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Texas Instruments CC900DB User Manual Download Page 19

 

                                                SWRU064      

19

4.5

 

Bill of materials 

CC900DB 

Reference Description 

Value 

Part 

B1 

Battery 

3.6V 

LS14250 3PF, Lithium Thionyl Cloride, SAFT 

C1  

Capacitor, tantal  

3.3

µ

F 

C_3U3_TAN_B                    

C2 

Capacitor 0603  

33nF 

C_33N_0603_X7R_K_25            

C3 

Capacitor 0603  

220pF 

C_220P_0603_NP0_G_50           

C10  

Capacitor 0603  

1nF 

C_1N0_0603_X7R_K_50            

C11 

Capacitor 0603  

33nF 

C_33N_0603_X7R_K_25            

C12  

Capacitor 1206 

1nF 

C_1N0_0603_X7R_K_50 

C24  

Capacitor 0603  

220pF 

C_220P_0603_NP0_G_50           

C25  

Capacitor 0603                12pF 

C_12P_0603_NP0_G_50           

C51  

Capacitor 0603  

220pF 

C_220P_0603_NP0_G_50           

C52  

Capacitor 0603  

8p2F 

C_8P2_0603_NP0_C_50 

C53  

Capacitor 0603  

8p2F 

C_8P2_0603_NP0_C_50 

C91  

Capacitor 0603  

3.9pF 

C_3P9_0603_NP0_C_50 

C92  

Capacitor 0603  

3.9pF 

C_3P9_0603_NP0_C_50 

C93  

Capacitor 0603  

1pF 

C_1P0_0603_NP0_C_50 

C121 

Capacitor 0603  

680pF 

C_680P_0603_NP0_J_50 

C122  

Capacitor 0603  

33pF 

C_33P_0603_NP0_J_50 

C123  

Capacitor 0603  

6.8pF 

C_6P8_0603_NP0_C_50 

C151  

Capacitor 0603  

15pF 

C_15P_0603_NP0_G_50            

C161  

Capacitor 0603  

15pF 

C_15P_0603_NP0_G_50            

C210  

Capacitor 0603  

1nF 

C_1N0_0603_X7R_K_50            

C211  

Capacitor 0603 

33nF 

C_33N_0603_X7R_K_25            

D1 LED 

Red  CL150, 

Citizen 

D2  

Varactor diode  

 

BBY53-03W                       

H1 Shield 

can 

 

SHIELD_CAN_400X400 

L7 Capacitor 

0805  N.A   

L8 Resistor 

0805  0 

Ω

 

R_0R_0805 

L51  

Inductor 0805  

8.2nH 

L_8N2_0805_J 

L52  

Inductor 0805  

3.3nH 

L_3N3_0805_D 

L61  

Inductor 0805  

100nH 

L_100N_0805_J 

L91  

Inductor 0805  

3.3nH 

L_3N3_0805_D 

L210  

EMI filter bead 

 

BLM11A102S, Murata                     

R1 Resistor 

0603  10k

Ω

 

R_10K_0603_G 

R2 Resistor 

0603  1k

Ω

 

R_1K0_0603_J 

R3 Resistor 

0603  1k

Ω

 

R_1K0_0603_J 

R4 

Resistor 0603  

0

Ω

 

R_0R_0603                         

R5 Resistor 

0603  1k

Ω

 

R_1K0_0603_J 

R6 Resistor 

0603  470

Ω

 

R_470_0603_J 

R7 Resistor 

0603  10k

Ω

 

R_10K_0603_G 

R121  

Resistor 0603  

47k

Ω

 

R_47K_0603_G                   

R122  

Resistor 0603  

220k

Ω

 

R_220K_0603_J                  

R123  

Resistor 0603  

22k

Ω

 

R_22K_0603_G                   

S1 

Push button 

 

PUSH BUTTON 

S2 

Push button 

 

PUSH BUTTON 

U1            Single chip transceiver   

CC900                          

U2 Micro-controller  

ATtiny12L-4SC 

X1            Crystal, HC-49-SMD 

 

X_12.000000 MHz, 10/10/10 tol., 12pF load  

Summary of Contents for CC900DB

Page 1: ...SWRU064 User Manual CC900DB Demonstration Board Rev 2 0...

Page 2: ...10 3 5 DATA RECEPTION 11 3 6 DATA DECODER ALGORITHM 11 4 DEMONSTRATION BOARD HARDWARE DESCRIPTION 12 4 1 RF SECTION 12 4 1 1 The loop filter 12 4 1 2 IF filter 12 4 1 3 The modulation input output 12...

Page 3: ...from the receiver to the initial transmitter and shown on its LED as an acknowledge The modules will enter sleep mode after being left without operation for one minute Technical features 10 dBm RF po...

Page 4: ...t time The LED will then start blinking with a period of approximately 1 second This is the heart beat that shows the module is operating During the short time the LED is lit the module is in active r...

Page 5: ...em parameters X tal frequency 12 000000 MHz X tal accuracy 25 ppm RF frequency 868 300 MHz IF stage 200 kHz Frequency separation 40 kHz Data rate 1 2 kbps Power amplifier class Class AB RF output powe...

Page 6: ...G CB6C H E072 TX mode Frame Addr Data hex A 086A B 2B0B C 4841 D 608F E 8914 F BA00 G CB6C H E072 PD osc on mode Frame Addr Data hex A 186A B 2B0B C 4841 D 6033 E 8900 F BA00 G CB6C H E072 PD osc off...

Page 7: ...ROM mapping The CC900 configuration data are stored in the micro controller EEPROM The following map shows the data location To customise the module for a different frequency or power level the EEPROM...

Page 8: ...icro controller see below Receiver does not receive packet from closely located transmitter Use a Spectrum Analyser at 868 3 MHz to check the module during transmission Connect the analyser to the ext...

Page 9: ...to RX mode and the micro controller starts searching for a preamble The micro controller reads two data bits if these are not Manchester coded 1 s the CC900 is set to power down mode again The LED is...

Page 10: ...ow Preamble SOF ID TYPE DATA1 DATA2 DATA3 The figure below shows the symbol coding and an example of a packet with the pre amble data and SOF timing Preamble for 1 second SOF Data field ID TYPE DATA1...

Page 11: ...rithm The decoder algorithm implemented is based on oversampling Each bit is sampled 8 times and the data decision is based on a majority vote The use of oversampling makes the data decision more immu...

Page 12: ...and the data rate the speed we jump between these two frequencies 4 1 2 IF filter The Demonstration Board uses the internal 200kHz IF filter The 200kHz IF filter has a larger bandwidth than the 60 kHz...

Page 13: ...this type will drift with age less than 3ppm year often specified for 5ppm the first year if long product life is anticipated a higher accuracy crystal or one with low ageing should be used The loadin...

Page 14: ...2 2 Micro controller I O As the controller is packed in an 8 pin package it has room for only 5 external I O lines These are combined serving several functions in different operating modes The micro...

Page 15: ...reprogrammed an ATMEL AVR STK500 development board or an ATAVRISP in circuit programmer can also be used The programming interface uses 4 signal lines These four lines can be accessed at both the 10...

Page 16: ...SWRU064 16 4 3 Layout sketches Drawing not to scale...

Page 17: ...SWRU064 17...

Page 18: ...SWRU064 18 4 4 Circuit diagram...

Page 19: ...03 6 8pF C_6P8_0603_NP0_C_50 C151 Capacitor 0603 15pF C_15P_0603_NP0_G_50 C161 Capacitor 0603 15pF C_15P_0603_NP0_G_50 C210 Capacitor 0603 1nF C_1N0_0603_X7R_K_50 C211 Capacitor 0603 33nF C_33N_0603_X...

Page 20: ...nd a better antenna The Demonstrator Board can also be used as a prototype module when developing your own applications You may Reprogram the EEPROM configuration data for your own system parameters T...

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