参数资料
型号: AD7607BSTZ
厂商: Analog Devices Inc
文件页数: 19/32页
文件大小: 0K
描述: IC DAS W/ADC 14BIT 8CH 64LQFP
标准包装: 1
类型: 数据采集系统(DAS),ADC
分辨率(位): 14 b
采样率(每秒): 200k
数据接口: DSP,MICROWIRE?,并联,QSPI?,串行,SPI?
电压电源: 模拟和数字
电源电压: 2.3 V ~ 5.25 V,4.75 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
AD7607
Data Sheet
Rev. B | Page 26 of 32
DIGITAL FILTER
The AD7607 contains an optional first-order digital sinc filter that
should be used in applications where slower throughput rates are
used and digital filtering is required. The oversampling ratio of
the digital filter is controlled using the oversampling pins, OS[2:0]
(see Table 9). OS 2 is the MSB control bit, and OS 0 is the LSB
control bit. Table 9 lists the oversampling bit decoding to select the
different oversample rates. The OS pins are latched on the falling
edge of BUSY. This sets the oversampling rate for the next
conversion (see Figure 43).
Selection of the oversampling mode has the effect of adding
a digital filter function after the ADC. The different oversampling
rates and the CONVST x sampling frequency produce different
digital filter frequency profiles.
Table 9. Oversample Bit Decoding
OS[2:0]
Oversampling Ratio
3 dB BW, 5 V Range (kHz)
3 dB BW, 10 V Range (kHz)
Maximum Throughput,
CONVST Frequency (kHz)
000
No oversampling
15
22
200
001
2
15
22
100
010
4
13.7
18.5
50
011
8
10.3
11.9
25
100
16
6
12.5
101
32
3
6.25
110
64
1.5
3.125
111
Invalid
CONVST A
AND
CONVST B
BUSY
OS x
tOS_SETUP
tOS_HOLD
CONVERSION N
CONVERSION N + 1
OVERSAMPLE RATE
LATCHED FOR CONVERSION N + 1
08096-
043
Figure 43. OS x Pin Timing
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