AD261BND-3

Overview

The AD261BND-3 is a high-speed digital isolator designed to isolate five digital control signals between a microcontroller and field I/O components. It features a minimum logic signal bandwidth of 20 MHz and a propagation delay of 14 ns. The device offers a common-mode transient immunity (CMTI) of 10 kV/µs min and an isolation test voltage up to 3.5 kVrms. It operates over a temperature range of -25°C to +85°C and effectively replaces up to five opto-isolators.

Feature Summary

• Provides five isolated logic lines with configurable input/output combinations
• Maintains waveform edge transmission symmetry within ±1 ns for accurate PWM isolation
• Includes field and system output enable/three-state functions for multiplexing and power-up presetting

Applications

• PLC/DCS Analog Input and Output Cards
• IGBT Motor Drive Controls
• High Speed Digital I/O Ports

Procurement Notes

Verify the specific suffix BND-3 against official Analog Devices documentation to confirm pinout, package type, and electrical characteristics. Ensure compatibility with existing board layouts and isolation requirements before procurement.

Selection Notes

Select this component when replacing multiple opto-isolators with a single chip solution requiring high speed and precise timing symmetry. Consider the 20 MHz bandwidth and 14 ns delay for applications demanding fast data transmission and accurate pulse width modulation isolation.

Part Context

Part of the AD261 family of high-speed logic isolators. This series allows various I/O configurations from five input lines to five output lines. The AD261BND-3 specifically utilizes a DIP-18 package format suitable through-hole mounting.

Replacement Considerations

Direct replacement for legacy opto-isolator arrays in industrial control systems. Verify that the 3.5 kVrms isolation rating meets the safety standards of the target application.