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MMA685X bảng dữ liệu(PDF) 25 Page - Freescale Semiconductor, Inc

tên linh kiện MMA685X
Giải thích chi tiết về linh kiện  Single-Axis SPI Inertial Sensor
PDF  52 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MMA685X bảng dữ liệu(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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