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SCA720-D01-1

P1-P3P4-P6P7-P9P10-P12P13-P13
SCA720-D01
Murata Electronics Oy 4/13
www.muratamems.fi Doc. nr. 82171500 Rev.A
1.3. Offset and sensitivity calibration
Vout offset is calibrated in 0g position:
(
)
gVOffset
out
1+=
[V]
Nominal offset is Vdd/2:
2
dd
nom
V
Offset =
[V]
Sensitivity is calibrated as:
(
)
(
)
g
gVgV
ySensitivit
outout
2
11 −−+
=
[V/g]
Nominal sensitivity is:
9375.0=
nom
ySensitivit
[V/g]
1.4. Error calculations
Total error is the allowed maximum error, which include partial error sources. Total error over
lifetime is specified as a sum of offset and sensitivity errors:
ErrorySensitivitErrorOffsetErrorTotal ___
+
=
[mg]
Offset error is specified as:
( )
ySensitivit
V
gVout
ErrorOffset
dd
2
1
_
−+
=
[mg]
Sensitivity error percent is specified as:
(
)
(
)
[
]
%100
211
%_ ×
−−−+
=
nom
nom
ySensitivit
ySensitivitggVoutgVout
ErrorySensitivit
Sensitivity error is specified as:
(
)
[
]
ySensitivit
ErrorySensitivitgVoutVout
ErrorySensitivit
%_1
_
×
+
−
=
[mg]
SCA720-D01
Murata Electronics Oy 5/13
www.muratamems.fi Doc. nr. 82171500 Rev.A
1.5. Supply voltage
Usage of external 100 nF power supply bypass capacitor is recommended.
ASIC start-up should be tolerant to noise between Vdd and GND. Recommended power-up ramp is
presented below.
Parameter
Min
Max
T
1
T
0
+ 0.1 µs
T
2
T
0
+ 100 µs
V
1
−0.3 V 0.5 V
V
2
4.5 V 5.5 V
Supply voltage ramp at startup.
Figure 2. V
DD
Start-up sequence.
T
0
T
1
T
2
supply voltage
V
2
t
V
1
SCA720-D01
Murata Electronics Oy 6/13
www.muratamems.fi Doc. nr. 82171500 Rev.A
1.6. Electrical Connection
The following is minimum requirement for electrical interface to the SCA720. If over-voltage or
reverse polarity protection is needed, please contact Murata Electronics Oy for application
information.
Usage of external minimum 100 nF power supply bypass capacitor is recommended. Maximum
rise time of V
DD
is 100 us.
If self-test (Pin 9) is not used it should be left floating.
Pins 1, 2, 3, 4, 6, 7 and 8 are left floating.
If the self test is used
If the self test is not used
Figure 3. Electrical connection of SCA720 component.
1
2
3
4
5
6
12
11
10
9
8
7
CLK
C1
NC
MODE
GND
NC
VDD
VOUT
EGND
ST
PGM
NC
SCA720
C1
≥ 100 nF
VDD
VOUT
1
2
3
4
5
6
12
11
10
9
8
7
CLK
C1
NC
MODE
GND
NC
VDD
VOUT
EGND
ST
PGM
NC
SCA720
C1
≥ 100 nF
VDD
VOUT
ST
P1-P3P4-P6P7-P9P10-P12P13-P13

SCA720-D01-1

Mfr. #:
Buy SCA720-D01-1
Manufacturer:
Murata Electronics
Description:
Accelerometers 1-Axis Accelerometer Analog
Lifecycle:
New from this manufacturer.
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