CC1021 datasheet(2/94 Pages) TI

2 / 94 page

CC1021

SWRS045C

Page 2 of 87

Table of Contents

Abbreviations................................................................................................................ 4

Absolute Maximum Ratings......................................................................................... 5

Operating Conditions ................................................................................................... 5

Electrical Specifications .............................................................................................. 5

4.1.

RF Transmit Section ............................................................................................ 6

4.2.

RF Receive Section ............................................................................................. 8

4.3.

RSSI / Carrier Sense Section ............................................................................ 11

4.4.

IF Section........................................................................................................... 11

4.5.

Crystal Oscillator Section................................................................................... 12

4.6.

Frequency Synthesizer Section ......................................................................... 13

4.7.

Digital Inputs / Outputs....................................................................................... 14

4.8.

Current Consumption......................................................................................... 15

Pin Assignment........................................................................................................... 15

Circuit Description...................................................................................................... 17

Application Circuit...................................................................................................... 18

Configuration Overview ............................................................................................. 21

8.1.

Configuration Software ...................................................................................... 21

Microcontroller Interface............................................................................................ 22

9.1.

4-wire Serial Configuration Interface ................................................................. 23

9.2.

Signal Interface .................................................................................................. 25

10.

Data Rate Programming............................................................................................. 27

11.

Frequency Programming ........................................................................................... 28

11.1.

Dithering ......................................................................................................... 29

12.

Receiver ....................................................................................................................... 30

12.1.

IF Frequency .................................................................................................. 30

12.2.

Receiver Channel Filter Bandwidth................................................................ 30

12.3.

Demodulator, Bit Synchronizer and Data Decision........................................ 31

12.4.

Receiver Sensitivity versus Data Rate and Frequency Separation ............... 32

12.5.

RSSI ............................................................................................................... 33

12.6.

Image Rejection Calibration ........................................................................... 35

12.7.

Blocking and Selectivity ................................................................................. 36

12.8.

Linear IF Chain and AGC Settings................................................................. 38

12.9.

AGC Settling................................................................................................... 40

12.10.

Preamble Length and Sync Word .................................................................. 40

12.11.

Carrier Sense ................................................................................................. 41

12.12.

Automatic Power-up Sequencing................................................................... 41

12.13.

Automatic Frequency Control......................................................................... 42

12.14.

Digital FM ....................................................................................................... 43

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