MCQ1823 Ultra-Small Package Linear Hall-Effect Current Sensor QFN-12

MCQ1823 Ultra-Small Package Linear Hall-Effect Current Sensor QFN-12

The MCQ1823 is an automotive-grade, linear Hall-effect current sensor IC for AC or DC current sensing.

Key Specifications

Features

• Available in AEC-Q100 Grade 1
• 3.3V or 5V Single Supply Options
• Immune to All External Gradient Magnetic Fields by Differential Sensing
• 0.6mΩ Internal Conductor Resistance
• ±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
• Output Voltage (VOUT) Proportional to AC or DC Currents

Typical Application Circuit

Applications

• Motor Control
• Audio Driver Current 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