LT5572 데이터 시트보기 (PDF) - Linear Technology
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LT5572 Datasheet PDF : 16 Pages
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APPLICATIO S I FOR ATIO
RF
VCC = 5V
LT5572
C
BALUN
LOMI
FROM
Q-CHANNEL
LOPI
LT5572
BBPI
VCM = 0.5V
BBMI
1.8pF
1.8pF
GND
5572 F01
Figure 1. Simplified Circuit Schematic of the LT5572 (Only I Channel is Drawn)
50Ω
–+ 1VDC
GENERATOR
0.5VDC
50Ω
50Ω
0.5005VDC
–+ 1VDC
50Ω
EXTERNAL
GENERATOR
LOAD
LT5572
20µADC
5572 F02
Figure 2. DC Voltage Levels for a Generator Programmed at 0.5VDC for a 50Ω Load Without and With the LT5572 as a Load
MAX RF
+6.2dBm
VCC
5V
LT5572
C
BALUN
LOMI
FROM
Q-CHANNEL
LOPI
0mA TO 20mA
DAC
0mA TO 20mA
L1A
R1A
100Ω
C1
R1B
100Ω L1B
L2A
0.5VDC BBPI
R2A
100Ω
C2
C3
R2B
L2B
100Ω
BBMI
1.8pF
1.8pF
GND
GND
5572 F03
Figure 3. LT5572 Baseband Interface with 5th Order Filter and 0.5VCM DAC (Only I Channel is Shown)
5572f
9
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