SCA3000-D01 datasheet(9/43 Pages) VTI

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SCA3000 Series

VTI Technologies Oy

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Doc.Nr. 8257300A.07

Rev.A.07

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.

SCA3000-D01

SCA3000-D02

SCA3000-E01

SCA3000-E02

SCA3000-E04

SCA3000-E05

First positive

acceleration value

out of range

[mg]

dec

bin

3072

0110 0000 0000 0xxx

3072

0110 0000 0000 0xxx

3072

0110 0000 0000 0xxx

3072

0110 0000 0000 0xxx

Maximum positive

acceleration value

in range

[mg]

dec

bin

2303.25 mg

3071

0101 1111 1111 1xxx

3071 mg

3071

0101 1111 1111 1xxx

6142 mg

3071

0101 1111 1111 1xxx

19193.75 mg

3071

0101 1111 1111 1xxx

Minimum negative

acceleration value

in range

[mg]

dec

bin

-2304 mg

-3072

1010 0000 0000 0xxx

-3072 mg

-3072

1010 0000 0000 0xxx

-6144 mg

-3072

1010 0000 0000 0xxx

-19200 mg

-3072

1010 0000 0000 0xxx

First negative

acceleration value

out of range

[mg]

dec

bin

-3073

1001 1111 1111 1xxx

-3073

1001 1111 1111 1xxx

-3073

1001 1111 1111 1xxx

-3073

1001 1111 1111 1xxx

2.3

Motion Detection Mode

2.3.1

Description

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

25 Hz …60 Hz

and

-3 dB

high-pass

frequency

0.05 Hz …1 Hz. See Figure 2 below.

Band Pass Filter's Response

for reference only

-20

-15

-10

-5

0.01

0.1

100

1000

Freq [Hz]

Lower limit

Upper limit

Figure 2. The MD band-pass filter's frequency response.

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