參數(shù)資料
型號(hào)： LTC2283IUP#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 6/24頁(yè)
文件大?。?/td> 0K
描述： IC ADC DUAL 12BIT 125MSPS 64QFN
標(biāo)準(zhǔn)包裝： 40
位數(shù)： 12
采樣率（每秒）： 125M
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 915mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 64-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 64-QFN（9x9）
包裝： 管件
輸入數(shù)目和類型： 2 個(gè)單端，雙極; 2 個(gè)差分, 雙極
LTC2283
14
2283fb
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
2283 F04
–
+
CM
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
AIN
+
AIN
–
LTC2283
25Ω
0.1μF
ANALOG
INPUT
VCM
AIN+
AIN–
1k
12pF
2283 F05
2.2μF
1k
25Ω
0.1μF
LTC2283
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
2283 F06
LTC2283
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
2283 F07
LTC2283
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
2283 F08
8.2nH
LTC2283
相關(guān)PDF資料
PDF描述
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LTC2283IUP-TR 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 12-Bit, 125Msps Low Power 3V ADC
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LTC2284 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual 14-Bit, 105Msps Low Power 3V ADC
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