ISO7840DWW

Overview

The ISO7840DWW is a high-performance, quad-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC tube package. It features reinforced isolation with an 8000 VPK peak voltage rating and 5700 Vrms insulation voltage. The device supports data rates up to 100 Mbps with a typical propagation delay of 11 ns and common-mode transient immunity of 100 kV/µs. Operating on a single supply voltage range of 2.25 V to 5.5 V, it provides four unidirectional channels with no shutdown functionality. The component operates within a temperature range of -55°C to +125°C and utilizes capacitive coupling technology for signal transmission across the isolation barrier.

Feature Summary

• Provides reinforced digital isolation with high peak voltage withstand capability for safety-critical applications
• Offers four independent unidirectional signal channels for efficient multi-line data transmission
• Ensures signal integrity through high common-mode transient immunity and low pulse width distortion

Applications

• Industrial automation systems requiring galvanic isolation between control and power stages
• Medical equipment needing reinforced isolation for patient safety compliance
• Power electronics interfaces such as motor drives and inverter controls
• Smart grid infrastructure and metering devices demanding high-voltage isolation

Procurement Notes

Verify that the specific part number suffix corresponds to the tube packaging format, as other variants may utilize reel or cut tape configurations. Confirm that the application environment remains within the specified operating temperature range of -55°C to +125°C. Ensure that the system design accounts for the 2.25 V to 5.5 V supply voltage requirements on both sides of the isolation barrier. Check for any regional distribution restrictions or humidity sensitivity handling requirements during storage and assembly processes.

Selection Notes

Select this component when reinforced isolation ratings are mandatory rather than basic isolation standards. Consider the 16-pin SOIC footprint constraints against available board space. Evaluate the 100 Mbps data rate requirement against higher-speed alternatives if necessary. Assess the power consumption characteristics relative to thermal management capabilities in enclosed industrial enclosures.

Part Context

This device belongs to the ISO784x family of quad-channel digital isolators from Texas Instruments. It shares architectural similarities with the ISO7840DWWR variant but differs in packaging configuration. The series is designed for applications requiring robust signal isolation in noisy electrical environments. It complements other interface solutions by providing a compact, high-reliability alternative to traditional optocouplers.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.