Infineon – 3D Magnetic Sensor TLV493D-A1B6
Reduces Power Consumption in Consumer and Industrial Applications
The TLV493D-A1B6 marks the starting point for a new 3D magnetic sensor family.
The TLV493D-A1B6 suits consumer and industrial applications that require accurate three-dimensional measurements or angular measurements or low power consumption, such as joysticks; control elements used for white goods and multi-function knobs; and electric meters where the 3D magnetic sensor helps to protect against tampering. With its contactless position sensing and high temperature stability of magnetic threshold, the TLV493D-A1B6 enables these systems to become smaller, more accurate and robust.
Technical details of TLV493D-A1B6
The 3D sensor TLV493D-A1B6 detects all three dimensions of a magnetic field. 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 (milli Tesla) 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 TLV493D-A1B6 provides 12-bit data resolution for each measurement direction. This allows a high data resolution of 0.098mT per bit (LSB) so that even the smallest magnet movements can be measured.
One of the main development goals for the TLV493D-A1B6 sensor was low power consumption. In “Power Down mode,” the sensor only requires 7 nano Ampere 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 100 milliseconds (10Hz) resulting in a current consumption of 10µAmpere. 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 3.7mAmpere. Also, the power modes can be changed during operation.
The TLV493D-A1B6 uses a standard I²C digital protocol to communicate with external microcontrollers. It is possible to operate the sensors in a bus mode to eliminate additional wiring cost and efforts.
Targeting industrial and consumer applications, TLV493D-A1B6 can be operated on supply voltages between 2.7 Volt and 3.5 Volt and in a temperature range between -40°C to 125°C. The product is qualified according to industry norm JESD47.
The evaluation board “3D Magnetic 2Go”
Engineering samples of the TLV493D-A1B6