ACS723LLCTR-20AB-T

Current Sensors Overview

The Allegro MicroSystems ACS723LLCTR-20AB-T is a high-accuracy, galvanically isolated current sensor IC utilizing Hall effect and flip-chip technology. It provides an analog voltage output proportional to the sensed current with a sensitivity of 100mV/A. The device supports bidirectional measurement for AC/DC currents up to 20A. Key electrical parameters include a supply voltage range of 4.5V to 5.5V, maximum supply current of 14mA, and a bandwidth of 80kHz. It features ±3% accuracy, ±1% linearity, and a response time of 5µs. The component operates within a temperature range of -40°C to 150°C and is housed in an 8-SOIC package.

Current Sensors Feature Summary

• Provides 3000 Vrms galvanic isolation between the current path and electronic circuit using flip-chip technology
• Delivers high precision over the full operating temperature range with typical output error of 1%
• Enables direct board-mount sensing for both AC and DC current applications without external transformers

Current Sensors Applications

• Motor control systems requiring precise current feedback
• Switch-mode power supplies (SMPS) for load monitoring
• Over-current protection circuits in industrial equipment
• Battery management systems for charge/discharge tracking

Current Sensors Procurement Notes

Verify the specific suffix AB-T against the manufacturer datasheet to confirm pinout and sensitivity alignment. Ensure the 8-SOIC package dimensions match the PCB footprint requirements. Check RoHS compliance status and moisture sensitivity level (MSL 2) for proper storage and reflow soldering profiles. Confirm that the 20A rating aligns with the thermal management capabilities of the target application design.

Current Sensors Selection Notes

Select this component when high isolation voltage and compact surface-mount packaging are required. The 100mV/A sensitivity offers a balance between signal strength and dynamic range for 20A applications. Consider the 5µs response time for fast transient detection needs. Evaluate the ±3% accuracy specification against system tolerance requirements. Compare thermal resistance characteristics if operating near the upper temperature limit.

Current Sensors Part Context

This part belongs to the ACS723 family of Hall-effect current sensors from Allegro MicroSystems. The LLCTR variant denotes the leadless LGA-like SOIC package configuration optimized for automated assembly. The 20AB-T designation specifies the 20A current rating, bidirectional operation, and tape-and-reel packaging format. This series is designed for applications demanding reliable isolation and accurate current measurement in space-constrained environments.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers: ACS723LLCTR-10AB-T, ACS723LLCTR-30AB-T, ACS723LLCTR-05AB-T.