High Performance North Seeking MEMS Gyroscope

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Introduction

ER-MG2-50/100, a high performance MEMS gyro sensor with 0.01-0.02°/hr bias instability and 0.0025-0.005°/√hr angular random walk, is specially designed for north seeking, pointing, initial alignment in logging tools/gyro tools, mining/drilling equipment, weapon/UAV launch systems, satellite antenna, target tracking system and so on. Thanks to the high performance, ER-MG2-50/100 can also used in high precision attitude measuring, stabilization control, positioning, navigating in navigation grade MEMS IMU/INS, land surveying/land mobile mapping system, railway train system, etc. So ER-MG2-50/100 is a best, cost effective, robust, reliable, small size, light weight, low power alternative of medium-low navigation grade FOG DTG with north seeking, precision attitude measuring , inertial positioning and navigation function.
The ER-MG2-50/100 High Performance North Seeking Gyroscope is a single-axis MEMS angular rate sensor (gyroscope) capable of measuring angular velocity up to a maximum of ±100°/s with digital output compliant to SPI slave mode 3 protocol. Angular rate data is presented as a 24-bit word.
The ER-MG2-50/100 is intended for north seeking applications. As an advanced, differential sensor design rejects the influence of linear acceleration, enabling ER-MG2-50/100 to operate in exceedingly harsh environments where shock and vibration are present.
The ER-MG2-50/100 is available in a hermetically sealed ceramic LCC surface mount package, and is capable of operating at 5V supply and a wide temperature range (−40°C to +85°C).
Features
Proven and robust silicon MEMS gyro
0.01-0.02°/hr bias instability
0.0025-0.005°/√hr angular random walk
Digital output (SPI slave)
5V operation (4.75~5.25V supply)
Low power consumption (35 mA)
High shock and vibration rejection
Hermetically sealed ceramic LCC surface mount package (11x11x2mm)
Integrated temperature sensor
RoHS compliant
Application areas
North seeking in logging tools/gyro tools
Pointing, steering and guiding in advanced mining/drilling equipment
Initial alignment in weapon/UAV launch systems
Direction pointing and tracking in satellite antenna, target tracking system
Guidance and navigation in navigation grade MEMS weapon system
Orientating and positioning in railway train system
Precision platform attitude measuring and controls
Precision attitude, position measuring in navigation grade MEMS IMU/INS
North finding and positioning in land surveying/land mobile mapping system
Petroleum exploration;
Bridge, tall building, tower, dam monitoring
Rock and soil monitoring
Mining
Specifications of North Seeking Gyroscope

Parameters	ER-MG2-50	ER-MG2-100	Unit
Range	50	100	deg/s
Resolution	24	24	bits
Data rate	2k	2k	Hz
Group delay	50	20	ms
Bandwidth (-3dB)	12	12	Hz
Scale factor at 25°C	160000	80000	lsb/deg/s
Scale factor repeatability (1σ)	<50	<50	ppm
Scale factor vs temperature (1σ)	300	300	ppm
Scale factor non-linearity (1σ)	<200	<200	ppm
Bias instability	<0.01	<0.02	deg/hr
Bias stability (1σ 10s)	<0.05	<0.1	deg/hr
Bias stability (1σ 1s)	<0.15	<0.3	deg/hr
Bias repeatability (1σ)	<0.1	<0.1	deg/hr
Angular random walk	<0.0025	<0.005	°/√h
Bias error over temperature (1σ)	3	3	deg/Hr
Bias temperature variations, calibrated (1σ)	<0.1	<0.3	deg/Hr
Noise peak to peak	±0.002	±0.003	deg/s
G-Sensitivity	<0.5	<1	°/hr/g
Vibration rectification error	<0.5	<1	°/hr/g (rms)
Startup time	1	1	s
Sensor resonant frequency	11~13	K
Environment, power and physical
Shock (charged)	1000g, 1ms, half sine wave
Shock (uncharged)	10000g, 1.0ms, half sine wave
Vibration (operating)	12grms, 20Hz to 2KHz random vibration
Operating temperature	-40°C~85°C
Max storage (survival) temperature	-55°C~125°C
Supply voltage	5±0.25V
Current consumption	40mA