ADUM3190ARQZ

Overview

The ADUM3190ARQZ is a high stability isolated error amplifier based on iCoupler technology. It features a 400 kHz bandwidth, 2.5 kV rms isolation voltage, and operates within a supply range of 3 V to 20 V on both sides. The device provides an integrated 1.225 V reference with 0.5% initial accuracy and ±1% total accuracy over the −40°C to +125°C temperature range. It includes a wideband operational amplifier with a 10 MHz gain-bandwidth product for loop compensation.

Feature Summary

• Provides stable isolated feedback for linear power supplies without lifetime degradation associated with optocouplers.
• Integrates a precision 1.225 V reference source for accurate output setpoint comparison.
• Supports Type II or Type III compensation networks via a wideband operational amplifier.
• Delivers fast transient response suitable for primary side controllers in dc-to-dc circuits.

Applications

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

Procurement Notes

Verify the specific suffix ARQZ against the manufacturer's ordering guide to confirm the A-grade accuracy specifications and QSOP-16 package variant. Ensure compatibility with automotive qualification requirements if applicable. Cross-reference safety approvals such as UL 1577 and IEC/EN/CSA 62368-1 with system design constraints before finalizing procurement.

Selection Notes

Select this component when replacing optocouplers to improve transient response and eliminate current transfer ratio drift. The 400 kHz bandwidth supports higher switching frequencies compared to traditional solutions. Verify that the 2.5 kV rms isolation rating meets the system's creepage and clearance requirements. Consider the EAOUT and EAOUT2 drive capabilities for direct PWM controller interfacing.

Part Context

The ADUM3190 series utilizes Analog Devices' iCoupler digital isolation technology to replace analog optocoupler and shunt regulator combinations. This integration reduces component count and improves reliability by removing light-emitting diode aging effects. The device is designed specifically for primary-side control applications where high stability and wide temperature operation are critical.

Replacement Considerations

Public confirmed substitute part numbers include ADUM3190BRQZ, ADUM3190SRQZ, and ADUM3190TRQZ. These variants share the same functional architecture but differ in accuracy grades and operating temperature ranges. Verify pinout compatibility and insulation ratings when substituting.