The ACS724LLCTR-20AB-T from Allegro MicroSystems is a high-accuracy, low-noise, Hall-effect-based current sensor IC designed for AC and DC current sensing applications. This device provides a ratiometric voltage output that is proportional to the measured current, ensuring precise, stable, and reliable current monitoring across a wide range of industrial and consumer systems.

Built on Allegro’s advanced Hall-effect technology with galvanic isolation, the ACS724 allows for safe current measurement without direct electrical contact. With a ±20A sensing range, high 100mV/A sensitivity, and excellent ±0.8% accuracy, this sensor is ideal for motor control, battery monitoring, power supplies, and embedded systems requiring precise bidirectional current measurement.

Its surface-mount SOIC-8 package makes it compact and suitable for high-density PCB designs. The wide operating temperature range (-40°C to +150°C) makes it reliable for automotive, industrial, and energy applications in harsh environments.

Features:

• Hall Effect, open-loop current sensor

• Measures both AC and DC currents

• ±20A bidirectional current sensing range

• Sensitivity: 100mV/A for precise measurement

• Voltage output, ratiometric to supply voltage

• Low noise and fast 4 µs response time

• Excellent accuracy: ±0.8%

• Linearity: ±1.5%

• Wide supply voltage: 4.5V to 5.5V

• Frequency response: DC ~ 120kHz

• Galvanic isolation for safe current sensing

• Compact 8-SOIC package for surface mount applications

• RoHS compliant and lead-free

Specifications:

• Manufacturer: Allegro MicroSystems

• Part Number: ACS724LLCTR-20AB-T

• Type: Hall Effect Current Sensor, Open Loop

• Current Range: ±20A

• Sensitivity: 100mV/A

• Output Type: Ratiometric Voltage

• Channels: 1

• Frequency Bandwidth: DC to 120kHz

• Response Time: 4µs

• Accuracy: ±0.8%

• Linearity: ±1.5%

• Supply Voltage: 4.5V – 5.5V

• Supply Current: 14mA max

• Operating Temperature: –40°C to +150°C

• Mounting: Surface Mount (SMT)

• Package: SOIC-8 (3.90mm width)

• Applications: Motor control, battery management systems (BMS), uninterruptible power supplies (UPS), solar inverters, automotive systems, industrial automation, robotics, consumer electronics

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