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參數(shù)資料
| 型號： | LTC2281CUP#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DUAL 10BIT 125MSPS 64QFN |
| 標準包裝： | 2,000 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 125M |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉換器數(shù)目： | 2 |
| 功率耗散（最大）： | 915mW |
| 電壓電源： | 單電源 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 64-QFN（9x9） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個單端，雙極; 2 個差分, 雙極 |
LTC2281
14
2281fb
APPLICATIONS INFORMATION
Figure 4 demonstrates the use of a differential amplier to
convert a single ended input signal into a differential input
signal. The advantage of this method is that it provides
low frequency input response; however, the limited gain
bandwidth of most op amps will limit the SFDR at high
input frequencies.
Figure 5 shows a single-ended input circuit. The impedance
seen by the analog inputs should be matched. This circuit
is not recommended if low distortion is required.
The 25Ω resistors and 12pF capacitor on the analog
inputs serve two purposes: isolating the drive circuitry
from the sample-and-hold charging glitches and limiting
the wideband noise at the converter input.
For input frequencies above 70MHz, the input circuits of
Figure 6, 7 and 8 are recommended. The balun transformer
gives better high frequency response than a ux coupled
center tapped transformer. The coupling capacitors allow
the analog inputs to be DC biased at 1.5V. In Figure 8, the
series inductors are impedance matching elements that
maximize the ADC bandwidth.
Figure 4. Differential Drive with an Amplier
Figure 5. Single-Ended Drive
Figure 6. Recommended Front End Circuit for
Input Frequencies Between 70MHz and 170MHz
Figure 7. Recommended Front End Circuit for
Input Frequencies Between 170MHz and 300MHz
Figure 8. Recommended Front End Circuit for
Input Frequencies Above 300MHz
25Ω
12pF
2.2μF
VCM
2281 F04
–
+
CM
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
AIN
+
AIN
–
LTC2281
25Ω
0.1μF
ANALOG
INPUT
VCM
AIN
+
AIN
–
1k
12pF
2281 F05
2.2μF
1k
25Ω
0.1μF
LTC2281
25Ω
12Ω
0.1μF
AIN
+
AIN
–
8pF
2.2μF
VCM
ANALOG
INPUT
0.1μF
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
2281 F06
LTC2281
25Ω
0.1μF
AIN
+
AIN
–
2.2μF
VCM
ANALOG
INPUT
0.1μF
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
2281 F07
LTC2281
25Ω
0.1μF
AIN
+
AIN
–
2.2μF
VCM
ANALOG
INPUT
0.1μF
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS, INDUCTORS
ARE 0402 PACKAGE SIZE
2281 F08
8.2nH
LTC2281
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2281IUP | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 125Msps Low Power 3V ADC |
| LTC2281IUP#PBF | 功能描述:IC ADC 10BIT DUAL 64-QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| LTC2281IUP#TRPBF | 功能描述:IC ADC DUAL 10BIT 125MSPS 64QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端，雙極 |
| LTC2281IUP-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 125Msps Low Power 3V ADC |
| LTC2281IUP-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 10-Bit, 125Msps Low Power 3V ADC |
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