ACS709LLFTR-20BB-T

Current Sensors Overview

The ACS709LLFTR-20BB-T is a high-bandwidth, fast fault response current sensor IC from Allegro MicroSystems. It utilizes open-loop Hall effect technology to provide precise AC/DC current sensing with a 20A rating and bidirectional capability. The device features a sensitivity of 56mV/A, ±2% accuracy, and ±0.25% linearity. It operates on a 3V to 5.5V supply, draws a maximum of 14.5mA, and has a 4µs response time. The bandwidth extends to 120kHz, and it functions within a -40°C to 150°C temperature range. Packaged in a thermally enhanced 24-QSOP.

Current Sensors Feature Summary

• Open-loop Hall effect technology for economical and precise current sensing
• High bandwidth and fast fault response capabilities
• Bidirectional measurement for both AC and DC currents

Current Sensors Applications

• Industrial motor control systems
• Automotive power management circuits
• Commercial inverter and converter designs

Current Sensors Procurement Notes

Verify the specific suffix BB-T against the manufacturer's latest datasheet to confirm pinout and electrical characteristics match the design requirements. Check component status as some listings indicate 'Not Recommended for New Designs'. Ensure thermal management aligns with the thermally enhanced package specifications during integration.

Current Sensors Selection Notes

Select this component when high-speed fault detection and wide bandwidth are critical for system protection. The bidirectional nature supports complex load profiles requiring accurate current direction monitoring. Consider the 24-pin QSOP package size and thermal dissipation needs relative to the application's power density constraints.

Current Sensors Part Context

This part belongs to the ACS709 series, designed for robust current sensing in demanding environments. It integrates Hall sensors and signal processing on a single die, offering isolation between the current path and the output signal. The series targets applications requiring reliable performance across automotive and industrial temperature ranges.

Current Sensors Replacement Considerations

Direct substitutes include other ACS709 variants with different current ratings or packaging options. Verify compatibility regarding sensitivity, accuracy class, and package dimensions before swapping. Cross-reference with Allegro's official replacement guides for updated recommendations.