AD261AND-1

Overview

The AD261AND-1 is a high-speed logic isolator manufactured by Analog Devices Inc. It features one input and four outputs, providing robust isolation for digital control signals. The device operates with an isolation test voltage of up to 3.5 kV rms and supports a minimum logic signal bandwidth of 20 MHz. Propagation delay is typically 14 ns, with waveform edge transmission symmetry maintained within ±1 ns. It functions as a replacement for multiple opto-isolators and includes field and system output enable/three-state capabilities.

Feature Summary

• Provides galvanic isolation for digital control signals between microcontrollers and field I/O components
• Maintains waveform edge transmission symmetry for accurate time-based PWM signal isolation
• Supports three-state output functionality for easy multiplexing and power-up logic level 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 AND-1 confirms the 1-input, 4-output configuration. Confirm package type matches requirements. Check for moisture sensitivity handling instructions. Ensure compatibility with existing isolation voltage ratings in the design.

Selection Notes

Select this component when replacing multiple discrete opto-isolators with a single integrated solution. Consider the 20 MHz bandwidth and 14 ns propagation delay for high-speed applications. Verify that the 3.5 kV rms isolation rating meets safety standards for the target environment.

Part Context

The AD261 series is designed to isolate five digital control signals. The AD261AND-1 variant specifically offers one input and four outputs. It effectively replaces up to five opto-isolators, simplifying circuit design while maintaining high-speed performance and reliable signal transmission across isolation barriers.

FAQ

What is the maximum isolation test voltage for the AD261AND-1?

The AD261AND-1 has an isolation test voltage of up to 3.5 kV rms.

How does the AD261AND-1 handle output enabling?

All field or system output pins can be set to a high resistance three-state level using the two enable pins.