ADUM3190L703F

Overview

The ADuM3190L703F is a high stability isolated error amplifier based on iCoupler technology. It features a 400 kHz bandwidth, 2.5 kV rms isolation voltage, and a 1.225 V reference. Operating on dual supplies from 3 V to 20 V, it delivers less than 7 mA total power consumption. The device provides 0.5% initial accuracy and 1% accuracy over the full temperature range of −40°C to +125°C.

Feature Summary

• Provides stable isolated feedback for linear power supply controllers without lifetime degradation associated with optocouplers.
• Integrates a wideband operational amplifier and a precision 1.225 V reference for accurate loop compensation.
• Supports Type II or Type III compensation networks to enhance transient response and system stability.

Applications

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

Procurement Notes

Verify the specific suffix L703F against official Analog Devices documentation to confirm exact grade, packaging, and automotive qualification status. Ensure compatibility with required insulation standards such as UL 1577 and IEC/EN/CSA 62368-1 for the target application environment.

Selection Notes

Select this component when replacing optocouplers in primary side control applications requiring improved transient response and long-term stability. Consider the 400 kHz bandwidth and 10 MHz op amp gain-bandwidth product for high-speed switching requirements. Verify that the 2.5 kV rms isolation rating meets the safety clearance and creepage distances of the design.

Part Context

The ADuM3190 utilizes Analog Devices' iCoupler digital isolation technology to replace traditional optocoupler and shunt regulator solutions. This approach eliminates current transfer ratio uncertainties and extends operating temperature limits beyond standard optocoupler capabilities, enabling higher power density designs.

Replacement Considerations

Direct substitutes include other ADuM3190 variants such as ADUM3190ARQZ or ADUM3190WSRQZ. Verify that alternative grades match the required bandwidth options and temperature ranges specified in the original design constraints.