CC400

SWRS050

Page 2 of 32

Table of Contents

1.

ABSOLUTE MAXIMUM RATINGS ................................................................................ 4

2.

OPERATING CONDITIONS........................................................................................... 4

3.

ELECTRICAL SPECIFICATIONS.................................................................................. 4

4.

GENERAL CHARACTERISTICS................................................................................... 5

5.

RF RECEIVE SECTION ................................................................................................. 5

6.

RF TRANSMIT SECTION .............................................................................................. 6

7.

IF SECTION.................................................................................................................... 6

8.

FREQUENCY SYNTHESISER SECTION...................................................................... 7

9.

DC CHARACTERISTICS ............................................................................................... 7

10.

PIN ASSIGNMENT......................................................................................................... 8

11.

CIRCUIT DESCRIPTION................................................................................................ 9

12.

CONFIGURATION OVERVIEW................................................................................... 10

13.

CONFIGURATION SOFTWARE.................................................................................. 10

14.

3-WIRE SERIAL INTERFACE ..................................................................................... 11

15.

MICROCONTROLLER INTERFACE ........................................................................... 13

15.1.

CONNECTING THE MICROCONTROLLER ............................................................ 13

15.2.

DATA TRANSMISSION ............................................................................................ 13

15.3.

DATA RECEPTION................................................................................................... 13

16.

APPLICATION CIRCUIT.............................................................................................. 14

16.1.

INPUT / OUTPUT MATCHING ................................................................................. 14

16.2.

SYNTHESIZER LOOP FILTER AND VCO TANK .................................................... 14

16.3.

ADDITIONAL FILTERING......................................................................................... 14

16.4.

VOLTAGE SUPPLY DECOUPLING ......................................................................... 14

17.

RECEIVER SENSITIVITY ............................................................................................ 15

18.

OUTPUT POWER ........................................................................................................ 16

19.

INPUT / OUTPUT MATCHING..................................................................................... 16

20.

OPTIONAL LC FILTER................................................................................................ 17

21.

CRYSTAL OSCILLATOR ............................................................................................ 17

22.

LOOP FILTER .............................................................................................................. 18

23.

BLOCKING................................................................................................................... 18

24.

PLL LOCK INDICATOR............................................................................................... 19

25.

ANTENNA CONSIDERATIONS................................................................................... 19

26.

SYSTEM CONSIDERATIONS AND GUIDELINES ..................................................... 20

26.1.

LOW-COST SYSTEMS............................................................................................. 20

26.2.

BATTERY OPERATED SYSTEMS .......................................................................... 20

26.3.

NARROW BAND SYSTEMS .................................................................................... 20

26.4.

HIGH RELIABILITY SYSTEMS ................................................................................ 20

26.5.

SPREAD SPECTRUM FREQUENCY HOPPING SYSTEMS .................................. 20

27.

DEMODULATOR PRECHARGING FOR REDUCED TURN-ON TIME ...................... 21

28.

PCB LAYOUT RECOMMENDATIONS........................................................................ 22