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Replace the Shunt

Discover Allegro’s magnetic current sensors to make your design challenges easier

Technology advancements and the evolution of magnetic current sensors over the last two decades have made them a compelling alternative to traditional shunt-based current sensing circuits. With greater efficiency and isolation, higher bandwidths, smaller size and improved overall performance, engineers and designers can quickly and easily integrate these sensors into their electronic systems.

Packaging Innovation: Designers and engineers face the ongoing challenge of creating electronic systems that are both compact and energy-efficient. Allegro's innovative packages, featuring integrated shunt-less sensor solutions, directly address this challenge. By eliminating the need for external shunt resistors and other discrete components, designers and engineers can achieve significant reductions in both component count and overall circuit size while improving efficiency.

  • Compact design: The integrated magnetic current sensors are significantly smaller, saving valuable board space and reducing the number of components on the bill of materials.
  • Lower heat dissipation: The lower conductor resistance of integrated magnetic current sensors’ lead frames result in cooler system temperatures.
  • Simplified design process: By integrating the functionality of a traditional shunt resistor circuit into a single package, Allegro’s technology simplifies component placement and streamlines the design process.

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Video: ACS37220 Product Overview

The ACS37220 is a magnetic current sensor designed to replace high-power sense resistors in high-current monitoring applications requiring an isolation voltage below 100V. Compared to shunts, this device provides a smaller footprint, higher efficiency and simpler integration.

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Article: Overcoming Size Challenges in PCB Design with Magnetic Current Sensors

Magnetic current sensors provide a compact and efficient alternative to traditional current measurement techniques that significantly reduce the size of components on PCBs, crucial for space-constrained electronic designs.

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Article: Next-Generation Current Measurement: Addressing PCB Design Challenges with Magnetic Current Sensors

Introducing the Next-Generation Current Measurement Series: Advanced magnetic current sensors accurately detect magnetic fields generated by current flow, offering precise current level measurements.

  • ACS37220
  • ACS711
  • ACS71240
  • Eval Board

The ACS37220 is a high-power-density 200A, 150kHz magnetic current sensor for applications requiring an isolation voltage below 100V.

The ACS711 is a Hall-effect linear current sensor with overcurrent fault output for <100 V isolation.

The ACS71240 is a current sensor IC with common-Mode field rejection and overcurrent detection.

ACS37220

ImageManufacturer Part NumberDescriptionFor MeasuringSensor TypeCurrent - SensingAvailable QuantityView Details
CURRENT SENSOR HE 100A 7-QFNACS37220LEZATR-100B3CURRENT SENSOR HE 100A 7-QFNDCHall Effect100A3262 - ImmediateView Details
CURRENT SENSOR HE 100A 7-QFNACS37220LEZATR-100B5CURRENT SENSOR HE 100A 7-QFNDCHall Effect100A4708 - ImmediateView Details
CURRENT SENSOR HE 100A 7-QFNACS37220LEZATR-150B3CURRENT SENSOR HE 100A 7-QFNDCHall Effect100A4194 - ImmediateView Details
CURRENT SENSOR HE 150A 7-QFNACS37220LEZATR-150B5CURRENT SENSOR HE 150A 7-QFNDCHall Effect150A5855 - ImmediateView Details
CURRENT SENSOR HE 200A 7-QFNACS37220LEZATR-200B5CURRENT SENSOR HE 200A 7-QFNDCHall Effect200A4037 - ImmediateView Details

ACS711

ImageManufacturer Part NumberDescriptionFor MeasuringSensor TypeCurrent - SensingAvailable QuantityView Details
CURRENT SEN HE/OL 12.5A 8-SOICACS711ELCTR-12AB-TCURRENT SEN HE/OL 12.5A 8-SOICAC/DCHall Effect, Open Loop12.5A15316 - ImmediateView Details
CURRENT SENSOR HE 30A 12-QFNACS711KEXLT-30AU-TCURRENT SENSOR HE 30A 12-QFNAC/DCHall Effect30A0 - ImmediateView Details
CURRENT SENSOR HE/OL 31A 12-QFNACS711KEXLT-31AB-TCURRENT SENSOR HE/OL 31A 12-QFNAC/DCHall Effect, Open Loop31A75430 - ImmediateView Details
CURRENT SEN HE/OL 12.5A 8-SOICACS711KLCTR-12AB-TCURRENT SEN HE/OL 12.5A 8-SOICAC/DCHall Effect, Open Loop12.5A19390 - ImmediateView Details
CURRENT SENSOR HE/OL 25A 8-SOICACS711KLCTR-25AB-TCURRENT SENSOR HE/OL 25A 8-SOICAC/DCHall Effect, Open Loop25A52 - ImmediateView Details
CURRENT SEN HE/OL 15.5A 12-QFNACS711KEXLT-15AB-TCURRENT SEN HE/OL 15.5A 12-QFNAC/DCHall Effect, Open Loop15.5A49569 - ImmediateView Details
CURRENT SENSOR HE 25A 8-SOICACS711KLCTR-25AU-TCURRENT SENSOR HE 25A 8-SOICAC/DCHall Effect25A0 - ImmediateView Details

ACS7140

ImageManufacturer Part NumberDescriptionFor MeasuringSensor TypeCurrent - SensingAvailable QuantityView Details
CURRENT SENSOR HE/OL 10A 12-QFNACS71240KEXBLT-010B3CURRENT SENSOR HE/OL 10A 12-QFNAC/DCHall Effect, Open Loop10A8625 - ImmediateView Details
CURRENT SENSOR HE/OL 10A 8-SOICACS71240LLCBTR-010B3CURRENT SENSOR HE/OL 10A 8-SOICAC/DCHall Effect, Open Loop10A8410 - ImmediateView Details
CURRENT SENSOR HE/OL 30A 8-SOICACS71240LLCBTR-030B3CURRENT SENSOR HE/OL 30A 8-SOICAC/DCHall Effect, Open Loop30A6286 - ImmediateView Details
CURRENT SENSOR HE/OL 50A 12-QFNACS71240KEXBLT-050U5CURRENT SENSOR HE/OL 50A 12-QFNAC/DCHall Effect, Open Loop50A3778 - ImmediateView Details
CURRENT SENSOR HE/OL 45A 8-SOICACS71240LLCBTR-045B5CURRENT SENSOR HE/OL 45A 8-SOICAC/DCHall Effect, Open Loop45A9968 - ImmediateView Details
CURRENT SENSOR HE/OL 50A 8-SOICACS71240LLCBTR-050U5CURRENT SENSOR HE/OL 50A 8-SOICAC/DCHall Effect, Open Loop50A3117 - ImmediateView Details
CURRENT SENSOR HE/OL 10A 12-QFNACS71240KEXBLT-010B3-115CURRENT SENSOR HE/OL 10A 12-QFNAC/DCHall Effect, Open Loop10A5503 - ImmediateView Details
CURRENT SENSOR HE/OL 30A 12-QFNACS71240KEXBLT-030B3CURRENT SENSOR HE/OL 30A 12-QFNAC/DCHall Effect, Open Loop30A28479 - ImmediateView Details
CURRENT SENSOR HE/OL 30A 12-QFNACS71240KEXBLT-030B5CURRENT SENSOR HE/OL 30A 12-QFNAC/DCHall Effect, Open Loop30A8819 - ImmediateView Details
CURRENT SENSOR HE/OL 20A 8-SOICACS71240LLCBTR-020U5CURRENT SENSOR HE/OL 20A 8-SOICAC/DCHall Effect, Open Loop20A1714 - ImmediateView Details

Eval Boards

ImageManufacturer Part NumberDescriptionSensor TypeSensing RangeInterfaceAvailable QuantityView Details
EVAL BOARD FOR ACS37220 100B3ACSEVB-EZ7-37220-100B3EVAL BOARD FOR ACS37220 100B3Current Sensor±100AAnalog5 - ImmediateView Details
EVAL BOARD FOR ACS37220 100B5ACSEVB-EZ7-37220-100B5EVAL BOARD FOR ACS37220 100B5Current Sensor±100AAnalog9 - ImmediateView Details
EVAL BOARD FOR ACS37220 150B3ACSEVB-EZ7-37220-150B3EVAL BOARD FOR ACS37220 150B3Current Sensor±150AAnalog9 - ImmediateView Details
EVAL BOARD FOR ACS37220 150B5ACSEVB-EZ7-37220-150B5EVAL BOARD FOR ACS37220 150B5Current Sensor±150AAnalog3 - ImmediateView Details
EVAL BOARD FOR ACS37220 200B5ACSEVB-EZ7-37220-200B5EVAL BOARD FOR ACS37220 200B5Current Sensor±200AAnalog4 - ImmediateView Details
EVALUATION BARE BOARDACSEVB-LC8-LZ6EVALUATION BARE BOARDCurrent Sensor-Analog25 - ImmediateView Details
EVALUATION BARE BOARDACSEVB-EX12EVALUATION BARE BOARDCurrent Sensor-Analog29 - ImmediateView Details
HALL CURRENT 2 CLICKMIKROE-2987HALL CURRENT 2 CLICKmikroBUS™ Click™SensorMagnetic Hall Effect1 - ImmediateView Details
HALL CURRENT 20 CLICKMIKROE-6464HALL CURRENT 20 CLICKmikroBUS™ Click™SensorCurrent13 - ImmediateView Details