ADUM4190ARIZ

Overview

The ADuM4190ARIZ is a high stability isolated error amplifier utilizing iCoupler technology. 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 +85°C. The device provides a precision 1.225 V reference with 1% accuracy over the full temperature range. Key electrical parameters include a gain bandwidth product of 10 MHz, a 3 dB bandwidth of 200 kHz, and an input offset voltage of 2.5 mV. It offers reinforced isolation rated at 5 kV rms.

Feature Summary

• Stable transfer function that does not change over lifetime or temperature, unlike optocoupler solutions.
• Integrated wideband operational amplifier suitable for Type II or Type III compensation networks.
• Includes a high accuracy 1.225 V internal reference voltage for precise output setpoint comparison.
• Provides two isolated outputs (EAOUT and EAOUT2) to drive various PWM controller requirements.

Applications

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

Procurement Notes

Verify the specific grade suffix (e.g., A, B, S, T) against the required operating temperature range and bandwidth specifications before ordering. Confirm that the SOIC-16 package dimensions align with the PCB footprint design. Ensure compliance with relevant safety standards such as UL 1577 and IEC/EN 60950-1 for the intended application environment.

Selection Notes

Select this component when replacing optocouplers to improve transient response and stability in isolated DC-to-DC converters. Consider the EAOUT pin for standard drive requirements or EAOUT2 if higher voltage swing is needed for PWM controllers. Verify that the 5 kV rms isolation rating meets the system's safety clearance and creepage requirements.

Part Context

This part belongs to the ADuM4190 series of isolated error amplifiers from Analog Devices. It is designed to replace traditional optocoupler and shunt regulator combinations in primary side control applications. The device leverages iCoupler technology to provide galvanic isolation without the degradation issues associated with LED-based optical components.

Replacement Considerations

Direct replacement requires verifying pin compatibility with existing optocoupler circuits. Note that the ADuM4190 integrates an op amp and reference, necessitating adjustments to external compensation networks compared to simple digital isolators or passive optocouplers.