MCS1801 Linear Hall-Effect Current Sensor SOIC

MCS1801 Linear Hall-Effect Current Sensor SOIC

The MCS1801 is a linear Hall-effect current sensor for AC or DC current sensing.

Key Specifications

Features

• 5V Single Supply
• Immune to External Magnetic Fields by Differential Sensing
• 200VRMS Working Voltage for Basic Isolation
• -40°C to +125°C Operating Temperature
• 1.2mΩ Internal Conductor Resistance
• ±12.5A and ±25A Range
• Adjustable Bandwidth Up to 100kHz
• 4μs Output Rising Time
• Ratiometric Output from Supply Voltage
• Output Proportional to AC or DC Currents

Typical Application Circuit

Applications

• 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