ACS712屬于傳感器變送器的電流傳感器。由Allegro MicroSystems制造生產的ACS712電流傳感器電流傳感器用于檢測并響應電線或電路中的電流變化。傳感器類型包括電流開關式、磁通門式、霍爾效應式、電流指示器、電流傳感器、磁調制器、磁阻式和變壓器式（帶調節(jié)功能），電流檢測范圍可編程設置在 5mA 至 2500A 之間，可用于測量交流或直流電流。

描述 Description

The Allegro? ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switch mode power supplies, and overcurrent fault protection. The device is not intended for automotive applications.

The device consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

Features and Benefits

? Low-noise analog signal path

? Device bandwidth is set via the new FILTER pin

? 5 μs output rise time in response to step input current

? 80 kHz bandwidth

? Total output error 1.5 at TA= 25°C

? Small footprint, low-profile SOIC8 package

? 1.2 mΩ internal conductor resistance

? 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8

? 5.0 V, single supply operation

? 66 to 185 mV/A output sensitivity

? Output voltage proportional to AC or DC currents

? Factory-trimmed for accuracy

? Extremely stable output offset voltage

? Nearly zero magnetic hysteresis

? Ratiometric output from supply voltage