CRM200 Datasheet, PDF (1/36 Pages) List of Unclassifed Manufacturers – Precision Navigation and Pointing Gyroscope CRM200 Technical Datasheet

Precision Navigation and Pointing Gyroscope
CRM200 Technical Datasheet
www.pinpoint-gyro.com
Actual size
Features
• Small (6.3 x 5.5 x 2.7mm)
• Proven and robust silicon MEMS vibrating ring gyro
• Low bias instability (24º/hr) over short integration
period (<1s)
• Low Angular Random Walk (0.28º/hr)
• In-plane, orthogonal and 20º inclined sensing options
(CRM100, CRM200 and CRM120)
• User selectable dynamic ranges; 75º/s, 150º/s,
300º/s and 900º/s (maximum 1,000º/s)
• Analogue and Digital ( SPI^® ) output modes
• User adjustable bandwidth to 160Hz
• 3V supply
• Low power consumption (4mA)
• High shock and vibration rejection
• Hermetically sealed ceramic LCC surface mount
package for temperature and humidity resistance
• Integral temperature sensor
• Low integration cost
• Design tools and resources available
• RoHS compliant
• AEC Q100 tested
Applications
• Automotive in-car navigation
• Precision GPS vehicle and personal navigation aiding
• Vehicle yaw, pitch and roll rate sensing
• Gesture sensing
• Motion tracking
• Pointing devices
• Precision agriculture
• Antenna stabilisation
• Industrial and robotics
1 General Description
PinPoint^® is a single-axis MEMS angular rate sensor
(gyro) capable of measuring angular velocity up to a
maximum of ±1,000º/s which has two output modes;
an analogue voltage signal which is linearly
proportional to angular speed, and a digital signal in
SPI^® protocol. The choice of output mode; analogue
or digital, is determined by the user when connecting
it to the user’s host PCBA; details of the electrical
interface between PinPoint^® and the host PCBA are
given in Section 7.
PinPoint^® is available in several configurations;
a) CRM100 which measures angular velocity about
an axis perpendicular to the plane of the host PCBA,
referred to as ‘in-plane’ sensing, b) CRM200 which
measures angular velocity about an axis which
is parallel to the plane of the host PCBA, referred
to as ‘orthogonal’ sensing and c) CRM120 which
measures angular velocity about an axis 20º off the
perpendicular for applications where the host PCBA is
a 20º an inclined angle. This datasheet relates to part
number CRM200.
With a combination of CRM100 and CRM200 it is
possible for the user to measure angular rate of
multiple axes (e.g. any combination of pitch, yaw and
roll) from a single host PCBA.
PinPoint^® is supplied as a PCBA surface mountable
LCC ceramic packaged device. It comprises five main
components; silicon MEMS ring Sensor, Pedestal,
ASIC, Package Base and Lid. More details of the
construction are given in Section 13.
There are eight actuators / transducers distributed
evenly around the perimeter of the silicon MEMS ring.
Located about its primary axes are a single pair of
‘primary drive’ actuators and a single pair of ‘primary
pick-off’ transducers. Located about its secondary
axes (at 45° to the primary) are two pairs of ‘secondary
pick-off’ transducers see Figure 1.1.
The ‘primary drive’ actuators and ‘primary pick-off’
transducers act together in a closed-loop system to
excite and control the ring primary operating vibration
amplitude and frequency.
Secondary ‘pick-off’ transducers detect radial movement
at the secondary axes, the magnitude of which is
proportional to the angular speed of rotation and from
which the gyro derives angular rate.
More information about the principles of operation are
given in Section 13.
© Copyright 2011 Silicon Sensing Systems Limited. All rights reserved. Silicon Sensing is an Atlantic Inertial Systems, Sumitomo Precision Products joint venture company.
Specification subject to change without notice.
CRM200-00-0100-132 Rev 5
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