by Mat Dirjish

MultiDimension Technology (MDT), a supplier of magnetic sensors and developer of tunneling magnetoresistance (TMR) technology, introduce the TMR1228D dual-axis bipolar latch magnetic switch IC. The device delivers always-on magnetic field detection, a ±5 Gauss sensitivity, microamp-level power consumption, dual-axis sensing, and a high-frequency response. Target applications include smart utility metering, industrial position sensing, speed detection, and motion-control applications.

The TMR1228D integrates TMR sensing elements with CMOS signal-conditioning circuitry to convert changing magnetic fields into digital output signals. In contrast to conventional Hall-effect switches relying on duty-cycle operation to reduce power consumption, the TMR1228D achieves continuous magnetic field detection while consuming as little as 1.5 μA per axis. Reportedly, this eliminates missed detection events caused by intermittent sampling, delivering faster response and higher reliability for always-on sensing applications.

The device integrates independent X- and Y-axis sensing channels with separate outputs, supporting quadrature A/B signals for rotary and linear position, speed, and direction detection. This allegedly simplifies the design of motion sensing systems while providing flexibility for multi-axis magnetic detection. Pertinent features include:

• Dual-axis X/Y magnetic sensing with independent outputs.
• ±5 Gauss operating and release points for smaller magnets and wider air-gaps.
• Continuous (always-on) magnetic field detection without duty-cycling.
• Current consumption of 1.5 μA per axis.
• Frequency response from dc to 1 kHz.
• Industry-standard quadrature A/B outputs for rotary and linear position, speed, and direction sensing.
• 1.8V to 5.5V operating voltage.
• Operating temperature range from -40°C to +125°C.
• DFN8L package measuring 3 mm x 3 mm x 0,75 3×3×0.75mm.

For deeper details, procure and peruse the TMR1228D datasheet.

| info@matdirjish.com |