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LTC6420IUDC-20-PBF PDF预览

LTC6420IUDC-20-PBF

更新时间： 2024-11-21 05:44:03
品牌 Logo 应用领域
凌特 - Linear 驱动器放大器功率放大器
页数 文件大小 规格书
12页 208K
描述
Dual Matched 1.8GHz Differential Amplifi ers/ADC Drivers

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LTC6420IUDC-20-PBF 数据手册

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LTC6420-20  
Dual Matched  
1.8GHz Differential  
Amplifiers/ADC Drivers  
FEATURES  
DESCRIPTION  
TheLTC®6420-20isadualhigh-speeddifferentialamplifier  
targeted at processing signals from DC to 300MHz. The  
part has been specifically designed to drive 12-, 14- and  
16-bitADCswithlownoiseandlowdistortion,butcanalso  
be used as a general-purpose broadband gain block.  
n
Matched Gain ±±0.dꢀ  
n
Matched Phase ±±0.1 at .±±MꢁH  
n
Channel Separation 8±dꢀ at .±±MꢁH  
n
1.8GHz –3dB Bandwidth; Fixed Gain of 10V/V (20dB)  
n
IMD3 = –84dBc at 100MHz, 2V  
P-P  
n
Equivalent OIP3 = 46dBm at 100MHz  
The LTC6420-20 is easy to use, with minimal support  
circuitry required. The output common mode voltage  
is set using an external pin, independent of the inputs,  
whicheliminatestheneedfortransformersorAC-coupling  
capacitors in many applications. The gain is internally  
fixed at 20dB (10V/V).  
n
1nV/√Hz Internal Op Amp Noise  
n
6.2dB Noise Figure  
n
Differential Inputs and Outputs  
n
Rail-to-Rail Output Swing  
n
80mA Supply Current (240mW) per Amplifier  
n
1.1V to 1.6V Output Common Mode Voltage,  
The LTC6420-20 saves space and power compared to  
alternativesolutionsusingIFgainblocksandtransformers.  
The LTC6420-20 is packaged in a compact 20-lead  
3mm × 4mm QFN package and operates over the –40°C  
to 85°C temperature range.  
Adjustable  
DC- or AC-Coupled Operation  
n
n
20-Lead 3mm × 4mm × 0.75mm QFN Package  
APPLICATIONS  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
n
Differential ADC Driver  
n
Differential Driver/Receiver  
n
Single Ended to Differential Conversion  
IF Sampling (Diversity) Receivers  
n
TYPICAL APPLICATION  
Matched Dual Amplifier with Output Common Mode ꢀiasing  
Distribution of Gain Match  
3V  
40  
35  
30  
25  
20  
15  
10  
5
0.1μF  
1000pF  
V
A
OCM  
V
A
V+ A  
ENABLEA  
OCM  
Z
IN  
= 200Ω  
1000Ω  
0.1μF  
0.1μF  
100Ω  
100Ω  
12.5Ω  
12.5Ω  
–
–IN A  
+OUT A  
V
V
A
A
OCM  
OCM  
V
IN  
A
+IN A  
V–  
+
–OUT A  
V–  
1000Ω  
1000Ω  
0
0.1dB GAIN MATCHING  
0.1° PHASE MATCHING AT 100MHz  
LTC6420-20  
100Ω  
–0.25 –0.15 –0.05  
0.05  
0.15  
0.25  
CHANNEL-TO-CHANNEL GAIN MATCH (dB)  
0.1μF  
0.1μF  
642020 TA01b  
12.5Ω  
12.5Ω  
+IN B  
–IN B  
–OUT B  
+OUT B  
+
V
V
B
B
OCM  
OCM  
V
IN  
B
100Ω  
–
1000Ω  
Z
= 200Ω  
IN  
V+ B  
V
V
B
B
ENABLEB  
OCM  
OCM  
0.1μF  
1000pF  
642020 TA01a  
3V  
642020fa  
1
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