Overview
The Allegro™ ACS770LCB-050B-PFF-T is a high-precision linear current sensor IC from Allegro MicroSystems. This device is part of the ACS770 family, which provides economical and precise solutions for AC or DC current sensing. It features a monolithic Hall IC with a copper conduction path, offering high reliability and accuracy. The device is fully calibrated at the factory and includes proprietary digital temperature compensation technology to enhance accuracy and temperature stability.
Key Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | ICC | Output open | 10 | 15 | mA | |
| Primary Sampled Current | IP | -50 | 50 | A | ||
| Sensitivity | SensTA | Measured using full-scale IP, TA = 25°C | 39.04 | 40 | 40.96 | mV/A |
| Bandwidth | 120 kHz | |||||
| Output Rise Time | In response to step input current | 4.1 µs | ||||
| Internal Conductor Resistance | 100 µΩ |
Key Features
- Industry-leading total output accuracy with piecewise linear digital temperature compensation of offset and sensitivity.
- Industry-leading noise performance through proprietary amplifier and filter design techniques.
- High bandwidth operation with a typical bandwidth of 120 kHz and 4.1 µs output rise time in response to step input current.
- Integrated shield to reduce capacitive coupling and prevent offset drift in high-side, high-voltage applications.
- Galvanic isolation allowing use in high-side current sensing in high-voltage systems without opto-isolators.
- Single supply operation from 4.5 to 5.5 V.
- Output voltage proportional to AC or DC currents.
- Factory-trimmed for accuracy and extremely stable output offset voltage.
- Low power loss with 100 µΩ internal conductor resistance.
- Lead (Pb) free with 100% matte tin-plated leads and oxygen-free copper leadframe.
Applications
- Motor control and monitoring.
- Load detection and management.
- Power supply and DC-to-DC converter control.
- Inverter control.
- Overcurrent fault detection.
Q & A
- What is the primary function of the ACS770LCB-050B-PFF-T?
The primary function is to provide high-precision AC or DC current sensing.
- What is the typical bandwidth of the ACS770LCB-050B-PFF-T?
The typical bandwidth is 120 kHz.
- What is the output rise time in response to a step input current?
The output rise time is 4.1 µs.
- How does the integrated shield benefit the device?
The integrated shield reduces capacitive coupling and prevents offset drift in high-side, high-voltage applications.
- What is the internal conductor resistance of the device?
The internal conductor resistance is 100 µΩ.
- Is the device galvanically isolated?
Yes, the device provides galvanic isolation, allowing use in high-side current sensing in high-voltage systems.
- What is the supply voltage range for the ACS770LCB-050B-PFF-T?
The supply voltage range is from 4.5 to 5.5 V.
- Is the device lead (Pb) free?
Yes, the device is lead (Pb) free with 100% matte tin-plated leads and an oxygen-free copper leadframe.
- What are some typical applications of the ACS770LCB-050B-PFF-T?
Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection.
- Is the device fully calibrated at the factory?
Yes, the device is fully calibrated prior to shipment from the factory.
