PNI RM3100 Sensor Suite - Manual (Page 6)

PNI Sensor Corporation Doc 1017252 r03
RM3100 & RM2100 Sensor Suite User Manual Page 5 of 45
3 Specifications
3.1 Geomagnetic Sensor Characteristics
Table 3-1: Geomagnetic Sensor Performance
1
Parameter
Cycle Counts
2
Units
50 100 200
Field Measurement Range
3
-800 to +800 T
Gain 20 38 75 LSB/ T
Sensitivity 50 26 13 nT
Noise 30 20 15 nT
Noise Density @ Max. Single-Axis Sample Rate 1.2 nT/ Hz
Repeatability over 200 T 15 8 8 nT
Hysteresis over 200 T 15 nT
Linearity over 200 T 0.5 %
Maximum Single-Axis Sample Rate
(divide by 3 for max. 3-axis sample rate)
1600 850 440 Hz
Single-Axis Average Current @ 24 Hz Sample
Rate (equivalent to 3-axis @ 8 Hz)
70 135 260 µA
Bias Resistor, R
b
121
External Timing Resistor for Clock, R
EXT
33 k
Circuit Oscillation Frequency 180 kHz
Operating Temperature -40 to +85 C
Footnotes:
1. Performance values are typical. Performance specifications established with a supply voltage of
3.0 V, a bias resistor of 121 Ω, an external timing resistor of 33 kΩ, and with measurements taken
at room temperature. Other bias resistors, external timing resistors and operating voltages may
be used, but performance will differ from the values listed. Contact PNI for additional information.
2. The cycle count setting (eg. 50 ,100, and 200) is user-configurable and set in the Cycle Count
Registers. See Section 4.1 for a discussion on how the RM3100 works, and Section 5.1 for how
to set the Cycle Count Registers.
3. Field measurement range is defined as the monotonic region of the output characteristic curve.
Field measurement range can be extended using different bias resistors.