HCPL-2731-000E – AVAGO

Overview

The Broadcom HCPL-2731-000E is a high-performance, dual-channel optocoupler designed for robust signal isolation in demanding electronic systems. Its core strength lies in the Darlington output configuration, which provides a significant current gain (up to 2600% CTR), enabling it to drive higher loads directly from low-current logic signals. A critical design consideration when utilizing this device is managing the Vce(sat) of 100mV, which, while low, can introduce a small voltage drop that needs to be accounted for in precision analog signal paths or when interfacing with very low-voltage digital rails. This characteristic ensures reliable signal transmission across 3750Vrms isolation barriers.

Key Features

• Isolation Voltage: 3750Vrms
• Current Transfer Ratio (CTR): 500% – 2600% @ 1.6mA
• Output Type: Darlington
• Output Current per Channel: 60mA
• Forward Voltage (Vf): 1.4V (Typ)
• Package: 8-DIP (0.300″, 7.62mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• High-speed digital signal isolation in industrial control systems
• Driving power transistors or relays from microcontroller GPIOs
• Interfacing between noisy power supply rails and sensitive logic
• Ground loop elimination in mixed-signal instrumentation