ACS37800KMACTR-090B3-I2C Isolated Power Monitoring IC｜90A I²C Current Sensor

Is your product a high-current, high-voltage system? Does it face issues like overheating, lack of isolation, low efficiency, or even bulky and complex design? The ACS37800 delivers secure isolation, digital current and power monitoring, and streamlines system design.

What is ACS37800KMACTR-090B3-I2C?

Introduction to ACS37800KMACTR-090B3-I2C

The ACS37800KMACTR-090B3-I2C is a SOIC-16 packaged isolated digital power and current monitoring IC. It measures current using the Hall effect and outputs data via a digital I²C interface.

The Main Features of ACS37800KMACTR-090B3-I2C

1. Current and power monitoring: Provides high-precision current measurement (up to approximately 90A) and power measurement.
2. Digital output (I²C): Communicates with microcontrollers or main control systems via the I²C protocol
3. Electrical isolation: Provides electrical isolation between the detection channel and the logic side, suitable for high-voltage application environments
4. Wide operating temperature range: Typical operating temperature -40 °C to +125 °C
5. Overcurrent / fault indication: Supports configurable overcurrent detection and fault status output pins
6. Zero-crossing detection function: Supports current / voltage zero-crossing detection, suitable for AC measurement applications

Absolute maximum ratings

The Working Principle of ACS37800KMACTR-090B3-I2C

The ACS37800 incorporates an integrated copper conductive path that generates a magnetic field proportional to the current. This field is detected through differential sensing, effectively suppressing measurement errors caused by common-mode interference.

ACS37800 employs Allegro Hall effect isolation current detection technology, delivering enhanced isolation performance within compact PCB dimensions.

The ACS37800 power monitoring IC delivers multiple critical power measurement parameters, easily readable via SPI or I²C digital interfaces. In I²C mode, it also features dedicated configurable I/O pins for zero-crossing voltage/current detection, undervoltage/overvoltage status indication, and rapid overcurrent fault detection.

In what scenarios would the ACS37800KMACTR-090B3-I2C be used?

When is ACS37800 "required" to be used?

The ACS37800 is ideal when the system meets 2-3 of the following conditions simultaneously:

• 1. The measured current is large
• Typical: 10A – 90A (even higher during transient)
• Not suitable for using shunt resistors (high power consumption, overheating, reduced accuracy)
• 2. Electrical isolation is required
• High-voltage AC/DC system
• The MCU / control board is on the low-voltage side
• It needs to comply with UL/IEC/industrial or energy-related safety regulations
• 3. Direct "digital output" to reduce the burden on the MCU
• The MCU ADC resources are tight
• Want to directly read current / voltage / power / energy

Typical applications of ACS3780

1. Power electronics: Current detection in motor drivers, inverters, and power systems
2. Energy monitoring: Smart meters, power management and energy consumption monitoring systems
3. Industrial automation: Current monitoring applications with protection and diagnostic functions
4. High-voltage systems: Safe and reliable current measurement through built-in isolation

Why choose ACS37800?

Different plans and issues

The differences from ACS712 / ACS758

Common FAQs about ACS37800KMACTR-090B3-I2C

• What is the maximum current that the common FAQ of ACS37800KMACTR-090B3-I2C can measure?
• The rated current is approximately ±90A, suitable for medium to large power systems.
• Is a shunt resistor required?
• No, it is internally integrated with copper conductive paths.
• What can this digital output read?
• Current, voltage, power, energy, status/fault indicators