Accelerometer FIFO Calculator

The Accelerometer FIFO Over-sampling Calculator is used to determine the necessary over-sampling ratio (OSR) to achieve an increased resolution. Select either the ADXL345 or ADXL346, and select whether you need to meet a system bandwidth requirement, or simply have a fixed accelerometer bandwidth you need to accomplish. Set the bandwidth, resolution, and max watermark inputs which meet your criteria, then hit the calculate button. The tool will determine how you should configure the accelerometer inorder to reach your input requirements, and calculate some output specifications using that configuration. For more detailed information about this tool please check out the complete document.

Input Parameters

Accelerometer

ADXL345	3-Axis digital accelerometer, user programmable input range.
ADXL346	3-Axis ultra-low power digital accelerometer, user programmable input range.

Bandwidth Selection

Accelerometer Bandwidth	Choose this if you're limited by the accelerometer bandwidth.
System Bandwidth	Choose this if you need to satisfy a specific system bandwidth.

Accelerometer Bandwidth:		Desired Resolution:		Allowable FIFO Samples:	(1-31)

Tool Recommendations

Accelerometer Configurations

Parameters	Output	Register Address	Register Value
Set FIFO Samples	---	0x38	x x x
Accelerometer Bandwidth	---	0x2C	x x x x
Read FIFO	---
Right Shift Data	---

Output Specifications

System Bandwidth	---
RMS Noise	---
Accelerometer Current	---
Oversampling Ratio	---

Message Box

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