ADUM3190WSRQZ

Overview

The ADUM3190WSRQZ is a high stability isolated error amplifier based on iCoupler technology, packaged in a 16-lead QSOP. It provides galvanic isolation with a rated voltage of 2.5 kV rms and supports supply voltages from 3 V to 20 V on both sides. The device features a 400 kHz bandwidth, a 10 MHz gain-bandwidth product op amp, and an internal 1.225 V reference. It offers 0.5% initial accuracy and 1% total error over the full temperature range of -40°C to +125°C.

Feature Summary

• Provides stable isolated feedback for power supplies without lifetime drift associated with optocouplers
• Integrates a wideband operational amplifier compatible with Type II or Type III compensation networks
• Includes a precision 1.225 V reference voltage for accurate output setpoint comparison
• Delivers dual isolated outputs (EAOUT and EAOUT2) to drive various PWM controller requirements

Applications

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

Procurement Notes

Verify that the specific suffix WSRQZ corresponds to the WS grade with 400 kHz bandwidth and automotive qualification as documented in the official Analog Devices ordering guide. Confirm package type is 16-lead QSOP and check for moisture sensitivity labeling. Ensure regulatory approvals such as UL 1577 and IEC/EN/CSA 62368-1 are required for the target application safety standards.

Selection Notes

Select this component when high loop bandwidth is required for fast transient response compared to traditional optocoupler solutions. The WS grade specifically provides a 400 kHz bandwidth suitable for higher switching frequency converters. Consider the EAOUT2 pin if the downstream PWM controller requires a minimum input voltage of 5 V, which this output guarantees at higher supply voltages.

Part Context

The ADUM3190 series utilizes Analog Devices' iCoupler technology to replace optocouplers and shunt regulators. This family eliminates the current transfer ratio uncertainty and temperature instability inherent in optical devices. The ADUM3190WSRQZ represents the automotive-grade variant within the broader ADUM3190 lineup, designed for robust performance in demanding environments.

Replacement Considerations

Direct replacements include other ADUM3190 variants such as ADUM3190WTRQZ or ADUM3190BSRQZ, depending on the required bandwidth grade (400 kHz vs 200 kHz) and operating temperature range.