MMA7260QR2 Freescale, MMA7260QR2 Datasheet - Page 8

• Manufacturer Part Number: MMA7260QR2
• Manufacturer: Freescale

Specifications of MMA7260QR2

• Package Type: QFN EP
• Operating Supply Voltage (min): 2.2V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 6mm
• Product Height (mm): 1.45mm
• Product Length (mm): 6mm
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Compliant

4.3
Tilt Module
The Tilt Module translates the g readings of each axis to an angle of rotation. It displays the current
physical angle of the transmitter board on the X, Y, and Z axes as shown in
Figure
7.
Use cases could include medical applications that incorporate a tilt range in physical therapy boards or
medical equipment monitoring. In these cases, the accelerometers could be used to ensure that the
equipment is used properly. For example, wrist mounted heartbeat monitors will obtain the most accurate
measurement if the blood pressure sensing board is at the same elevation as the heart. By using an
accelerometer to measure the angle of the arm, the monitor can guide users to the correct arm position
before taking the measurement. The accuracy and repeatability of the blood pressure measurement is
greatly increased by using the tilt information to tell users exactly where to position their arm. In addition,
the accelerometer would be constantly sensing motion and position and be able to stop a measurement if
a user's arm shifts out of the proper position. Through software, the monitor would be able to monitor the
patient’s arm for movement, identify the angle of the patient’s arm, and determine if the angle of the
patient’s arm has changed.
Figure 7. Tilt Module
Accelerometer Demonstration Application Note, Rev. 1.1
8
Freescale Semiconductor