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ACS712ELCTR-05B

ACS712ELCTR-05B

Allegro MicroSystems
Lower-range version (5 A) from the same ACS712 family for higher resolution at small currents.
46,237 in stock
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Overview

The ACS712ELCTR-05B is a Hall-effect based linear current sensor designed for precise AC or DC current sensing up to 5 A. It features a copper conduction path located near the surface of the die, allowing the magnetic field generated by current flow to be converted into a proportional ratiometric voltage. The device provides 2.1 kV RMS isolation and a low-resistance path of 1.2 milliohms to minimize power loss in the application.

Why Choose This Part

This sensor offers a high sensitivity of 185mV/A, making it ideal for resolving small current changes that larger-range sensors might miss. The 80kHz bandwidth and internal 5us response time support high-speed switching applications while the SOIC-8 package provides a compact footprint with integrated galvanic isolation.

Applications

Low-Power Motor Control
Monitoring phase currents in small DC or stepper motors for torque control and stall detection.
Switch-Mode Power Supplies (SMPS)
Providing feedback for current-mode control loops or monitoring output rails for load regulation.
Overcurrent Fault Protection
Fast 5us response time allows for rapid shutdown of sensitive electronics during short-circuit events.
Solar Inverter Monitoring
Tracking low-level current strings in photovoltaic systems to ensure optimal energy harvesting.

Key Specifications

Output Ratiometric, Voltage
Accuracy +/-1.5%
Frequency DC ~ 80kHz
Linearity +/-1.5%
Sensitivity 185mV/A
Sensor Type Hall Effect, Open Loop
Polarization Bidirectional
For Measuring AC/DC
Mounting Type Surface Mount
Response Time 5us
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 5V
Current - Sensing 5A
Number of Channels 1
Operating Temperature -40degC ~ 85degC
Current - Supply (Max) 13mA
Supplier Device Package 8-SOIC

Getting Started

To implement this sensor, connect the conduction path (pins 1/2 to 3/4) in series with the load and provide a stable 5V DC supply to VCC. The analog output (VI_OUT) can be interfaced directly to a 5V ADC on a microcontroller; for 3.3V systems, use a simple resistor divider or level shifter. Adding a capacitor to the FILTER pin allows for bandwidth adjustment to reduce noise at the cost of response time.

Also Consider

ACS712ELCTR-20A-T Allegro MicroSystems - Same family and footprint but rated for up to 20A if the system load requirements increase.
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