sca3000-e05pwb VTI Hamlin, sca3000-e05pwb Datasheet - Page 9

• Manufacturer Part Number: sca3000-e05pwb
• Description: Sca3000 Series 3-axis Accelerometer
• Manufacturer: VTI Hamlin

2.3 Motion Detection Mode
2.3.1
VTI Technologies Oy
www.vti.fi
Description
negative accelerations until a valid acceleration value is read. In Table 4 the maximum and
minimum acceleration register values that are in measuring range (for registers X_LSB … Z_MSB)
for SCA3000-D0x and SCA3000-E0x are presented.
Table 4. Maximum and minimum values in the SCA3000 measuring range.
In MD mode, the ADC's data is not fed to the signal processing channel shown in Figure 1 but to
the MD block. It consists of a digital band-pass filter (BPF), threshold level programmable digital
comparator and a configurable trigger function.
BPF's -3 dB low-pass frequency is 25 Hz …60 Hz and -3 dB high-pass frequency is
0.05 Hz …1 Hz. See Figure 2 below.
Figure 2. The MD band-pass filter's frequency response.
First positive
acceleration value
out of range
Maximum positive
acceleration value
in range
Minimum negative
acceleration value
in range
First negative
acceleration value
out of range
-10
-15
-20
-5
5
0
0.01
[mg]
dec
bin
[mg]
dec
bin
[mg]
dec
bin
[mg]
dec
bin
0.1
Doc.Nr. 8257300A.07
SCA3000-D01
SCA3000-D02
-
3072
0110 0000 0000 0xxx
2303.25 mg
3071
0101 1111 1111 1xxx
-2304 mg
-3072
1010 0000 0000 0xxx
-
-3073
1001 1111 1111 1xxx
Band Pass Filter's Response
1
Freq [Hz]
for reference only
SCA3000-E01
SCA3000-E02
-
3072
0110 0000 0000 0xxx
3071 mg
3071
0101 1111 1111 1xxx
-3072 mg
-3072
1010 0000 0000 0xxx
-
-3073
1001 1111 1111 1xxx
10
SCA3000-E04
-
3072
0110 0000 0000 0xxx
6142 mg
3071
0101 1111 1111 1xxx
-6144 mg
-3072
1010 0000 0000 0xxx
-
-3073
1001 1111 1111 1xxx
100
1000
SCA3000-E05
-
3072
0110 0000 0000 0xxx
19193.75 mg
3071
0101 1111 1111 1xxx
-19200 mg
-3072
1010 0000 0000 0xxx
-
-3073
1001 1111 1111 1xxx
Lower limit
Upper limit
SCA3000 Series
Rev.A.07
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