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ISO7331CQDWQ1

TIISO7331CQDWQ1

Texas Instruments
General Purpose Digital Isolator 3000Vrms 3 Channel 25Mbps 25kV/µs CMTI 16-SOIC (0.295", 7.50mm Width)
NRND2,791 in stock
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Overview

The ISO7331CQDWQ1 is an automotive-qualified, three-channel digital isolator providing up to 3000Vrms isolation. It supports data rates up to 25Mbps and features integrated noise filters on the inputs to ensure robust signal integrity in electrically noisy environments. This device is designed for level translation between 3.3V and 5V systems while maintaining high transient immunity.

Why Choose This Part

This isolator offers high common-mode transient immunity (CMTI) of 70-kV/microsecond, ensuring reliable data transfer during fast voltage transients. Its low power consumption of approximately 1.4mA per channel at 1Mbps and a 25-year isolation barrier life make it a highly reliable alternative to traditional optocouplers.

Applications

Industrial Fieldbus
Provides galvanic isolation for ProfiBus, ModBus, and DeviceNet data buses to prevent ground loops in long-cable runs.
Automotive Signal Isolation
AEC-Q100 qualified for use in vehicle subsystems requiring isolated communication between high-voltage battery areas and low-voltage control logic.
Motor Control Interfaces
Isolates PWM control signals and feedback paths in servo drives and motor controllers to protect sensitive MCU logic from switching noise.

Getting Started

When designing with the ISO7331CQDWQ1, ensure that 0.1-microfarad ceramic bypass capacitors are placed as close as possible to the VCC pins on both sides of the isolation barrier. Engineers should consult the TI ISO73xx evaluation module (EVM) documentation for recommended PCB creepage and clearance layout techniques to maintain the 3000Vrms rating.