ACHS-7125 Datasheet | Broadcom

ACHS-7124/7125 Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 3 k VRMS Isolation and Low-Resistance Current Conductor Data Sheet Description The Broad® ACHS-7124/7125 product series is a fully integrated Hall Effect-based isolated linear current sensor device family designed for AC or DC current sensing in industrial, mercial, and munications systems. Each of the ACHS-7124/7125 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 that 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 CMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope (>VOUT(Q)) when an increasing current flows through the primary 4 oz 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 0.7 mΩ typical, providing low power loss. The terminals of the conductive path are electrically isolated from the signal leads (pins 5 through 8). This performance is delivered in a pact, surface mountable, SO-8 package that meets worldwide regulatory safety standards. Part Number Current Range Sensitivity ACHS-7124 ±40A 50 m V/A ±50Aa 40 m V/A a. Due to the SO-8 package power dissipation limitations, the input RMS or DC current of 50A product needs to be derated above 85°C ambient at - 25.2 m W/°C on 4 oz copper PCB. Features - Wide operating temperature: - 40ºC to +110ºC - Internal conductor resistance: 0.7 mΩ typ. - Sensing current range ±40A and ±50A (see the table footnotea under the part number table to the left) - Output sensitivity: 40m V/A to 50 m V/A - Output...