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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Resources
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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 | Order Code | Manufacturer / Description | Availability | Price For | Price | Quantity | Quiescent Current | Current Sense Direction | Bandwidth | Accuracy | Measured Current | Sensor Case Style | Sensor Case / Package | No. of Pins | Supply Voltage Min | Supply Voltage Max | Isolation Voltage | Sensor IC Mounting | Operating Temperature Min | Operating Temperature Max | Product Range | Qualification | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ACS712ELCTR-20A-T
|
1329624 |
Linear Current Sensor, Hall Effect, +/- 20A, SOIC-8 ALLEGRO MICROSYSTEMS
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6,857 in stock + Check Stock & Lead Times 6,857 in stock for next day delivery (UK stock) |
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Available until stock is exhausted
|
1+ Kč74.176 10+ Kč61.043 25+ Kč59.827 50+ Kč58.611 100+ Kč54.72 250+ Kč53.261 500+ Kč51.558 1000+ Kč50.099 More Pricing... |
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Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Min: 1
Mult:
1
|
10mA | Unidirectional, Bidirectional | 80kHz | 1.5% | 10mA | SOIC | SOIC | 8Pins | 4.5V | 5.5V | 2.1kVrms | Surface Mount | -40°C | 85°C | - | - | |
|
ACS712ELCTR-05B-T
|
1329623 |
Linear Current Sensor, Hall Effect, +/- 5A, SOIC-8 ALLEGRO MICROSYSTEMS
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7,001 in stock + Check Stock & Lead Times 7,001 in stock for next day delivery (UK stock)
More stock available week commencing 11/9/26 |
Each (Supplied on Cut Tape)
|
1+ Kč75.878 10+ Kč61.286 25+ Kč60.07 50+ Kč58.611 100+ Kč56.422 250+ Kč53.99 500+ Kč51.558 1000+ Kč50.342 More Pricing... |
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Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Min: 1
Mult:
1
|
10mA | Unidirectional, Bidirectional | 80kHz | 1.5% | 10mA | SOIC | SOIC | 8Pins | 4.5V | 5.5V | 2.1kVrms | Surface Mount | -40°C | 85°C | - | - | |
EMC1701-2-AIZL-TR
|
2361959 |
Current Sensor, High Side, MSOP, 10 Pins MICROCHIP
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Available to supplier Lead Time + Check lead timesLead time 36 days |
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Non-Cancellable / Non Returnable
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2500+ Kč20.453 |
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2500
|
950µA | - | - | - | 950µA | MSOP | MSOP | 10Pins | 3V | 24V | - | - | -40°C | 85°C | - | - | |
|
ACS711KLCTR-12AB-T
|
2057423 |
Current Sensor, Overcurrent Fault, Bidirectional, ± 5%, SOIC, 8 Pins ALLEGRO MICROSYSTEMS
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720 in stock + Check Stock & Lead Times 720 in stock for next day delivery (UK stock)
More stock available week commencing 11/9/26 |
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1+ Kč55.45 10+ Kč44.262 50+ Kč42.074 100+ Kč40.858 250+ Kč38.912 500+ Kč36.966 1000+ Kč35.994 2500+ Kč33.562 More Pricing... |
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|
4mA | Bidirectional | 100kHz | ± 5% | 4mA | SOIC | SOIC | 8Pins | 3V | 5.5V | - | Surface Mount | -40°C | 125°C | - | - | |
CSLW6B200M
|
2396419 |
Current Sensor, CSLW Series, Open Loop-200mA to 200mA, Sink, Source Output, 4.5 Vdc to 10.5 Vdc HONEYWELL
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No Longer Stocked |
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|
null | - | - | - | - | - | - | - | - | - | - | - | - | -25°C | 100°C | CSL Series | - | ||
ACS758LCB-050B-PFF-T
|
1791392 |
Current Sensor, Current Conductor, Bidirectional, - 1.2%, PFF, 5 Pins ALLEGRO MICROSYSTEMS
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2,145 in stock + Check Stock & Lead Times 2,145 in stock for next day delivery (UK stock)
More stock available week commencing 11/9/26 |
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1+ Kč187.994 10+ Kč163.187 25+ Kč151.757 50+ Kč146.893 100+ Kč143.731 250+ Kč140.813 More Pricing... |
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10mA | Bidirectional | 120kHz | - 1.2% | 10mA | PFF | PFF | 5Pins | 3V | 5.5V | 4.8kVrms | Through Hole | -40°C | 150°C | - | AEC-Q100 |