AMC1411DWLR

Overview

The AMC1411DWLR is a precision, single-ended input isolated amplifier featuring a high-impedance analog input optimized for connection to resistive dividers. It utilizes a capacitive isolation barrier with reinforced insulation certified to DIN VDE V 0884-11 and UL 1577 standards, supporting up to 7.5 kV RMS isolation and 1600 VRMS working voltage. The device operates on 3.3-V or 5-V supplies on both sides, providing a fixed gain of 1.0 V/V with low DC errors including ±1.5 mV offset error and ±0.2% gain error. It delivers a minimum common-mode transient immunity (CMTI) of 100 kV/μs and functions within an extended industrial temperature range of –40°C to +125°C.

Feature Summary

• High-impedance input stage optimized for connecting to high-resistance voltage signal sources
• Reinforced galvanic isolation barrier certified for safety compliance under international standards
• Low DC error performance ensuring accurate voltage sensing across wide temperature ranges
• Integrated shutdown control pin for managing power consumption in standby states

Applications

• Isolated voltage sensing in motor drives
• Voltage monitoring in solar inverters
• Voltage measurement in wind turbine inverters
• Isolation in rail transport systems

Procurement Notes

Verify the specific ordering suffix 'DWLR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the component meets the necessary environmental certifications for the target application's regulatory requirements. Ensure the design accommodates the specified thermal resistance values to maintain junction temperatures within safe operating limits during continuous operation.

Selection Notes

Select this component when interfacing with high-impedance sensors or resistive dividers rather than low-impedance shunt resistors. The fixed unity gain simplifies circuit design for direct voltage scaling applications. Consider the package creepage distance requirements if the application demands higher isolation distances than the standard stretched SOIC provides.

Part Context

This part belongs to the AMC141x family of precision isolated amplifiers from Texas Instruments. It is specifically designed for high-voltage sensing applications where electrical isolation is critical for system safety and signal integrity. The device complements other members of the series by offering a dedicated solution for high-impedance inputs, distinguishing it from variants optimized for low-impedance current sensing.

Replacement Considerations

Direct replacements include other AMC141x family members such as the AMC1411DWR or AMC1411DR, which share identical functional specifications but may differ in packaging type or reel quantity. Verify pin compatibility and insulation ratings before substitution.