CC1000

SWRS048A Page 10 of 55

6. Application Circuit

Very few external components are

required for the operation of

CC1000

. A

typical application circuit is shown in

Figure 2. Component values are shown in

Table 1.

6.1 Input / output matching

C31/L32 is the input match for the

receiver. L32 is also a DC choke for

biasing. C41, L41 and C42 are used to

match the transmitter to 50 Ω. An internal

T/R switch circuit makes it possible to

connect the input and output together and

match the

CC1000

to 50 Ω in both RX and

TX mode. See “Input/output matching”

p.31 for details.

6.2 VCO inductor

The VCO is completely integrated except

for the inductor L101.

Component values for the matching

network and VCO inductor are easily

calculated using the SmartRF® Studio

software.

6.3 Additional filtering

Additional external components (e.g. RF

LC or SAW-filter) may be used in order to

improve the performance in specific

applications. See also “Optional LC filter”

p.36 for further information.

6.4 Power supply decoupling

Power supply decoupling and filtering

must be used (not shown in the

application circuit). The placement and

size of the decoupling capacitors and the

power supply filtering are very important to

achieve the optimum performance.

Chipcon provides reference designs

(CC1000PP and CC1000uCSP_EM) that

should be followed very closely.

Figure 2. Typical

CC1000

application circuit (power supply decoupling not shown)

CC1000

SWRS048A Page 11 of 55

CC1000 TSSOP package

Item 315 MHz 433 MHz 868 MHz 915 MHz

C31 8.2 pF, 5%, C0G, 0603 15 pF, 5%, C0G, 0603 10 pF, 5%, C0G, 0603 10 pF, 5%, C0G, 0603

C41 2.2 pF, 5%, C0G, 0603 8.2 pF, 5%, C0G, 0603 Not used Not used

C42 5.6 pF, 5%, C0G, 0603 5.6 pF, 5%, C0G, 0603 4.7 pF, 5%, C0G, 0603 4.7 pF, 5%, C0G, 0603

C171 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603

C181 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603 18 pF, 5%, C0G, 0603

L32 39 nH, 10%, 0805

(Coilcraft 0805CS-390XKBC)

68 nH, 10%, 0805

(Coilcraft 0805CS-680XKBC)

120 nH, 10%, 0805

(Coilcraft 0805CS-121XKBC)

120 nH, 10%, 0805

(Coilcraft 0805CS-121XKBC)

L41 20 nH, 10%, 0805

(Coilcraft 0805HQ-

20NXKBC)

6.2 nH, 10%, 0805

(Coilcraft 0805HQ-

6N2XKBC)

2.5 nH, 10%, 0805

(Coilcraft 0805HQ-

2N5XKBC)

2.5 nH, 10%, 0805

(Coilcraft 0805HQ-

2N5XKBC)

L101 56 nH, 5%, 0805

(Koa KL732ATE56NJ)

33 nH, 5%, 0805

(Koa KL732ATE33NJ)

4.7 nH, 5%, 0805

(Koa KL732ATE4N7C)

4.7 nH, 5%, 0805

(Koa KL732ATE4N7C)

R131

82 kΩ, 1%, 0603 82 kΩ, 1%, 0603 82 kΩ, 1%, 0603 82 kΩ, 1%, 0603

XTAL 14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

CC1000 UltraCSP™ package

Item 315 MHz 433 MHz 868 MHz 915 MHz

C31 8.2 pF, 5%, C0G, 0402 15 pF, 5%, C0G, 0402 10 pF, 5%, C0G, 0402 10 pF, 5%, C0G, 0402

C41 Not used Not used Not used Not used

C42 4.7 pF, 5%, C0G, 0402 4.7 pF, 5%, C0G, 0402 6.8 pF, 5%, C0G, 0402 6.8 pF, 5%, C0G, 0402

C171 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402

C181 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402 18 pF, 5%, C0G, 0402

L32 39 nH, 5%, 0402

(Ceramic multilayer)

68 nH, 5%, 0402

(Ceramic multilayer)

120 nH, 5%, 0402

(Ceramic multilayer)

120 nH, 5%, 0402

(Ceramic multilayer)

L41 22 nH, 5%, 0402

(Ceramic multilayer)

15 nH, 5%, 0402

(Ceramic multilayer)

2.7 nH, 5%, 0402

(Ceramic multilayer)

2.7 nH, 5%, 0402

(Ceramic multilayer)

L101 56 nH, 5%, 0402

(Thin film inductor)

33 nH, 5%, 0402

(Thin film inductor)

7.5 nH, 5%, 0402

(Thin film inductor)

7.5 nH, 5%, 0402

(Thin film inductor)

R131

82 kΩ, 1%, 0402 82 kΩ, 1%, 0402 82 kΩ, 1%, 0402 82 kΩ, 1%, 0402

XTAL 14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

14.7456 MHz crystal,

16 pF load

Note: Items shaded are different for different frequencies

Table 1. Bill of materials for the application circuit

Note that the component values for

868/915 MHz can be the same. However,

it is important the layout is optimised for

the selected VCO inductor in order to

centre the tuning range around the

operating frequency to account for

inductor tolerance. The VCO inductor

must be placed very close and

symmetrical with respect to the pins (L1

and L2).

Chipcon provide reference layouts that

should be followed very closely in order to

achieve the best performance. The

reference design can be downloaded from

the Chipcon website.

CC1000

SWRS048A Page 12 of 55

7. Configuration Overview

CC1000

can be configured to achieve the

best performance for different

applications. Through the programmable

configuration registers the following key

parameters can be programmed:

• Receive / transmit mode

• RF output power

• Frequency synthesiser key

parameters: RF output frequency, FSK

frequency separation (deviation),

crystal oscillator reference frequency

• Power-down / power-up mode

• Crystal oscillator power-up / power

down

• Data rate and data format (NRZ,

Manchester coded or UART interface)

• Synthesiser lock indicator mode

• Optional RSSI or external IF

8. Configuration Software

Chipcon provides users of

CC1000

with a

software program, SmartRF® Studio

(Windows interface) that generates all

necessary

CC1000

configuration data

based on the user’s selections of various

parameters. These hexadecimal numbers

will then be the necessary input to the

microcontroller for the configuration of

CC1000

. In addition the program will

provide the user with the component

values needed for the input/output

matching circuit and the VCO inductor.

Figure 3 shows the user interface of the

CC1000

configuration software.

Figure 3. SmartRF® Studio user interface

Part #	CC1000-RTB1
Description	RF Transceiver FSK 3V 28-PinTSSOP Tube - Rail/Tube
Category	IC
Availability	In Stock
Qty	143

Qty	Price
1 - 15	$9.51472
16 - 39	$7.56853
40 - 77	$7.13604
78 - 116	$6.63147
117 +	$5.91066

CC1000-RTB1

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Technical Document