ACS711EX current sensor -31A do +31A - Pololu 2453

• Supply voltage of the logic part: 3.0 V to 5.5 V
• Measuring range: from - 31 A to 31 A
• Current consumption of the logic part: 4 mA
• Sensitivity for power supply of 3.3 V: 0,045 V/A
• Bandwidth: 100 kHz
• Operating temperature: -40 °C to 125 °C
• Module weight: 1 g (without connectors)
• Dimensions: 18 x 20.5 mm

The module consists of a printed circuit board made for the system Allegro  ACS711. The sensor operates based on the Hall effect. The chip can be powered from a voltage in the range: 3 V to 5.5 V.

• The chip is designed for current flowing in both directions (from -31A to 31A)
• The modulewithstands current surges up to 100 A for 100 ms
• Due to the low resistance of the system (0.6 mΩ) and channeling, the power losses are very small.
• Through the use of Hall effect, the current paths are isolated from the logic part.
• The bandwidth is 100 kHz
• The FAULT pin informsabout exceeding the range of 31 A
• Operating temperature: -40 °C to 125 °C

The sensor requires a supply voltage in the range from 3 V to 5.5 V, connected to the pins designated as VCC (+) and GND (ground). The output is a voltage signal proportional to the intensity of the measured current. When the voltage VCC is equal to 5 V, the output is centered on the half, that is 2.5 V. The output value increases by 45 mV at 1 A when the strength of the measured current is positive, otherwise, it decreases.

Formulae allowing to calculate the output values:

The FAULT pin is in the high status by default. It reaches a low status when the measured current exceeds the range of ±31 A. The only way to reset the FAULT flag is disconnecting and then re-connecting the power supply - VCC.

Attention!

The system is designed to work with voltages up to 30 V. Higher values can pernamently damage the module.

The module includes the passive components necessary for proper operation of the ACS711 sensor.

• The website of the manufacturer of Pololu #2453
• System documentation of ACS711