ACCELEROMETER TINYSHIELD
ASD2511-R-A
DESCRIPTION
This TinyShield features the high performance and low power Bosch BMA250 3-axis
accelerometer. The BMA250 allows measurement of accelerations in three perpendicular
axes and thus senses tilt, motion, shock, and vibration in your projects. There is also an
integrated temperature sensor built in.
Even though the BMA250 is designed to run at 1.8V – the Accelerometer TinyShield
incorporates level shifters and a local power supply to ensure proper and safe operation
over the entire TinyDuino operating voltage range up to 5V.
To learn more about the TinyDuino Platform, click here
https://tinycircuits.com/pages/tinyduino-overview
TECHNICAL DETAILS
To see what other TinyShields this will work with or conflict with, check out
the TinyShield Compatibility Matrix
Bosch BMA250 Accelerometer Specs
o
3-axis (X, Y & Z)
o
Digital resolution: 10bit
o
Resolution: 3.9mg
o
Measurement ranges: +-2g, +-4g, +-8g, +-16g
o
Sensitivity: 2g: 256LSB/g, 4g: 128LSB/g, 8g: 64LSB/g, 16g: 32LSB/g
o
Zero-g offset (over lifetime): +-80mg
o
Bandwidths: 1000Hz… 8Hz
o
Low Power: 139uA @2kHz data rate
TinyDuino Power Requirements
o
Voltage: 3.0V - 5.5V
o
Current: 139uA (Normal Mode). Due to the low current, this board can be run using the
TinyDuino coin cell option
Pins Used
o
A5/SCL - I2C Serial Clock line
o
A4/SDA - I2C Serial Data line
Dimensions
o
20mm x 20mm (.787 inches x .787 inches)
o
Max Height (from lower bottom TinyShield Connector to upper top TinyShield
Connector): 5.11mm (0.201 inches)
o
Weight: 1 gram (.04 ounces)
NOTES
o
You can also use this shield without the TinyDuino – there are 0.1″ spaced
connections for power, ground, and the two I2C signals along the side of the TinyShield
to allow you to connect a different system. Warning: Revision 4 boards have a
mistake on the silkscreen, the pin marked VCC is actually SCL, the pin marked SCL is
actually SDA, and the pin marked SDA is actually VCC. If you connect this up the way it
is marked you will not damage the board.
o
Previous versions of this board will look a bit different and have the board number
ASD2611-R, however they are functionally equivalent to this updated version and the
accelerometer circuitry is identical. Earlier versions also had two interrupt pins broken
out to solder points, these are not present on the current version of this board.
https://tinycircuits.com/products/accelerometer‐tinyshield 7‐14‐17
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