industry news
Subscribe Now

Allegro Microsystems, LLC Introduces New Galvanically Isolated Current Sensor IC

Worcester, MA – August 28, 2014 – Allegro MicroSystems, LLC introduces a new Allegro current sensor IC that is an economical and precise solution for AC current sensing in industrial, commercial, and communications systems. Allegro’s ACS726 is the first current sensor IC to include a fully differential back end amplifier that can be used to adjust gain and bandwidth via external RC networks. The back end amplifier is fully independent and when unused, can be powered down to reduce power consumption. The fully differential output of this device gives better immunity to output offset drift as well as common mode noise.

The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and over current fault protection.

The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

The output of the device has a positive differential voltage (VOUTP – VOUTN) when an increasing current flows through the primary copper conduction path (from pins 1 through 6, to pins 7 through 12), which is the path used for current sensing. The internal resistance of this conductive path is 1.1 m? typical, providing low power loss.

The terminals of the conductive path are electrically isolated from the sensor IC signal leads (pins 13 through 24). This allows the ACS726 current sensor IC to be used in high-side current sense applications without the use of high-side differential amplifiers or other costly isolation techniques.

The ACS726 is provided in a small, low-profile surface mount QSOP-24 package (suffix LF). The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device, excluding the BAE, is fully calibrated prior to shipment from the factory.

Pricing for 1,000 pieces is as follows:

  • ACS726LLFTR-20AB-T:       $1.73
  • ACS726LLFTP-40AB-T:        $1.73 

About Allegro

Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro’s innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.

Leave a Reply

featured blogs
Mar 28, 2024
'Move fast and break things,' a motto coined by Mark Zuckerberg, captures the ethos of Silicon Valley where creative disruption remakes the world through the invention of new technologies. From social media to autonomous cars, to generative AI, the disruptions have reverberat...
Mar 26, 2024
Learn how GPU acceleration impacts digital chip design implementation, expanding beyond chip simulation to fulfill compute demands of the RTL-to-GDSII process.The post Can GPUs Accelerate Digital Design Implementation? appeared first on Chip Design....
Mar 21, 2024
The awesome thing about these machines is that you are limited only by your imagination, and I've got a GREAT imagination....

featured video

We are Altera. We are for the innovators.

Sponsored by Intel

Today we embark on an exciting journey as we transition to Altera, an Intel Company. In a world of endless opportunities and challenges, we are here to provide the flexibility needed by our ecosystem of customers and partners to pioneer and accelerate innovation. As we leap into the future, we are committed to providing easy-to-design and deploy leadership programmable solutions to innovators to unlock extraordinary possibilities for everyone on the planet.

To learn more about Altera visit: http://intel.com/altera

featured chalk talk

Achieving High Power Density with IGBT and SiC Power Modules
Sponsored by Mouser Electronics and Infineon
Recent trends in the inverter market have made high power density, scalability, and ease of assembly more important than ever before. In this episode of Chalk Talk, Amelia Dalton and Abraham Markose from Infineon examine how Easy & Econo power modules from Infineon can help solve common inverter design requirements. They explore the benefits and construction of these modules and how you can take advantage of them in your next design.
May 19, 2023
34,564 views