AMC1311DWVR

Overview

The AMC1311DWVR is a precision isolated amplifier from Texas Instruments designed for high-accuracy voltage sensing applications. It features a single channel with galvanic isolation rated at 5000 Vrms, ensuring robust signal integrity in noisy environments. The device operates within a supply voltage range of 4.5 V to 5.5 V and consumes 7.1 mA of operating current. Key electrical specifications include a 3dB bandwidth of 220 kHz, an input bias current of 15 nA, and an input offset voltage of 9.9 mV. It offers a gain error of 0.04% and a power supply rejection ratio (PSRR) of -65 dB. The component supports a shutdown function and delivers up to 13 mA output current per channel. It is housed in an SOIC-8 surface-mount package and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation with a 5000 Vrms rating for safe signal transmission between high-voltage and low-voltage domains.
• Delivers precision performance with low gain error and high power supply rejection for accurate voltage sensing.
• Includes a dedicated shutdown pin to reduce power consumption during idle periods.
• Supports wide industrial operating temperatures suitable for demanding environmental conditions.

Applications

• Precision voltage sensing in motor control systems
• Current sensing in grid-tied inverters
• Isolated feedback loops in switching power supplies
• High-voltage measurement equipment

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as the 'DWVR' designation indicates reel or cut tape availability rather than tube packaging. Ensure compliance with humidity sensitivity handling requirements during storage and assembly. Confirm that the selected variant matches the required isolation voltage and thermal specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when high accuracy and robust galvanic isolation are required for voltage monitoring. The 220 kHz bandwidth supports dynamic signals, while the low input bias current minimizes loading effects on the source. Consider the SOIC-8 package for space-constrained designs. Compare against other AMC13xx variants if different gain settings or bandwidth requirements are necessary for the specific circuit topology.

Part Context

The AMC1311DWVR belongs to the AMC1311 series of precision isolated amplifiers manufactured by Texas Instruments. This series utilizes capacitive isolation technology to provide high common-mode transient immunity. The device is part of a broader family of isolation solutions designed for industrial and energy applications where safety and accuracy are critical. It complements other isolated amplifiers like the AMC1301, offering specific trade-offs between bandwidth, offset voltage, and gain configuration.

Replacement Considerations

The AMC1311DWVRG4 is a verified equivalent variant within the same product line, differing primarily in manufacturing compliance markings. Other members of the AMC1311 family may serve as functional alternatives if pin compatibility and electrical parameters align with the design requirements.