MCS1805 Linear Hall-Effect Current Sensor SOIC

MCS1805 Linear Hall-Effect Current Sensor SOIC

The MCS1805 is a linear Hall-effect current sensor IC for AC or DC current sensing.

Key Specifications

Features

• 3.3V or 5V Single Supply Options
• Immune to External Gradient Magnetic Fields by Differential Sensing
• Extreme Low-Noise Density
• 3kVRMS Minimum Isolation Voltage
• 580VRMS Maximum Working Voltage
• ±2.5% Total Accuracy
• 5A to 50A Bidirectional or Unidirectional Range
• 120kHz Bandwidth
• Custom Over Current Detection (OCD) from 50% to 240% of IPMAX
• Fast OCD with 1µs Response Time

Typical Application Circuit

Applications

• Motor Control
• 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