AD261BND-4

Overview

The AD261BND-4 is a high-speed digital isolator from Analog Devices, designed to isolate five digital control signals between a microcontroller and field I/O components. It provides an isolation test voltage of up to 3.5 kVrms and features a minimum logic signal bandwidth of 20 MHz with a propagation delay of 14 ns. The device offers a common-mode transient immunity of 10 kV/µs and maintains waveform edge transmission symmetry within ±1 ns. Packaged in a 22-pin DIP, it effectively replaces multiple opto-isolators and supports operation over an extended temperature range.

Feature Summary

• Provides galvanic isolation for five digital control signal lines
• Maintains precise waveform edge transmission symmetry for accurate timing applications
• Features independent enable/three-state functions for system output control
• Offers high common-mode transient immunity for robust noise rejection

Applications

• PLC and DCS analog input/output cards
• IGBT motor drive controls
• High-speed digital I/O ports
• General data acquisition systems

Procurement Notes

Verify the specific suffix 'BND-4' against official Analog Devices documentation to confirm the exact pinout and configuration. Ensure compliance with RoHS status requirements, as this part may contain lead. Confirm that the 22-DIP package matches your PCB footprint constraints before procurement.

Selection Notes

Select this component when isolating five digital channels with high speed and precision timing is required. It serves as a direct replacement for up to five discrete opto-isolators, reducing board space and complexity. Consider the 22-pin DIP package availability and the specific I/O configuration provided by the '-4' suffix variant.

Part Context

The AD261 series consists of general-purpose digital isolators designed for microcontroller-to-field I/O communication. The AD261BND-4 represents a specific configuration within this family, offering five isolated logic lines. It belongs to the broader category of high-speed logic isolators manufactured by Analog Devices for industrial and communications applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.