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Specifications
SKU: 1902964
Fully Integrated, Hall Effect-Based Linear Current Sensor with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor
| Parameter | Symbol | Min | Typ | Max | Unit | Description |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V | Operating supply voltage range |
| Output Quiescent Voltage | VQ | 2.4 | 2.5 | 2.6 | V | Output voltage when no current is present (0A) |
| Sensitivity | S | 185 | 195 | 205 | mV/A | Change in output voltage per ampere of sensed current (for 5A version) |
| Bandwidth | BW | - | 80 | - | kHz | Frequency at which the output signal is reduced to 70.7% of its original value |
| Output Rise Time | tR | - | 3 | - | μs | Time required for the output to rise from 10% to 90% of its final value |
| Output Fall Time | tF | - | 3 | - | μs | Time required for the output to fall from 90% to 10% of its final value |
| Isolation Voltage | VISOL | 2.2 | - | - | kV | Maximum voltage that can be applied between the primary and secondary circuits |
| Operating Temperature | Toper | -40 | - | 85 | °C | Range of temperatures over which the device can operate safely |
| Storage Temperature | Tstg | -55 | - | 150 | °C | Range of temperatures over which the device can be stored safely |
Instructions for Using the ACS712 Current Sensor:
Power Supply:
- Connect the VCC pin to a 5V power supply.
- Connect the GND pin to the ground of your power supply.
Output Signal:
- The output pin (Vo) provides an analog voltage proportional to the sensed current.
- For a 5A version, the sensitivity is typically 185 mV/A, meaning a 1A current will produce an output voltage change of 185 mV.
Zero Current Offset:
- When no current is flowing through the sensor, the output voltage should be around 2.5V (VQ).
- If the output is not exactly 2.5V, you may need to calibrate the offset in your application.
Current Sensing:
- Connect the current-carrying wire through the center hole of the sensor module.
- Ensure the current direction matches the arrow on the sensor module for correct polarity.
Reading the Output:
- Use an analog-to-digital converter (ADC) to read the output voltage.
- Convert the ADC reading to current using the sensitivity value (e.g., 185 mV/A).
Filtering and Signal Conditioning:
- The sensor has a bandwidth of 80 kHz, but you may need to add external filtering if your application requires lower noise or a narrower bandwidth.
Isolation:
- The sensor provides galvanic isolation up to 2.2 kV, ensuring safety and preventing interference between the high-voltage side and the low-voltage side.
Temperature Considerations:
- Ensure the operating temperature is within the specified range (-40°C to 85°C) for reliable performance.
- Store the sensor in a temperature range of -55°C to 150°C.
Handling and Installation:
- Handle the sensor with care to avoid damaging the internal components.
- Mount the sensor in a location where it is not exposed to excessive mechanical stress or vibration.
Testing:
- Test the sensor by applying known currents and verifying the output voltage to ensure it meets the expected specifications.
Inquiry - ACS712
