|Category||Sensors => Velocity Sensors => Accelerometers => (acceleration/motion sensor)|
|Description||Sensitivity = 500mV/g ;; Temperature Range = -40ºC to +105ºC ;;|
|Datasheet||Download MXA2500UL datasheet
|Ultra Low Noise, ±1 g Dual Axis Accelerometer with Analog Outputs
FEATURES Better than 1 milli-g resolution Dual axis accelerometer fabricated on a monolithic CMOS IC On-chip mixed mode signal processing No moving parts 50,000 g shock survival rating 25 Hz bandwidth expandable to 5.25V single supply continuous operation Small x 2mm) surface mount package Continuous self test Custom programmable specifications Independent axis programmability (special order) APPLICATIONS
Automotive Vehicle Security/Active Suspension/ABS Headlight Angle Control/Tilt Sensing Security Gas Line/Elevator/Fatigue Sensing Office Equipment Computer Peripherals/PDA's/Mouse Smart Pens/Cell Phones Gaming Joystick/RF Interface/Menu Selection/Tilt Sensing White Goods Spin/Vibration Control GENERAL DESCRIPTION The is an ultra low noise and low cost, dual axis accelerometer fabricated on a standard, submicron CMOS process. is a complete sensing system with onchip mixed mode signal processing. The MXA2500U measures acceleration with a full-scale range ±1 g and a sensitivity at 25°C. (The MEMSIC accelerometer product line extends from ±10 g with custom versions available above ±10 g.) It can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity). The MXA2500U design is based on heat convection and requires no solid proof mass. This eliminates stiction and particle problems associated with competitive devices and provides shock survival 50,000 g, leading to significantly lower failure rates and lower loss due to handling during assembly.Internal Oscillator Temperature Sensor Voltage Reference Continous Self Test
Factory Adjust Offset & Gain Low Pass Filter
The MXA2500U provides an absolute analog output The typical noise floor is 0.2 mg/ Hz allowing signals below 1 milli-g to be resolved 1 Hz bandwidth. The 3dB rolloff of the device occurs 25 Hz but is expandable >160 Hz (ref. Application Note AN-00MX-003). The MXA2500U is available in a low profile LCC surface mount package x 2 mm). It is hermetically sealed and is operational over to +105°C temperature range. It also contains an on-chip temperature sensor and a bandgap voltage reference. Due to the standard CMOS structure of the MXA2500U, additional circuitry can easily be incorporated into custom versions for high volume applications. Contact the factory for more information.
Information furnished by MEMSIC is believed to be accurate and reliable. However, no responsibility is assumed by MEMSIC for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of MEMSIC.
MEMSIC, Inc. 800 Turnpike Street, Suite 202 , North Andover, MA 01845 Tel: 978.738.0900 Fax: 978.738.0196 www.memsic.com
MXA2500U SPECIFICATIONS (Measurements @ 25°C, Acceleration 0 g unless otherwise noted; VDD, VDA = 5.0V
Parameter SENSOR INPUT Measurement Range1 Nonlinearity Alignment Error2 Transverse Sensitivity3 SENSITIVITY Sensitivity, Analog Outputs at pins AOUTX and AOUTY6 Change over Temperature (uncompensated)4 Change over Temperature (compensated) 4 ZERO g BIAS LEVEL 0 g Offset over Temperature NOISE PERFORMANCE Noise Density, rms FREQUENCY RESPONSE 3dB Bandwidth - uncompensated 3dB Bandwidth - compensated5 TEMPERATURE OUTPUT Tout Voltage Sensitivity VOLTAGE REFERENCE VRef Change over Temperature Current Drive Capability SELF TEST Continuous Voltage at AOUTX, AOUTY under Failure Continuous Voltage at AOUTX, AOUTY under Failure AOUTX and AOUTY OUTPUTS Normal Output Range Current Turn-On Time POWER SUPPLY Operating Voltage Range Supply Current Supply Current6,7 TEMPERATURE RANGE Operating Range NOTES
Guaranteed by measurement of initial offset and sensitivity. Alignment error is specified as the angle between the true and indicated axis of sensitivity. 3 Transverse sensitivity is the algebraic sum of the alignment and the inherent sensitivity errors. 4 The sensitivity change over temperature for thermal accelerometers is based on variations in heat transfer that are governed by the laws of physics and it is highly consistent from device to device. Please refer to the section in this data sheet titled "Compensation for the Change of Sensitivity over Temperature" for more information. 5 External circuitry is required to extend the 3dB bandwidth. (ref. Application Note: AN-00MX-003).Conditions Each Axis Best fit straight line
Each Axis 475 from at 40°C from at +105°C from to +105°C Each Axis from 25°C from 25°C, based on 500mV/g Without frequency compensation @2.7V-5.25V supply Source @5.0V Supply, output rails to supply voltage @2.7V Supply, output rails to supply voltage @5.0V Supply @2.7V Supply Source or sink, @ 2.7V-5.0V supply @5.0V Supply @2.7V Supply mV/g mg/°C mV/°C mg/ Hz V mV/°C V mV/°C µA
6 The device operates over to 5.25V supply range. Please note that sensitivity and zero g bias level will be slightly different at 2.7V operation. For devices to be operated 2.7V/3.0V in production, they can be trimmed at the factory specifically for this lower supply voltage operation, in which case the sensitivity and zero g bias level specifications on this page will be met. Please contact the factory for specially trimmed devices for low supply voltage operation. 7 Note that the accelerometer has a constant heater power control circuit thereby requiring higher supply current at lower operating voltage.
ABSOLUTE MAXIMUM RATINGS* Supply Voltage (VDD, to +7.0V Storage Acceleration............................................50,000 g
*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Pin Description: LCC-8 Package Pin Name Description 1 TOUT Temperature (Analog Voltage) 2 AOUTY Y-Axis Acceleration Signal 3 Gnd Ground 4 VDA Analog Supply Voltage 5 AOUTX X-Axis Acceleration Signal 6 Vref 2.5V Reference 7 Sck Optional External Clock 8 VDD Digital Supply Voltage Ordering Guide Model A2500UL Package Style LCC-8 SMD**LCC parts are shipped in tape and reel packaging.
Note: The MEMSIC logo's arrow indicates the +X sensing direction of the device. The +Y sensing direction is rotated 90° away from the +X direction following the right-hand rule.
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|MXD2004A Sensitivity = 4%/g ;; Temperature Range = -40ºC to +105ºC ;;|
|MXD2010A Sensitivity = 10%/g ;; Temperature Range = -40ºC to +105ºC ;;|
|MXD2020AL Sensitivity = 20%/g ;; Temperature Range = -40ºC to +105ºC ;;|
|MXD2020G Sensitivity = 20%/g ;; Temperature Range = -40ºC to +85ºC ;;|
|MXD2020U Sensitivity = 20%/g ;; Temperature Range = -40ºC to +105ºC ;;|
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|MXD7202MN Sensitivity = 12.5%/g ;; Temperature Range = 0ºC to +70ºC ;;|
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|MXR2999EL Sensitivity = 1000mV/g ;; Temperature Range = -40ºC to +105ºC ;;|
|MXR2999GL Sensitivity = 1000mV/g ;; Temperature Range = -40ºC to +85ºC ;;|
|MXR2999U Sensitivity = 1000mV/g ;; Temperature Range = -40ºC to +105ºC ;;|
|MXR7202GL Sensitivity = 312mV/g ;; Temperature Range = -40ºC to +85ºC ;;|
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