LT5571 데이터 시트보기 (PDF) - Linear Technology
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LT5571 Datasheet PDF : 16 Pages
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APPLICATIONS INFORMATION
RF
VCC = 5V
LT5571
C
BALUN
LOMI
FROM
Q-CHANNEL
LOPI
LT5571
BBPI
VCM = 0.5V
BBMI
1.8pF
1.8pF
GND
5571 F01
Figure 1. Simplified Circuit Schematic of the LT5571 (Only I-Half is Drawn)
50Ω
0.5VDC
–+ 1VDC
50Ω
GENERATOR
50Ω
0.5005VDC
–+ 1VDC
50Ω
EXTERNAL
GENERATOR
LOAD
LT5571
20µADC
5571 F02
Figure 2. DC Voltage Levels for a Generator Programmed at 0.5VDC for a 50Ω Load Without and with the LT5571 as a Load
MAX RF
+5.8dBm
VCC
5V
LT5571
C
BALUN
LOMI
FROM
Q-CHANNEL
LOPI
0mA TO 20mA
L1A
L2A
0.5VDC BBPI
R1A
R2A
100Ω
100Ω
DAC
C1
C2
C3
R1B
R2B
100Ω L1B
L2B
100Ω
1.8pF
1.8pF
20mA TO 0mA
0.5VDC BBMI
GND
GND
5571 F03
Figure 3. LT5571 Baseband Interface with 5th Order Filter and 0.5VCM DAC (Only I Channel is Shown)
5571f
9
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