SparkFun Current Sensor Breakout - ACS723 - Moderate AC and DC Current Sensing Applications - Base Sensitivity of 400mV/A - Full Electrical Isolation

The SparkFun Current Sensor Breakout - ACS723 seems to have mixed reviews from customers. One customer had intended to use it for a custom linear power supply but found that it did not meet their needs. They were expecting the sensor to provide a higher resolution for measuring current using an Arduino analogRead() function. However, the voltage output of the sensor did not scale linearly with the amperage, resulting in a lower resolution than desired. The customer also noted that this limitation was not mentioned in the datasheet. As a result, they returned the product and ended up using a different current meter. On the other hand, another customer had a positive experience with the product. They found that the current sensors worked well with low noise and were able to accurately measure current through a stepper motor winding. In terms of delivery, SparkFun delivered the product on time with no problems. The price of the product was also Considered to be good. Overall, it appears that the SparkFun Current Sensor Breakout - ACS723 may work well for some specific applications, but it may not meet the needs of users looking for higher resolution measurements in low amperage DC applications.