參數(shù)資料
型號: AD9201ARS
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Dual Channel, 20 MHz 10-Bit Resolution CMOS ADC
中文描述: 2-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
封裝: SSOP-28
文件頁數(shù): 11/20頁
文件大?。?/td> 431K
代理商: AD9201ARS
AD9201
–11–
REV. D
QREFT
QREFB
IREFT
0.1
m
F
10
m
F
0.1
m
F
0.1
m
F
AD9201
REFSENSE
AVSS
1V
0.1
m
F
10
m
F
IREFB
VREF
0.1
m
F
0.1
m
F
10k
V
10k
V
ADC
CORE
INTERNAL
CONTROL
LOGIC
10
m
F
0.1
m
F
Figure 26. Reference Buffer Equivalent Circuit and Exter-
nal Decoupling Recommendation
For best results in both noise suppression and robustness
against crosstalk, the 4 capacitor buffer decoupling arrangement
shown in Figure 26 is recommended. This decoupling should
feature chip capacitors located close to the converter IC. The
capacitors are connected to either IREFT/IREFB or QREFT/
QREFB. A connection to both sides is not required.
DRIVING THE AD9201
Figure 27 illustrates the use of an AD8051 to drive the AD9201.
Even though the AD8051 is specified with 3 V and 5 V power,
the best results are obtained at
±
5 V power. The ADC input
span is 2 V.
ADC
17
16
1k
V
VREF
AD8051
3
2
50
V
1k
V
1k
V
6
22
V
22
V
0.33
m
F
0.01
m
F
10pF
10pF
24
V
Figure 27.
–120
0.0E+0
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
10
2.0E+6
1.0E+6
4.0E+6
6.0E+6
8.0E+6
10.0E+6
3.0E+6
5.0E+6
7.0E+6
9.0E+6
FUND
2ND
3RD
4TH
5TH
6TH
7TH
8TH
Figure 28. AD8051/AD9201 Performance
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