Overview
The Broadcom® 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, commercial, and communications 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.

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 mV/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 kHz typ. Bandwidth with 1 nF filter capacitor
◾ Factory-trimmed for accuracy
◾ Extremely stable output offset voltage
◾ Near zero magnetic hysteresis
◾ Typical total output error of ±1.5%
◾ >25 kV/μs Common-Mode Transient Immunity
◾ Small footprint, low-profile SO-8 package
◾ Worldwide Safety Approval: UL, CSA:
   Isolation Voltage 3 kVRMS, 1 minute

APPLICATIONs
◾ Low-power inverter current sensing
◾ Motor phase and rail current sensing
◾ Solar inverters
◾ Chargers and Converters
◾ Switching Power Supplies