CMA3000-D01
Data Sheet
CMA3000-D01 3-AXIS ULTRA LOW POWER ACCELEROMETER WITH
DIGITAL SPI AND I2C INTERFACE
Features
•
•
•
•
•
•
•
•
•
1.7 V – 3.6 V supply voltage
SPI and I2C digital interface
User selectable
• ±2 g and ±8 g measurement ranges
• sample rate & frequency response
Ultra low current consumption
• ≤ 70 uA with 100/400 Hz sample rate
• ≤ 11 uA with 40/10Hz sample rate
Interrupt signal triggered by data ready,
motion and free fall
Size 2x2x0.95 mm3
Proven capacitive 3D-MEMS technology
High shock durability
RoHS compliant / lead free soldering
C/V
Analog
calibration
&
ADC
Applications
CMA3000-D01 is targeted to battery operated
devices. Typical applications are but not limited
• Gaming input devices
• Computer peripherals
• Free fall detection
• Activity monitoring
DEMUX
1:3
Low-pass
Filter
Low-pass
Filter
SCK/SCL
SPI
&
I2C
i/f
Reference
NonVolatile
Memory
Motion
detector
Free fall
detector
MOSI/SDA
CSB
Low-pass
Filter
Oscillator
&
clock
MISO
Control
&
INT
INT
Figure 1 CMA3000-D01 Block Diagram
VTI Technologies Oy
www.vti.fi
PRELIMINARY - Subject to changes
Doc. Nr. 8277800.14
1/4
Rev. 13
CMA3000-D01
Performance Characteristics 1)
Parameter
Vdd
Digital I/O Vdd
Operating temperature **
Current consumption *
Acceleration range *
Offset calibration error * 3)
Offset temperature error ** 4)
Sensitivity * 5)
Sensitivity calibration error *
Sensitivity temperature error
** 6)
Non-Linearity ** 7)
Cross-Axis sensitivity ** 8)
Output Data Rate, ODR **
Bandwidth** 9)
Noise ** 10)
Turn on time ** 11)
I2C clock rate **
SPI clock rate **
*
**
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Condition
Vdd ≥ Digital I/O Vdd
ODR=400 Hz
ODR=100 Hz
ODR=40 Hz
ODR=10 Hz
Power down
G_RANGE bit 0
G_RANGE bit 1
G_RANGE bit 1
-40 ... +85 °C
X and Z axis
Y axis
Full scale = 2 g
Full scale = 8 g
-40 ... +85 °C
G_RANGE bit 1
MODE bits x10
MODE bits x01
MODE bits 011
MODE bits 100
Full scale=2 g,
ODR=100 Hz
Full scale=8 g,
ODR=400 Hz
ODR=400 Hz
ODR≤100 Hz
Typical supply range
1.7 – 2.7 V
Min
Typ 2)
Max
Extended supply range
2.7 – 3.6 V
Min Typ 2)
Max
1.7
1.7
-40
-8
-2
-100
2.5
1.8 / 2.5
70
50
11
7
4
±25
-40
-
3.3
3.3
70
50
14
9
3
±8
±2
±100
85
-
V
V
°C
µA
-
mg
-
±1
±2.5
56
14
±10
±0.02
-
mg/°C
-10
-
±1
±2.5
56
14
±0.02
-
-
% FS
%
Hz
-
1.5
1
400
100
40
10
ODR/5
13
-
Hz
mg
RMS
-
2.7
2.7
85
90
9
8
2
+100
+10
-
1.5
1
400
100
40
10
ODR/5
13
3
-
-
25
-
25
-
-
0.01
2.5/ODR
-
-
0.01
2.5/ODR
-
400
500
400
500
Units
G
Count/g
%
%/°C
s
kHz
kHz
100% tested in production
Qualified during product validation
The product is factory calibrated at 2.5 V in room temperature.
Typical values are not guaranteed.
Z-axis +1g position. Soldering process can cause offset shift which is typically less than 150 mg. Please see
TN68_CMA3000_Assembly_Instructions for further details.
Offset temperature error = {Count(0g)-Offset} / Sensitivity [ g ]. Sensitivity = Calibrated sensitivity.
Offset= Calibrated offset.
Sensitivity = {Count(+1g) - Count(-1g)}/2 [Count/g].
Sensitivity temperature error = {[Count(+1g)-Count(-1g)]/2 - Sensitivity} / Sensitivity x 100% [%].
Sensitivity = Calibrated sensitivity.
Best fit straight line.
The cross-axis sensitivity determines how much acceleration, perpendicular to the measuring axis,
couples to the output. The total cross-axis sensitivity is the geometric sum of the sensitivities of
the two axes which are perpendicular to the measuring axis. The angular alignment error
between X, Y and Z axis is included into the cross axis sensitivity.
Frequency responses with 1st order roll off according to Figure 3.
Average noise/axis over the measurement bandwidth defined as 1 (n 2 + n 2 + n 2 ) , where nx, ny and nz are
y
x
z
3
11)
the measured signal's standard deviation due to noise in x, y and z directions.
Settling error less than 1% of FS.
VTI Technologies Oy
www.vti.fi
PRELIMINARY - Subject to changes
Doc. Nr. 8277800.14
2/4
Rev. 14
CMA3000-D01
Figure 2 Package dimensions in mm with ±50 µm tolerance.
ODR/500
ODR/50
ODR/5
ODR/500
ODR/50
ODR/5
Figure 3 Typical Frequency responses of CMA3000-D01.
VTI Technologies Oy
www.vti.fi
PRELIMINARY - Subject to changes
Doc. Nr. 8277800.14
3/4
Rev. 14
CMA3000-D01
I2C
SPI
1
VDD
2
3
DVIO
4
MISO
100n
VDD
INT
CSB
VSS
DVIO
MOSI_SDA
MISO
SCK_SCL
8
7
6
5
INT
1
VDD
2
CSB
3
MOSI DVIO
4
SCK
100n
100n
VDD
VSS
INT
CSB
DVIO
MOSI_SDA
MISO
SCK_SCL
8
INT
7
6
5
SDA
SCL
100n
Figure 4 Application schematics for SPI and I2C bus
Note the
symmetrical
ground plane
under the
component.
Figure 5 Recommended layout pattern (not actual size, for reference only)
Table 1 Pin descriptions
Pin #
1
2
3
4
5
6
7
8
Name
VDD
VSS
DVIO
MISO
SCK_SCL
MOSI_SDA
CSB
INT
Function
Supply voltage
Ground
I/O Supply
SPI Serial Data Output (MISO)
SPI Serial Clock (SCK) / I2C Serial Clock (SCL)
SPI Serial Data Input (MOSI) / I2C Serial Data (SDA)
Chip select / I2C enable
Interrupt
Document Change Control
Rev.
0.1
…
0.7
0.8
0.9
0.10
Date
02-May-07
…
14-Feb-08
21-Apr-08
01-Jul-08
28-Aug-08
0.11
0.12
0.13
0.14
01-Sep-08
10-Dec-08
29-Dec-08
12-Jun-09
VTI Technologies Oy
www.vti.fi
Change Description
1st version
…
Performance characteristics update
Target values for offset and sensitivity, non-linearity and cross axis added.
Figure 1 & Table 1 pin names corrected, Figure 2,3 & 5 updated
Current consumption, sensitivity and sensitivity temperature error, non-linearity,
cross axis sensitivity and noise updated.
8g range noise level corrected.
Performance characteristics and notes updated. Figure 2 updated.
Version for launch
Performance characteristics update
PRELIMINARY - Subject to changes
Doc. Nr. 8277800.14
4/4
Rev. 14