ISO7240ADW

Overview

The ISO7240ADW is a quad-channel digital isolator from Texas Instruments utilizing capacitive coupling technology. It provides four independent signal paths with unidirectional data flow, supporting a maximum data rate of 1 Mbps. The device operates within a supply voltage range of 3.15 V to 5.5 V and offers an isolation voltage rating of 2500 Vrms. It features a common-mode transient immunity (CMTI) of 25 kV/µs and typical propagation delays of 42 ns. Packaged in a 16-pin SOIC, it functions across an industrial temperature range of -40°C to 125°C.

Feature Summary

• Provides four isolated channels for bidirectional or unidirectional signal transmission
• Utilizes silicon dioxide (SiO2) insulation barrier for high reliability
• Supports high common-mode transient immunity to prevent false triggering
• Operates without requiring isolated power supplies on the secondary side

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment signal conditioning circuits
• Power electronics control interfaces
• General-purpose digital communication isolation

Procurement Notes

Verify component status as the ISO7240ADW is listed as obsolete by the manufacturer. Confirm availability through authorized distributors or surplus suppliers. Ensure compatibility with replacement parts such as the ISO6740 series if new production is required. Check datasheet revisions for any specific handling or storage requirements associated with end-of-life inventory.

Selection Notes

Select this component when four isolated channels are needed at lower data rates compared to higher-speed variants. Consider the 16-pin SOIC package constraints for PCB layout. Evaluate the 2500 Vrms isolation rating against system safety standards. Compare CMTI specifications with application noise environments to ensure signal integrity.

Part Context

Part of the ISO724x family of digital isolators designed for robust signal transmission across isolation barriers. The ADW suffix indicates a wide-body SOIC package suitable for enhanced creepage and clearance distances. This series supports various channel configurations including quad, dual, and single channel options.

Replacement Considerations

Texas Instruments recommends the ISO6740DWR as a functional replacement. Verify pinout compatibility and electrical parameter alignment before substitution.