Worcester, Mass. The newest current sensor family from Allegro MicroSystems Inc., the ACS704, is the first SOIC8-packaged Hall-effect current sensor with the current path integrated into the package for greater sensitivity and accuracy, said the company.
The new sensor, available in both 15 A and 5 A versions, measures bi-directional ac or dc currents by using a Hall-effect magnetic field sensor to measure the field generated by the current flow. The company said because there is no electrical connection between the current path and sensing circuit, it provides a minimum of 800 volts of isolation without the use of additional components.
Measuring 1.7 mm high, the ACS704 provides a much smaller solution than other integrated current path Hall-effect sensors with comparable sensitivity. It also offers greater accuracy, sensitivity, and creepage and clearance distances than "trace-straddling" sensors, said the company.
The 1.5 mΩ resistance of the sensor provides extremely low power loss and voltage drop. The sensor operates from a single, 5-V supply, and the output is
ratiometric to the supply voltage. Accuracy at 25°C typically exceeds 1.5%. The sensor is compliant to lead-free directives.
Targeting industrial, consumer and automotive markets, applications include motor control and protection, small electric vehicles, battery monitoring and charge control, power distribution and monitoring, and personal UPS systems
This ACS704 family is priced at $1.61 in quantities up to 1,000. Delivery is eight to ten weeks.
Call (508) 853-5000