ISO7840FDW

Overview

The ISO7840FDW is a quad-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It utilizes capacitive coupling technology to provide electrical isolation with a maximum insulation voltage of 5700 Vrms. The device supports unidirectional data transmission at rates up to 100 Mb/s and features a typical propagation delay of 11 ns. It operates on a supply voltage range of 2.25 V to 5.5 V, with a maximum power dissipation of 200 mW. The component is rated for an operating temperature range from -55°C to +125°C and offers a common-mode transient immunity of 100 kV/µs.

Feature Summary

• Provides high-reliability galvanic isolation between circuits using capacitive coupling technology.
• Integrates four independent unidirectional channels within a single compact package.
• Ensures signal integrity under high electromagnetic interference with high common-mode transient immunity.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing reinforced safety barriers
• Power electronics control interfaces

Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-16 package and tube packaging configuration. Ensure compatibility with the required 2.25 V to 5.5 V supply rails. Confirm that the unidirectional channel configuration meets the system's signal flow requirements. Check for moisture sensitivity level compliance during storage and handling procedures.

Selection Notes

Select this component when four isolated unidirectional channels are required in a small footprint. It is suitable for applications demanding high insulation voltage ratings and fast data rates. Consider the thermal performance and power dissipation limits relative to the ambient operating conditions. Verify that the 100 Mb/s data rate aligns with the communication protocol speed requirements.

Part Context

This part belongs to the ISO7840 family of digital isolators designed for general-purpose isolation applications. It serves as a key interface component for separating noisy digital domains from sensitive control logic. The device complements other members of the ISO78xx series which offer varying channel counts and bidirectional capabilities.

Replacement Considerations

ISO7840DWWR is listed as a parameter-equivalent alternative offering similar specifications in a tape-and-reel format.