The ACPL-C87AT is a high-performance isolated voltage sensor designed by Avago Technologies. It's primarily used for voltage sensing in electronic power conversion applications, enabling precise monitoring and control of voltage levels while providing galvanic isolation. This isolation protects sensitive control circuitry from high voltages, enhancing safety and system reliability.

Applications

• Voltage Sensing in Inverters: Used to monitor DC-link voltage in solar inverters, wind turbine inverters, and motor drives.
• Power Supply Monitoring: Implemented in power supplies for over-voltage and under-voltage detection and protection.
• Battery Management Systems (BMS): Used to monitor individual cell voltages in battery packs for electric vehicles and energy storage systems.
• Isolated Analog Signal Transmission: Provides isolated transmission of analog voltage signals in industrial automation systems.
• Renewable Energy Systems: Integrated into renewable energy systems for accurate voltage measurement and control.

Features

• Isolated Voltage Sensing: Provides galvanic isolation between the high-voltage circuit and the low-voltage control circuit.
• High Accuracy: Offers high accuracy and linearity in voltage measurement.
• Wide Input Voltage Range: Accommodates a wide range of input voltage levels.
• Low Offset Drift: Minimizes offset drift over temperature, ensuring stable performance.
• Compact Package: Available in a small surface-mount package for space-saving designs.
• Sigma-Delta Modulation: Uses sigma-delta modulation for high-resolution analog-to-digital conversion.
• RoHS Compliant: Compliant with RoHS environmental standards.

Benefits

• Enhanced Safety: Galvanic isolation protects control circuitry from high voltages, enhancing safety for users and equipment.
• Improved Accuracy: High accuracy and linearity enable precise voltage monitoring and control.
• Increased System Reliability: Isolation prevents ground loops and reduces the risk of damage to sensitive components.
• Simplified Design: Compact package simplifies PCB layout and reduces component count.
• Precise Voltage Monitoring: Enables accurate voltage monitoring for optimal system performance.
• Noise Immunity: Resistant to noise and interference, ensuring reliable operation in harsh environments.

Additional Details

The ACPL-C87AT operates by converting the input voltage into a digital signal using sigma-delta modulation. This digital signal is then transmitted across the isolation barrier using an optical coupling technique. The isolated digital signal is then converted back into an analog voltage signal on the output side. The device is designed to operate over a wide temperature range and is suitable for use in harsh industrial environments. It is available in industry-standard surface mount packages for easy assembly.