Description

The Broadcom® ACHS-719x (±10A to ±50A) fully integrated

Hall-effect based isolated linear current sensors are

designed for AC or DC current sensing in industrial,

commercial, and communications systems. Inside each

ACHS-719x IC is 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 differential Hall

sensors convert into a proportional voltage. Device

accuracy is optimized across the operating ambient

temperature through the close proximity of the magnetic

signal to the Hall sensors.

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 compact, surface

mountable, SO-8 package that meets worldwide regulatory

safety standards.

Features

 Wide operating temperature: –40ºC to +110ºC

 Internal conductor resistance: 0.7 mΩ typ.

 Sensing current range: ± 10A ~ ± 50A

 Output sensitivity: 40 mV/A 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 the new FILTER pin

– 80 kHz typ. bandwidth with 1-nF filter capacitor

 Factory-trimmed for accuracy

 Extremely stable output offset voltage

 Near-zero magnetic hysteresis

 Maximum output error of ±6.0 across operating TA

 >25 kV/μs common mode transient immunity

 Small footprint, low-profile SO-8 package

 Worldwide safety approval: UL/cUL, IEC/EN 62368-1

(Viorm = 567 Vpeak)

– Isolation voltage: 3 kVrms, 1 minute

Applications

 Low-power inverter current sensing

 eBikes

 Motor phase and rail current sensing

 Solar inverters

 Chargers and converters

 Switching power supplies