MC3433 3-Axis Accelerometer
GENERAL DESCRIPTION
FEATURES
Preliminary Datasheet
The MC3433 is a low-noise, integrated
digital output 3-axis accelerometer with a
feature set optimized for cell phones and
consumer product motion sensing.
Applications include user interface control,
gaming motion input, electronic compass tilt
compensation for cell phones, game
controllers, remote controls and portable
media products.
Range, Sampling & Power
±2g range
6,7, or 8-bit resolution
0.125 to 128 samples/sec
46 to 115 μA typical active current
Simple System Integration
I2C interface, up to 400 kHz
2 × 2 × 0.92 mm 12-pin package
‒
Pin-compatible to Bosch BMA2xx
Low noise and low power are inherent in
the monolithic fabrication approach, where
the MEMS accelerometer is integrated in a
single-chip with the electronics integrated
circuit.
Single-chip 3D silicon MEMS
<200μg / √Hz noise
In the MC3433 the internal sample rate can
be set from 0.125 to 128 samples / second.
The device supports the reading of sample
and event status via polling or interrupts.
mCube Proprietary.
© 2014 mCube Inc. All rights reserved.
APS-048-0025v1.6
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MC3433 3-Axis Accelerometer
Preliminary Datasheet
TABLE OF CONTENTS
1
2
3
3.1
3.2
3.3
3.4
3.5
Order Information............................................................................................................. 4
Functional Block Diagram ................................................................................................ 5
Packaging and Pin Description ........................................................................................ 6
Package Outline ................................................................................................................... 6
Package Orientation ............................................................................................................. 7
Pin Description ..................................................................................................................... 8
Typical Application Circuit .................................................................................................... 9
Tape and Reel ................................................................................................................... 10
4
4.1
4.2
4.3
Specifications................................................................................................................. 12
Absolute Maximum Ratings ................................................................................................ 12
Sensor Characteristics ....................................................................................................... 13
Electrical and Timing Characteristics.................................................................................. 14
4.3.1
4.3.2
4.3.3
5
5.1
5.2
Electrical Power and Internal Characteristics ....................................................... 14
I2C Electrical Characteristics ............................................................................... 15
I2C Timing Characteristics ................................................................................... 16
Sensor Sampling ................................................................................................................ 17
Offset and Gain Calibration ................................................................................................ 18
General Operation ......................................................................................................... 17
6
7
8
8.1
8.2
Operational States ......................................................................................................... 19
Operational State Flow .................................................................................................. 20
Interrupts........................................................................................................................ 21
Enabling and Clearing Interrupts ........................................................................................ 21
ACQ_INT Interrupt ............................................................................................................. 21
9
9.1
Sampling ........................................................................................................................ 22
Continuous Sampling ......................................................................................................... 22
10
10.1
10.2
10.3
10.4
I2C Interface .................................................................................................................. 23
Physical Interface ............................................................................................................... 23
Timing ................................................................................................................................ 24
I2C Message Format .......................................................................................................... 24
Watchdog Timer ................................................................................................................. 25
11
Register Interface .......................................................................................................... 26
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mCube Proprietary.
© 2014 mCube Inc. All rights reserved.
MC3433 3-Axis Accelerometer
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
11.13
11.14
11.15
Preliminary Datasheet
Register Summary ............................................................................................................. 27
XOUT, YOUT & ZOUT X, Y & Z-Axis Accelerometer Registers .......................................... 28
SR Status Register............................................................................................................. 29
OPSTAT Device Status Register ........................................................................................ 30
INTEN Interrupt Enable Register ........................................................................................ 31
MODE Register .................................................................................................................. 32
SRFR Sample Rate Register.............................................................................................. 33
OUTCFG Output Configuration Register ............................................................................ 34
X-Axis Offset Registers ...................................................................................................... 35
Y-Axis Offset Registers ...................................................................................................... 36
Z-Axis Offset Registers ...................................................................................................... 37
X-Axis Gain Registers ........................................................................................................ 38
Y-Axis Gain Registers ........................................................................................................ 39
Z-Axis Gain Registers ........................................................................................................ 40
PCODE Product Code........................................................................................................ 41
12
13
14
Index of Tables .............................................................................................................. 42
Revision History ............................................................................................................. 43
Legal .............................................................................................................................. 44
mCube Proprietary.
© 2014 mCube Inc. All rights reserved.
APS-048-0025v1.6
3 / 44
MC3433 3-Axis Accelerometer
Preliminary Datasheet
1 ORDER INFORMATION
Part Number
MC3433
Resolution
8-bit
Order Number
MC3433
Package
VLGA-12
Shipping
Tape & Reel, 5Ku
Table 1. Order Information
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© 2014 mCube Inc. All rights reserved.
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MC3433 3-Axis Accelerometer
Preliminary Datasheet
2 FUNCTIONAL BLOCK DIAGRAM
VDD/VDDIO
Sensors
Regulators
and Bias
Oscillator/
Clock
Generator
Mode Logic
Interrupt
INTN
X
X,Y,Z
data paths
SCL
Range &
Scale
en
Registers
(64 x 8)
I2C Slave
Interface
SDA
Y
C to V
A/D Converter
(Sigma Delta)
Offset/
Gain
Adjust
GND
Z
OTP
Memory
VPP
Figure 1. Block Diagram
mCube Proprietary.
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