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X
Y
Z
VDD
GND
GND
GND
USB Power
Accelerometer
Attach Small Board to
Vibrating Object Using
Adhesive Tape on the
Bottom
Connect Oscilloscope Probes to X, Y, of Z Axis
Overview
1
Overview
There are various types of accelerometers available with different measurement ranges, thresholds,
precision, and accuracy, but in general, they all convert mechanical vibration into an electrical signal,
which can then be converted to acceleration.
The DRV-ACC16-EVM can measure acceleration up to 16
g
(“
g
” is the acceleration due to Earth’s gravity
or 9.81 m/s
2
). The EVM converts the acceleration from mechanical movement to mV at a rate of 57 mV
peak
per
g
peak
. This means that every 57 millivolts of peak voltage equals 1
g
of peak acceleration and 114
mV
peak
equals 2
g
’s of peak acceleration.
1.1
Required Equipment and Materials
•
DRV-ACC16-EVM accelerometer board
•
Micro-USB cable for power
•
Oscilloscope for measuring voltage
•
Adhesive transfer tape (see
)
1.2
Quick Start Connections
Figure 1. Board Connections
1. Attach the small accelerometer board to the vibrating object
2. Connect an oscilloscope to test points X, Y, and/or Z
3. Provide USB 5-V power
1.3
DRV-ACC16-EVM Specifications
lists the DRV-ACC16-EVM specifications.
Table 1. DRV-ACC16-EVM Specifications
Value
Units
Board Size (Total)
15 x 290
mm
Board Size (Accelerometer Only)
16.6 x 15
mm
Cable / Flex Length
203
mm
Interface
Analog
-
VDD
3.5 – 5.5
V
Acceleration Range
±16
g
peak
Bandwidth (X, Y channels)
1600
Hz
Bandwidth (Z channel)
550
Hz
Noise Density
300
µ
g
/
√
Hz rms
Conversion Ratio
57
mV
peak
/
g
peak
DC Offset (at 0
g
)
1.5
V
Typical Temperature Dependency (-25°C to 70°C)
< 3
mg
3
SLOU402 – June 2015
DRV-ACC16-EVM Accelerometer User’s Guide
Copyright © 2015, Texas Instruments Incorporated