ADUM3190TRQZ-RL7

Overview

The ADUM3190TRQZ-RL7 is a high stability isolated error amplifier utilizing Analog Devices iCoupler technology. It features a 400 kHz bandwidth, 2.5 kVrms isolation voltage, and operates on dual supplies from 3 V to 20 V. The device includes a precision 1.225 V reference and offers 0.5% initial accuracy with 1% total accuracy across the -40°C to +125°C temperature range. Packaged in a 16-lead QSOP, it supports Type II or III compensation networks for linear feedback power supplies.

Feature Summary

• Replaces optocouplers by providing stable transfer functions unaffected by lifetime degradation or high temperatures.
• Integrates a wideband operational amplifier enabling fast transient response and overcurrent condition handling.
• Includes an internal high-accuracy 1.225 V reference for precise supply output setpoint comparison.

Applications

• Linear power supplies
• Inverters
• Uninterruptible Power Supply (UPS)
• DOSA-compatible modules

Procurement Notes

Verify the specific grade suffix (e.g., A, B, S, T) against the datasheet ordering guide to confirm operating temperature range and bandwidth specifications. Ensure the reel packaging matches the RL7 designation. Confirm that the component meets the required automotive qualification standards if applicable to the target system design.

Selection Notes

Select this component when primary side control requires superior transient response compared to traditional optocoupler solutions. The integrated 1.225 V reference simplifies loop compensation design. Verify that the 400 kHz bandwidth aligns with the switching frequency of the target PWM controller to ensure adequate phase margin and system stability.

Part Context

This part belongs to the ADuM3190 family of isolated error amplifiers designed for high-performance power conversion. It leverages digital isolation technology to eliminate the current transfer ratio uncertainties associated with analog optocouplers. The family provides a compact solution for maintaining stability in isolated feedback applications across wide temperature ranges.

Replacement Considerations

Direct replacements include other ADUM3190 variants such as ADUM3190ARQZ or ADUM3190BRQZ, depending on the required temperature grade and gain specifications. Ensure the substitute maintains the 16-QSOP package and 2.5 kVrms isolation rating.