; n 1, 2, . . . , N dt where: β is the magnetic flux density (gauss). N is the number of turns in the receiving coil. rn is the radius of the nth turn in the receiving coil (cm). 1 0.1 0.01 0.001 1k 100M Figure 31. Maximum Allowable External Magnetic Flux Density For example, at a magnetic field frequency of 1 MHz, the maximum allowable magnetic field of 0.2 kgauss induces a voltage of 0.25 V at the receiving coil. This is about 50% of the sensing threshold and does not cause a faulty output transition. Similarly, if such an event occurs during a transmitted pulse and is the worst-case polarity, it reduces the received pulse from >1.0 V to 0.75 V, still well above the 0.5 V sensing threshold of the decoder. Figure 32 shows the magnetic flux density values in terms of more familiar quantities, such as maximum allowable current flow at given distances away from the ADM3052 transformers. 1000 DISTANCE = 1m 100 DISTANCE = 5mm 10 DISTANCE = 100mm 1 0.1 0.01 1k Given the geometry of the receiving coil and an imposed requirement that the induced voltage is, at most, 50% of the 0.5 V margin at the decoder, a maximum allowable magnetic field can be determined using Figure 31. 10k 100k 1M 10M MAGNETIC FIELD FREQUENCY (Hz) 09292-012 The linear regulator takes the V+ bus power (ranging between 11 V to 25 V) and regulates this voltage to 5 V to provide power to the internal bus-side circuitry (iCoupler isolation, V+SENSE, and transceiver circuits). The linear regulator uses two regulation loops to share the power dissipation between the internal die and an external resistor. This reduces the internal heat dissipation in the package. The 300 Ω external resistor should be capable of dissipating 750 mW of power and have a tolerance of 1%. 10 10k 100k 1M 10M MAGNETIC FIELD FREQUENCY (Hz) 100M 09292-013 LINEAR REGULATOR MAXIMUM ALLOWABLE CURRENT (kA) The ADM3052 contains thermal shutdown circuitry that protects the device from excessive power dissipation during fault conditions. Shorting the driver outputs to a low impedance source can result in high driver currents. The thermal sensing circuitry detects the increase in die temperature under this condition and disables the driver outputs. This circuitry is designed to disable the driver outputs when a junction temperature of 150°C is reached. As the device cools, the drivers reenable at a temperature of 140°C. MAXIMUM ALLOWABLE MAGNETIC FLUX DENSITY (kGAUSS) THERMAL SHUTDOWN Figure 32. Maximum Allowable Current for Various Current-to-ADM3052 Spacings With combinations of strong magnetic field and high frequency, any loops formed by PCB traces can induce error voltages large enough to trigger the thresholds of succeeding circuitry. Care should be taken in the layout of such traces to avoid this possibility. Rev. B | Page 16 of 20 Data Sheet ADM3052 APPLICATIONS INFORMATION TYPICAL APPLICATIONS 3.3V/5V SUPPLY 1µF 100nF CINT VDD1 ISOLATION BARRIER 10µF ADM3052 VDD2 V+SENSE DECODE RP 100nF V+ BUS V+SENSE ENCODE V+ V+R LINEAR REGULATOR VDD2 CAN CONTROLLER BUS CONNECTOR PROTECTION TxD ENCODE DECODE V+ TxD DRIVER CANH CANH RxD RxD RECEIVER DECODE ENCODE VREF CANL REFERENCE VOLTAGE CANL V– GND2 GND2 RL VREF GND1 CAN TRANSCEIVER LOGIC SIDE BUS SIDE 09292-014 V– DIGITAL ISOLATION Figure 33. Typical Isolated CAN Node Using the ADM3052 DEVICENET™ AND THE ADM3052 CAN TRANSCEIVER DeviceNet is a digital multidrop network that connects actuators, sensors, and a broad range of industrial automation systems. DeviceNet is managed by the Open DeviceNet Vendor Association (ODVA) and is accepted by international standards bodies around the world, with a large number of companies offering DeviceNet products. The Communications and Information Protocol (CIP™) is a communications protocol for transferring automation data between two devices. DeviceNet is a combination of CIP™ (for upper layers of the network) and the CAN physical layer for the data link layer. DeviceNet allows up to 64 nodes on a single network, with node addresses ranging from 0 to 63. DeviceNet supports 125 kbps, 250 kbps, and 500 kbps data rates and supports master and slave as well as peer-to-peer communication. The ADM3052 can be used as the CAN physical layer transceiver for a DeviceNet implementation. Refer to the AN-1123 Application Note for a CAN implementation guide. DeviceNet supports both isolated and nonisolated physical layer design of devices. An isolated design option allows externally powered devices (for example, ac drive starters and solenoid valves) to share the same bus cable. DeviceNet requires the support of the standard industrial voltage range from 11 V dc to 25 V dc. The ADM3052 employs Analog Devices iCoupler technology, combines a 3-channel isolator, a CAN transceiver, and a linear regulator into a single package. Isolated power is supplied to the bus side of the ADM3052 by an isolated 24 V supply across the bus. The internal regulator provides the 5 V supply required internally by the CAN transceiver. The logic side of the ADM3052 requires a single 3.3 V or 5 V supply. Rev. B | Page 17 of 20 ADM3052 Data Sheet OUTLINE DIMENSIONS 10.50 (0.4134) 10.10 (0.3976) 9 16 7.60 (0.2992) 7.40 (0.2913) 8 1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122) 10.65 (0.4193) 10.00 (0.3937) 0.75 (0.0295) 45° 0.25 (0.0098) 2.65 (0.1043) 2.35 (0.0925) SEATING PLANE 8° 0° 0.33 (0.0130) 0.20 (0.0079) 1.27 (0.0500) 0.40 (0.0157) COMPLIANT TO JEDEC STANDARDS MS-013-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 03-27-2007-B 1 Figure 34. 16-Lead Standard Small Outline Package [SOIC_W] Wide Body (RW-16) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model1 ADM3052BRWZ ADM3052BRWZ-REEL7 EVAL-ADM3052EBZ 1 Temperature Range −40°C to +85°C −40°C to +85°C Package Description 16-Lead SOIC_W 16-Lead SOIC_W Evaluation Board Z = RoHS Compliant Part. Rev. B | Page 18 of 20 Package Option RW-16 RW-16 Data Sheet ADM3052 NOTES Rev. B | Page 19 of 20 ADM3052 Data Sheet NOTES ©2011–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09292-0-6/16(B) Rev. B | Page 20 of 20