PNI RM3000-F Sensor Suite - Manual (Page 20)

PNI Sensor Corporation Doc #1016102 r04
RM3000-f & RM2000-f Sensor Suite User Manual Page 20
4 Geomagnetic Sensor Suite Overview & Set-Up
4.1 Overview
Figure 4-1 provides a basic schematic for implementing the RM3000-f Sensor Suite in
Standard Mode. The 3D MagIC is at the center of the schematic, as it ties the user’s host
controller, on the left, to the three geomagnetic sensors, on the right. To implement the
RM2000-f, simply do not connect the Sen-Z-f sensor. The 3D MagIC also can operate only
one sensor if desired. Unused sensor connections should remain floating. To implement
either Geomagnetic Sensor Suite in Legacy Mode, the Mode pin (pin #12) should be
connected to DVDD, rather than tied to ground.
Note: RM3000-f and RM2000-f Geomagnetic Sensor Suites typically are used in compassing
applications, where each channel represents a Cartesian coordinate axis (x, y, or z). For this reason,
the term “axis” generally is used instead of “channel”.
Figure 4-1: RM3000-f reference schematic
– Standard Mode
The Sen-XY-f or Sen-Z-f sensor serves as the inductive element in a simple LR relaxation
oscillation circuit which is composed of an external bias resistor along with digital gates and