Product Description
KMX62 is a 6 Degrees-of-Freedom inertial sensor system that
features 16-bit digital outputs accessed through I2C communication.
The KMX62 sensor consists of a tri-axial magnetometer plus a triaxial accelerometer coupled with an ASIC. It is packaged in a 3 x 3 x
0.9 mm Land Grid Array (LGA) package. The ASIC is realized in
standard 0.18µm CMOS technology and features flexible user
programmable ±2g / ±4g / ±8g / ±16g full scale range for the
accelerometer and ±1200µT full scale range for the magnetometer.
Accelerometer and Magnetometer data can be accumulated in an
internal 384-byte FIFO buffer and transmitted to the application
processor.
Acceleration sensing is based on the principle of a differential capacitance arising from accelerationinduced motion of the sense element, which utilizes common mode cancellation to decrease errors
from process variation, temperature, and environmental stress. Capacitance changes are amplified and
converted into digital signals which are processed by a dedicated digital signal processing unit. The
digital signal processor applies filtering, bias, and sensitivity adjustments, as well as temperature
compensation.
Magnetic sensing is based on the principle of magnetic impedance. The magnetic sensor detects very
small magnetic fields by passing an electric pulse through a special electron spin aligned amorphous
wire. Due to the high Curie temperature of the wire, the sensor’s thermal performance shows excellent
stability.
Noise performance is excellent with bias stability over temperature. Bias errors resulting from assembly
can be trimmed digitally by the user. These sensors can accept supply voltages between 1.7V and
3.6V, and digital communication voltages between 1.2V and 3.6V.