TI introduces industry's first fully integrated fluxgate sensor, signal conditioning and compensation coil driver IC, providing closed-loop current sensing

07/02/2015

Texas Instruments introduced the industry's first magnetic sensing integrated circuit (IC) with a fully integrated fluxgate sensor and compensation coil driver, along with all the required signal conditioning circuitry. Complete integration enables the DRV421 to provide best-in-class sensor accuracy and linearity, high dynamic range, and simpler system design compared to traditional closed-loop sensors. With the DRV421, system designers will be able to more easily develop magnetic closed-loop current sensors for applications such as motor control, renewable energy, battery chargers and power monitoring.

Key benefits of the DRV421 IC

• Simplifies system design: An integrated fluxgate sensor reduces design complexity and design effort, and helps achieve smaller footprint.
• Sensor integration enables best-in-class accuracy and linearity:
• Allows precise control over motors and automation equipment with an overall sensor accuracy of less than 0.1 percent.
• Reduces coupling between the compensation coil and the fluxgate sensor, as well as emissions from fluxgate excitation, to provide high linearity
• High dynamic range: Built-in closed-loop magnetic core degaussing procedure and offset calibration increase dynamic range up to six decades while supporting higher system-level accuracy, compared to traditional solutions.
• Allows 3.3-V operation: As the first fluxgate sensor solution on the market supporting 3.3-V operation, the DRV421 simplifies the interface to integrated ADCs on low-power microcontrollers.

Find more details on Texas Instruments web site