HFA3925 Просмотр технического описания (PDF) - Intersil
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HFA3925 Datasheet PDF : 9 Pages
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HFA3925
Typical Performance Curves (Continued)
Transmit/Receive Switch Performance NOTE: All data measured with VDD TR = +5V, TA = 25oC.
0
-5
0
-1
-10
-2
-15
-3
-20
-4
-25
-5
-30
2.0
2.2
2.4
2.6
2.8
3.0
FREQUENCY (GHz)
FIGURE 13. RECEIVE MODE T/R INSERTION LOSS/ISOLATION
-5
-10
INPUT
-15
OUTPUT
-20
2.0
2.2
2.4
2.6
2.8
3.0
FREQUENCY (GHz)
FIGURE 14. RECEIVE MODE T/R SWITCH MATCH
Typical Application Example
1
2
3
4
5
C25
6
RX OUT
(50Ω TRANSMISSION LINE)
7
VG2 (-)
8
R3 R6 C11
9
10
VDD1 (+)
11
C22
C12
C5
12
13
VG1 (-)
14
R2
R5
C13
C8
C21
VDD (T/R ANT)
28
T/R CNTRL
27
C7
C20
26
25
RF OUT
24
C24
(50Ω TRANSMISSION LINE)
23
VDD3 (+)
22
C4
C16 C19
21
20
19
VDD2 (+)
C3
C15 C18
18
17
VG3 (-)
16
C14
R4
R1
15
RF IN
C23 (50Ω TRANSMISSION LINE)
EXTERNAL CIRCUITRY PARTS LIST
LABEL
VALUE
PURPOSE
C3-C5, C7, C8
22pF
Bypass (GHz)
C23-C24
22pF
DC Block
C11-C16
1000pF
Bypass (MHz)
C18-C22
0.01µF
Bypass (kHz)
R1, R6
R3, R5
1.5kΩ
5kΩ
FET Gate Divider
Network
R2
12kΩ
R4
1kΩ
NOTE: All off-chip components are low cost surface mount components
obtainable from multiple sources. (0.020in x 0.040in or 0.030in x 0.050in.)
2-185
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