ACS712ELCTR-20A-T ACS712ELCTR-05B-T SOIC-8 美国ALEEGRO电流传感器

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, switchmode 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. The output of the device has a positive slope (>VIOUT(Q))  when an increasing current flows through the primary copper  conduction path (from pins 1 and 2, to pins 3 and 4), which is  the path used for current sampling. The internal resistance of  this conductive path is 1.2 mΩ typical, providing low power  loss.

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