MMA8452QR1 Freescale Semiconductor, MMA8452QR1 Datasheet - Page 2

• Manufacturer Part Number: MMA8452QR1
• Description: Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT
• Manufacturer: Freescale Semiconductor

Specifications of MMA8452QR1

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Digital Output - Number Of Bits: 8 bit, 12 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.95 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Digital Output - Bus Interface: I2C
• Shutdown: Yes
• Sensitivity: 256 count/g, 512 count/g, 1024 count/g
• Package / Case: QFN-16
• Output Type: Digital
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Acceleration Range: ± 2g, ± 4g, ± 8g
• No. Of Axes: 3
• Ic Interface Type: I2C
• Sensor Case Style: QFN
• No. Of Pins: 16
• Supply Voltage Range: 1.95V To 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Contents
1
2
3
4
5
6
2
MMA8452Q
Block Diagram and Pin Description .................................................................................................................................. 3
1.1
Mechanical and Electrical Specifications ......................................................................................................................... 6
2.1
2.2
2.3
2.4
Terminology ...................................................................................................................................................................... 10
3.1
3.2
3.3
Modes of Operation .......................................................................................................................................................... 10
Functionality ...................................................................................................................................................................... 11
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10 Serial I
Register Descriptions ....................................................................................................................................................... 18
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
5.5.1
5.5.2
5.10.1
Soldering Information .................................................................................................................................................. 5
Mechanical Characteristics ......................................................................................................................................... 6
Electrical Characteristics ............................................................................................................................................. 7
I
Absolute Maximum Ratings ........................................................................................................................................ 9
Sensitivity .................................................................................................................................................................. 10
Zero-g Offset ............................................................................................................................................................. 10
Self-Test .................................................................................................................................................................... 10
Device Calibration ..................................................................................................................................................... 11
8-bit or 12-bit Data .................................................................................................................................................... 11
Low Power Modes vs. High Resolution Modes ......................................................................................................... 12
Auto-WAKE/SLEEP Mode ........................................................................................................................................ 12
Freefall and Motion Detection ................................................................................................................................... 12
Transient Detection ................................................................................................................................................... 13
Tap Detection ............................................................................................................................................................ 13
Orientation Detection ................................................................................................................................................ 13
Interrupt Register Configurations .............................................................................................................................. 15
Data Registers ............................................................................................................................................................ 9
Portrait/ Landscape Embedded Function Registers ................................................................................................. 24
Motion and Freefall Embedded Function Registers .................................................................................................. 26
Transient (HPF) Acceleration Detection ................................................................................................................... 31
Single, Double and Directional Tap Detection Registers .......................................................................................... 33
Auto-WAKE/SLEEP Detection .................................................................................................................................. 37
Control Registers ...................................................................................................................................................... 38
User Offset Correction Registers .............................................................................................................................. 41
2
C Interface Characteristic ......................................................................................................................................... 8
Freefall Detection ........................................................................................................................................... 12
Motion Detection ............................................................................................................................................ 12
2
I
2
C Interface .................................................................................................................................................... 15
C Operation ................................................................................................................................................. 16
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