ADUM1250

Part: ADuM1250/ADuM1251 from Analog Devices

Type: Hot Swappable, Dual I2C Isolators

Key Specs:

• Current Sink Capability: 30 mA
• Operation Frequency: 1000 kHz
• Supply/Logic Levels: 3.0 V to 5.5 V
• High Temperature Operation: 125°C
• Isolation Voltage (VIORM): 560 V peak
• Isolation Voltage (VISO): 2500 V rms for 1 minute

Features:

• Bidirectional I2C communication
• Open-drain interfaces
• Suitable for hot swap applications
• 30 mA current sink capability
• 1000 kHz operation
• 3.0 V to 5.5 V supply/logic levels
• 8-lead, RoHS compliant SOIC package
• High temperature operation: 125°C
• Qualified for automotive applications
• Safety and regulatory approvals: DIN EN IEC 60747-17 (VDE 0884-17), UL 1577, IEC/EN/CSA 62368-1, IEC/CSA 61010-1, CQC GB4943.1
• ADuM1250 provides two bidirectional channels
• ADuM1251 provides one bidirectional channel and one unidirectional channel
• Contains hot swap circuitry to prevent glitching data when an unpowered card is inserted onto an active bus
• Based on iCoupler chip scale transformer technology

Applications:

• Isolated I2C, SMBus, or PMBus interfaces
• Multilevel I2C interfaces
• Power supplies
• Networking
• Power over Ethernet
• Hybrid electric vehicle battery management

Package:

• SOIC: 8-lead, RoHS compliant

• ► Bidirectional I2C communication
• ► Open-drain interfaces
• ► Suitable for hot swap applications
• ► 30 mA current sink capability
• ► 1000 kHz operation
• ► 3.0 V to 5.5 V supply/logic levels
• ► 8-lead, RoHS compliant SOIC package
• ► High temperature operation: 125°C
• ► Qualified for automotive applications
• ► Safety and regulatory approvals
  • ► DIN EN IEC 60747-17 (VDE 0884-17)
    • ► VIORM = 560 V peak
  • ► UL 1577
    • ► VISO = 2500 V rms for 1 minute
  • ► IEC/EN/CSA 62368-1
  • ► IEC/CSA 61010-1
  • ► CQC GB4943.1

• ► Isolated I2C, SMBus, or PMBus interfaces
• ► Multilevel I2C interfaces
• ► Power supplies
• ► Networking
• ► Power over Ethernet
• ► Hybrid electric vehicle battery management

Figure 4. ADuM1250/ADuM1251 Pin Configuration

Table 8. ADuM1250 Pin Function Descriptions

Table 9. ADuM1251 Pin Function Descriptions

All voltages are relative to their respective ground. All minimum and maximum specifications apply over the entire recommended operating range, unless otherwise noted. All typical specifications are at T^A = 25°C, VDD1 = 3.3 V or 5 V, and VDD2 = 3.3 V or 5 V, unless otherwise noted.

Table 1. Electrical Characteristics

^{1 V}IL < 0.5 V, VIH > 0.7 V.

² ΔVS1 = VS1OL - VS1T. This is the minimum difference between the output logic low level and the input logic threshold within a given component. This ensures that there is no possibility of the part latching up the bus to which it is connected.

Ambient temperature = 25°C, unless otherwise noted.

Table 6. Absolute Maximum Ratings

¹ All voltages are relative to their respective ground.

² Refers to common-mode transients across the insulation barrier. Commonmode transients exceeding the absolute maximum rating may cause latch-up or permanent damage.

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.

Thermal performance is directly linked to PCB design and operating environment. Careful attention to the PCB thermal design is required.

Thermal resistance and characterization parameter values specified in Table 7 are defined and calculated based on the JEDEC JESD51 standards. For more details on their definition and usage, see JEDEC JESD51-12 and the Thermal Analysis section.

Table 7. Package Thermal Data

¹ Thermal impedance simulated values are based on JEDEC 2S2P thermal test board with no vias and still air.