ADUM3190TRQZ

Overview

The ADUM3190TRQZ is a high stability isolated error amplifier based on Analog Devices iCoupler technology. It features a wideband operational amplifier and an integrated 1.225 V reference voltage source. The device provides galvanic isolation with a rated dielectric insulation voltage of 2500 V rms. Key electrical parameters include a gain bandwidth product of 10 MHz, a -3 dB bandwidth of 400 kHz for B and T grades, and an initial accuracy of 0.5%. It operates on supply voltages ranging from 3 V to 20 V on both sides.

Feature Summary

• Integrates a wideband operational amplifier and precision reference for linear feedback power supplies
• Provides stable transfer function over lifetime and temperature without optocoupler degradation
• Supports Type II or Type III compensation networks for loop stability
• Compatible with DOSA standards and primary side controllers

Applications

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

Procurement Notes

Verify the specific grade suffix (e.g., TRQZ) against the manufacturer's ordering guide to confirm performance characteristics such as bandwidth and operating temperature range. Ensure that the selected variant meets the required insulation ratings and regulatory approvals for the target application environment. Cross-reference datasheet revisions to confirm current specifications.

Selection Notes

Select the ADUM3190 variant based on the required output drive capability and bandwidth. The B and T grades offer higher bandwidth compared to A, S, and WS grades. Consider the EAOUT and EAOUT2 pin configurations when designing the interface with PWM controllers. Verify that the supply voltage range and thermal dissipation limits align with the system constraints.

Part Context

The ADUM3190 series replaces traditional optocoupler and shunt regulator solutions in isolated feedback loops. It utilizes magnetic coupling technology to transmit signals across the isolation barrier. This approach eliminates the current transfer ratio uncertainty associated with optocouplers, offering improved transient response and stability in power conversion applications.

Replacement Considerations

Direct replacements include other ADuM3190 variants with different suffixes indicating package or grade differences. Verify compatibility with existing PCB footprints and control loop compensation requirements when substituting.