HFA3925 데이터 시트보기 (PDF) - Intersil
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HFA3925 Datasheet PDF : 9 Pages
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HFA3925
Typical Application Diagram
PAPE STEP
0 TO +3.5V
PAPE
MMBT2222ALT1
MOTOROLA
SOT 23
4.7K 5K
VCC1
330
VCC2
Positive Supply, Single Stage 3 Adjustment Circuit
G2 S2 G1 S1
1000pF
5pF
RF1K49093
1 GND
2 GND
GND 28
HFA3925
VDD T/R 27
D2 D2 D1 D1
L8
BEAD
3 GND
4 GND
5 GND
T/R CTRL 26
RF OUT
25
GND 24
22pF
0.1µF
6 GND
7 GND
VDD3 23
GND 22
8
RX OUT
715
GND 21
9 VG2
GND 20
35
0.1µF
3.01K
10 GND
GND 19
HFA3424
LNA
500pF
RF OUT
15nH
VCC2
715
0.1µF
0.1µF
ICL7660SIBA
SUPER VOLTAGE
CONVERTER
+IN
-OUT
+ TO -V
CONVERTER
3.01K
11 VDD1
12 GND
13 GND
14 VG1
820Ω
- 4.7µF
+ TANTL
10K
1K
MMBT
2222
ALT1
MOTOROLA
VCC1 = +5V
VCC2 = +3.5V
+-
4.7µF TANTL
TRUTH TABLE
PAPE TR/CTRL MODE
Low (0)
High (1) Receive
High (1) Low (0)
Transmit
VDD2 18
VG3 17
GND 16
15
RF IN
0.1µF
22pF
RF IN
+3.5V
0V
+3.5V
0V
+5V
0V
POWER UP TIMING
PAPE
VCC2
TRANSMIT
ENABLED
RECEIVE
ENABLED
VCC1
25ms
MIN
2-186
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