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MMA1618KGCWR2

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45
Sensors
22 NXP Semiconductors
MMA16xx
3.5.3.2 Low-Pass Filter
Data from the Sinc filter is processed by an infinite impulse response (IIR) low-pass filter.
The device provides the option for one of three low-pass filters. The filter is selected with the LPF[1:0] bits in the TYPE register.
The filter selection options are listed in Section 3.1.2.1, Table 9. Response parameters for the low-pass filter are specified in
Section 2.8. Filter characteristics are illustrated in the figures below.
Note: Low-Pass Filter Figures do not include g-cell frequency response.
Table 9. Low-Pass Filter Coefficients
Description Filter Coefficients Group Delay
180 Hz LPF
a
0
0.000534069200512
4608/f
osc
n
11
0.25 d
11
1
n
12
0.499999985098839 d
12
-1.959839582443237
n
13
0.25 d
13
0.960373640060425
n
21
1d
21
1
n
22
0d
22
0
n
23
0d
23
0
400 Hz LPF
a
0
0.003135988372378
3392/f
osc
n
11
0.000999420881271 d
11
1.0
n
12
0.001998946070671 d
12
-1.892452478408814
n
13
0.000999405980110 d
13
0.89558845758438
n
21
0.250004753470421 d
21
1.0
n
22
0.499986037611961 d
22
-1.919075012207031
n
23
0.250009194016457 d
23
0.923072755336761
800 Hz LPF
a
0
0.011904109735042
1728/f
osc
n
11
0.003841564059258 d
11
1.0
n
12
0.007683292031288 d
12
-1.790004611015320
n
13
0.003841534256935 d
13
0.801908731460571
n
21
0.250001862645149 d
21
1.0
n
22
0.499994158744812 d
22
-1.836849451065064
n
23
0.250003993511200
d
23
0.852215826511383
Hz() a
0
n
11
z
0
⋅()n
12
z
1–
⋅()n
13
z
2–
⋅()++
d
11
z
0
⋅()d
12
z
1–
⋅()d
13
z
2–
⋅()++
--------------------------------------------------------------------------------------------
n
21
z
0
⋅()n
22
z
1–
⋅()n
23
z
2–
⋅()++
d
11
z
0
⋅()d
22
z
1–
⋅()d
23
z
2–
⋅()++
--------------------------------------------------------------------------------------------
⋅⋅=
Sensors
NXP Semiconductors 23
MMA16xx
Figure 16. Low-Pass Filter Characteristics: f
C
= 180 Hz, 2-Pole, t
S
= 16 μs
Sensors
24 NXP Semiconductors
MMA16xx
Figure 17. Low-Pass Filter Characteristics: f
C
= 400 Hz, 4-Pole, t
S
= 16 μs
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45

MMA1618KGCWR2

Mfr. #:
Buy MMA1618KGCWR2
Manufacturer:
NXP / Freescale
Description:
Accelerometers DSI2.5 Accelerometer, QFN 16
Lifecycle:
New from this manufacturer.
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