AN4292 NXP | Alldatasheet

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 9

Technical content

Datasheet sections

  • 1 DEMOMMA8491 Demo Board
  • 1.1 Acceleration directions
  • 1.2 Using the demo board
  • 1.3 Acceleration values are cumulative
  • 2 DEMOMMA8491 Breakout Board
  • 2.1 Pin map
  • 2.2 Suggested application connections
  • 2.3 Soldering considerations
  • 2.4 Evaluating performance
  • 3 Schematics and Bill of Materials (BOM)
  • 3.1 Demo board schematic
  • 3.2 Demo board BOM
  • 3.3 Breakout board schematic
  • 3.4 Breakout board BOM
  • 4 Revision History

2 Freescale Semiconductor, Inc.

1 DEMOMMA8491 Demo Board

a simple tilt sensor implemented with the MMA8491Q device, with 10 additional passive components. Figure 1. DEMMMA8491 demo board

1.1 Acceleration directions

direction on the MMA8491Q device. The right image shows the acceleration direction of the demo board. Figure 2. Sensor orientation

1.2 Using the demo board

detection result is simultaneously displayed with 3 LEDs (each LED is paired with one of the X, Y , Z axes). A lit LED indicates that a tilt angle greater than or equal to 45° is detected on that axis.

Figure 3 shows the LED status at 6 different orientations. Figure 3. LED states for different orientations

1.3 Acceleration values are cumulative

this case, that axis's output (XOUT, YOUT or ZOUT) is triggered to logic high. tilt detection when the board is at a position less than a 45°angle.

4 Freescale Semiconductor, Inc.

2 DEMOMMA8491 Breakout Board

and efficient access, with minimum soldering work. Figure 4. Breakout board C2). The board itself is a two-layer PCB, using a 0.1 inch pitch between the breakout pins.

2.1 Pin map

Table 1 maps the pins of the breakout board to the MMA8491Q device pins. Table 1. Breakout board to MMA8491Q sensor pins

2.2 Suggested application connections

To ensure that the accelerometer is fully functional, connect the breakout board as shown in Figure 5. Figure 5. Example application with I2C bus engaged This connection follows the recommendations listed in MMA8491Q data sheet. maintaining an acceptable level of power supply high-frequency filtering.

2.3 Soldering considerations

directly hand-solder wires to it. Table 1. Breakout board to MMA8491Q sensor pins (Continued)

6 Freescale Semiconductor, Inc.

2.4 Evaluating performance

For offset variation and board mount offset data, see the MMA81941Q data sheet. check, without having to use a reference accelerometer.

3 Schematics and Bill of Materials (BOM)

3.1 Demo board schematic

Figure 6. Demo board schematic

3.2 Demo board BOM

Table 2. Demo board BOM

3.3 Breakout board schematic

Figure 7. Breakout board schematic

3.4 Breakout board BOM

Table 3. Breakout board BOM Table 2. Demo board BOM (Continued)

DEMOMMA8491 Xtrinsic Accelerometer Evaluation Kit, Rev 0 8 Freescale Semiconductor, Inc. 4R e v i s i o n H i s t o r y Revision 0 is the initial release of this document.

Document Number: AN4292 Rev 0 Information in this document is provided solely to enable system and software implementers to use Freescale products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document. Freescale reserves the right to make changes without further notice to any products herein. Freescale makes no warranty, representation, or guarantee regarding the suitability of its products for any particular purpose, nor does Freescale assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters that may be provided in Freescale data sheets and/or specifications can and do vary in different applications, and actual performance may vary over time. All operating parameters, including “typicals,” must be validated for each customer application by customer’s technical experts. Freescale does not convey any license under its patent rights nor the rights of others. Freescale sells products pursuant to standard terms and conditions of sale, which can be found at the following address: freescale.com/salestermsandconditions. How to Reach Us: Home Page: freescale.com Web Support: freescale.com/support Freescale, the Freescale logo, AltiVec, C-5, CodeTest, CodeWarrior, ColdFire, C-Ware, Energy Efficient Solutions logo, Kinetis, mobileGT, PowerQUICC, Processor Expert, QorIQ, Qorivva, StarCore, Symphony, and VortiQa are trademarks of Freescale CoreNet, Flexis, MagniV, MXC, Platform in a Package, QorIQ Qonverge, QUICC Engine, Ready Play, SafeAssure, SMARTMOS, TurboLink, Vybrid, and Xtrinsic are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2012 Freescale Semiconductor, Inc.