參數(shù)資料
型號: DC1369A-H
廠商: Linear Technology
文件頁數(shù): 11/34頁
文件大小: 0K
描述: BOARD DEMO 105MSPS LTC2260-12
軟件下載: QuikEval II System
設(shè)計資源: DC1369A Design Files
標(biāo)準(zhǔn)包裝: 1
系列: *
相關(guān)產(chǎn)品: DC890B-ND - BOARD USB DATA COLLECTION
LTC2261-12
LTC2260-12/LTC2259-12
19
226112fc
For more information www.linear.com/LTC2261-12
applicaTions inForMaTion
Figure 5. Recommended Front-End Circuit for Input
Frequencies from 170MHz to 270MHz
Figure 6. Recommended Front-End Circuit for Input
Frequencies Above 270MHz
balun transformer (Figures 4 to 6) has better balance,
resulting in lower A/D distortion.
Amplifier Circuits
Figure 7 shows the analog input being driven by a high
speed differential amplifier. The output of the amplifier is
AC coupled to the A/D so the amplifier’s output common
mode voltage can be optimally set to minimize distortion.
Figure 4. Recommended Front-End Circuit for Input
Frequencies from 70MHz to 170MHz
At very high frequencies an RF gain block will often have
lower distortion than a differential amplifier. If the gain
block is single ended, then a transformer circuit (Figures 4
to 6) should convert the signal to differential before driv-
ing the A/D.
25
50
0.1F
AIN+
AIN–
1.8pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1LB
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
226112 F05
LTC2261-12
25
50
0.1F
AIN+
AIN–
4.7pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: MA/COM MABAES0060
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
226112 F04
LTC2261-12
25
50
0.1F
2.7nH
AIN+
AIN–
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T1: MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
226112 F06
LTC2261-12
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