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RM3100 & RM2100 Sensor Suite User Manual Page 5 of 45

3 Specifications

3.1 Geomagnetic Sensor Characteristics

Table 3-1: Geomagnetic Sensor Performance

Parameter

Cycle Counts

Units

100

200

Field Measurement Range

-800 to +800

Gain

LSB/ T

Sensitivity

Noise

Noise Density @ Max. Single-Axis Sample Rate

1.2

nT/ Hz

Repeatability over 200 T

Hysteresis over 200 T

Linearity over 200 T

0.5

Maximum Single-Axis Sample Rate

(divide by 3 for max. 3-axis sample rate)

1600

850

440

Single-Axis Average Current @ 24 Hz Sample

Rate (equivalent to 3-axis @ 8 Hz)

135

260

µA

Bias Resistor, R

121

External Timing Resistor for Clock, R

EXT

Circuit Oscillation Frequency

180

kHz

Operating Temperature

-40 to +85

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.

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