RD4247MAG3110 Freescale Semiconductor, RD4247MAG3110 Datasheet - Page 11

• Manufacturer Part Number: RD4247MAG3110
• Description: DEV KIT MAG3110 LFSTBUSB
• Manufacturer: Freescale Semiconductor
• Series: -r

Specifications of RD4247MAG3110

• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±10g
• Interface: I²C
• Sensitivity: 1mg/bit
• Voltage - Supply: 1.95 V ~ 3.6 V
• Embedded: No
• Utilized Ic / Part: MAG3110
• Features: LFSTBUSB For Communication To PC, MAG3110FC & MMA8451Q For System Calibration
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Application Sub Type: Magnetic Sensor
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Freescale Semiconductor
10. Deliberately jam the eCompass by bringing it close to a spurious magnetic field (such as a
11. To unjam the eCompass, do either of the following:
— Observe how the Fit Error % field’s values increases, in going from the 10-element model to
The 7-element model simplifies the inverse soft-iron matrix to a diagonal matrix with zero
off-diagonal elements. The calibration parameters are the three hard-iron coefficients, the three
soft-iron matrix coefficients, and the geomagnetic field strength.
The 4-element model further simplifies the inverse soft iron matrix simplifies to a unit matrix. The
calibration parameters are the three hard-iron coefficients and the geomagnetic field strength.
notebook hard disc or a magnet from a desktop-telephone speaker).
— The Fit Error % field’s value increases and the number of green calibration bars drops from four
— The frame’s status field displays Jammed. Rotate to re-measure geomagnetic field.
— Move the eCompass away from the jamming source and rotate the evaluation board to obtain
— Click the Reset button to immediately discard all calibrations and rotate the evaluation board
the 4-element model, as a less-complete calibration model is used.
to one and are replaced by the red magnetic warning icon, as shown in the following figure.
new measurements of the geomagnetic field for calibration.
The Fit Error % value decreases and the number of green bars increases up to five, as the
jammed calibration measurements are replaced by newer measurements.
to capture new calibration data.
RD4247MAG3110 Sensor Toolbox Tilt-Compensated eCompass Kit User’s Guide, Rev. 2
Quick-Start Demonstration
11