ACS711 Current Sensor Carrier -12.5 to +12.5A

₪52

תיאור

ACS711 Current Sensor Carrier -12.5 to +12.5A

This current sensor is a carrier board or breakout board for Allegro’s ACS711KLCTR-12AB-T
Hall effect-based linear current sensor with overcurrent fault output;
we therefore recommend careful reading of the ACS711 datasheet
(489k pdf)
before using this product.
The sensor has an operating voltage of 3 – 5.5V and an output sensitivity of 110mV/A when Vcc is 3.3V
(or 167mV/A when Vcc is 5V).

Using the sensor

The sensor requires a supply voltage of 3 – 5.5V to be connected across the Vcc and GND pads,
which are labeled on the bottom silkscreen. The sensor outputs an analog voltage that is linearly proportional to the input current.
The quiescent output voltage is Vcc/2 and changes by 110mV per amp of input current (when Vcc=3.3V),
with positive current increasing the output voltage and negative current decreasing the output voltage.
For an arbitrary input current i (in amps), the sensor’s output voltage can be more generally represented as:

VOUT = (0.11V/A * i + 1.65V) * Vcc / 3.3V

The FAULT pin is normally high and latches low when the
current exceeds ±12.5A. Once the FAULT pin is latched low, the only way to reset it is by toggling power on the Vcc pin.

The pads are labeled on the bottom silkscreen, as shown in the picture to the right.
The silkscreen also shows the direction that is interpreted as positive current flow via the +i arrow.

This 12.5A current sensor is marked with a purple X. We also sell a 25A version that uses the same carrier PCB;
you can distinguish the versions by reading the text on the IC or by looking at the color of the X on the bottom silkscreen.

מפרט

Designed for bidirectional input current from -12.5 to 12.5A (though the robust sensor IC can survive up to five times the overcurrent condition).
Conductive path internal resistance is typically 1.2mΩ, and the PCB is made with 2-oz copper, so very little power is lost in the board.
Use of a Hall effect sensor means the IC is able to electrically isolate the current path from the sensor’s electronics (for applications up to 100V), which allows the sensor to be inserted anywhere along the current path and to be used in applications that require electrical isolation.
100kHz bandwith.
Good accuracy and reliability: factory calibration results in a typical total output error of ±5% at room temperature, the output offset voltage is extremely stable, and the sensor has zero magnetic hysteresis.
Overcurrent FAULT output latches low when current magnitude exceeds 12.5A.
Operating temperature range of -40°C to 125°C.