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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 LOW-RESISTANCEACS37220LEZATR-100B3CURRENT SENSOR LOW-RESISTANCEDCHall Effect100A4424 - ImmediateView Details
CURRENT SENSOR LOW-RESISTANCEACS37220LEZATR-100B5CURRENT SENSOR LOW-RESISTANCEDCHall Effect100A4738 - ImmediateView Details
CURRENT SENSOR LOW-RESISTANCEACS37220LEZATR-150B3CURRENT SENSOR LOW-RESISTANCEDCHall Effect100A4625 - ImmediateView Details
CURRENT SENSOR LOW-RESISTANCEACS37220LEZATR-150B5CURRENT SENSOR LOW-RESISTANCEDCHall Effect150A5855 - ImmediateView Details
CURRENT SENSOR LOW-RESISTANCEACS37220LEZATR-200B5CURRENT SENSOR LOW-RESISTANCEDCHall Effect200A4096 - ImmediateView Details

ACS711

ImageManufacturer Part NumberDescriptionFor MeasuringSensor TypeCurrent - SensingAvailable QuantityView Details
SENSOR CURRENT HALL 12.5A AC/DCACS711ELCTR-12AB-TSENSOR CURRENT HALL 12.5A AC/DCAC/DCHall Effect, Open Loop12.5A15618 - ImmediateView Details
CURRENT SENSOR WITH OVERCURRENTACS711KEXLT-30AU-TCURRENT SENSOR WITH OVERCURRENTAC/DCHall Effect30A0 - ImmediateView Details
SENSOR CURRENT HALL 31A AC/DCACS711KEXLT-31AB-TSENSOR CURRENT HALL 31A AC/DCAC/DCHall Effect, Open Loop31A85596 - ImmediateView Details
SENSOR CURRENT HALL 12.5A AC/DCACS711KLCTR-12AB-TSENSOR CURRENT HALL 12.5A AC/DCAC/DCHall Effect, Open Loop12.5A19845 - ImmediateView Details
SENSOR CURRENT HALL 25A AC/DCACS711KLCTR-25AB-TSENSOR CURRENT HALL 25A AC/DCAC/DCHall Effect, Open Loop25A181 - ImmediateView Details
SENSOR CURRENT HALL 15.5A AC/DCACS711KEXLT-15AB-TSENSOR CURRENT HALL 15.5A AC/DCAC/DCHall Effect, Open Loop15.5A52542 - ImmediateView Details
CURRENT SENSOR WITH OVERCURRENTACS711KLCTR-25AU-TCURRENT SENSOR WITH OVERCURRENTAC/DCHall Effect25A0 - ImmediateView Details

ACS7140

ImageManufacturer Part NumberDescriptionFor MeasuringSensor TypeCurrent - SensingAvailable QuantityView Details
SENSOR CURRENT HALL 10A 12PWRQFNACS71240KEXBLT-010B3SENSOR CURRENT HALL 10A 12PWRQFNAC/DCHall Effect, Open Loop10A0 - ImmediateView Details
SENSOR CURRENT HALL 10A 8SOICACS71240LLCBTR-010B3SENSOR CURRENT HALL 10A 8SOICAC/DCHall Effect, Open Loop10A1341 - ImmediateView Details
SENSOR CURRENT HALL 30A 8SOICACS71240LLCBTR-030B3SENSOR CURRENT HALL 30A 8SOICAC/DCHall Effect, Open Loop30A9435 - ImmediateView Details
SENSOR CURRENT HALL 50A 12PWRQFNACS71240KEXBLT-050U5SENSOR CURRENT HALL 50A 12PWRQFNAC/DCHall Effect, Open Loop50A3778 - ImmediateView Details
SENSOR CURRENT HALL 45A 8SOICACS71240LLCBTR-045B5SENSOR CURRENT HALL 45A 8SOICAC/DCHall Effect, Open Loop45A10557 - ImmediateView Details
SENSOR CURRENT HALL 50A 8SOICACS71240LLCBTR-050U5SENSOR CURRENT HALL 50A 8SOICAC/DCHall Effect, Open Loop50A3387 - ImmediateView Details
SENSOR CURRENT HALL 10A 12PWRQFNACS71240KEXBLT-010B3-115SENSOR CURRENT HALL 10A 12PWRQFNAC/DCHall Effect, Open Loop10A5828 - ImmediateView Details
SENSOR CURRENT HALL 30A 12PWRQFNACS71240KEXBLT-030B3SENSOR CURRENT HALL 30A 12PWRQFNAC/DCHall Effect, Open Loop30A23120 - ImmediateView Details
SENSOR CURRENT HALL 30A 12PWRQFNACS71240KEXBLT-030B5SENSOR CURRENT HALL 30A 12PWRQFNAC/DCHall Effect, Open Loop30A8819 - ImmediateView Details
CURRENT SENSOR IC WITH COMMON MOACS71240LLCBTR-020U5CURRENT SENSOR IC WITH COMMON MOAC/DCHall Effect, Open Loop20A1757 - ImmediateView Details

Eval Boards

ImageManufacturer Part NumberDescriptionPlatformTypeFunctionAvailable QuantityView Details
HALL CURRENT 20 CLICKMIKROE-6464HALL CURRENT 20 CLICKmikroBUS™ Click™SensorCurrent13 - ImmediateView 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±150AAnalog4 - 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-Analog18 - ImmediateView Details
EVALUATION BARE BOARDACSEVB-EX12EVALUATION BARE BOARDCurrent Sensor-Analog29 - ImmediateView Details
HALL CURRENT 2 CLICKMIKROE-2987HALL CURRENT 2 CLICKmikroBUS™ Click™SensorMagnetic Hall Effect0 - ImmediateView Details