Summary of ACHS-719X LINEAR CURRENT SENSOR ICS
Broadcom's ACHS-719x are fully integrated Hall-effect isolated linear current sensor ICs (±10 A to ±50 A) in a compact SO-8 surface-mount package. They use an internal copper conduction path and differential chopper-stabilized CMOS Hall sensors to produce a ratiometric, low-noise voltage proportional to AC or DC current, with factory trimming for accuracy, wide temperature range, low internal resistance (0.7 mΩ), and worldwide safety approvals.
Parts used in the ACHS-719x Current Sensor Project:
- Broadcom ACHS-719x Hall-effect isolated linear current sensor IC (SO-8 package)
- Supply voltage: 5.0 V single supply (power source)
- Filter capacitor (example values: 1 nF for ~80 kHz bandwidth)
- PCB with appropriate SO-8 footprint and copper traces for primary conduction path connections (pins 1–4)
- Signal routing to output and FILTER pin (pins 5–8)
- Decoupling capacitors for power supply stability
- Solder and standard surface-mount assembly materials
- Protective components or layout to meet UL/cUL and IEC/EN 62368-1 safety requirements
Broadcom’s ACHS-719x sensor ICs have a compact, surface mountable, SO-8 package that meets worldwide regulatory safety standards
The Broadcom ACHS-719x (±10 A to ±50 A) 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, 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: -40°C to +110°C
- Internal conductor resistance: 0.7 mΩ typ.
- Sensing current range: ±10 A ~ ±50 A
- 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: 5.0 V
- Low-noise analog signal path
- Device bandwidth set via the 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)
Read more: ACHS-719X LINEAR CURRENT SENSOR ICS
- What current range do ACHS-719x sensors support?
They support sensing currents from ±10 A to ±50 A. - Can ACHS-719x sense AC and DC currents?
Yes, the output voltage is proportional to both AC and DC currents. - What supply voltage do ACHS-719x devices require?
They operate from a single 5.0 V supply. - How is the device bandwidth set?
The bandwidth is set via the FILTER pin using a filter capacitor; 1 nF yields about 80 kHz typical bandwidth. - What is the internal conductor resistance?
The internal conduction path has a typical resistance of 0.7 mΩ. - What output sensitivity ranges are available?
Output sensitivity ranges from 40 mV/A to 185 mV/A. - Are ACHS-719x devices factory calibrated for accuracy?
Yes, they are factory-trimmed for accuracy and have extremely stable output offset voltage. - What temperature range can ACHS-719x operate in?
They operate from -40°C to +110°C. - Do ACHS-719x devices have safety approvals?
Yes, they have worldwide safety approval including UL/cUL and IEC/EN 62368-1. - How much common mode transient immunity do they provide?
They offer greater than 25 kV/µs common mode transient immunity.
