Board Mount Current Sensors For New Designs Use ACS772/3

ACS770LCB-100B-PFF-T – 100A Hall Effect Current Sensor – Allegro MicroSystems

Precisely monitor AC/DC currents up to 100A with the ACS770LCB-100B-PFF-T Hall Effect current sensor from Allegro MicroSystems. Designed for robust industrial applications, this through-hole sensor delivers ±0.6% accuracy with ratiometric voltage output and operates across extreme temperatures. PCX ensures genuine Allegro components with reliable stock and expedited shipping.

Key Features

• Current Range: Bidirectional sensing up to ±100A
• High Accuracy: ±0.6% error tolerance at 25°C
• Output Signal: Ratiometric voltage (20mV/A sensitivity)
• Wide Bandwidth: DC to 120kHz frequency response
• Ultra-Fast Response: 4.6µs reaction time
• Low Power: 15mA max supply current at 5V operation
• Robust Design: Operates from -40°C to +150°C

Technical Specifications

This open-loop Hall Effect sensor features a single-channel design in a 5-CB Module package (PFF form factor). Its through-hole mounting ensures secure PCB integration, while bidirectional polarization accommodates both positive and negative current flows. The ratiometric voltage output minimizes error by scaling with supply voltage, and ±1% linearity guarantees consistent performance across the full measurement range. Download full datasheet.

Typical Applications

• Motor control systems in industrial automation
• Overcurrent protection circuits
• Battery management systems (BMS)
• Power supply load monitoring
• Energy metering equipment

About Allegro MicroSystems

Allegro MicroSystems is a global leader in power and sensing semiconductor solutions, renowned for innovation in Hall Effect technology. With over 30 years of industry expertise, Allegro designs integrated circuits that meet rigorous automotive and industrial standards, prioritizing precision and reliability in high-stress environments.

The company’s current sensor portfolio, including the ACS770 series, reflects Allegro’s commitment to signal integrity and thermal stability. Their vertically integrated manufacturing process ensures consistent quality control, making Allegro sensors the preferred choice for mission-critical applications worldwide.

About Current Sensors

Current sensors are essential components for real-time electrical load monitoring and system protection. By converting current flow into measurable voltage signals, they enable precise control in power electronics while preventing equipment damage from overloads or short circuits. Hall Effect sensors like the ACS770 series offer non-intrusive measurement without shunt resistors, minimizing power loss.

Modern applications demand sensors with high bandwidth, low noise, and temperature resilience. Open-loop designs balance cost and performance for industrial use, providing galvanic isolation that enhances safety in high-voltage systems. Selecting the right current sensor directly impacts system efficiency, safety compliance, and operational longevity.

Packaging

Available in protective Tube packaging for secure handling and assembly line compatibility.

Frequently Asked Questions

Q: What does “ratiometric output” mean for this current sensor?
A: The output voltage scales proportionally with the supply voltage (e.g., 5V input), improving measurement consistency despite power fluctuations.

Q: Can this sensor measure both AC and DC currents?
A: Yes, its DC~120kHz bandwidth supports both AC and DC current measurement up to ±100A.

Q: Is external calibration required?
A: No, factory-calibrated sensitivity and quiescent output ensure ±0.6% accuracy without user adjustments.

Q: How does bidirectional polarization work?
A: It detects current flow in both directions (positive/negative), with 0A typically corresponding to half the supply voltage (e.g., 2.5V at 5V VCC).

Q: What isolation features does it provide?
A: The Hall Effect principle creates inherent galvanic isolation between current paths and measurement circuits.

Q: Why choose Hall Effect over shunt resistors?
A: Hall sensors eliminate resistive power losses, handle higher currents without heating, and provide inherent voltage isolation.

Note: Product image is representational; refer to datasheet for exact dimensions.

Ready to Integrate Precision Current Sensing?

PCX guarantees authentic Allegro MicroSystems components with same-day shipping. Order ACS770LCB-100B-PFF-T today for reliable stock and expert technical support!