SparkFun Current Sensor Breakout - ACS723
SEN-13679 ROHS
The SparkFun Current Sensor Breakout is a high accuracy board that utilizes the ACS723 for
moderate AC and DC current sensing applications. The ACS723 sensor uses a Hall effect sensor to
output a voltage relative to the current flowing through the IP+ and IP- pins on the board. The
advantage of using a Hall effect sensor, specifically, is that the circuit being sensed and the circuit
reading the sensor are electrically isolated meaning that, although your Arduino is running on 5V, the
sensed circuit can be operating at higher DC or AC voltages!
The SparkFun Current Sensor Breakout measures both DC and AC currents all the way up to 5A,
has full electrical isolation of measured and sensed circuits, and has a base sensitivity of 400mV/A.
Although the analog output is adjustable to 80kHz, the bandwidth on the ACS723 Sensor Breakout
width filter has been set to 20kHz to reduce noise when using at high gains. The full 80KHz
bandwidth that the sensor is capable of can be recovered by closing the JP1 (Bandwidth Select)
jumper on the back of the board.
Note: Although the chip itself is rated for up to 2.4kV (RMS) of isolation, the board has not been
designed for such high voltage applications.
