Low cost +/- 2g Dual Axis Accelerometer with Digital Outputs
The MXD2125ML is a low cost, dual axis accelerometer fabricated on a
standard, submicron CMOS process. It is a complete sensing system with on-chip
mixed mode signal processing. The MXD2125ML measures acceleration with a
full-scale range of ±2g and a sensitivity of 12.5%/g. It can measure both
dynamic acceleration (e.g. vibration) and static acceleration (e.g. gravity).
The MXD2125ML 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 of 50,000 g, leading to significantly lower
failure rate and lower loss due to handling during assembly.
The MXD2125ML provides two digital outputs that are set to 50% duty cycle at
zero g acceleration. The outputs are digital with duty cycles (ratio of pulse
width to period) that are proportional to acceleration. The duty cycle outputs
can be directly interfaced to a micro-processor.
The typical noise floor is 0.2 mg/ allowing signals
below 1 milli-g to be resolved at 1 Hz bandwidth. The MXD2125ML is packaged in a
hermetically sealed LCC surface mount package (5 mm x 5 mm x 2 mm height) and is
operational over a -40°C to 85°C temperature range. Click here