BROADCOM Isolation Amplifier, Optical, 300µV, 4.5 to 5.5V, DIP-8

The BROADCOM Isolation Amplifier is a precision component engineered for reliable current and voltage sensing within electronic motor drives and other demanding applications. Its core function is to provide galvanic isolation, protecting sensitive circuitry from high-voltage transients and severe electrical noise, while accurately transmitting analogue signals.

Utilising advanced Sigma-Delta (Σ-∆) analogue-to-digital converter technology and a fully differential circuit topology, this amplifier delivers exceptional accuracy, stability, and linearity. It is an ideal solution for general analogue signal isolation where high performance under challenging conditions is required.

Key Features & Specifications

• High Isolation: Features an impressive isolation voltage of 3.75kVrms for one minute, certified to UL 1577, CSA, and IEC/EN/DIN EN 60747-5-5 safety standards.
• Superior Noise Rejection: Offers excellent common-mode transient immunity of 15kV/µs at 1000V, ensuring stable operation in noisy environments like motor drives and switched-mode power supplies.
• Exceptional Accuracy: Boasts a very low input offset voltage of 300µV and minimal gain drift versus temperature (0.00025 V/V/°C), providing highly precise signal measurement.
• High Linearity: Maintains signal integrity with a maximum non-linearity of just 0.004%.
• Practical Design: Housed in a compact, auto-insertable 8-pin DIP (Dual In-line Package) that is suitable for surface mount assembly, facilitating efficient PCB integration.

Typical Applications

This isolation amplifier is perfectly suited for a wide range of industrial and power electronics scenarios, including:

• Motor phase and rail current sensing in variable frequency drives.
• Inverter current sensing.
• Signal isolation within switched-mode power supplies (SMPS).
• General-purpose current sensing,