ISO7731FQDBQRQ1

Overview

The ISO7731FQDBQRQ1 is a general-purpose digital isolator from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features three independent channels using capacitive coupling technology to provide electrical isolation. The device supports data rates up to 100 Mbps and offers a minimum common-mode transient immunity of 85 kV/µs. It operates within a supply voltage range of 2.25 V to 5.5 V and functions reliably across an extended temperature range of -40°C to +125°C. Packaged in a 16-SSOP form factor, it ensures robust signal integrity in noisy environments.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards
• High-speed data transmission capability at 100 Mbps
• Robust electromagnetic compatibility with high common-mode transient immunity
• Wide operating temperature range suitable for harsh environments

Applications

• Automotive electronic control units requiring isolated communication
• Industrial systems needing reliable galvanic isolation
• On-board charging infrastructure for electric vehicles

Procurement Notes

Verify the specific suffix Q1 confirms automotive grade status and AEC-Q100 compliance. Ensure the DBQR package variant matches your PCB footprint requirements. Confirm that the F designation indicates the intended functional specifications for your design. Cross-reference datasheet revisions to ensure compatibility with existing system designs.

Selection Notes

Select this component when automotive certification is mandatory for the application. Choose this part if high common-mode transient immunity is critical for signal integrity. Consider this isolator for designs requiring three independent channels in a compact surface-mount package. Verify power supply constraints align with the specified voltage range before integration.

Part Context

This device belongs to the ISO7731 family of triple-channel digital isolators. It shares architectural similarities with other members like the ISO7731QDBQRQ1 but includes specific automotive qualifications. The series is known for combining high speed with robust EMC performance in a small footprint.

Replacement Considerations

ISO7731QDBQRQ1 serves as a direct functional substitute within the same family. Both parts share identical channel counts and core isolation technologies. Verify packaging and thermal characteristics match before swapping components.