FOD2711T

Overview

The FOD2711T is an optically isolated error amplifier manufactured by onsemi. It integrates a precision programmable shunt reference, specifically the AZ431L, with a high-speed phototransistor output in an 8-pin DIP package. This configuration provides galvanic isolation for feedback loops in switching power supplies and motor drives. The device offers a wide common-mode rejection ratio and operates over an extended temperature range of -40°C to 85°C, ensuring stable performance in industrial environments.

Feature Summary

• Integrates a precision programmable shunt reference with an optocoupler for compact error amplification
• Provides high-voltage electrical isolation between input control circuits and output power stages
• Features fast propagation delay suitable for high-frequency switching applications

Applications

• Switching mode power supply (SMPS) primary-side regulation
• Motor drive control loops
• Industrial power conversion systems

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the manufacturer marking matches onsemi branding to avoid counterfeit components. Ensure the 8-MDIP package dimensions align with the target PCB footprint. Check for RoHS compliance status if required by local regulations. Validate the date code against current production batches for quality assurance.

Selection Notes

Select this component when a combined reference and isolation solution is needed to reduce board space. It is suitable for designs requiring precise voltage monitoring without external error amplifier ICs. Consider the isolation voltage rating relative to the system's working voltage. Evaluate the thermal dissipation capabilities within the enclosed DIP package. Compare propagation delays against other optocouplers if timing sensitivity is critical.

Part Context

This part belongs to onsemi's family of optically isolated amplifiers. It replaces older discrete solutions that required separate shunt references and optocouplers. The integration simplifies design complexity in isolated feedback paths. It supports legacy designs transitioning to more integrated power management architectures.

Replacement Considerations

Check for direct pin-compatible alternatives from onsemi or other manufacturers offering similar integrated shunt reference optocouplers. Verify that substitute parts maintain the same isolation voltage and propagation delay specifications. Ensure the replacement package matches the existing 8-DIP footprint.