Allegro MicroSystems ACS709LLFTR-35BB-T

The Allegro™ ACS709LLFTR-35BB-T current sensor IC, produced by Allegro MicroSystems, offers an economical and precise solution for current sensing applications across various industries, including industrial, automotive, commercial, and communications systems. This device features a precision linear Hall sensor integrated circuit with a copper conduction path, allowing for accurate measurement of current by tracking the magnetic field generated by the applied current. The patented packaging configuration ensures high accuracy by placing the Hall element in close proximity to the current being measured. Additionally, the device includes Allegro's proprietary integrated shield technology, which provides high-level immunity to current conductor dV/dt and stray electric fields, resulting in low output ripple and low offset drift in high-side applications.

• Precision Linear Hall Sensor: The ACS709 features a precision linear Hall sensor integrated circuit with a copper conduction path, ensuring accurate current measurement.
• High Accuracy: The patented packaging configuration maximizes accuracy by placing the Hall element in close proximity to the current being measured.
• Integrated Shield Technology: Allegro's proprietary integrated shield technology provides high-level immunity to current conductor dV/dt and stray electric fields, resulting in low output ripple and low offset drift.
• Overcurrent Fault Detection: The device includes a voltage input (VOC pin) for defining an overcurrent fault threshold, and an open-drain Overcurrent Fault pin that transitions to a logic low state when the threshold is exceeded.
• Low Power Loss: The internal resistance of the copper path is typically 1.1 mΩ, minimizing power loss.
• Electrical Isolation: The current conduction path is electrically isolated from the low voltage device inputs and outputs, eliminating the need for opto-isolators or other costly isolation techniques.

• Industrial Systems: Suitable for various industrial applications requiring precise current sensing.
• Automotive Systems: Used in automotive systems for monitoring and controlling electrical currents.
• Commercial Systems: Applicable in commercial environments for current sensing and monitoring.
• Communications Systems: Employed in communications systems to ensure reliable and accurate current measurement.

1. What is the operating temperature range of the ACS709LLFTR-35BB-T?

   The operating temperature range is from -40°C to 150°C.

2. What is the supply voltage range for the ACS709LLFTR-35BB-T?

   The supply voltage range is from 3 V to 5 V.

3. What is the quiescent current of the ACS709LLFTR-35BB-T?

   The quiescent current is typically 11 mA at VCC = 5 V.

4. What is the linear sensing range of the ACS709LLFTR-35BB-T?

   The linear sensing range is from -75 A to 75 A.

5. What is the sensitivity of the ACS709LLFTR-35BB-T?

   The sensitivity is typically 28 mV/A.

6. What is the internal resistance of the copper path in the ACS709LLFTR-35BB-T?

   The internal resistance of the copper path is typically 1.1 mΩ.

7. What type of package does the ACS709LLFTR-35BB-T come in?

   The device comes in a 24-SSOP package.

8. How does the ACS709LLFTR-35BB-T handle overcurrent faults?

   The device includes a voltage input (VOC pin) for defining an overcurrent fault threshold, and an open-drain Overcurrent Fault pin that transitions to a logic low state when the threshold is exceeded.

9. Is the ACS709LLFTR-35BB-T electrically isolated?

   Yes, the current conduction path is electrically isolated from the low voltage device inputs and outputs.

10. In what industries is the ACS709LLFTR-35BB-T commonly used?

    The ACS709LLFTR-35BB-T is commonly used in industrial, automotive, commercial, and communications systems.