Texas Instruments TRF4900, Руководство пользователя, Страница: 13 / 45

Schematics
2-2
2.1 Schematics
1000pF C10 DNP
10k
R6
TBD
R9
DNP
TBD
R10 DNP
R1
1
TBD DNP TBD R8 DNP
VCO_T
ANK
VCO_T
ANK
J2
1 2
SM
V1247−
079
V1
1 2
SM
V1247−
079
V2
SELECT
L2
FOR
CENTER
FREQUENCY
.
SELECT
C8,
C9
FOR
TUNING
RANGE.
TYPICAL
TUNING
RANGE
(Vcc=3.3V)
Vt:
0.5
T
O
3.0V
f:
845−965MHz
6.2k
R1
4700pF C1
NOTES:
1 2 3
DNP:
DO
NOT
PLACE
TBD:
T
O
BE
DETERMINED
SA
T
:
SELECT
A
T
T
EST
4.7pF C9
4.7pF C8
C6
DNP
10k
R5
JP
1
0
L2
10nH
LQW
1608
TP1
VCC1
0.1uF C3
R2
100k
470pF C2
LOCKDET
LDET
STDBY TXDA
T
A
MODE CLOCK DA
T
A
STROBE
3
PD_SET
2
PLL_VCC
1
PD_OUT1
4
VCO_T
A
NK1
5
VCO_T
A
NK2
6
PLL_GND
7
DIG_GND
8
CLOCK
9
DATA
10
STROBE
11
MODE
12
STDBY
13
NC
14 15
DIG_GND
16
XOSC1
17
XOSC2
18
DIG_VCC
19
GND
20
PA
_
V
C
C
21
PA
_
G
N
D
22
PA
_
O
U
T
23
LOCKDET
24
PD_OUT2
TRF4900
IC1
TX_OUT
TX_OUT
VCC1
J1
6.8nH L1 LQW
1608
VCC1
0.1uF C5
0.1uF C7
3.3pF
C4
100 R4
51 R3
FUNDAMENT
AL
MODE
INIT
IA
L
T
O
L
E
R
A
NCE
+
/−
7
P
P
M
ST
AB
OVER
TEMP
+/
−
2
0
PPM
TEMP
RANGE
−
40
T
O
+85
D
EG
C
1.5
−
10pF
C13 DNP SA
T
25.
6M
Hz
CQ1
SELECT
F
OR
OUTPUT
FREQUENCY
A
T
J1
1.0M
R7
10pF C12
10pF C1
1
R38 100k