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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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 (Incl JCT) | 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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1+ ¥461.84 (¥508.02) 10+ ¥415.30 (¥456.83) 25+ ¥407.25 (¥447.98) 50+ ¥399.19 (¥439.11) 100+ ¥372.34 (¥409.57) 250+ ¥365.76 (¥402.34) More Pricing... |
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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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More stock available week commencing 10/19/26 |
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1+ ¥463.63 (¥509.99) 10+ ¥417.09 (¥458.80) 25+ ¥408.14 (¥448.95) 50+ ¥399.19 (¥439.11) 100+ ¥384.87 (¥423.36) 250+ ¥379.25 (¥417.18) More Pricing... |
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10mA | Unidirectional, Bidirectional | 80kHz | 1.5% | 10mA | SOIC | SOIC | 8Pins | 4.5V | 5.5V | 2.1kVrms | Surface Mount | -40°C | 85°C | - | - | |
|
ACS711KLCTR-12AB-T
|
2057423 |
Current Sensor, Overcurrent Fault, Bidirectional, ± 5%, SOIC, 8 Pins ALLEGRO MICROSYSTEMS
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1+ ¥296.55 (¥326.21) 10+ ¥266.90 (¥293.59) 50+ ¥255.37 (¥280.91) 100+ ¥245.49 (¥270.04) 250+ ¥241.92 (¥266.11) |
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4mA | Bidirectional | 100kHz | ± 5% | 4mA | SOIC | SOIC | 8Pins | 3V | 5.5V | - | Surface Mount | -40°C | 125°C | - | - | |
ACS758LCB-050B-PFF-T
|
1791392 |
Current Sensor, Current Conductor, Bidirectional, - 1.2%, PFF, 5 Pins ALLEGRO MICROSYSTEMS
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1+ ¥1,162.27 (¥1,278.50) |
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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 |