Hall Effect Linear Current Sensor for < 200V Isolation Application, 3.3V Supply

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Product Description

The MCS1800 is a cost effective Hall effect-based linear current sensor IC for AC or DC current sensing in lower voltage applications <200V. The low resistance conductive path minimizes power loss in applications requiring high efficiency.

The Hall array is differential to cancel out any stray magnetic field.

A low resistance primary conductor allows current flow within close proximity of an integrated circuit containing high accuracy Hall sensors. This current generates a magnetic field which is sensed at two different points by the integrated Hall transducers. The magnetic field difference between these two points is then converted into a voltage proportional to the applied current. Spinning current technique is used for a low stable offset.

 The galvanic isolation between the pins of the primary conductive path and the sensor leads allows the MCS1800 to replace opto-isolators or other expensive isolation devices.

The MCS1800 requires a minimum number of readily available, standard external components. It is available in a SOIC-8 package. The small footprint saves board area and is ideal for space-constrained applications.

Product Features

  • 3.3V single supply
  • Immune to external magnetic fields by differential sensing
  • 200 VRMS minimum isolation voltage from pins 1-4 to pins 5-8
  • Operating temperature -40°C to 125°C
  • 0.8mΩ internal conductor resistance
  • 12.5 to 25A range (see ordering information)
  • Adjustable bandwidth, 300Hz to 200kHz3.5μs minimum output rise time
  • Ratiometric output from supply voltage
  • Output proportional to AC or DC currents
  • Factory-trimmed for accuracy
  • No magnetic hysteresis
  • Integrated shield suppressing capacitive coupling from current conductor to die (up to 10V/ns)
  • SOIC-8


  • Typebidirectional
  • VCC (typ) (V)3.3
  • Current Range (A)±12.5, ±25
  • Accuracy (±%)5%
  • Temp Range (°C)-40°C to 125°C
  • Bandwidth (kHz)100
  • Isolation Voltage (V)200
  • Primary Conductor Resistance (mΩ)0.9
  • PackageSOIC-8
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.