AMC1200SDUB

Overview

The AMC1200SDUB is a fully differential precision isolation amplifier manufactured by Texas Instruments. It features a silicon dioxide (SiO2) barrier providing galvanic isolation with a rated voltage of 4 kV peak and 1200 V working voltage. The device operates on a single supply ranging from 2.7 V to 5.5 V, consuming a maximum supply current of 5.4 mA. It offers a fixed gain of 8 V/V with an input bandwidth of 100 kHz and a common-mode rejection ratio of 95 dB. The input offset voltage is typically 0.2 mV, and it supports operation within an extended industrial temperature range of -40°C to +105°C.

Feature Summary

• Utilizes a silicon dioxide barrier for high electromagnetic interference resistance and galvanic isolation
• Optimized ±250-mV input voltage range designed for direct connection to shunt resistors
• Provides certified current isolation compliant with UL1577 and VDE V0884-10 standards
• Features low power consumption suitable for high-side and low-side applications

Applications

• Current sensing in motor control systems
• Green energy and inverter applications
• Uninterruptible power supplies (UPS)
• Frequency converters

Procurement Notes

Verify the specific suffix 'SDUB' corresponds to the SOP-8 bulk package configuration when sourcing. Confirm that the required isolation voltage rating meets the system's safety certification requirements, as different variants may offer distinct insulation characteristics. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component for applications requiring precise current measurement where electrical isolation is critical. The fixed gain of 8 simplifies signal conditioning compared to programmable alternatives. Consider the 100 kHz bandwidth for dynamic load monitoring. Evaluate the 4 kV isolation barrier against the system's transient immunity needs. This part is suitable for replacing older linear optocoupler-based solutions in compact designs.

Part Context

This device belongs to the AMC1200 family of isolation amplifiers from Texas Instruments. It shares the core architecture with variants like the AMC1200BDUBR but differs in packaging and thermal grade specifications. The family is designed to replace traditional transformer and optocoupler isolators, offering superior linearity and lower noise performance for modern power electronics and industrial automation systems.

Replacement Considerations

AMC1200BDUBR serves as a functional substitute within the same series, sharing identical electrical parameters and pinouts while differing primarily in packaging type.