ISO7731FQDWRQ1

Overview

The ISO7731FQDWRQ1 is a Texas Instruments automotive-grade digital isolator featuring three channels with a 2/1 input-output configuration. It utilizes capacitive coupling technology to provide reinforced isolation rated at 5000 Vrms. The device supports data rates up to 100 Mb/s and offers a common-mode transient immunity of 85 kV/µs. Operating within a supply voltage range of 2.25 V to 5.5 V, it functions reliably across temperatures from -55°C to +125°C. Packaged in a 16-pin SOIC (DW) surface-mount format, it meets AEC-Q100 qualification standards for robust performance in demanding environments.

Feature Summary

• Provides reinforced electrical isolation via capacitive coupling technology for high noise immunity
• Automotive qualified under AEC-Q100 standards for reliability in vehicle applications
• Features unidirectional signal transmission with a 2-input to 1-output channel architecture

Applications

• Automotive electronic control units requiring galvanic isolation
• Inverter gate drive circuits in electric vehicles
• On-board charging systems for hybrid and electric vehicles

Procurement Notes

Verify the specific suffix 'F' indicates the required insulation rating and package type during sourcing. Confirm that the 'Q1' designation aligns with your project's automotive qualification requirements. Ensure the 16-SOIC footprint matches your PCB layout constraints. Cross-reference the datasheet revision to confirm parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when reinforced isolation ratings are mandatory for safety compliance. The 5000 Vrms capability distinguishes it from basic isolation variants. Consider the 100 Mb/s speed limit against higher-speed application needs. The wide operating temperature range suits harsh automotive thermal conditions without additional cooling measures.

Part Context

This part belongs to the ISO7731-Q1 family of triple-channel digital isolators. It shares the same functional core as the ISO7731 series but includes automotive-specific qualification. The 'F' suffix typically denotes the reinforced insulation barrier version, while 'Q1' confirms automotive grade status. It complements other members like the ISO7731DBQRQ1 which may offer different isolation ratings or packages.

Replacement Considerations

ISO7731FQDBQRQ1 offers identical specifications in an SSOP-16 package instead of SOIC-16.