Allegro MicroSystems ACS39402 TMR Current Sensor
Allegro Microsystems ACS39402 TMR Current Sensor is a self-contained, single-package current-sensing solution that requires no external sense resistor. This small TMR-based sensor is designed for cost-optimized and space-constrained applications. The ACS39402 sensor offers a high operating bandwidth for fast control loops or for monitoring high-speed currents. The current conductor in the sensor offers low resistance, making it ideal for low-power dissipation constraints and enabling high-side current sensing without additional isolation techniques. This AEC-Q100 grade 1, automotive-qualified current sensor features a 500kHz bandwidth for fast response time and a wide operating temperature range from -40°C to 125°C.
Features
- AEC-Q100 Grade 1, automotive qualified
- Self-contained single-package current-sensing solution
- Robust differential sensing against the external magnetic field
- Small footprint, wide body 5-pin SOT23-W package
- 500kHz bandwidth for fast response time
- 1.6mΩ low primary conductor resistance
- Ratiometric operation unidirectional current sensing
Specifications
- 500kHz bandwidth for fast response time
- 3V to 5.5V operating supply voltage
- 1µs typical response time
- -40°C to 125°C wide operating temperature range
- High performance for optimized energy applications:
- ±2.8% sensitivity error
- ±30mV maximum offset voltage (25°C)
- Ratiometric operation from 3V to 5.5V supply
Applications
- Industrial motor control
- Residential micro/string solar inverter
- Robotics
- DC-DC converter
Functional Block Diagram
Publicado: 2026-03-24
| Actualizado: 2026-04-17