ACHS-7123 Datasheet | Broadcom

ACHS-7121/7122/7123 Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 3 k VRMS Isolation and Low-Resistance Current Conductor Data Sheet Overview The Broad® ACHS-7121/7122/7123 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-7121/7122/7123 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 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 ACHS-7121 ACHS-7122 ACHS-7123 Current Range ±10A ±20A ±30A Sensitivity 185 m V/A 100 m V/A 66 m V/A Features - Wide Operating Temperature: - 40ºC to 110ºC - Primary conductor resistance: 0.7 mΩ typ. - Sensing current range: ±10A, ±20A, and ±30A - Output sensitivity: 66 to 185 m V/A - Output voltage proportional to AC or DC currents - Ratiometric output from supply voltage - Single supply operation: 5.0V - Low-noise analog signal path - Device bandwidth is set via FILTER pin: 80 k Hz typ. Bandwidth with 1 n F...