CMA3000-A01
Data Sheet
CMA3000-A01 3-AXIS LOW POWER ANALOG OUTPUT
ACCELEROMETER
Features
•
•
•
•
•
•
•
•
1.7 V – 3.6 V supply voltage
Ratiometric analog voltage output for x, y
and z acceleration
User selectable ±2 g and ±8 g measurement
ranges
Low current consumption
• Active 180 uA
• Power down < 0.1uA
Size 2x2x0.95 mm3
Proven capacitive 3D-MEMS technology
High shock durability
RoHS compliant / lead free soldering
Applications
CMA3000-A01 is targeted to battery operated
devices. Typical applications are but not limited
• Gaming input devices
• Computer peripherals
• Free fall detection
• Activity monitoring
X-out
C/V
Analog
calibration
&
low-pass
filtering
Y-out
Z-out
Oscillator
&
clock
Reference
NonVolatile
Memory
Control
Range
PD
Figure 1 CMA3000-A01 Block Diagram
VTI Technologies Oy
www.vti.fi
PRELIMINARY - Subject to changes
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Rev. 12
CMA3000-A01
Performance Characteristics Targets 1)
Parameter
Vdd
Operating temperature **
Current consumption *
Acceleration range *
Offset * 3)
Offset calibration error * 3)
Offset temperature error ** 4)
Sensitivity * 5)
Sensitivity calibration error *
Sensitivity temperature error
** 6)
Non-Linearity ** 7)
Cross-Axis sensitivity ** 8)
Bandwidth** 9)
Noise ** 10)
Output resistance
*
**
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Condition
Power down
Active
Range pin set to "1"
Range pin set to "0"
X and Y axis
Z axis
Full scale=2 g,
T=+25 °C
-40 ... +85 °C
X and Z axis
Y axis
Full scale=2 g
Full scale=8 g
T=+25 °C
-40 ... +85 °C
CL =100 nF
СL =0 nF
X and Z axis
Y axis
Full scale=2 g
Full scale=8 g
Typical supply range
1.7 – 2.7 V
Min
Typ 2)
Max
1.7
-40
-2
-8
-100
-10
2.5
<0.1
180
Vdd/2
Vdd/2
+sens
±25
2.7
85
±1
±2.5
Vdd/6
Vdd/24
±0.02
30
1.5
1
50
28
120
200
300
300
32
Extended supply
range 2.7 – 3.6 V
Min
Typ 2)
Max
Units
2
8
-
2.7
-40
-2
-8
-
3.3
<0.1
200
Vdd/2
Vdd/2
+sens
±100
3.6
85
2
8
-
V
°C
µA
+100
-
-
mg
±1
±2.5
Vdd/6
Vdd/24
±10
±0.02
-
mg/°C
+10
-
3
70
30
1.5
1
50
70
% FS
%
Hz
120
200
300
300
32
600
600
36
Hz
600
600
36
28
g
V
V/g
V/g
%
%/°C
µg/√Hz
µg/√Hz
kΩ
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 130 mg. Please see
TN68_CMA3000_Assembly_Instructions for further details.
Offset temperature error = {Vout(0g)-Offset} / Sensitivity [ g ]. Sensitivity = Calibrated sensitivity.
Offset= Calibrated offset.
Sensitivity = {Vout(+1g) - Vout(-1g)}/2 [V/g] .
Sensitivity temperature error = {[Vout(+1g)-Vout(-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 responce -3dB roll off frequency = 1/(2π*32kΩ*CL), when CL≥50 nF.
Average noise/axis over the measurement bandwidth defined as 1 (n 2 + n 2 + n 2 ) , where nx, ny and nz are
3
x
y
z
the measured signal's standard deviation due to noise in x, y and z directions.
VTI Technologies Oy
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PRELIMINARY - Subject to changes
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Rev. 12
CMA3000-A01
Figure 2 Package dimensions in mm with ±50 µm tolerance.
1
VDD
2
3
4
VOUTZ
100n
VDD
VOUTY
VSS
VOUTX
VDD
RANGE
VOUTZ
CL
PD
8
VOUTY
7
VOUTX
6
RANGE
5
CL
PD
CL
Figure 3 Application schematic
Note the
symmetrical
ground plane
under the
component.
Figure 4 Recommended layout pattern (not actual size, for reference only)
VTI Technologies Oy
www.vti.fi
PRELIMINARY - Subject to changes
Doc. Nr. 8278700.12
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Rev. 12
CMA3000-A01
Table 1 Pin descriptions
Pin #
Name
1
VDD
2
VSS
3
VDD
4
VOUTZ
5
PD
6
RANGE
7
VOUTX
8
VOUTY
Function
Supply voltage
Ground
Supply voltage
Output voltage Z-channel
Power Down
Acceleration Range selection
Output voltage X-channel
Output voltage Y-channel
Document Change Control
Rev.
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0.10
Date
15-May-07
22-May-07
24-Aug-07
10-Sep-07
11-Jan-08
16-Jan-08
14-Feb-08
03-Jun-08
04-Jul-08
28-Aug-08
0.11
0.12
10-Dec-08
29-Dec-08
VTI Technologies Oy
www.vti.fi
Change Description
1st version
Application schematic added
Pin order updated, component layout pattern added
Block diagram updated
Acceleration range control polarity updated
Offset level added, package drawing, pad layout updated
Performance characteristics update
Target values updated. Figure 2 updated.
Figure 2 updated.
Current consumption, sensitivity and sensitivity temperature error, non-linearity,
cross axis sensitivity and noise updated.
Performance characteristics and notes updated. Figure 2 updated.
Version for launch
PRELIMINARY - Subject to changes
Doc. Nr. 8278700.12
4/4
Rev. 12