Measuring Current in i.MX Applications Case Study based on ACS723LLCTR-10AU-T Sensor Board

Measuring Current in i.MX Applications Case Study based on ACS723LLCTR-10AU-T Sensor Board. The sensor board connects to the target board via JP1. Polarity is important because the part number ACS723LLCTR-10AU-T specifies a unidirectional 0-10A DC current sensor. FET Q1 is used to short the pins of JP1, allowing the ACS723 to be taken out of the measurement loop. FET Q2 is used to take one leg of the ACS723 out of the measurement loop so that calibration of the sensor may be performed immediately before making a measurement to minimize temperature effects on the sensor