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Sensors/MEMS??

3D magnetic sensor touts accurate sensing in three dimensions

Posted: 14 May 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Infineon? 3D magnetic sensor? I2C interface? consumer? industrial?

Infineon has uncloaked a 3D magnetic sensor TLV493D-A1B6 that flaunts highly accurate 3D sensing in the x, y and z directions, allowing the sensor to reliably measure 3D, linear and rotation movements. Offered in a small 6-pin TSOP package, the device features a digital I2C interface that allows fast and bidirectional communication between sensor and MCU.

The TLV493D-A1B6 suits consumer and industrial applications such as joysticks, control elements used in white goods such as multi-function knobs, and electric meters where the 3D magnetic sensor helps to protect against tampering.

TLV493D-A1B6

Using lateral hall plates for the z direction and vertical Hall plates for the x and y direction of the magnetic field, the sensor can be used in a large magnetic field range of 150mT for all three dimensions. This allows measuring and covering a long magnet movement. The large operation scale also makes the magnet circuit design easy, robust and flexible.

The IC provides 12bit data resolution for each measurement direction or 0.098mT per bit (LSB) so that even the smallest magnet movements can be measured. In "Power Down mode," the sensor only requires 7nanoampere of supply current.

To perform magnetic measurements, the sensor can be set in one of five different power modes. In "Ultra Low Power Mode," for example, the sensor performs a magnetic measurement every 100ms (10Hz) resulting in a current consumption of 10A.

The time between measurement cycles can be set flexibly allowing system specific solutions. Using the sensor with continuous measurements, the maximum power consumption is only 3.7mA. Also, the power modes can be changed during operation.

Engineering samples of the TLV493D-A1B6 are available as of July 2015 with volume production expected to start in January 2016.

- Julien Happich
??EE Times Europe





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