Hall Effect Linear Current Sensor for < 200V Isolation Application, 3.3V Supply
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.
- 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)
- 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)1.2