AMC1200BDUBR

Overview

The AMC1200BDUBR is a precision, fully-differential isolation amplifier manufactured by Texas Instruments. It utilizes a silicon dioxide (SiO2) barrier to provide galvanic isolation between input and output circuits. Key electrical parameters include a fixed gain of 8 V/V with a maximum gain error of 0.075%, a 3dB bandwidth of 100 kHz, and a common-mode rejection ratio (CMRR) of 108 dB. The device operates on supply voltages ranging from 2.7 V to 5.5 V, drawing a typical operating current of 5.4 mA. It features an input offset voltage of 200 µV and supports differential outputs with a channel output current capability of 20 mA. The component is housed in an SOP-8 package and is rated for operation within a temperature range of -40°C to +105°C.

Feature Summary

• Galvanic isolation via high magnetic immunity silicon dioxide barrier
• Optimized for shunt resistor applications with ±250 mV input range
• Low nonlinearity and low offset error characteristics
• Certified isolation voltage ratings under UL and IEC standards

Applications

• Shunt-based current sensing in motor control systems
• Green energy and inverter applications
• Uninterruptible power supply (UPS) monitoring

Procurement Notes

Verify the specific suffix 'B' indicates the extended accuracy grade compared to standard variants. Confirm the 'DUBR' suffix corresponds to the SOP-8 surface-mount package and tape-and-reel delivery format. Ensure compatibility with required isolation certification standards such as UL1577 or IEC60747-5-2 for the target application safety requirements.

Selection Notes

Select this component when high-precision current measurement is required in noisy environments. The fixed gain of 8 simplifies design calculations for shunt-based sensing. Consider the 100 kHz bandwidth and 108 dB CMRR for applications requiring fast response and high noise immunity. Verify that the SOP-8 footprint fits the PCB layout constraints.

Part Context

This part belongs to the AMC1200 family of fully-differential isolation amplifiers. It is designed to replace traditional transformer or optocoupler-based isolation solutions. The device integrates the isolation barrier and signal conditioning into a single monolithic structure, reducing system complexity and board space while maintaining high accuracy over the industrial temperature range.

Replacement Considerations

AMC1200SDUBR is a verified substitute within the same series offering similar isolation and performance specifications.