Overview
The Allegro ACS712ELCTR-30A-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 environments. The ACS712 is packaged in a small, surface mount SOIC8 package, facilitating easy implementation by customers. It is not intended for automotive applications.
Key Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | ICC | VCC = 5.0 V, output open | 10 | 13 | mA | |
| Current Sensing Range | IP | -30 | 30 | A | ||
| Sensitivity | Sens | Over full range of IP, TA = 25°C | 64 | 66 | 68 | mV/A |
| Output Current Source | IIOUT(Source) | 3 | mA | |||
| Output Current Sink | IIOUT(Sink) | 10 | mA | |||
| Overcurrent Transient Tolerance | IP | 1 pulse, 100 ms | 100 | A | ||
| Operating Ambient Temperature | TA | -40 | 85 | °C | ||
| Maximum Junction Temperature | TJ(max) | 165 | °C | |||
| Storage Temperature | Tstg | -65 | 170 | °C |
Key Features
- Hall-Effect Technology: The ACS712 uses a precise, low-offset, linear Hall circuit to convert the magnetic field generated by the current into a proportional voltage output.
- Electrical Isolation: The device offers 2.1 kVRMS voltage isolation between the current conductor and the signal leads, eliminating the need for opto-isolators or other costly isolation techniques.
- Low-Resistance Current Conductor: The copper conduction path has a low resistance, making it suitable for high-current applications.
- Wide Operating Temperature Range: The device operates over a temperature range of -40°C to 85°C, making it versatile for various environments.
- High Accuracy and Linearity: The ACS712 provides high accuracy and linearity over the full range of the current sensing, with a total output error of ±1.5% at 25°C.
- Overcurrent Protection: The device can tolerate overcurrent conditions up to 5 times the nominal current for short durations.
Applications
- Motor Control: Monitoring and controlling motor currents in industrial and commercial systems.
- Load Detection and Management: Detecting and managing loads in various power systems.
- Switched-Mode Power Supplies: Current sensing in switched-mode power supplies for efficient operation.
- Overcurrent Fault Protection: Detecting and protecting against overcurrent conditions in power systems.
Q & A
- What is the current sensing range of the ACS712ELCTR-30A-T?
The current sensing range is ±30 A.
- What is the typical sensitivity of the ACS712ELCTR-30A-T?
The typical sensitivity is 66 mV/A.
- What is the operating supply voltage range for the ACS712ELCTR-30A-T?
The operating supply voltage range is 4.5 V to 5.5 V.
- What is the maximum junction temperature for the ACS712ELCTR-30A-T?
The maximum junction temperature is 165°C.
- Does the ACS712ELCTR-30A-T provide electrical isolation?
Yes, it provides 2.1 kVRMS voltage isolation between the current conductor and the signal leads.
- What is the storage temperature range for the ACS712ELCTR-30A-T?
The storage temperature range is -65°C to 170°C.
- Can the ACS712ELCTR-30A-T be used in automotive applications?
No, it is not intended for automotive applications.
- What is the output current source and sink capability of the ACS712ELCTR-30A-T?
The output current source is 3 mA, and the output current sink is 10 mA.
- How does the ACS712ELCTR-30A-T handle overcurrent conditions?
The device can tolerate overcurrent conditions up to 5 times the nominal current for short durations.
- What is the typical operating supply current of the ACS712ELCTR-30A-T?
The typical operating supply current is 10 mA.
