ADUM4190TRIZ

Overview

The ADUM4190TRIZ is a high-stability isolated error amplifier based on iCoupler technology, designed for linear feedback power supplies. It features a wide voltage supply range of 3 V to 20 V on both sides and operates within an ambient temperature range of -40°C to +125°C. The device provides a 400 kHz bandwidth and maintains 0.5% initial accuracy with 1% total accuracy over the full temperature range. It includes a 1.225 V reference and offers reinforced isolation rated at 5 kV rms.

Feature Summary

• Eliminates optocoupler limitations by providing stable transfer functions unaffected by lifetime degradation or temperature variations.
• Integrates a wideband operational amplifier and precision reference for simplified loop compensation in primary side control.
• Supports Type II or Type III compensation networks to enhance transient response and stability.
• Delivers dual output options (EAOUT and EAOUT2) to accommodate various PWM controller input requirements.

Applications

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

Procurement Notes

Verify that the TRIZ suffix corresponds to the tape and reel packaging option rather than tube packaging when sourcing components. Confirm the specific grade (A, B, S, or T) required for the target operating temperature and bandwidth specifications. Ensure compatibility with the 16-lead SOIC footprint during PCB layout planning.

Selection Notes

Select this component for applications requiring superior stability compared to optocoupler-based solutions. Consider the 400 kHz bandwidth for faster transient response needs. Evaluate the 5 kV rms isolation rating against system safety requirements. Verify that the 1.225 V internal reference aligns with the desired output voltage setpoint calculations.

Part Context

This part belongs to the ADuM4190 family of isolated error amplifiers manufactured by Analog Devices. It utilizes iCoupler technology to replace traditional optocouplers and shunt regulators. The series is designed to improve power density and stability in isolated DC-to-DC converter designs.

Replacement Considerations

Direct substitutes include other ADuM4190 variants such as ADUM4190ARIZ or ADUM4190BRIZ, depending on the required temperature range and bandwidth grade. Cross-referencing pinouts and isolation ratings is essential when considering non-Analog Devices alternatives.