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LTC6421-20 PDF预览

LTC6421-20

更新时间: 2023-12-20 18:45:28
品牌 Logo 应用领域
亚德诺 - ADI 放大器驱动驱动器
页数 文件大小 规格书
16页 245K
描述
双通道匹配 1.3GHz 差分放大器/ADC 驱动器

LTC6421-20 数据手册

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LTC6421-20  
Dual Matched  
1.3GHz Differential  
Amplifiers/ADC Drivers  
FEATURES  
DESCRIPTION  
TheLTC®6421-20isadualhighspeeddifferentialamplifier  
targeted at processing signals from DC to 140MHz. The  
part has been specifically designed to drive 12-, 14- and  
16-bitADCswithlownoiseandlowdistortion,butcanalso  
be used as a general-purpose broadband gain block.  
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Matched Gain 0.1dB  
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Matched Phase 0.2° at 100MHz  
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Channel Separation 80dB at 100MHz  
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1.3GHz –3dB Bandwidth; Fixed Gain of 10V/V (20dB)  
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IMD = –76dBc at 100MHz, 2V  
3
P-P  
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n
n
n
n
n
n
Equivalent OIP = 42dBm at 100MHz  
3
The LTC6421-20 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).  
1nV/√Hz Internal Op Amp Noise  
6.2dB Noise Figure  
Differential Inputs and Outputs  
Rail-to-Rail Output Swing  
40mA Supply Current (120mW) per Amplifier  
1V to 1.6V Output Common Mode Voltage,  
Adjustable  
DC- or AC-Coupled Operation  
20-Lead 3mm × 4mm × 0.75mm QFN Package  
The LTC6421-20 saves space and power compared to  
alternativesolutionsusingIFgainblocksandtransformers.  
The LTC6421-20 is packaged in a compact 20-lead  
3mm × 4mm QFN package and operates over the 40°C  
to 85°C temperature range.  
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APPLICATIONS  
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Differential ADC Driver  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
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Single Ended to Differential Conversion  
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IF Sampling (Diversity) Receivers  
Broadband I/Q Amplifiers  
Satellite Communications  
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TYPICAL APPLICATION  
Matched Dual Amplifiers with Output Common Mode Biasing  
3V  
1000pF  
0.1μF  
V
V
OCMA  
OCMA  
Distribution of Gain Match  
+
V
A
ENABLEA  
Z
IN  
= 200Ω  
0.1μF  
LTC6421-20  
40  
35  
30  
25  
20  
15  
10  
5
1000Ω  
100Ω  
–INA  
12.5Ω  
+OUTA  
V
V
OCMA  
OCMA  
V
INA  
0.1μF  
100Ω  
12.5Ω  
+INA  
OUTA  
1000Ω  
1000Ω  
V
V
0.1dB GAIN MATCHING  
0.1° PHASE MATCHING  
AT 100MHz  
0.1μF  
0.1μF  
100Ω  
100Ω  
12.5Ω  
12.5Ω  
+INB  
INB  
OUTB  
+OUTB  
V
V
OCMB  
OCMB  
V
INB  
0
0.25 0.15 0.05  
0.05  
0.15  
0.25  
CHANNEL-TO-CHANNEL GAIN MATCH (dB)  
1000Ω  
Z
= 200Ω  
IN  
642120 TA01b  
+
V
B
V
OCMB  
ENABLEB  
642120 TA01a  
1000pF  
0.1μF  
V
OCMB  
3V  
642120fb  
1

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