參數(shù)資料
型號(hào): AD7194BCPZ-REEL7
廠商: Analog Devices Inc
文件頁數(shù): 46/57頁
文件大小: 0K
描述: IC ADC 24BIT SPI 4.8KHZ 32LFCSP
標(biāo)準(zhǔn)包裝: 1,500
位數(shù): 24
采樣率(每秒): 4.8k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 32-WFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-WQ(5x5)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 8 個(gè)差分,單極;8 個(gè)差分,雙極;16 個(gè)偽差分,單極;16 偽差分,雙極
Data Sheet
AD7194
Rev. A | Page 49 of 56
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08566-
062
Figure 63. Filter Response for Average + Decimate Filter
(Sinc3 Filter, FS[9:0] = 6, Average by 16)
Figure 64 shows the filter response when FS[9:0] is set to 5 and
the post filter averages by 16. In this case, the output data rate is
equal to 53.33 Hz when the first filter notch is placed at 60 Hz.
The rejection at 60 Hz ± 0.5 Hz is equal to 40 dB minimum.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08566-
063
Figure 64. Filter Response for Average + Decimate Filter
(Sinc3 Filter, FS[9:0] = 5, Average by 16)
Simultaneous 50 Hz/60 Hz rejection is achieved when FS[9:0] is
set to 30 and the postfilter averages by 16. The output data rate
is equal to 8.9 Hz, whereas the rejection at 50 Hz ± 0.5 Hz and
60 Hz ± 0.5 Hz is 42 dB typically.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FI
L
T
E
R
G
AI
N
(
d
B)
08566-
064
Figure 65. Filter Response for Average + Decimate Filter
(Sinc3 Filter, FS[9:0] = 30, Average by 16)
Simultaneous 50 Hz and 60 Hz rejection is also achieved by
using an FS word of 96 and averaging by 16, which places a
notch at 50 Hz. Setting the REJ60 bit to 1 places a notch at
60 Hz (see Figure 66). The output data rate is reduced to
2.78 Hz with this configuration, but the rejection is improved
to 94 dB typically at 50 Hz ± 1 Hz and 60 Hz ± 1 Hz.
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
30
60
90
120
150
FREQUENCY (Hz)
FILTE
R
G
A
IN
(
dB
)
08566-
065
Figure 66. Filter Response for Average + Decimate Filter
(Sinc3 Filter, FS[9:0] = 96, Average by 16)
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