ISO7731QDBQRQ1

Overview

The ISO7731QDBQRQ1 is a Texas Instruments automotive-grade digital isolator featuring three independent channels in a 16-lead SSOP package. It operates on a single supply voltage ranging from 2.25V to 5.5V and supports data rates up to 100Mbps. The device provides a reinforced isolation voltage of 3000Vrms with a minimum common-mode transient immunity (CMTI) of 85kV/µs. Propagation delays are specified at a maximum of 16ns for both high-to-low and low-to-high transitions, with pulse width distortion capped at 4.9ns. It functions within an industrial temperature range of -40°C to 125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for robust reliability
• Capacitive coupling technology ensures high-speed signal transmission with low power consumption
• Reinforced insulation design meets stringent safety requirements for isolated circuits

Applications

• Automotive battery management systems
• Inverter control gate drivers
• On-board charger interfaces

Procurement Notes

Verify the complete part number including suffixes to ensure correct packaging and temperature grade. Confirm that the specific variant matches the required isolation voltage and channel configuration for the target application. Cross-reference datasheet revisions to ensure compatibility with existing design specifications and regulatory compliance requirements.

Selection Notes

Select this component when automotive certification and high CMTI are critical for system stability. The triple-channel configuration suits applications requiring multiple isolated signals within a compact footprint. Ensure the operating voltage aligns with the 2.25V to 5.5V input range and verify thermal management capabilities for the SSOP package under maximum load conditions.

Part Context

This device belongs to the ISO77x1-Q1 family of reinforced digital isolators designed for harsh electromagnetic environments. It utilizes Texas Instruments' silicon dioxide (SiO2) isolation technology to provide superior performance compared to traditional polymer or air gap solutions. The Q1 suffix denotes its qualification for automotive applications, ensuring long-term availability and consistency for production vehicles.

Replacement Considerations

Direct replacements include other members of the ISO773x-Q1 family, such as the ISO7731QDWRQ1 for SOIC-16 packages. Verify pinout compatibility and electrical parameters before substitution. Non-Texas Instruments alternatives require careful evaluation of isolation ratings and CMTI specifications to match automotive safety standards.