ADUM3190SRQZ

Overview

The ADUM3190SRQZ is a high stability isolated error amplifier based on iCoupler technology. It features a wideband operational amplifier with a gain bandwidth product of 10 MHz and an output bandwidth of 200 kHz. The device provides galvanic isolation rated at 2.5 kVrms. It includes a precision 1.225 V reference voltage source. Supply voltages for both sides range from 3 V to 20 V. Total power supply current is less than 7 mA. Initial accuracy is 0.5%, with total error of 1% over the temperature range.

Feature Summary

• Provides stable isolated feedback for linear power supplies, replacing optocouplers with consistent transfer functions.
• Integrates a wideband operational amplifier suitable for Type II or Type III compensation networks.
• Includes a high-accuracy internal reference voltage for precise output setpoint comparison.
• Supports fast transient response and overcurrent condition handling in control loops.

Applications

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

Procurement Notes

Verify the specific grade suffix 'S' corresponds to the required operating temperature range of -40°C to +125°C. Confirm package type is 16-lead QSOP. Check regulatory approvals such as UL 1577 and IEC/EN/CSA 62368-1 against system safety requirements. Ensure ESD precautions are implemented during handling due to device sensitivity.

Selection Notes

Select this component when primary side control is needed for improved transient response and power density. Compare bandwidth and accuracy specifications against optocoupler alternatives. Verify that the 2.5 kVrms isolation rating meets the application's safety clearance needs. Consider the 16-lead QSOP package size for PCB layout constraints.

Part Context

The ADuM3190 series utilizes Analog Devices' iCoupler magnetic isolation technology. This approach eliminates the lifetime drift and temperature sensitivity associated with traditional optocouplers. The device integrates the error amplifier, reference, and isolator into a single chip, simplifying design and enhancing reliability in isolated feedback applications.

Replacement Considerations

Public confirmed substitute part numbers: ADUM3190ARQZ, ADUM3190BRQZ, ADUM3190TRQZ.