參數(shù)資料
型號: LTC2259CUJ-12#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
封裝: 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40
文件頁數(shù): 10/32頁
文件大小: 790K
代理商: LTC2259CUJ-12#TRPBF
LTC2261-12
LTC2260-12/LTC2259-12
18
226112fa
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.
Amplier Circuits
Figure 7 shows the analog input being driven by a high
speed differential amplier. The output of the amplier is AC
coupled to the A/D so the amplier’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 amplier. 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.
25Ω
50Ω
0.1μF
AIN
+
AIN
1.8pF
0.1μF
VCM
ANALOG
INPUT
0.1μF
T1
T2
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1LB
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
226112 F05
LTC2261-12
25Ω
50Ω
0.1μF
AIN
+
AIN
4.7pF
0.1μF
VCM
ANALOG
INPUT
0.1μF
T1
T2
T1: MA/COM MABA-007159-000000
T2: MA/COM MABAES0060
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
226112 F04
LTC2261-12
25Ω
50Ω
0.1μF
2.7nH
AIN
+
AIN
0.1μF
VCM
ANALOG
INPUT
0.1μF
T1
T1: MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
226112 F06
LTC2261-12
相關(guān)PDF資料
PDF描述
LTC2259CUJ-12#PBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2260IUJ-12#TRPBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2260IUJ-12#PBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2260CUJ-12#TRPBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
LTC2260CUJ-12#PBF 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40
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