Web Site: www.parallax.com Office: (916) 624-8333 Forums: forums.parallax.com Fax: (916) 624-8003 Sales: sales parallax.com Sales: (888) 512-1024 Technical: support parallax.com Tech Support: (888) 997-8267 MMA7455 3-Axis Accelerometer Module ( 28526) Features General Description Wide input voltage range The Freescale Semiconductor MMA7455L 3-Axis 2 Digital output (SPI/I C) Digital Output Accelerometer is a low power, Selectable sensitivity: 8-bit mode micro-machined sensor capable of measuring (2g/4g/8g) or 10-bit mode (8g) acceleration along its X, Y, and Z axes. It User-configurable interrupts (INT1/INT2) offers several convenient integrated features User-settable registers for calibrating including an analog to digital converter (ADC), each axis digital low-pass filter, and selectable sensitivity Low current operation ranges of 2g, 4g, or 8g. This device can Compact, 8-pin DIP breadboard-friendly be easily configured to detect quick motion package: 0.5 x 0.6 (12.7 x 15.2 mm) pulses as single-taps, double-taps, and 0g (free-fall) conditions on any or all axes and provides configurable interrupt pins (INT1 and Application Ideas INT2) for each type of event. Inertial measurement units Flexibility and compatibility are designed into Tilt sensing for remote control systems this module. An on-board voltage regulator Single-tap or double-tap user input and I/O voltage level-shifters make this module Multi-axis vibration measurement especially easy to connect to virtually any Free-fall detection microcontroller. It operates over a wide range Motion sensing and data logging of supply voltages from 2.5 VDC to 5.5 VDC and Model airplane flight stabilization communicates via Serial Peripheral Interface 2 (SPI) or Inter-Integrated Circuit (I C) bus. Key Specifications Power requirements: 2.5 5.5 VDC 26 A standby, 0.5 3 mA active 2 Communication: SPI or I C Dimensions: 0.5 x 0.6 x 0.46 in (12.7 x 15.2 x 11.7 mm) Operating temperature: -40 to +185 F (-40 to +85 C) Note: Demonstration software files may be downloaded from the 28526 product page at www.parallax.com. Copyright Parallax Inc. MMA7455 3-Axis Accelerometer Module ( 28526) v1.1 9/24/2009 Page 1 of 6 +Z Package and Pin Descriptions +X +Y Pin Pin Name Description Pin Type 1 VIN Input supply voltage Power 2 n/c Not connected reserved for future use n/a 3 INT1 Interrupt 1/Data Ready Output 4 INT2 Interrupt 2 Output 5 GND Ground Power 2 6 CS Chip select - SPI Enable (0), I C Enable (1) Input 2 7 DATA I C Serial Data (SDA), SPI Serial Data (SDI/SDO) Input/Output 2 8 CLK I C Serial Clock (SCL), SPI Serial Clock (SPC) Input Absolute Maximum Ratings NOTE: These are conditions beyond which permanent device damage may occur it is not implied that the device will function properly throughout this range. For operational ranges, see the Operating Conditions section below. Parameter Min Typ Max Unit V (Measured from GND) 0 -- 6.5 V IN Storage temperature -40 -- +125 C DATA Pin Input Voltage -0.5 -- V + 0.5 V IN Pin Current -50 -- +50 mA Maximum Acceleration (all axes) -- -- 5000 g Copyright Parallax Inc. MMA7455 3-Axis Accelerometer Module ( 28526) v1.1 9/24/2009 Page 2 of 6