Texas Instruments CC1000PP Manuale utente

SWRU060 Page 1 of 11

User Manual

Rev. 1.22

CC1000PP Plug and Play Module

SWRU060 Page 2 of 11

Table of contents

TABLE OF CONTENTS............................................................................................................ 2

INTRODUCTION ....................................................................................................................... 3

TYPICAL PERFORMANCE...................................................................................................... 3

MECHANICAL DIMENSIONS AND COMPONENT PLACEMENT ......................................... 4

CIRCUIT DIAGRAM.................................................................................................................. 4

LAYOUT .................................................................................................................................... 8

ANTENNAS............................................................................................................................... 8

BILL OF MATERIALS...............................................................................................................8

BILL OF MATERIALS,CC1000PP-433........................................................................................ 9

BILL OF MATERIALS,CC1000PP-868...................................................................................... 10

SWRU060 Page 3 of 11

Introduction

The CC1000 is a very flexible and feature-rich single-chip very low-power RF transceiver.

Chipcon has designed the CC1000PP plug-and-play module to serve as a reference layout

and enable very quick prototyping of an RF system.

The tiny CC1000PP module (28x20 mm) contains all RF components required for proper

operation. This includes all the components mentioned in the CC1000 application circuit (see

datasheet for details), as well as a reference crystal and a LC output filter. The layout is

based on a standard, inexpensive 2-layer 1.6mm thick FR-4 PCB process, and has been

carefully optimised by Chipcon. Components are mounted on one side only, the component

side is used for signal routing, and the “solder” (reverse) side is used for a ground plane.

The CC1000PP layout can easily be used as a reference layout by importing it into a PCB

CAD program. Chipcon provides the layout in the industry-standard Gerber format. To

download the files, please visit the Chipcon web site.

As the CC1000PP module contains only the components required for operation, the layout

does not require major modifications when used to make a custom PCB, the user can merely

delete the connector pins at each end of the module. But it is very important that the

component placement, routing and vias are not altered if the same performance is to be

achieved.

If a four layer PCB is to be used, either the two top layers should be used for the RF part, or

layer 1 and 4. Layer 4 should then be the ground plane and layers 2 and 3 should be masked

off.

In a ready-built form, the CC1000PP is ideal for quick prototyping. The module may be

connected to a prototyping board or PCB containing the rest of the system. The CC1000 can

in this way be tested in a complete system without having to create a custom RF PCB layout.

Full documentation is provided for this module, including schematics and PCB layout. This

information can be downloaded from Chipcon’s web site.

Typical performance

The table below shows typical performance at 3 V / 25°C.

CC1000PP-433 CC1000PP-868Parameter

433 MHz 868 MHz 915 MHz

Unit

Sensitivity, 2.4 kBaud -111 -107 -105 dBm

Output power, max 8 2.5 0.5 dBm

RF frequency accuracy ±10 ±10 ±10 ppm

LO leakage -68 -62 -59 dBm

2nd harmonic <-36 <-30 <-40 dBc dBm

3rd harmonic <-30 <-30 <-40 dBc dBm

Current consumption, TX 24 23 23 mA

Current consumption, RX 9.7 11.7 11.7 mA

Current consumption, PD 100 100 100 nA

SWRU060 Page 4 of 11

Mechanical dimensions and component placement

The CC1000PP module measures 28x20mm, and has been designed for a two-sided 1.6mm

thick PCB using industry-standard FR-4 board material. Components are mounted on only

one side, and the result is a very small, inexpensive module that can satisfy regulation

requirements.

On each end of the board are connectors for interfacing the module to an external system. An

external antenna, and a 2.1-3.6V power supply should be connected to the top connector

(P2). The RSSI/IF signal can also be accessed via this connector. The lower connector (P1)

can be used to connect an external micro-controller to the data- and configuration interface of

the CC1000.

Figure 1. Mechanical drawing of CC1000PP module (not to scale)

To ensure optimum RF performance, an external antenna should be soldered directly to the

antenna terminals, or a 50 Ohm microstrip line should be used from the antenna terminal to

the external antenna connector. For applications not demanding optimum RF performance, a

pin-row connector may be used to connect the antenna signal to another PCB, but be aware

that this can lead to non-optimal sensitivity and output power, and that measurements using

this arrangement should not be used to characterise the RF performance of CC1000. For

more information on antennas, please see Chipcon application note AN003.

Circuit diagram

The circuit diagram of the CC1000PP is shown below. There are two versions of the

CC1000PP module, the CC1000PP-433 for 433 MHz operation, and the CC1000PP-868 for

operation in the 868 MHz and 902-928 MHz bands. Since the 868 version covers both the

European 868 MHz band and the US 902-928 MHz band, one system can be used in both

Europe and the US using the same hardware, changing the frequency by software control.

The circuit is similar to the application circuit shown in the CC1000 data sheet, with an added

LC filter to reduce emitted harmonics.

SWRU060 Page 5 of 11

The value of the matching components, the VCO inductor and the LC filter will depend on the

operating frequency. Bills of materials are supplied for both versions. For operating

frequencies other than those listed here, please use the latest version of SmartRF®Studio to

calculate the component values.

Pinouts for the connectors are given in the table below. The position of pin number 1 is

indicated on the top silkscreen of the PCB. An abbreviated description of the pin functions of

P1 is also printed on the silkscreen.

P1 P2

Pin Function Pin Function

1 PALE 1 GND

2 PDATA 2 ANTENNA

3 PCLK 3 GND

4 DCLK 4 VDD (2.1 – 3.6 V)

5 DIO 5 RSSI / IF

6 CHP_OUT / LOCK 6 GND

Table 1. Connector pinouts

SWRU060 Page 6 of 11

Figure 2. Schematic for 433 MHz version

SWRU060 Page 7 of 11

Figure 3. Schematic for 868/915 MHz version

SWRU060 Page 8 of 11

Layout

RF circuits working at high frequencies are very sensitive to the physical layout of the PCB.

Chipcon has carefully optimised the layout of the CC1000PP in order to provide good RF

performance. Chipcon strongly recommends that you use this layout as it is, and that you do

not attempt to modify it.

LO leakage is a critical parameter. To meet the ETSI requirement of –57 dBm, coupling from

the VCO to the antenna or the matching network must be carefully controlled. The VCO

inductor must be of the specified type and be mounted with the correct alignment if LO

leakage is to meet specifications. The L101 VCO inductor should be oriented with the thick

white stripe facing the crystal. To prevent coupling via the power supply, the specified

decoupling capacitors must be mounted as shown.

Figure 4. Top and bottom PCB layout, top silkscreen

Antennas

The CC1000PP can be used together with any type of single-sided antenna. Loop antennas

can also be used by grounding one side. If the antenna’s impedance is not close to 50 ohms,

matching components should be used to match it to 50 ohms. A quarter-wave wire antenna

can be used directly by removing pins 1, 2 and 3 from P2 and soldering in a piece of wire of

the correct length (one quarter wavelength).

Frequency ¼ wavelength

433 MHz 16.4 cm

868 MHz 8.2 cm

915 MHz 7.8 cm

Table 2: 1/4 wavelength for common frequencies

For more information about antennas, please see application note AN003.

Bill of materials

The CC1000 is designed to be used together with low cost passive components. The

components specified for the CC1000PP are the same as those listed in the data sheet. The

only critical component is the VCO inductor, which must be the exact type listed in order for

LO leakage to meet specifications. All other capacitors and inductors are non-critical, and any

manufacturer or type may be used as long as they match the specifications in the component

list. The boards manufactured by Chipcon uses Coilcraft HQ-series inductors, some of the

inductor values may not be available from all manufacturers. Substituting nearby values may

be possible.

SWRU060 Page 9 of 11

Bill of materials, CC1000PP-433

CC1000PP-433

Reference Description Value /

tolerance

Part

C1 Capacitor, tantal 3.3µF C_3U3_TAN_B

C6 Capacitor 0603 33nF, 10% C_33N_0603_X7R_K_25

C10 Capacitor 0603 12pF, 5% C_12P_0603_NP0_J_50

C11 Capacitor 0603 220pF, 5% C_220P_0603_NP0_J_50

C12 Capacitor 0603 1nF, 10% C_1N0_0603_X7R_K_50

C13 Capacitor 0603, general No Not Mount

C14 Capacitor 0603 68pF, 5% C_68P_0603_NP0_J_50

C31 Capacitor 0603 15pF, 5% C_15P_0603_NP0_J_50

C41 Capacitor 0603 8.2pF,

±0.25pF

C_8P2_0603_NP0_C_50

C42 Capacitor 0603 5.6pF,

±0.25pF

C_5P2_0603_NP0_C_50

C71 Capacitor 0603 22pF, 5% C_22P_0603_NP0_J_50

C72 Capacitor 0603 15pF, 5% C_15P_0603_NP0_J_50

C171 Capacitor 0603 18pF, 5% C_18P_0603_NP0_J_50

C181 Capacitor 0603 22pF, 5% C_22P_0603_NP0_J_50

C210 Capacitor 0603 1.0nF, 10% C_1N0_0603_X7R_K_50

C281 Capacitor 0603 1.0nF, 10% C_1N0_0603_X7R_K_50

L32 Inductor 0805 68nH, 5% L_68N_0805_J

L41 Inductor 0805 6.2nH, 5% L_6N2_0805_J

L71 Inductor 0805 10nH, 5% L_10N_0805_J

L101 Inductor 0805 33nH, 5% L_33N_0805_J KOA

KL732ATE33NJ

L210 EMI filter bead BLM18HG102SN1D, Murata

P1 Pin-row connector CON6_MALE

P2 Pin-row connector CON6_MALE

R131 Resistor 0603 82kΩ, 1% R_82K_0603_F

R281 Resistor 0603 27kΩ, 2% R_27K_0603_G

U1 Single chip transceiver CC1000

X1 Crystal, HC49-SMD X14.7456MHz 10/10/10/16,

(16pF load)

SWRU060 Page 10 of 11

Bill of materials, CC1000PP-868

CC1000PP-868

Reference Description Value Part

C1 Capacitor, tantal 3.3µF C_3U3_TAN_B

C6 Capacitor 0603 33nF, 10% C_33N_0603_X7R_K_25

C10 Capacitor 0603 12pF, 5% C_12P_0603_NP0_J_50

C11 Capacitor 0603 Do not mount

C12 Capacitor 0603 1nF, 10% C_1N0_0603_X7R_K_50

C13 Capacitor 0603 330pF, 5% C_330P_0603_NP0_J_50

C14 Capacitor 0603 8.2pF, ±0.25pF C_8P2_0603_NP0_C_50

C31 Capacitor 0603 10pF, 5% C_10P_0603_NP0_J_50

C41 Capacitor 0603 Do not mount

C42 Capacitor 0603 4.7pF, ±0.25pF C_4P7_0603_NP0_C_50

C71 Capacitor 0603 8.2pF, ±0.25pF C_8P2_0603_NP0_C_50

C72 Capacitor 0603 6.8pF, ±0.25pF C_6P8_0603_NP0_C_50

C171 Capacitor 0603 18pF, 5% C_18P_0603_NP0_J_50

C181 Capacitor 0603 22pF, 5% C_22P_0603_NP0_J_50

C210 Capacitor 0603 Do not mount

C281 Capacitor 0603 1nF, 10% C_1N0_0603_X7R_K_50

L32 Inductor 0805 120nF, 5% L_120N_0805_J

L41 Inductor 0805 2.5nH, 5% L_2N5_0805_J

L71 Inductor 0805 5.6nH, 5% L_5N6_0805_J

L101 Inductor 0805 4.7nH, 5% L_4N7_0805_J, KOA

KL732ATE4N7C

L210 EMI filter bead BLM18HG102SN1D, Murata

P1 Pin-row connector CON6_MALE

P2 Pin-row connector CON6_MALE

R131 Resistor 0603 82kΩ, 1% R_82K_0603_F

R281 Resistor 0603 27kΩ, 2% R_27K_0603_G

U1 Single chip

transceiver

CC1000

X1 Crystal, HC49-SMD X14.7456MHz 10/10/10/16,

(16pF load)

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