ACHS-7121-000E

ACHS-7121-000E is a fully integrated hall effect-based isolated linear current sensor device designed for AC or DC current sensing in industrial, commercial, and communications systems. The ±10A rated ACHS-7121 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 differential hall transducers. A precise, proportional voltage is provided by the low-offset, chopper-stabilized CMOS hall IC, which is programmed for accuracy after packaging. Applications include low-power inverter current sensing, motor phase and rail current sensing, solar inverters, chargers and converters, switching power supplies.

• Output voltage proportional to AC or DC currents, low-noise analogue signal path
• Ratiometric output from supply voltage, single supply operation: 5.0V
• Device bandwidth is set via FILTER pin:80KHz typ. bandwidth with 1nF filter capacitor
• Extremely stable output offset voltage, near zero magnetic hysteresis
• Typical total output error of ±1.5%, >25kV/µs common-mode transient immunity
• Worldwide safety approval: UL, CSA: isolation voltage 3kVRMS, 1 minute
• Wide operating temperature range from -40ºC to 110ºC
• Primary conductor resistance is 0.7mohm typical
• Sensitivity is 185mV/A typ at -10A = IP = 10A, TA = 25°C, VDD = 5.0V, CF = 1nF
• Small footprint, low-profile SO-8 package