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CC1021-RTR1 Datasheet(PDF) 20 Page - Texas Instruments

No. de pieza CC1021-RTR1
Descripción Electrónicos  Single Chip Low Power RF Transceiver for Narrowband Systems
PDF  92 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

CC1021-RTR1 Datasheet(HTML) 20 Page - Texas Instruments

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CC1021
SWRS045
Page 20 of 91
The LC filter in Figure 3 is inserted in the
TX path only. The filter will reduce the
emission of harmonics and the spurious
emissions in the TX path. An alternative is
to insert the LC filter between the antenna
and the T/R switch as shown in Figure 4.
The filter will reduce the emission of
harmonics and the spurious emissions in
the TX path as well as increase the
receiver selectivity. The sensitivity will be
slightly reduced due to the insertion loss of
the LC filter.
1
PCLK
PDI
PDO
DGND
DGND
DCLK
DIO
DVDD
2
3
4
6
5
7
8
CC1021
24
VC
AVDD
AVDD
RF_OUT
RF_IN
AVDD
R_BIAS
AVDD
23
22
21
19
20
18
17
C5
C4
XTAL
LC Filter
Monopole
antenna
(50 Ohm)
L2
C3
AVDD=3V
L1
C1
R1
AVDD=3V
AVDD=3V
DVDD=3V
DVDD=3V
AVDD=3V
C7
R3
C8
C6
R2
AVDD=3V
T/R Switch
C60
R10
1
PCLK
PDI
PDO
DGND
DGND
DCLK
DIO
DVDD
2
3
4
6
5
7
8
CC1021
24
VC
AVDD
AVDD
RF_OUT
RF_IN
AVDD
R_BIAS
AVDD
23
22
21
19
20
18
17
C5
C5
C4
C4
XTAL
XTAL
LC Filter
LC Filter
Monopole
antenna
(50 Ohm)
L2
C3
AVDD=3V
L1
C1
R1
AVDD=3V
AVDD=3V
DVDD=3V
DVDD=3V
AVDD=3V
C7
R3
C8
C6
R2
AVDD=3V
T/R Switch
C60
R10
Figure 4. Alternative application circuit (power supply decoupling not shown)



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