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.