DESCRIPTION

· The Broadcom® ACHS-7121/7122/7123 series is a fully integrated Hall Effect-based isolated linear current sensor family.

· Designed for AC or DC current sensing in industrial, commercial, and communications systems.

· Features a precise, low-offset, linear Hall circuit with a copper conduction path near the die surface.

· Converts applied current into a proportional voltage via magnetic field detection.

· Optimized accuracy through close proximity of the magnetic signal to the Hall transducer.

· Provides a precise, proportional voltage with low-offset, chopper-stabilized CMOS Hall IC.

· Output voltage has a positive slope with increasing current through the primary copper conduction path.

· Internal resistance of the conductive path is 0.7 mΩ typical, ensuring low-power loss.

· Electrically isolated terminals from signal leads, packaged in a compact SO-8 package meeting global safety standards.

FEATURES

· Wide operating temperature range: –40ºC to 110ºC.

· Primary conductor resistance: 0.7 mΩ typical.

· Sensing current ranges: ±10A, ±20A, and ±30A.

· Output sensitivity: 66 to 185 mV/A.

· Ratiometric output from supply voltage, single supply operation: 5.0V.

· Low-noise analog signal path, device bandwidth set via FILTER pin: 80 kHz typical with 1-nF filter capacitor.

· Factory-trimmed for accuracy, extremely stable output offset voltage, near zero magnetic hysteresis.

· Typical total output error: ±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.