Overview
The ACS37800KMACTR-090B3-I2C is an isolated power monitoring IC designed for accurate measurement of AC or DC current, voltage, and power in compact, high-voltage systems. It integrates a Hall-effect based current sensor and voltage sensing front-end in a single package, providing reinforced galvanic isolation between the primary high-voltage domain and the low-voltage control interface. With I2C digital output, factory-calibrated accuracy, and wide operating temperature support, the device simplifies power monitoring in energy metering, industrial power supplies, and smart appliances.
Core Parameters
| Parameter | Specification |
|---|---|
| Measured Quantities | Current, Voltage, Power |
| Current Sensing Method | Integrated Hall-effect sensor |
| Nominal Current Range | ±90 A (variant dependent) |
| Voltage Measurement Range | Up to 600 V |
| Isolation Rating | Reinforced isolation |
| Interface | I2C |
| Supply Voltage | 3.0 V to 3.6 V |
| Total Measurement Error | ±1% typical |
| Bandwidth | 120 kHz |
| Response Time | 5 µs typical |
| Operating Temperature | –40°C to +125°C |
| Package | SOIC-16, wide body |
Features
- Integrated current and voltage sensing in a single isolated IC
- ±90 A nominal current range, optimized for high-power applications
- High-voltage measurement capability up to 600 V
- Reinforced galvanic isolation between primary and secondary domains
- I2C digital interface for easy MCU integration
- Factory-calibrated output, minimizing system-level calibration effort
- Fast response time (≈5 µs) suitable for dynamic load monitoring
- Wide operating temperature range for industrial environments
- Compact SOIC-16 wide-body package reducing BOM and PCB area
Typical Application Scenarios
| Application | Why ACS37800KMACTR-090B3-I2C Fits |
|---|---|
| Energy Metering | Accurate current, voltage, and power measurement with isolation |
| Industrial Power Supplies | High-voltage monitoring with reinforced isolation |
| Smart Appliances | Integrated sensing simplifies power consumption tracking |
| EV Chargers & Power Distribution | Supports high current and high voltage domains safely |
| Solar Inverters & UPS Systems | Fast response and wide bandwidth for real-time power monitoring |
| Motor Drives | Isolated sensing improves safety and noise immunity |
Performance Comparison
| Feature | ACS37800KMACTR-090B3-I2C | Discrete Sensor + ADC | Non-Isolated Monitor |
|---|---|---|---|
| Isolation | Reinforced | External required | None |
| Current Measurement | Integrated ±90 A | External shunt / sensor | Limited |
| Voltage Measurement | Up to 600 V | External divider | Low voltage only |
| Interface | I2C | MCU ADC | I2C / SPI |
| Calibration | Factory calibrated | System-level | Partial |
| PCB Area | Low | High | Low |
The ACS37800 significantly reduces system complexity while improving safety and measurement accuracy compared to discrete or non-isolated solutions.
Conclusion
The ACS37800KMACTR-090B3-I2C delivers a highly integrated and isolated solution for power monitoring in high-voltage, high-current systems. By combining Hall-effect current sensing, voltage measurement, and digital I2C output in one package, it reduces design complexity, improves safety, and accelerates time-to-market. Its accuracy, fast response, and wide operating temperature range make it well suited for industrial, energy, and smart power applications.
Manufacturer Profile
The ACS37800KMACTR-090B3-I2C is manufactured by Allegro MicroSystems, a company well known for its expertise in magnetic sensing and power monitoring technologies. Allegro’s isolated current and power sensor solutions are widely used in industrial, automotive, and energy systems where accuracy, safety, and reliability are critical.
For more information and to review our available inventory, please contact our team for detailed pricing, current stock levels, and any additional technical support you may need.
View more BLOGS you may be interested as below: