ISO7240ADWG4

Overview

The ISO7240ADWG4 is a quad-channel digital isolator manufactured by Texas Instruments, utilizing capacitive coupling technology for signal transmission. It features four forward channels and zero reverse channels, operating at a data rate of 1 Mbps with a maximum propagation delay of 15 ns. The device supports a supply voltage range from 3.15 V to 5.5 V and draws a typical operating current of 17 mA. It provides an insulation voltage of 4000 Vrms and offers a common-mode transient immunity of 50 kV/µs. The component is housed in a 16-pin SOIC package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation between circuits using high-reliability capacitive coupling technology.
• Features unidirectional signal transmission across four independent channels.
• Designed for general-purpose applications requiring robust noise immunity and low power consumption.

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing safe patient isolation barriers
• Power electronics control circuits with high-voltage separation requirements

Procurement Notes

Verify the specific suffix 'DWG4' to ensure the correct SOIC-16 package and lead-free RoHS compliance status. Confirm that the 1 Mbps speed rating matches system timing requirements, as higher-speed variants exist within the same family. Check for end-of-life notices or obsolescence warnings, as availability may be limited. Ensure the 4000 Vrms isolation rating meets safety standards for the target application environment.

Selection Notes

Select this component when a quad-channel isolator with 1 Mbps speed is sufficient for the application. Consider the ISO7240CDWR if a higher 25 Mbps data rate is required, noting the difference in insulation voltage ratings. Evaluate the physical footprint constraints of the 16-SOIC package against available PCB space. Verify that the 3.15 V to 5.5 V supply range aligns with the system's power rails.

Part Context

This part belongs to the ISO7240A series of quad digital isolators from Texas Instruments. It is distinct from the ISO7240C series, which typically offers higher data rates such as 25 Mbps. The ISO7240A series is optimized for applications where moderate speed and high reliability are prioritized over maximum throughput. It serves as a key component in interface isolation strategies for mixed-signal systems.

Replacement Considerations

The ISO6740DWR is listed as a substitute option. Verify pinout compatibility and electrical specifications before swapping. Note that the ISO7240CDW is a related variant but differs in data rate (25 Mbps) and potentially insulation voltage depending on the specific datasheet version.

FAQ

What is the common-mode transient immunity (CMTI) of the ISO7240ADWG4?

The ISO7240ADWG4 has a common-mode transient immunity of 50 kV/µs.

Does the ISO7240ADWG4 support bidirectional communication?

No, the ISO7240ADWG4 is configured with four forward channels and zero reverse channels, supporting only unidirectional signal transmission.