AMC3302DWE

Overview

The AMC3302DWE is a high-precision, reinforced isolated amplifier from Texas Instruments designed for shunt-based current sensing. It features an integrated DC/DC converter enabling single-supply operation on the low side. The device provides a fixed gain of 41 V/V and supports a ±50-mV input voltage range. Key electrical specifications include a 340-kHz bandwidth, 95 kV/µs minimum common-mode transient immunity (CMTI), and a maximum input offset voltage of ±50 µV. It operates within a supply voltage range of 3 V to 5.5 V and functions across an extended industrial temperature range of –40°C to +125°C.

Feature Summary

• Integrated isolated DC/DC converter allows single-supply operation from the low-side, simplifying system design in space-constrained applications.
• Reinforced capacitive isolation barrier certified per DIN VDE V 0884-11 and UL1577 with a working voltage up to 1.2 kVRMS.
• Optimized for direct connection to low-impedance shunt resistors or low-level voltage sources with excellent DC accuracy.
• Includes diagnostic output pin and fault-detection features to simplify system-level design and monitoring.

Applications

• Isolated current sensing in protection relays
• Current sensing in motor drives
• Isolated current measurement in power supplies
• Current sensing in photovoltaic inverters

Procurement Notes

Verify that the specific orderable part number matches the required package variant and temperature grade. Confirm compliance with safety certifications such as VDE V 0884-11 and UL1577 if used in safety-critical systems. Ensure external decoupling components meet the recommended ESR specifications for stable DC/DC converter operation. Check for any documentation updates regarding pin function changes or layout guidelines before finalizing the design.

Selection Notes

Select this component when high precision is required for shunt-based current measurements in isolated environments. The integrated DC/DC converter eliminates the need for separate isolated power supplies on the high side. Consider the fixed gain of 41 V/V and ±50-mV input range to ensure compatibility with the target shunt resistor value. Verify that the 1.2 kVRMS working voltage meets the system's isolation requirements.

Part Context

The AMC3302 belongs to the AMC330x family of precision isolated amplifiers from Texas Instruments. This series utilizes reinforced capacitive isolation technology to separate high-voltage and low-voltage circuit domains. The DWE suffix indicates the device is housed in a 16-pin Small Outline Integrated Circuit (SOIC) package with a nominal body size of 10.30 mm by 7.50 mm.

Replacement Considerations

AMC3302DWR