CC1020EMK-433 Datasheet, PDF(20/92 Page) Texas Instruments – Low-Power RF Transceiver for Narrowband Systems

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CC1020EMK-433 Datasheet, PDF (20/92 Pages) Texas Instruments – Low-Power RF Transceiver for Narrowband Systems

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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.

CC1020

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.

AVDD=3V

DVDD=3V

1 PCLK

2 PDI

3 PDO

4 DGND

5 DVDD

6 DGND

7 DCLK

8 DIO

CC1020

C7 R3 AVDD=3V

VC 24

AVDD 23

AVDD 22

RF_OUT 21

AVDD 20

RF_IN 19

AVDD 18

R_BIAS 17

R10

L2 C60

Monopole

antenna

(50 Ohm)

AVDD=3V

LC Filter

C1 T/R Switch

XTAL

AVDD=3V

Figure 4. Alternative application circuit (power supply decoupling not shown)

SWRS046F

Page 20 of 89

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