Overview
The Allegro™ ACS712ELCTR-20A-T is a fully integrated, hall-effect-based linear current sensor IC designed by Allegro MicroSystems. This device provides economical and precise solutions for AC or DC current sensing in various systems, including industrial, commercial, and communications applications. It features a low-resistance current conductor and is packaged in an 8-pin SOIC, making it easy to implement in customer designs. The ACS712ELCTR-20A-T is not intended for automotive applications.
Key Specifications
| Characteristic | Value | Units |
|---|---|---|
| Current Sensing Range | ±20 | A |
| Supply Voltage Range | 4.5 to 5.5 | V |
| Primary Conductor Resistance | 1.20 | mΩ (typ, TA = 25°C) |
| Frequency Bandwidth | 80 kHz (typ, -3dB, TA = 25°C, IP = 10 A peak-to-peak) | |
| Output Rise Time | 5 µs (typ, response to step input current) | |
| Supply Current | 10 to 13 | mA (VCC = 5.0 V, output open) |
| Operating Temperature Range | -40 to 85 | °C |
| Maximum Junction Temperature | 165 | °C |
| Storage Temperature Range | -65 to 170 | °C |
Key Features
- Low-noise analog signal path with a frequency bandwidth of 80 kHz.
- Extremely stable output offset voltage with nearly zero magnetic hysteresis.
- Ratiometric output from the supply voltage.
- Output voltage proportional to AC or DC currents, factory-trimmed for accuracy.
- Low primary conductor resistance of 1.20 mΩ (typical at 25°C).
- Electrical isolation between the conductive path and signal leads.
- Filter pin to set the device bandwidth.
Applications
- Motor control and monitoring.
- Load detection and management.
- Switch-mode power supplies.
- Overcurrent fault protection.
Q & A
- What is the current sensing range of the ACS712ELCTR-20A-T?
The current sensing range is ±20 A. - What is the supply voltage range for this device?
The supply voltage range is from 4.5 to 5.5 V. - What is the primary conductor resistance of the ACS712ELCTR-20A-T?
The primary conductor resistance is 1.20 mΩ (typical at 25°C). - What is the frequency bandwidth of the device?
The frequency bandwidth is 80 kHz (typical, -3dB, TA = 25°C, IP = 10 A peak-to-peak). - What is the output rise time of the ACS712ELCTR-20A-T?
The output rise time is 5 µs (typical, response to step input current). - Is the ACS712ELCTR-20A-T suitable for automotive applications?
No, it is not intended for automotive applications. - What is the operating temperature range of the device?
The operating temperature range is from -40 to 85°C. - How is the output voltage of the ACS712ELCTR-20A-T related to the supply voltage?
The output voltage is ratiometric from the supply voltage. - What kind of isolation does the ACS712ELCTR-20A-T provide?
The device provides electrical isolation between the conductive path and signal leads. - How can the device bandwidth be adjusted?
The device bandwidth can be set via the new FILTER pin.
