AMC1200STDUBRQ1

Overview

The AMC1200STDUBRQ1 is a fully-differential isolation amplifier from Texas Instruments, designed for high-precision current sensing applications. It features a ±250-mV input voltage range optimized for shunt resistors and provides a fixed gain of 8 V/V with 0.5% accuracy. The device utilizes a silicon dioxide (SiO2) barrier for galvanic isolation, certified to UL1577 and IEC60747-5-2 standards with an insulation voltage of 5 kV rms. It operates on a single 3-V to 5.5-V supply, drawing a maximum low-side supply current of 8 mA at 5 V. Key electrical characteristics include a gain bandwidth product of 280 kHz, a common-mode rejection ratio of 108 dB, and an input offset voltage of 200 µV. It supports differential inputs and outputs, functioning within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• High magnetic immunity provided by a silicon dioxide isolation barrier
• Optimized for direct connection to shunt resistors in current sensing
• Certified galvanic isolation ensuring safety in high-voltage environments
• Low power consumption suitable for energy-constrained systems

Applications

• Motor control systems requiring precise current regulation
• Green energy inverters and converters
• Uninterruptible power supplies (UPS)
• Frequency drives and variable speed drives

Procurement Notes

Verify the Q1 suffix indicates AEC-Q100 automotive qualification. Confirm the DUBR package designation corresponds to the SOIC-8 tape and reel format. Ensure the C grade matches the required temperature and performance specifications for the target application environment.

Selection Notes

Select this component when automotive-grade reliability is required alongside high-precision current monitoring. The fixed gain of 8 simplifies signal conditioning design. Compare against non-automotive variants like the AMC1200CDUBR if automotive certification is not mandatory. Consider the 100-kHz bandwidth for dynamic load requirements.

Part Context

This part belongs to the AMC1200 family of fully-differential isolation amplifiers. It shares core architecture with the AMC1200BDUB but includes specific automotive qualification markings. The family is designed to replace traditional transformer-based isolators in modern power electronics.

Replacement Considerations

Public confirmed substitute: AMC1200CDUBR.