Quality Standards and Environmental Certifications

ACS37612: Standalone Coreless Differential Current Sensor IC

ACS37612: a standalone Hall-based coreless current sensor that measures currents from 200A to >1000A without requiring a core or a shield.

ACS37612 ECAD Model
ACS37612 Datasheet
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Packaging

The ACS37612 is a standalone coreless current sensor IC that provides an economical and precise solution for AC and DC current sensing without requiring a magnetic concentrator core or a shield. The ACS37612 measures currents from 200A to >1000A flowing through a PCB or a busbar with a typical accuracy of 1%.

The differential Hall-based sensing topology used to measure the magnetic field virtually eliminates error from common-mode stray magnetic field without the need of a laminated shield required by competing solutions, which reduces the design size and bill of materials (BOM). High isolation is achieved via the no-contact nature of this simple assembly. A 240KHz bandwidth makes it ideal for inverter phase current sensing, load detection and management, power supplies and DC/DC converters where fast switching is required. The high response time enables overcurrent fault detection in safety critical applications. A –40°C to 150°C ambient operating temperature and a stellar ESD rating make it ready for the harsh automotive environment.

The ACS37612 is offered in a low-profile 8-pin surface mount TSSOP package (thin-shrink small outline package, suffix LU) that is ideal for space-constrained applications, while allowing simple surface mount assembly.

  • Eliminates the need for a concentrator core or a shield
  • Contactless, lossless current sensing for applications where current flows through busbar or PCB
  • Differential sensing rejects common-mode stray fields
  • 3.3 and 5.0 V single supply operation
  • Monolithic Hall IC for high reliability with up to 240 kHz sensor bandwidth
  • Factory-trimmed sensitivity and offset for improved accuracy

Automotive

Industrial

8-Pin-TSSOP-LU-Package, used in the ACS37612 coreless differential current sensor IC

The ACS37612 is offered in a low-profile 8-pin surface mount TSSOP package (thin-shrink small outline package, suffix LU) that is ideal for space-constrained applications, while allowing simple surface mount assembly. 

LU Package Documentation

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Part Number Specifications and Availability

Documentation & Resources

Technical Article

Rethink PCB Current Sensing

This article will discuss two new innovative approaches to measure currents up to 600 A in PCB: a near-lossless Hall-based current sensor with an integrated conductor and a non-invasive standalone core-free and shield-free differential Hall current sensor.

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Application Note

PCB Ground Plane Optimization for Coreless Current Sensor Applications

January 31, 2023

AN296277 - This application note provides guidelines on how a PCB ground plane around the sensor location should be designed to achieve optimum performances.

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Brochure

Brochure: Allegro Coreless Current Sensing

Allegro’s Coreless Current Sensing Technology provides a highly accurate method of measuring hundreds or thousands of amps flowing through a busbar or a PCB without needing a concentrator core or U-Shaped Magnetic Shield.

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Application Note

Transient Current Behavior in Applications using the Allegro Coreless ACS37610 Differential Current Sensor

AN296258 - This application note explains how the conductor design can impact the response time of the current measurement for coreless current sensing applications and provides examples of response time to transient current for two types of conductors.

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Application Note

Guidelines for Designing a Busbar with Notch for Allegro's ACS37612 Differential Coreless Current Sensor

AN296188 - This application note offers guidelines for achieving optimum busbar and notch designs using the Allegro ACS37612 coreless current sensor

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The ACS3761X Hall-effect sensor IC solution family is a coreless and shield-free solution, reducing BOM and overall inverter size and weight. These differential sensors reject stray magnetic fields, reducing reliance on software. The family is optimized for a large range of currents, 100 A to >4000 A, making it ideal for automotive applications.
The ACS3761X Hall-effect sensor IC solution family is a coreless and shield-free solution, reducing BOM and overall inverter size and weight. These differential sensors reject stray magnetic fields, reducing reliance on software. The family is optimized for a large range of currents, 100 A to >4000 A, making it ideal for automotive applications.

Documentation and Resources

Documentation

Design Tools

Filter Document Type:
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All Types Application Note Brochure FAQ Selection Guide Technical Article
Documents Found: 32
Document Type Document Name
Application Note
January 31, 2023
PCB Ground Plane Optimization for Coreless Current Sensor Applications
Application Note
Transient Current Behavior in Applications using the Allegro Coreless ACS37610 Differential Current Sensor
Application Note
Guidelines for Designing a Busbar with Notch for Allegro's ACS37612 Differential Coreless Current Sensor
Brochure
Brochure: Allegro Coreless Current Sensing
FAQ
Current Sensors FAQ
Selection Guide
Allegro Product Selection Guide
Technical Article
Rethink PCB Current Sensing
Technical Article
Common Driver Platform for 12V and 48V Systems Simplifies EV Starter Generator Designs
Filter Document Type:
All Types
All Types Calculator Gerber File Simulation Tool SPICE Model Third Party Tool User Guide
Documents Found: 32
Document Type Document Name
Calculator
Busbar Design for Coreless DC Current Sensors
Calculator
Coreless PCB Calculator
Gerber File
ASEK37612LU 3.5mm EVB Gerber Files
Gerber File
ASEK37612LU 4.5mm EVB Gerber Files
Gerber File
ASEK37612LU 7mm EVB Gerber Files
Gerber File
ASEK37612LU Busbar EVB Gerber Files
Simulation Tool
Busbar Notch Field Simulation for AC and DC Coreless Current Sensor
Simulation Tool
Current Sensor Error and Resolution
SPICE Model
ACS LTspice Library
Third Party Tool
PCB Notch Design for Coreless DC Current Sensor
User Guide
ASEK37612 Demo Board User’s Guide
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