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MMA685X 데이터시트(PDF) 25 Page - Freescale Semiconductor, Inc

부품명 MMA685X
상세설명  Single-Axis SPI Inertial Sensor
PDF  52 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MMA685X 데이터시트(HTML) 25 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor, Inc.
25
MMA685x
3.8.1
DSP Clock
The DSP is clocked at 8 MHz, with an effective 6MHz operating frequency. The clock to the DSP is disabled for 1 clock prior
to each edge of the
ΣΔ modulator clock to minimize noise during data conversion. The bit streams from the two ΣΔ converters
are processed through independent data paths within the DSP.
Figure 12. Clock Generation
3.8.2
Decimation Sinc Filter
The serial data stream produced by the
ΣΔ converter is decimated and converted to parallel values by a 3rd order 16:1 sinc
filter with a decimation factor of 8 or 16, depending on the Low Pass Filter selected.
Figure 13. Sinc Filter Response, tS = 8 μs
8 MHz OSC
6 MHz Digital
1MHz Modulator
Hz
()
1z 16
–
–
16
1
z 1
–
–
()
×
-------------------------------------
3
=



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