AMC3301QDWERQ1

Overview

The AMC3301QDWERQ1 is a precision, reinforced isolated amplifier optimized for shunt-based current measurements in automotive applications. It features an integrated DC/DC converter enabling single-supply operation from the low-side. The device supports a 3.3-V or 5-V supply with a fixed gain of 8.2 V/V and a ±250-mV input voltage range. Key electrical parameters include a maximum offset voltage of ±150 µV, a common-mode transient immunity (CMTI) of 85 kV/µs, and an output bandwidth of 290 kHz. It operates within a temperature range of –40°C to +125°C and provides safety certifications including 6000-V PK reinforced isolation per DIN VDE V 0884-11.

Feature Summary

• Integrated isolated DC/DC converter allows single-supply operation from the low-side.
• Reinforced capacitive isolation barrier certified according to VDE V 0884-11 and UL1577.
• System-level diagnostic features simplify design and fault detection.
• Meets CISPR-11 and CISPR-25 EMI standards.

Applications

• Isolated shunt-based current sensing in HEV/EV charging piles
• HEV/EV on-board chargers (OBC)
• HEV/EV DC/DC converters
• HEV/EV traction inverters

Procurement Notes

Verify the specific ordering suffix matches the required package and tape/reel configuration. Confirm that the component meets AEC-Q100 Grade 1 qualification requirements for the intended automotive environment. Ensure the design adheres to the recommended operating conditions regarding supply voltage and common-mode input voltage limits to maintain specified performance and safety ratings.

Selection Notes

Select this component when space-constrained designs require a fully integrated isolated solution without external magnetics. It is suitable for applications demanding high accuracy with low DC errors and drift over a wide temperature range. Consider the fixed gain and input range when designing the shunt resistor network. Verify that the system can accommodate the analog output format and diagnostic pin requirements.

Part Context

This part belongs to the AMC3301-Q1 series of precision isolated amplifiers. It is designed specifically for automotive environments requiring reinforced isolation. The device integrates both the signal path and power conversion across the isolation barrier, distinguishing it from discrete solutions or those requiring external isolated power supplies.

Replacement Considerations

Direct replacements within the same family include parts with different gains or input ranges, such as the AMC3301S. Verify compatibility regarding gain settings, input voltage ranges, and isolation specifications before substitution.

FAQ

What is the purpose of the DIAG pin?

The DIAG pin is an active-low, open-drain status indicator output used for system-level diagnostics. It signals faults related to the isolated DC/DC converter or high-side LDO undervoltage conditions.

How does the integrated DC/DC converter affect power supply requirements?

The integrated DC/DC converter allows the device to operate from a single low-side supply (3.3 V or 5 V). It generates the necessary high-side power for the isolation barrier, eliminating the need for an external isolated power supply.