The ACPL-W481 is a dual-channel, high-CMR insulation amplifier designed for accurate current and voltage sensing in electronic power converters. It features excellent linearity and temperature stability, making it suitable for demanding applications where precise measurements are critical. This isolation amplifier provides galvanic isolation between the input and output sides, protecting sensitive control circuitry from high-voltage potentials. Avago Technologies (now Broadcom) designs these amplifiers for use in harsh environments.

Applications:

• Motor drives: Precisely measures motor current for accurate torque control.
• Inverters: Senses voltage and current in solar inverters and UPS systems for feedback control.
• Power supplies: Provides isolated current and voltage sensing for power supply regulation.
• Electric vehicle chargers: Measures current and voltage for accurate charging control and safety.
• Welding equipment: Provides feedback for current regulation in welding applications.

Features:

• High common-mode rejection (CMR): Minimizes the impact of noise on the measured signal.
• Excellent linearity: Ensures accurate measurements across the entire input range.
• High isolation voltage: Provides robust galvanic isolation between the input and output.
• Dual-channel configuration: Allows for simultaneous measurement of two signals.
• Wide operating temperature range: Suitable for use in harsh industrial environments.
• Compact package: Saves board space in densely populated circuits.

Benefits:

• Improved control accuracy: Precise current and voltage sensing enables more accurate control of power electronic systems.
• Enhanced safety: Galvanic isolation protects control circuitry from high-voltage hazards.
• Increased system reliability: Robust design ensures reliable operation in demanding environments.
• Reduced design complexity: Integrated features simplify circuit design.

Additional Details:

The ACPL-W481 typically operates with a supply voltage of 5V. The input voltage range is usually specified to accommodate typical shunt resistor voltages. The gain and offset are precisely trimmed during manufacturing to ensure high accuracy. The isolation voltage is typically rated at several kilovolts. The datasheet provides detailed information on the amplifier's performance characteristics, including linearity, temperature drift, and bandwidth. It is designed for signals with frequencies in the tens to hundreds of kHz, but the exact bandwidth should be verified with the datasheet.