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參數(shù)資料
| 型號： | AD7609BSTZ-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 8-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP64 |
| 封裝： | ROHS COMPLIANT, MS-026BCD, LQFP-64 |
| 文件頁數(shù)： | 25/35頁 |
| 文件大?。?/td> | 1737K |
| 代理商： | AD7609BSTZ-RL |
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Preliminary Technical Data
AD7609
Rev. PrD | Page 31 of 35
OVERSAMPLING BY 16
0
500
1000
1500
2000
3000
4000
2500
3500
4500
–2
–3
–1
0
CODE
12
385
NUM
BE
R
O
F
O
CCURE
NCE
S
09
76
0-
0
48
3
406
3279
3833
657
14
Figure 52. Histogram of Codes—OS × 16 (6 Codes)
45
5090
341
OVERSAMPLING BY 32
0
1000
2000
3000
4000
5000
6000
–2
–1
CODE
01
NU
M
B
E
R
O
F
O
C
CU
R
E
NC
E
S
09
76
0-
0
49
2716
Figure 53. Histogram of Codes—OS × 32 (4 Codes)
1
5871
75
OVERSAMPLING BY 64
0
1000
2000
3000
4000
6000
5000
7000
–2
–1
CODE
01
NU
M
B
E
R
O
F
O
C
CU
R
E
NC
E
S
09
76
0-
0
50
2245
Figure 54. Histogram of Codes – OS × 64 (4 Codes)
When the oversampling mode is selected, this has the effect
of adding a digital filter function after the ADC. The different
oversampling rates and the CONVST x sampling frequency
produces different digital filter frequency profiles.
for the different oversampling rates. The combination of the
analog antialiasing filter and the oversampling digital filter can
be used to eliminate or reduce the complexity of the design of
the filter before the AD7609.The digital filtering combines steep
roll-off and linear phase response.
0
–10
–20
–30
–40
–50
–60
–70
–80
100
1k
10k
100k
10M
1M
–90
AT
T
E
N
UAT
IO
N
(
d
B
)
FREQUENCY (Hz)
AVCC = 5V
VDRIVE = 5V
TA = 25°C
10V RANGE
OS BY 2
09
76
0-
05
1
Figure 55. Digital Filter Response for OS × 2
0
–10
–20
–30
–40
–50
–60
–70
–80
100
1k
10k
100k
10M
1M
–100
–90
AT
T
E
N
UAT
IO
N
(
d
B
)
FREQUENCY (Hz)
09
76
0-
05
2
AVCC = 5V
VDRIVE = 5V
TA = 25°C
10V RANGE
OS BY 4
Figure 56. Digital Filter Response for OS × 4
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