Broadcom ACHS-712x Series: Fully Integrated Hall Effect Linear Current Sensor ICs
The Broadcom ACHS-7121/7122/7123 product series represents a fully integrated, Hall Effect-based isolated linear current sensor family. Designed for accurate AC or DC current sensing, these devices are ideal for industrial, commercial, and communications systems. Each sensor features a precise, low-offset, linear Hall circuit integrated with a low-resistance copper conduction path (0.7 m typical) for efficient current sampling with minimal power loss. The output voltage is directly proportional to the applied current, offering a ratiometric output from the supply voltage. With a compact SO-8 package, these sensors meet worldwide regulatory safety standards and provide robust isolation (3 kVRMS).
Product Attributes
- Brand: Broadcom
- Technology: Hall Effect-based
- Isolation Voltage: 3 kVRMS
- Package: SO-8
- Certifications: UL, CSA
Technical Specifications
| Model | Current Range | Output Sensitivity (Typical) | Primary Conductor Resistance (Typical) | Operating Temperature Range | Supply Voltage | Bandwidth (Typical with 1 nF filter) | Total Output Error (Typical) | Common-Mode Transient Immunity (Typical) |
|---|---|---|---|---|---|---|---|---|
| ACHS-7121 | 10A | 185 mV/A | 0.7 m | 40C to 110C | 5.0V | 80 kHz | 1.5% | >25 kV/s |
| ACHS-7122 | 20A | 100 mV/A | 0.7 m | 40C to 110C | 5.0V | 80 kHz | 1.5% | >25 kV/s |
| ACHS-7123 | 30A | 66 mV/A | 0.7 m | 40C to 110C | 5.0V | 80 kHz | 1.5% | >25 kV/s |
Key Features
- Wide Operating Temperature: 40C to 110C
- Low primary conductor resistance: 0.7 m typ.
- Output voltage proportional to AC or DC currents
- Ratiometric output from supply voltage
- Single supply operation: 5.0V
- Low-noise analog signal path
- Factory-trimmed for accuracy
- Extremely stable output offset voltage
- Near zero magnetic hysteresis
- 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
2410010204_Broadcom-ACHS-7122-500E_C691912.pdf
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