Sensors » Crista Sensor Head

Crista Sensor Head
CCT Part No. 900-00466-00

The Crista OEM Sensor Head

is a small, solder down, three axis inertial sensor package available for direct integration into end user applications. It provides high bandwidth raw measurements from the MEMS gyroscopic rate sensors and accelerometers. Direct SPI interface is provided to the A/D converter and serial EEPROM containing gain, temperature calibration, and alignment correction data. The Crista OEM Sensor Head is also available as complete IMU assembly with a RS-232 serial interface.

Key Features:

16 Bit Resolution Data Conversion
SPI interface to A/D and temp calibration corrections EEPROM
Three Axis Sensing, 300 deg/sec. rate and 10G acceleration
Gyro and accelerometer diagnostic test modes
Solder down inertial sensor for customer processor board

Download the Crista Sensor Head Data Sheet for complete specifications of the Crista Sensor Head.

Specifications

Interface

Serial Interface:
Data Output Rate:
Internal A/D Rate:

SPI to A/D and EEPROM
8 channels out at 10KHz
2 MHz SPI Clk

Electrical

Vin:
Power:

5.5 – 8 Volts
0.2 W (typical)

Mechanical

Size:
Weight:

1.10” x 1.15” x 0.59”
7.0 grams (0.25oz)

Gyros

	¹Range:	±300 º /sec
	²Scale Factor Error:	< 3 º/sec (@ 25 ºC)
	In-Run Bias Error
	Fixed Temperature:	< 0.2 º/sec (warmed up)
	Over Temperature:	< 0.6 º/sec
	Linear Acceleration Effects:	0.2 º /sec / G typical; 1.5 º /sec / G max uncorrected.
	Noise: (1, no over-samples)	< ± 0.7 º /sec
	³Cross Axis Rate Error:	2.6 % uncorrected (Includes alignment and off axis acceleration)
	A/D Measurement Resolution:	0.0155 º /sec
	Converted Data Rate Resolution:	0.009 º /sec (max rate = 300 º /sec)
	Bandwidth:	2 order LPF Fc=100 Hz

Accelerometers

	Range:	±10 G
	Scale Factor Error:	< 100 mG (0.98 m/s²) (@ 25 ºC)
	In-Run Bias Error:
	Fixed Temperature:	< 25 mG (0.245 m/s²)
	Over Temperature:	< 51 mG (0.500 m/s²)
	Turn-on to Turn-on Bias	< 30 mG (0.295 m/s²)
	Noise: (1, no over-samples)	< ± 12 mG (0.120 m/s²)
	³Cross Axis Error:	2.6 % uncorrected (Includes alignment and off axis acceleration)
	A/D Measurement Resolution:	0.62 mG
	Converted Data Rate Resolution:	0.30 mG (max rate = 10 G)
	Bandwidth:	Simple LPF. Fc=100 Hz.

Higher rate ranges for the Gyros are possible. Contact CCT for more information.
Based on room ambient temperature. Nonlinearity from best fit straight line. Typically much better at lower rates/accelerations.
Includes alignment and off axis acceleration.

Environmental

Operating Temperature:
Max Acceleration:

-40C to +70C (Calibrated Temperature Range )
500 G