SCA820-D04
Data Sheet
SCA820-D04 1-AXIS HIGH PERFORMANCE ACCELEROMETER WITH
DIGITAL SPI INTERFACE
Features
3.3V supply voltage
2
g measurement range
Single axis measurement in Z direction
30mg
offset accuracy over temp range
SPI digital interface
Enhanced self diagnostics features
Size 7.6 x 3.3 x 8.6 mm (w x h x l)
Qualified according to AEC-Q100 standard
Package, pin-out and SPI protocol compatible
with Murata digital accelerometer product family
RoHS compliant Dual Flat Lead (DFL) plastic
package suitable for lead free soldering process
and SMD mounting
Proven capacitive 3D-MEMS technology
Applications
SCA820-D04 is targeted to automotive applications
with high stability requirements. Typical applications
Hill Start Aid (HSA)
Electronic Parking Brake (EPB)
Roll Over detection
Suspension control
Motion and position measurements
General description
SCA820-D04 is a single axis inclinometer component based on Murata's capacitive 3D-MEMS technology. The
component integrates high accuracy micromechanical acceleration sensing together with a flexible SPI digital
interface. Dual Flat Lead (DFL) housing guarantees reliable operation over product lifetime.
SCA820-D04 is designed, manufactured and tested for high stability, reliability and quality requirements of automotive
applications. The inclinometer has an extremely stable output over wide ranges of temperature, humidity and
mechanical noise. The component is qualified to the AEC-Q100 standard and has several advanced self diagnostics
features. The DFL housing is suitable for SMD mounting and the component is compatible with the RoHS and ELV
directives.
SCA820-D04 is a part of Murata digital accelerometer family and fully compatible with multi axis accelerometers
(SCA2100 series and SCA3100 series) and other single axis accelerometers (SCA800 series).
Murata Electronics Oy
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Doc.nr. 82 700 00 D
SCA820-D04
Performance Characteristics
Vdd=3.3 V and ambient temperature unless otherwise specified.
Parameter
Condition
Min
3.0
Active mode
Power down mode
Measurement axes (Z)
Temperature range -40 ... +125 °C
@25 °C ±5°C
Temperature range -40 ... +125 °C
Temperature range -20 ... +85 °C
12 bit output
Between ±3°
Temperature range -40 ... +125 °C
@25 °C ±5°C
Temperature range -40 ... +125 °C
+1g ... -1g range, end point fit
+2g ... -2g range, end point fit
2-complement
-3dB frequency
Typ
A)
Analog and digital Vdd
Current consumption
Measurement range
Operating temperature
B)
Offset total error
C)
Offset calibration error
Offset temperature drift
Sensitivity
Total sensitivity error
Sensitivity calibration error
Sensitivity temperature drift
Linearity error
Cross-Axis sensitivity
Zero acceleration output
Amplitude response
Noise
Power on setup time
Output data rate
Output load
SPI clock rate
ESD
Solderability
Moisture level
Mechanical shock
ID register value
A)
B)
5
-2
-40
-70
-40
D)
-30
±18
E)
±25
±15
900
0.0637
±1.1
±1.3
Max
3.6
6.3
0.1
2
125
70
40
D)
30
-4
4
-20
-40
0
30
2
2000
20
40
±3.5
80
5
0.1
50
8
2
1
Human Body Model
Charge Device Model
IPC/JEDEC J-STD-020C, +245 ºC, 40 s
IPC/JEDEC J-STD-020C, Level 3
Customer readable ID register (27hex)
04
Units
V
mA
mA
g
°C
mg
mg
mg
mg
Count/g
°/Count
% FS
% FS
% FS
mg
mg
%
Counts
Hz
mg RMS
s
Hz
pF
MHz
kV
kV
20 000
g
C)
D)
E)
Typical
± values are ±3 sigma variation limits from validation test population.
Includes offset deviation from 0g value including calibration error and drift over lifetime, temperature and
supply voltage.
Includes offset deviation from 0g value including calibration error and drift over lifetime.
Offset drift due to temperature. Value is a relative value and has been centered to zero. Error defined as maximum change
of offset in temperature range. Offset (max)-Offset Min). 100% tested in production.
Biggest change
of output from RT value due temperature.
MOSI
MISO
SPI
C/V
A/D
SCK
Signal
conditioning
and filtering
CSB
Temp
sensor
PWM
Self diagnostics
PWM
Figure 1. SCA820-D04 Block Diagram
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SCA820-D04
Typical Performance characteristics
Offset calibration error
55
50
45
40
35
30
25
20
15
10
5
0
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
Offset [m g]
Percent of parts[%]
Temperature dependency of offset
25
20
15
+3 Sigma
10
5
0
-45
-5
Temp [
o
C]
-20
5
30
55
80
105
130
Mean
-3 Sigma
Percent of parts[%]
Offset drift at temperature range
-40 C…+125 C
55
50
45
40
35
30
25
20
15
10
5
0
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
Offset drift [mg]
o
o
Offset[mg]
Sensitivity at 25
o
C
40
Sensitivity drift at temperature range
-40
o
C…+125
o
C
35
30
Percent of parts[%]
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
880
885
890
895
900
905
910
915
920
925
930
Sensitivity [LSB/g]
Percent of parts[%]
25
20
15
10
5
0
-1.18
-1.14
-1.1
-1.06
-1.02
-0.98
-0.94
-0.9
-0.86
-0.82
-0.78
Sensitivity error [% FS]
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Doc. Nr. 82 700 00 D
SCA820-D04
Measument directions
Figure 1.
Accelerometer measuring directions.
Housing dimensions
Figure 2.
Housing dimensions
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Doc. Nr. 82 700 00 D
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