Allegro just rolled out what it claims is the first digital current sensor that targets power monitoring, servers, and telecom apps that need digital current sensing and reporting through an I2C bus.
The company's factory programs offset and gain, including temperature coefficients for stabilization, over an operating temperature range to reduce total error. In addition, Allegro integrated a low resistance conductor, eliminating external shunt resistors. Hall-effect sensing is used, eliminating errors caused by changing sense resistance based on temperature.
The ACS764 sensor IC allows for 16 unique I2C bus addresses that are selectable via external pins and full scale 16 A and 32 A unidirectional sensing that comes as standard options. There’s also a digital over-current fault output and internal averaging filter that are user configurable. Multiple sensor readings can be obtained with the same time stamp given the IC’s digital synchronization input pin.
The precision digital sensor is designed for applications that operate at less than 100V and are housed in a 24-pin QSOP package. The pre-programmed and highly integrated device is designed to speed design time and save money for industrial designs.
— Carolyn Mathas is a freelance blogger and editor for EE Times' Industrial Control Designline