ADUM4190BRIZ-RL

Overview

The ADUM4190BRIZ-RL is a high stability isolated error amplifier from Analog Devices, utilizing iCoupler technology for galvanic isolation. It features a 5 kV rms reinforced insulation rating and operates within a supply voltage range of 3 V to 20 V on both sides. The device includes an internal precision 1.225 V reference and offers initial accuracy of 0.5% with total error of 1% over the full temperature range. Key electrical parameters include a gain bandwidth product of 10 MHz, a -3 dB bandwidth of 400 kHz, and input bias current of 10 nA. It provides two output options: EAOUT with ±3 mA drive capability and EAOUT2 with ±1 mA drive.

Feature Summary

• Provides stable transfer function unaffected by lifetime degradation or high temperatures compared to optocouplers.
• Integrates a wideband operational amplifier suitable for Type II or Type III compensation networks.
• Includes a high accuracy 1.225 V reference voltage for precise output setpoint comparison.
• Offers dual isolated outputs (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 component authenticity through authorized Analog Devices distributors or direct channels. Confirm the specific suffix indicates reel packaging. Check for moisture sensitivity handling requirements during storage and assembly. Ensure compliance with relevant safety certifications such as UL 1577 and IEC standards for the intended application environment.

Selection Notes

Select this component when replacing optocouplers to improve transient response and stability in isolated feedback loops. Consider the 400 kHz bandwidth for applications requiring faster loop reaction than typical shunt regulators. Evaluate the need for the higher voltage swing available at the EAOUT2 pin if driving PWM controllers requires inputs above 2.4 V.

Part Context

This part belongs to the ADuM4190 series of isolated error amplifiers. It is designed to replace traditional optocoupler and shunt regulator combinations in primary side control applications. The device leverages digital isolator transformer technology to provide reliable signal transmission across the isolation barrier without the variability associated with LED-based components.

Replacement Considerations

Direct substitutes include other parts within the ADuM4190 family, such as the ADUM4190SRIZ-RL which offers a 200 kHz bandwidth option. Verify that any replacement maintains the required 5 kV rms isolation rating and fits the SOIC-16 package footprint.