CRM102.1

CRM102.1
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CRM102.1

Product catalog summary
Features:
  • Compact size: 5.7 x 4.8 x 1.2mm
  • Robust silicon MEMS vibrating ring gyro
  • In-plane and orthogonal sensing options
  • Dynamic range of 900º/s
  • Analogue and Digital (SPI®) output modes
  • User adjustable bandwidth up to 160Hz
  • 3V supply with low power consumption (4mA)
  • High shock and vibration rejection
  • Hermetically sealed ceramic LCC package
  • Integral temperature sensor
  • RoHS compliant
Applications:
  • GPS vehicle and personal navigation
  • Vehicle yaw, pitch, and roll rate sensing
  • Crash testing and accident recorders
  • Motion tracking and pointing devices
  • Model helicopters and vehicle dynamic testing
  • Industrial and robotics applications
General Description:

The PinPoint® is a single-axis MEMS angular rate sensor capable of measuring angular velocity up to ±1,000º/s. It offers both analogue and digital output modes, configurable by the user. The sensor is available in two configurations: CRM102.1 for in-plane sensing and CRM202.1 for orthogonal sensing. It is designed for surface mounting and includes components such as a silicon MEMS ring sensor and ASIC.

Specifications:
  • Measurement Range: ±900°/s
  • Analogue Output Mode Sensitivity: Scale Factor (k) = 0.001 x Vdd/3 V/°/s
  • Digital Output Mode Sensitivity: Scale Factor (k) = 8 LSB/°/s
  • Bias variation with temperature: -36°/s to +36°/s
  • Noise: Rate noise density of 0.05°/s/√Hz
  • Frequency Response: Bandwidth 5Hz to 160Hz
  • Temperature Range: Operating -20°C to +85°C, Storage -20°C to +125°C
  • Shock Resistance: Operating up to 500g, Survival up to 10,000g
  • Supply Voltage: 2.7V to 3.6V
  • Current Consumption: 4.0mA operating
Performance Characteristics:

Graphs in the datasheet illustrate the performance characteristics such as scale factor error, bias variation, and linearity error across different temperatures for both analogue and digital output modes.

Overview: The CRM102.1 Technical Datasheet provides detailed specifications and operational guidelines for the Precision Navigation and Pointing Gyroscope. It includes information on startup times, bias drift, and switch-on repeatability, as well as interface and pin configuration details.
Specifications: The gyroscope operates with a supply voltage range of 2.7V to 3.6V. The dynamic range for analogue output mode is set at ±900°/s. The bandwidth is adjustable via capacitor C2, with values ranging from 12Hz to 95Hz depending on the capacitor used.
Interface and Pin Configuration: The datasheet provides a detailed pinout and peripheral circuit diagrams for both analogue and digital output modes. Key pins include CBIT/SS for built-in test functions, SEL0/Dclk for clock output, and BIT_Out/Data_Out for data output. Pins 1, 5, 9, and 13 are for mechanical fixing and should not be electrically connected.
Built-In Test (BIT) and Commanded Built-In Test (CBIT): The gyroscope includes a health monitoring system that checks key parameters and sets a BIT_Out signal to indicate correct operation. A CBIT function allows users to initiate a test mode that simulates a rate signal offset.
Temperature Sensor: An internal temperature sensor is accessible via the digital interface, allowing for system-level thermal compensation. The sensor's sensitivity is approximately 2.75 LSB/°C.
Power Supply Noise Rejection: The gyroscope is a ratiometric sensor, meaning its output is influenced by both angular rate and supply voltage. Users should ensure good system decoupling to minimize noise and ripple effects.
Double-Sideband Suppressed Carrier Signal: The document discusses the importance of minimizing power supply ripple at frequencies around 22kHz, 66kHz, and 110kHz to ensure effective demodulation. It is recommended that switching regulators operate at frequencies not less than 150kHz.
PROG Pin 15: This pin is used for factory calibration via a One Time Programmable setting. It must be connected to Vdd to avoid damage.
Digital Mode Activation: To activate digital mode for the PinPoint® gyro, connect the MODE_SEL input to Vdd. This activates the internal ADC and switches I/O pins to secondary functions.
SPI® Interface: The digital interface operates as a 'Slave' in 'Mode 0' configuration. Data is transferred in 6-byte messages. The Host System acts as a SPI master, transferring data byte-by-byte.
SPI® Bus Limitation: Early samples with a lot identifier beginning with '1' have a known issue with the Data_Out pin remaining active when deselected. This has been corrected in later versions.
SPI® Timing Parameters: Detailed timing parameters are provided, including start, stop, hold times, and clock frequency recommendations.
Message Structure: Command and Status messages are structured in 6-byte formats, with specific bytes reserved for factory use and checksum validation.
Digital Bandwidth: The bandwidth is determined by capacitor C2, with a recommendation to use 560pF for optimal ADC performance.
SPI® Sampling Rate and Clock Frequency: Recommended data rate is 1kHz, with a SPI clock frequency between 100kHz and 8MHz.
Design Tools and Resources: Various resources are available for download, including datasheets, evaluation boards, CAD files, and reference circuits.
Cleaning and Soldering: Ultrasonic cleaning is not recommended due to the sensor's natural resonant frequency. Reflow soldering profiles are provided.
See more

Catalog excerpts

CRM102.1-1

SILICON# SENSING. www.siliconsensing.com pinpoint® Precision Navigation and Pointing Gyroscope CRM102.1 Technical Datasheet Features • Small (5.7 x 4.8 x 1.2mm) • Proven and robust silicon MEMS vibrating ring gyro • In-plane and orthogonal sensing options (CRM102.1, CRM202.1) • Dynamic range 900°/s • Analogue and Digital ( SPI® ) output modes • User adjustable bandwidth to 160Hz • 3V supply • Low noise • 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 Applications • High rate precision GPS vehicle and personal navigation aiding • High rate vehicle yaw, pitch and roll rate sensing • Crash testing • Accident recorders • Motion tracking • Pointing devices • Model helicopters • Vehicle dynamic testing • 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 ±1,000°/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 two basic configurations, one which will measure angular velocity about an axis perpendicular to the plane of the host PCBA, referred to as ‘in-plane’ sensing (Part Number CRM102.1) and one which measures angular velocity about an axis which is parallel to the plane of the host PCBA, referred to as ‘orthogonal’ sensing (Part Number CRM202.1). This datasheet relates to part number CRM102.1. With a combination of CRM102.1 and CRM202.1 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. Other Inclined angle custom package options for indash vehicle navigation can be produced if required. PinPoint® (CRM102.1 and CRM202.1) 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 2014 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.

 Open the catalog to page 1
CRM102.1-2

Precision Navigation and Pointing Gyroscope Technical Datasheet PROG Calibration Reset Trim Sets Interface Control Data_Out / BIT_Out Figure 1.1 CRM102.1 Functional Block Diagram Figure 1.2 CRM102.1 Overall Dimensions © Copyright 2014 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.

 Open the catalog to page 2
CRM102.1-3

Precision Navigation and Pointing Gyroscope Technical Datasheet 2 Ordering Information Part Number Sense Axis Measurement Range + ve CRM CYYM 102.1 M a d LLLDD e in SSSS Ja p a R n CRM20 2. CYYMLL 1 LDDS M ad e in SSSR Ja pa n Overall Dimensions Supply Voltage Single-axis PinPoint® MEMS Gyroscope. Sensing axis perpendicular (in-plane) to the host PCBA. Analogue or Digital (User Configured) Single-axis PinPoint® MEMS Gyroscope. Sensing axis parallel (orthogonal) to the host PCBA. Analogue or Digital (User Configured) 3 Specification Unless stated otherwise, the following specification values assume...

 Open the catalog to page 3
CRM102.1-4

SILICON# SENSING. www.siliconsensing.com pinoomt® Precision Navigation and Pointing Gyroscope CRM102.1 Technical DatasheetSpecification Continued Page 4 © Copyright 2014 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. Competitive sensor & power supply solutions worldwide

 Open the catalog to page 4
CRM102.1-5

pinpoint® Precision Navigation and Pointing Gyroscope CRM102.1 Technical Datasheet SILICON# SENSING. www.siliconsensing.com Specification Continued Parameter © Copyright 2014 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. Competitive sensor & power supply solutions worldwide

 Open the catalog to page 5
CRM102.1-6

SILICON# SENSING. www.siliconsensing.com pinpoint® Precision Navigation and Pointing Gyroscope .1 Technical Datasheet4 Absolute Minimum/Maximum Ratings Notes: Improper handling, such as dropping onto hard surfaces, can generate every high shock levels in excess of 10,000g. The resultant stresses can cause permanent damage to the sensor. Exposure to the Absolute Maximum Ratings for extended periods may affect performance and reliability. © Copyright 2014 Silicon Sensing Systems Limited. All rights reserved. Silicon Sensing is an Atlantic Inertial Systems, Sumitomo Precision Products joint venture...

 Open the catalog to page 6

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