ADUM3190SRQZ-RL7

Overview

The ADUM3190SRQZ-RL7 is a high stability isolated error amplifier based on iCoupler technology, packaged in a 16-lead QSOP. It provides a 2.5 kV rms isolation voltage rating and operates within an ambient temperature range of -40°C to +125°C. The device features a 1.225 V reference voltage with 1% accuracy over the full temperature range and supports Type II or Type III compensation networks. Supply voltages for both sides range from 3 V to 20 V, with total power consumption under 7 mA. The bandwidth is specified at 400 kHz.

Feature Summary

• Provides stable isolated feedback for linear power supplies without lifetime drift associated with optocouplers.
• Integrates a wideband operational amplifier compatible with standard loop compensation techniques.
• Includes a high accuracy internal reference voltage source for precise output setpoint comparison.
• Qualified for automotive applications and compliant with multiple international safety regulations.

Applications

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

Procurement Notes

Verify that the specific suffix 'S' corresponds to the extended temperature grade (-40°C to +125°C) required for your application environment. Confirm package type matches the 16-lead QSOP footprint. Ensure supply rails remain within the 3 V to 20 V operating range. Check regulatory approvals against local safety standards before final integration.

Selection Notes

Select this component when replacing optocouplers to improve transient response and eliminate current transfer ratio variations. Use the EAOUT pin for controllers requiring lower drive voltages or the EAOUT2 pin for higher voltage interfaces up to 20 V. Consider the 400 kHz bandwidth for faster loop dynamics compared to traditional shunt regulators. Verify thermal derating requirements if case temperatures approach maximum limits.

Part Context

This part belongs to the ADuM3190 family of isolated error amplifiers manufactured by Analog Devices. It utilizes iCoupler technology to provide galvanic isolation without magnetic components like transformers or optical components like LEDs. The series includes variants with different temperature grades and bandwidth options to suit various power management architectures.

Replacement Considerations

Direct substitutes include other ADUM3190 variants such as the ADUM3190TRQZ for standard temperature ranges or the ADUM3190WTRQZ for wider supply voltage compatibility. Ensure replacement parts maintain the same 16-QSOP package dimensions and pinout configuration to fit existing PCB layouts.

FAQ

What is the difference between the EAOUT and EAOUT2 pins?

EAOUT delivers ±3 mA with a voltage range of 0.4 V to 2.7 V, suitable for low-voltage PWM controllers. EAOUT2 delivers ±1 mA but offers a higher voltage swing, guaranteeing up to 5.0 V when VDD1 is between 10 V and 20 V, making it compatible with controllers requiring higher input thresholds.

How does the ADUM3190 handle common-mode transients?

The device can withstand common-mode transients ranging from -100 kV/µs to +100 kV/µs across the insulation barrier. Exceeding these absolute maximum ratings may cause latch-up or permanent damage.