Current Sensors

A current sensor is a device that detects and converts current to an easily measurable output voltage, which is proportional to the current through the measured path. There are a wide variety of sensors, and each sensor is suitable for a specific current range and environmental condition. Among these sensors, a current sensing resistor is the most commonly used. It can be considered a current-to-voltage converter, where inserting a resistor into the current path, the current is converted to voltage in a linear way. The technology used by the current sensor is important because different sensors can have different characteristics for a variety of applications.


Current sensors are based on either open or closed loop hall effect technology. A closed-loop sensor has a coil that is actively driven to produce a magnetic field that opposes the field produced by the current being sensed. The hall sensor is used as a null-detecting device, and the output signal is proportional to the current being driven into the coil, which is proportional to the current being measured.


In an open loop current sensor, the magnetic flux created by the primary current is concentrated in a magnetic circuit and measured using a hall device. The output from the hall device is the signal conditioned to provide an exact (instantaneous) representation of the primary current.


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Videos

AMR Position and Current Sensing in Motor Control Applications

Circular Vertical Hall Sensor IC Technology Overview

ACS780 & ACS781 High Current Density Fully Integrated Current Sensor Ics

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  Manufacturer Part No Newark Part No. Manufacturer / Description
Availability Price for:
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Sensor Output Type Product Range
CSLW6B200M
CSLW6B200M - Current Sensor, CSLW Series, Open Loop-200mA to 200mA, Sink, Source Output, 4.5 Vdc to 10.5 Vdc

62M4099

Current Sensor, CSLW Series, Open Loop-200mA to 200mA, Sink, Source Output, 4.5 Vdc to 10.5 Vdc

HONEYWELL

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ACS712ELCTR-05B-T
ACS712ELCTR-05B-T - Current Sensor, Hall Effect, 8 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V

27M3644

Current Sensor, Hall Effect, 8 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V

ALLEGRO MICROSYSTEMS

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ACS712ELCTR-20A-T
ACS712ELCTR-20A-T - Current Sensor, 10 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V

31M3133

Current Sensor, 10 mA, 80 kHz, SOIC, 8 Pins, 4.5 V, 5.5 V

ALLEGRO MICROSYSTEMS

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ACS758LCB-100B-PFF-T
ACS758LCB-100B-PFF-T - Current Sensor, Linear, 10 mA, PFF, 5 Pins

04R7132

Current Sensor, Linear, 10 mA, PFF, 5 Pins

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ACS711KLCTR-12AB-T
ACS711KLCTR-12AB-T - Current Sensor, Overcurrent Fault, 4 mA, 100 kHz, -40 C, 125 C, 3 V, 5.5 V RoHS Compliant: Yes

71T9736

Current Sensor, Overcurrent Fault, 4 mA, 100 kHz, -40 C, 125 C, 3 V, 5.5 V RoHS Compliant: Yes

ALLEGRO MICROSYSTEMS

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2,984 in stock + Check Stock & Lead Times

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