ZXCT1081QE5TA

Overview

The ZXCT1081QE5TA is a high-side current sense monitor manufactured by Diodes Incorporated. It provides a voltage output proportional to the sensed load current, eliminating the need to disrupt the ground plane. The device features a gain of 10 and supports a wide input voltage range from 3V to 40V continuous, with 60V transient capability suitable for automotive applications. It operates on a separate supply pin (VCC) ranging from 4.5V to 12V, ensuring functionality under short-circuit conditions. The component is housed in an SOT-23-5 package and is qualified to AEC-Q100 standards for automotive use.

Feature Summary

• High-side current sensing without ground plane disruption
• Separate VCC pin enables operation during short-circuit events
• Automotive qualification with 60V transient capability

Applications

• Industrial systems operating from 24V or 28V rails
• Power supply monitoring
• Automotive load current sensing

Procurement Notes

Verify the specific suffix 'QE5TA' against the manufacturer's official datasheet to confirm it denotes the automotive-grade variant with AEC-Q100 qualification. Ensure the ordering code matches the exact package type and temperature range requirements. Cross-reference the part number with the latest Diodes Incorporated documentation to avoid confusion with non-automotive versions.

Selection Notes

Select this component when ground integrity is critical and high-side monitoring is required. The separate supply rail allows the device to remain active even if the main line shorts, providing a definitive end-stop voltage. Verify that the system's supply voltage falls within the specified 4.5V to 12V range for VCC while the sense voltage remains within the 3V to 40V operational window.

Part Context

This part belongs to the ZXCT108x series of current monitors from Diodes Incorporated. The series is designed for precise current measurement in power management applications. The 'Q' prefix typically indicates automotive grade qualification, distinguishing it from standard industrial variants within the same functional family.

Replacement Considerations

Direct substitutes include other parts from the ZXCT108x series, such as the ZXCT1082 or ZXCT1083, provided they meet the specific voltage and accuracy requirements. Verify pin compatibility and gain specifications before substitution.