参数资料
型号: MMA6826AKW
厂商: Freescale Semiconductor
文件页数: 26/54页
文件大小: 0K
描述: IC ACCELEROMETER XY AXIS 16QFN
标准包装: 75
轴: X,Y
加速范围: ±60g
灵敏度: 8.2 LSB/g
电源电压: 3.135 V ~ 5.25 V
输出类型: SPI
带宽: 400Hz
接口: SPI
安装类型: 表面贴装
封装/外壳: 16-QFN 裸露焊盘
供应商设备封装: 16-QFN-EP(6x6)
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.
8 MHz OSC
6 MHz Digital
1MHz Modulator
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.
1 – z – 16
H ( z ) = -------------------------------------
16 × ( 1 – z – 1 )
3
Figure 13. Sinc Filter Response, t S = 8 μ s
MMA68xx
Sensors
26
Freescale Semiconductor, Inc.
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