MCS1806 3kVRMS Isolated Hall-Effect Current Sensor SOIC

MCS1806 3kVRMS Isolated Hall-Effect Current Sensor SOIC

The MCS1806 is a linear Hall-effect current sensor for AC or DC current sensing.

Key Specifications

Features

• 3.3V or 5V Single-Supply Options
• Immune to External Magnetic Fields via Differential Sensing
• 3kVRMS Minimum Isolation Voltage
• 500VRMS Maximum Working Voltage
• ±2.5% Total Accuracy
• 0.9mΩ Internal Conductor Resistance
• ±5A to ±50A Bidirectional Range
• Adjustable Bandwidth Up to 100kHz
• Ratiometric Output from Supply Voltage
• Output Proportional to AC or DC Currents

Typical Application Circuit

Applications

• Multi-Phase Inverters
• Motor Controls
• Automotive Systems
• Load Detection and Management
• Switch-Mode Power Supplies

Design Notes

• Mechanical tolerance between the magnet and the sensing element translates directly into angle error; budget it before choosing the resolution.
• Match the output interface (SPI, ABZ, PWM or analog) to the MCU timing, including the latency the control loop can tolerate.
• Offset and sensitivity drift over temperature are systematic — a single-point calibration at room temperature will not hold over the operating range.
• Differential or digital outputs survive electrically noisy motor environments far better than single-ended analog ones.

Common Questions