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參數(shù)資料
| 型號： | LTC2259IUJ-16#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | PROPRIETARY METHOD ADC, PQCC40 |
| 封裝： | 6 X 6 MM, LEAD FREE, PLASTIC, QFN-40 |
| 文件頁數(shù)： | 6/28頁 |
| 文件大小： | 318K |
| 代理商： | LTC2259IUJ-16#PBF |
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LTC2259-16
14
225916f
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
INPUT DRIVE CIRCUITS
Input Filtering
If possible, there should be an RC lowpass lter right at
the analog inputs. This lowpass lter isolates the drive
circuitry from the A/D sample-and-hold switching, and
also limits wideband noise from the drive circuitry. Figure 3
shows an example of an input RC lter. The RC component
values should be chosen based on the application’s input
frequency.
Figure 4. Recommended Front-End Circuit for
Input Frequencies from 70MHz to 170MHz
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
225916 F04
LTC2259-16
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
225916 F05
LTC2259-16
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
225916 F06
LTC2259-16
25Ω
50Ω
0.1μF
AIN
+
AIN
–
12pF
0.1μF
VCM
LTC2259-16
ANALOG
INPUT
0.1μF
T1
1:1
T1: MA/COM MABAES0060
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
225916 F03
Figure 3. Analog Input Circuit Using a Transformer.
Recommended for Input Frequencies from 5MHz to 70MHz
Transformer-Coupled Circuits
Figure 3 shows the analog input being driven by an RF
transformer with a center-tapped secondary. The center
tap is biased with VCM, setting the A/D input at its optimal
DC level. At higher input frequencies a transmission line
balun transformer (Figures 4 to 6) has better balance,
resulting in lower A/D distortion.
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| LTC2259CUJ-16#TRPBF | PROPRIETARY METHOD ADC, PQCC40 |
| LTC2259IUJ-16#TRPBF | PROPRIETARY METHOD ADC, PQCC40 |
| LTC2259IUJ-12#TRPBF | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| LTC2259IUJ-12#PBF | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
| LTC2259CUJ-12#TRPBF | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC40 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2259IUJ-16TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 80Msps Ultralow Power 1.8V ADC |
| LTC2259UJ-12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 125/105/80Msps Ultralow Power 1.8V ADCs |
| LTC2259UJ-14 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit, 125/105/80Msps Ultralow Power 1.8V ADCs |
| LTC2260-12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 125/105/80Msps Ultralow Power 1.8V ADCs |
| LTC2260-14 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 65Msps/40Msps/25Msps Low Power Dual ADCs |
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