1 (4)
DATA SHEET
SCA820-D04 1-AXIS HIGH PERFORMANCE ACCELEROMETER WITH
DIGITAL SPI INTERFACE
Features
Applications









SCA820-D04 is targeted to automotive applications
with high stability requirements. Typical applications


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 VTI 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





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 VTI'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 VTI 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
www.murata.com
SCA820-D04
Doc.No 82 700 00 D
2 (4)
Performance Characteristics
Vdd=3.3 V and ambient temperature unless otherwise specified.
Parameter
Condition
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)
C)
D)
E)
Min
3.0
Active mode
Power down mode
Measurement axes (Z)
Typ
A)
5
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
-2
-40
-70
-40
D)
-30
±18
E)
±25
±15
900
0.0637
-4
Max
3.6
6.3
0.1
2
125
70
40
D)
30
50
8
2
1
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
4
±1.1
±1.3
-20
-40
20
40
±3.5
0
30
2
80
5
0.1
2000
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
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
Figure 1. SCA820-D04 Block Diagram
Murata Electronics Oy
www.murata.com
SCA820-D04
Doc.No 82 700 00 D
PWM
3 (4)
Typical Performance characteristics
Percent of parts[%]
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]
Offset drift at temperature range
Temperature dependency of offset
o
o
-40 C…+125 C
25
15
+3 Sigma
10
Mean
-3 Sigma
5
Percent of parts[%]
Offset[mg]
20
0
-45
-20
5
30
55
80
105
130
-5
55
50
45
40
35
30
25
20
15
10
5
0
-25
Temp [o C]
-20
-10
-5
0
5
10
15
20
25
30
35
Offset drift [mg]
Sensitivity drift at temperature range
Sensitivity at 25oC
-40oC…+125oC
40
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
35
30
Percent of parts[%]
Percent of parts[%]
-15
25
20
15
10
5
0
880
885
890
895
900
905
910
915
920
925
930
-1.18
Murata Electronics Oy
www.murata.com
-1.14
-1.1
-1.06
-1.02
-0.98
-0.94
-0.9
-0.86
Sensitivity error [% FS]
Sensitivity [LSB/g]
SCA820-D04
Doc.No 82 700 00 D
-0.82
-0.78
4 (4)
Measurement directions
Figure 2. Accelerometer measuring directions.
Housing dimensions
Figure 3. Housing dimensions
Murata Electronics Oy
www.murata.com
SCA820-D04
Doc.No 82 700 00 D