SCA820-D04
Murata Electronics Oy 1/4 1/4
www.muratamems.fi Doc.nr. 82 700 00 D
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).
Data Sheet
SCA820-D04
Murata Electronics Oy 2/4 2/4
www.muratamems.fi Doc. Nr. 82 700 00 D
Performance Characteristics
Vdd=3.3 V and ambient temperature unless otherwise specified.
Parameter
Condition
Min
Typ A)
Max
Units
Analog and digital Vdd
3.0
3.6
V
Current consumption
Active mode
Power down mode
5
6.3
0.1
mA
mA
Measurement range
Measurement axes (Z)
-2
2
g
Operating temperature
-40
125
°C
Offset total error B)
Temperature range -40 ... +125 °C
-70
70
mg
Offset calibration error C)
@25 °C ±5°C
-40
±18
40
mg
Offset temperature drift
Temperature range -40 ... +125 °C
Temperature range -20 ... +85 °C
-30 D)
±25E)
±15
30 D)
mg
mg
Sensitivity
12 bit output
Between ±3°
900
0.0637
Count/g
°/Count
Total sensitivity error
Temperature range -40 ... +125 °C
-4
4
% FS
Sensitivity calibration error
@25 °C ±5°C
±1.1
% FS
Sensitivity temperature drift
Temperature range -40 ... +125 °C
±1.3
% FS
Linearity error
+1g ... -1g range, end point fit
+2g ... -2g range, end point fit
-20
-40
20
40
mg
mg
Cross-Axis sensitivity
±3.5
%
Zero acceleration output
2-complement
0
Counts
Amplitude response
-3dB frequency
30
80
Hz
Noise
2
5
mg RMS
Power on setup time
0.1
s
Output data rate
2000
Hz
Output load
50
pF
SPI clock rate
8
MHz
ESD
Human Body Model
Charge Device Model
2
1
kV
kV
Solderability
IPC/JEDEC J-STD-020C, +245 ºC, 40 s
Moisture level
IPC/JEDEC J-STD-020C, Level 3
Mechanical shock
20 000
g
ID register value
Customer readable ID register (27hex)
04
A) Typical ± values are ±3 sigma variation limits from validation test population.
B) Includes offset deviation from 0g value including calibration error and drift over lifetime, temperature and
supply voltage.
C) Includes offset deviation from 0g value including calibration error and drift over lifetime.
D) 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.
E) Biggest change of output from RT value due temperature.
MOSI
MISO
SCK
CSB
C/V A/D Signal
conditioning
and filtering
SPI
Self diagnostics
PWM PWM
Temp
sensor
Figure 1. SCA820-D04 Block Diagram
SCA820-D04
Murata Electronics Oy 3/4 3/4
www.muratamems.fi Doc. Nr. 82 700 00 D
Typical Performance characteristics
Offset calibration error
0
5
10
15
20
25
30
35
40
45
50
55
-25 -20 -15 -10 -5 0 5 10 15 20 25 30 35
Offset [mg]
Percent of parts[%]
Temperature dependency of offset
-5
0
5
10
15
20
25
-45 -20 5 30 55 80 105 130
Temp [oC]
Offset[mg]
+3 Sigma
Mean
-3 Sigma
Offset drift at temperature range
-40oC…+125oC
0
5
10
15
20
25
30
35
40
45
50
55
-25 -20 -15 -10 -5 0 5 10 15 20 25 30 35
Offset drift [mg]
Percent of parts[%]
Sensitivity at 25oC
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
880 885 890 895 900 905 910 915 920 925 930
Sensitivity [LSB/g]
Percent of parts[%]
Sensitivity drift at temperature range
-40oC…+125oC
0
5
10
15
20
25
30
35
40
-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]
Percent of parts[%]
SCA820-D04
Murata Electronics Oy 4/4 4/4
www.muratamems.fi Doc. Nr. 82 700 00 D
Measument directions
Figure 1. Accelerometer measuring directions.
Housing dimensions
Figure 2. Housing dimensions
