Texas Instruments CC1020 Manual de usuario

CC1020

Low-Power RF Transceiver for Narrowband Systems

Applications

•Narrowband low power UHF wireless

data transmitters and receivers with

channel spacing as low as 12.5 and 25

kHz

•402 / 424 / 426 / 429 / 433 / 447 / 449 /

469 / 868 and 915 MHz ISM/SRD

band systems

•AMR - Automatic Meter Reading

•Wireless alarm and security systems

•Home automation

•Low power telemetry

Product Description

CC1020

is a true single-chip UHF trans-

ceiver designed for very low power and

very low voltage wireless applications. The

circuit is mainly intended for the ISM

(Industrial, Scientific and Medical) and

SRD (Short Range Device) frequency

bands at 402, 424, 426, 429, 433, 447,

449, 469, 868 and 915 MHz, but can

easily be programmed for multi-channel

operation at other frequencies in the 402 -

470 and 804 - 940 MHz range.

The

CC1020

is especially suited for narrow-

band systems with channel spacings of

12.5 or 25 kHz complying with ARIB STD

T-67 and EN 300 220.

The

CC1020

main operating parameters

can be programmed via a serial bus, thus

making

CC1020

a very flexible and easy to

use transceiver.

In a typical system

CC1020

will be used

together with a microcontroller and a few

external passive components.

Features

•True single chip UHF RF transceiver

•Frequency range 402 MHz - 470 MHz

and 804 MHz - 940 MHz

•High sensitivity (up to -118 dBm for a

12.5 kHz channel)

•Programmable output power

•Low current consumption (RX: 19.9

mA)

•Low supply voltage (2.3 V to 3.6 V)

•No external IF filter needed

•Low-IF receiver

•Very few external components required

•Small size (QFN 32 package)

•Pb-free package

•Digital RSSI and carrier sense indicator

•Data rate up to 153.6 kBaud

•OOK, FSK and GFSK data modulation

•Integrated bit synchronizer

•Image rejection mixer

•Programmable frequency and AFC

make crystal temperature drift

compensation possible without TCXO

•Suitable for frequency hopping systems

•Suited for systems targeting

compliance with EN 300 220, FCC

CFR47 part 15 and ARIB STD T-67

•Development kit available

•Easy-to-use software for generating the

CC1020

configuration data

SWRS046B Page 1 of 91

CC1020

Table of Contents

1. Abbreviations................................................................................................................ 4

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

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

4. 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

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

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

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

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

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

9. 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................................................................. 37

12.9. AGC Settling................................................................................................... 38

12.10. Preamble Length and Sync Word .................................................................. 39

12.11. Carrier Sense ................................................................................................. 39

12.12. Automatic Power-up Sequencing................................................................... 40

12.13. Automatic Frequency Control......................................................................... 41

12.14. Digital FM ....................................................................................................... 42

SWRS046B Page 2 of 91

CC1020

13. Transmitter .................................................................................................................. 43

13.1. FSK Modulation Formats ............................................................................... 43

13.2. Output Power Programming........................................................................... 45

13.3. TX Data Latency............................................................................................. 46

13.4. Reducing Spurious Emission and Modulation Bandwidth.............................. 46

14. Input / Output Matching and Filtering....................................................................... 46

15. Frequency Synthesizer .............................................................................................. 50

15.1. VCO, Charge Pump and PLL Loop Filter....................................................... 50

15.2. VCO and PLL Self-Calibration ....................................................................... 51

15.3. PLL Turn-on Time versus Loop Filter Bandwidth........................................... 52

15.4. PLL Lock Time versus Loop Filter Bandwidth................................................ 53

16. VCO and LNA Current Control .................................................................................. 53

17. Power Management .................................................................................................... 54

18. On-Off Keying (OOK).................................................................................................. 57

19. Crystal Oscillator ........................................................................................................ 58

20. Built-in Test Pattern Generator ................................................................................. 59

21. Interrupt on Pin DCLK ................................................................................................ 60

21.1. Interrupt upon PLL Lock................................................................................. 60

21.2. Interrupt upon Received Signal Carrier Sense .............................................. 60

22. PA_EN and LNA_EN Digital Output Pins ................................................................. 61

22.1. Interfacing an External LNA or PA ................................................................. 61

22.2. General Purpose Output Control Pins............................................................ 61

22.3. PA_EN and LNA_EN Pin Drive...................................................................... 61

23. System Considerations and Guidelines................................................................... 62

24. PCB Layout Recommendations ................................................................................ 64

25. Antenna Considerations ............................................................................................ 65

26. Configuration Registers............................................................................................. 65

26.1. CC1020 Register Overview............................................................................ 66

27. Package Description (QFN 32) .................................................................................. 86

27.1. Package Marking............................................................................................ 87

27.2. Recommended PCB Footprint for Package (QFN 32)................................... 88

27.3. Package Thermal Properties.......................................................................... 88

27.4. Soldering Information ..................................................................................... 88

27.5. Plastic Tube Specification .............................................................................. 89

27.6. Carrier Tape and Reel Specification .............................................................. 89

28. Ordering Information.................................................................................................. 89

29. General Information.................................................................................................... 90

SWRS046B Page 3 of 91

CC1020

1. Abbreviations

ACP Adjacent Channel Power

ACR Adjacent Channel Rejection

ADC Analog-to-Digital Converter

AFC Automatic Frequency Control

AGC Automatic Gain Control

AMR Automatic Meter Reading

ASK Amplitude Shift Keying

BER Bit Error Rate

BOM Bill Of Materials

bps bits per second

BT Bandwidth-Time product (for GFSK)

ChBW Receiver Channel Filter Bandwidth

CW Continuous Wave

DAC Digital-to-Analog Converter

DNM Do Not Mount

ESR Equivalent Series Resistance

FHSS Frequency Hopping Spread Spectrum

FM Frequency Modulation

FS Frequency Synthesizer

FSK Frequency Shift Keying

GFSK Gaussian Frequency Shift Keying

IC Integrated Circuit

IF Intermediate Frequency

IP3 Third Order Intercept Point

ISM Industrial Scientific Medical

kbps kilo bits per second

LNA Low Noise Amplifier

LO Local Oscillator (in receive mode)

MCU Micro Controller Unit

NRZ Non Return to Zero

OOK On-Off Keying

PA Power Amplifier

PD Phase Detector / Power Down

PER Packet Error Rate

PCB Printed Circuit Board

PN9 Pseudo-random Bit Sequence (9-bit)

PLL Phase Locked Loop

PSEL Program Select

RF Radio Frequency

RSSI Received Signal Strength Indicator

RX Receive (mode)

SBW Signal Bandwidth

SPI Serial Peripheral Interface

SRD Short Range Device

TBD To Be Decided/Defined

T/R Transmit/Receive (switch)

TX Transmit (mode)

UHF Ultra High Frequency

VCO Voltage Controlled Oscillator

VGA Variable Gain Amplifier

XOSC Crystal oscillator

XTAL Crystal

SWRS046B Page 4 of 91

CC1020

2. Absolute Maximum Ratings

The absolute maximum ratings given Table 1 should under no circumstances be violated.

Stress exceeding one or more of the limiting values may cause permanent damage to the

device.

Parameter Min Max Unit Condition

Supply voltage, VDD -0.3 5.0 V All supply pins must have the

same voltage

Voltage on any pin -0.3 VDD+0.3, max 5.0 V

Input RF level 10 dBm

Storage temperature range -50 150 °C

Package body temperature 260 °C Norm: IPC/JEDEC J-STD-020D 1

Humidity non-condensing 5 85 %

ESD

(Human Body Model)

±1

±0.4

All pads except RF

RF Pads

Table 1. Absolute maximum ratings

1The reflow peak soldering temperature (body temperature) is specified according to

IPC/JEDEC J-STD_020D “Moisture/Reflow Sensitivity Classification for Nonhermetic Solid

State Surface Mount Devices”.

Caution! ESD sensitive device.

Precaution should be used when handling

the device in order to prevent permanent

damage.

3. Operating Conditions

The operating conditions for

CC 020

are listed in Table 2.

Parameter

Min Typ Max Unit Condition / Note

RF Frequency Range 402

804

470

940

MHz

Programmable in <300 Hz steps

Programmable in <600 Hz steps

Operating ambient temperature range

-40 85

°C

Supply voltage

2.3 3.0 3.6 V

The same supply voltage should

be used for digital (DVDD) and

analog (AVDD) power.

A 3.0 ±0.1 V supply is

recommended to meet the ARIB

STD T-67 selectivity and output

power tolerance requirements.

Table 2. Operating conditions

4. Electrical Specifications

Table 3 to Table 10 gives the

CC1020

electrical specifications. All measurements were

performed using the 2 layer PCB CC1020EMX reference design. This is the same test circuit

as shown in Figure 3. Temperature = 25°C, supply voltage = AVDD = DVDD = 3.0 V if

nothing else stated. Crystal frequency = 14.7456 MHz.

The electrical specifications given for 868 MHz are also applicable for the 902 - 928 MHz

frequency range.

SWRS046B Page 5 of 91

CC1020

4.1. RF Transmit Section

Parameter

Min Typ Max Unit Condition / Note

Transmit data rate

0.45

153.6 kBaud The data rate is programmable.

See section 10 on page 27 for

details.

NRZ or Manchester encoding can

be used. 153.6 kBaud equals

153.6 kbps using NRZ coding

and 76.8 kbps using Manchester

coding. See section 9.2 on page

25 for details

Minimum data rate for OOK is 2.4

kBaud

Binary FSK frequency separation

108

216

kHz

in 402 - 470 MHz range

in 804 - 940 MHz range

108/216 kHz is the maximum

guaranteed separation at 1.84

MHz reference frequency. Larger

separations can be achieved at

higher reference frequencies.

Output power

433 MHz

868 MHz

-20 to +10

-20 to +5

dBm

Delivered to 50 Ωsingle-ended

load. The output power is

programmable and should not be

programmed to exceed +10/+5

dBm at 433/868 MHz under any

operating conditions (refer to

CC1020 Errata Note 003). See

section 14 on page 46 for details.

Output power tolerance

-4

At maximum output power

At 2.3 V, +85oC

At 3.6 V, -40oC

Harmonics, radiated CW

2nd harmonic, 433 MHz, +10 dBm

3rd harmonic, 433 MHz, +10 dBm

2nd harmonic, 868 MHz, +5 dBm

3rd harmonic, 868 MHz, +5 dBm

-50

dBc

Harmonics are measured as

EIRP values according to EN 300

220. The antenna (SMAFF-433

and SMAFF-868 from R.W.

Badland) plays a part in

attenuating the harmonics.

Adjacent channel power (GFSK)

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

-46

-52

-49

dBc

For 12.5 kHz channel spacing

ACP is measured in a ±4.25 kHz

bandwidth at ±12.5 kHz offset.

Modulation: 2.4 kBaud NRZ PN9

sequence, ±2.025 kHz frequency

deviation.

For 25 kHz channel spacing ACP

is measured in a ±8.5 kHz

bandwidth at ±25 kHz offset.

Modulation: 4.8 kBaud NRZ PN9

sequence, ±2.475 kHz frequency

deviation.

SWRS046B Page 6 of 91

CC1020

Parameter

Min Typ Max Unit Condition / Note

Occupied bandwidth (99.5%,GFSK)

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

7.5

9.6

kHz

Bandwidth for 99.5% of total

average power.

Modulation for 12.5 channel

spacing: 2.4 kBaud NRZ PN9

sequence, ±2.025 kHz frequency

deviation.

Modulation for 25 kHz channel

spacing: 4.8 kBaud NRZ PN9

sequence, ±2.475 kHz frequency

deviation.

Modulation bandwidth, 868 MHz

19.2 kBaud, ±9.9 kHz frequency

deviation

38.4 kBaud, ±19.8 kHz frequency

deviation

106

kHz

Bandwidth where the power

envelope of modulation equals

-36 dBm. Spectrum analyzer

RBW = 1 kHz.

Spurious emission, radiated CW

47-74, 87.5-118,

174-230, 470-862 MHz

9 kHz - 1 GHz

1 - 4 GHz

-54

-36

-30

dBm

At maximum output power,

+10/+5 dBm at 433/868 MHz.

To comply with EN 300 220,

FCC CFR47 part 15 and ARIB

STD T-67 an external (antenna)

filter, as implemented in the

application circuit in Figure 25,

must be used and tailored to

each individual design to reduce

out-of-band spurious emission

levels.

Spurious emissions can be

measured as EIRP values

according to EN 300 220. The

antenna (SMAFF-433 and

SMAFF-868 from R.W. Badland)

plays a part in attenuating the

spurious emissions.

If the output power is increased

using an external PA, a filter must

be used to attenuate spurs below

862 MHz when operating in the

868 MHz frequency band in

Europe. Application Note AN036

CC1020/1021 Spurious Emission

presents and discusses a solution

that reduces the TX mode

spurious emission close to 862

MHz by increasing the REF_DIV

from 1 to 7.

Optimum load impedance

433 MHz

868 MHz

915 MHz

54 + j44

15 + j24

20 + j35

Ω

Transmit mode. For matching

details see section 14 on page

46.

Table 3. RF transmit parameters

SWRS046B Page 7 of 91

CC1020

4.2. RF Receive Section

Parameter

Min Typ Max Unit Condition / Note

Receiver Sensitivity, 433 MHz, FSK

12.5 kHz channel spacing, optimized

selectivity, ±2.025 kHz freq. deviation

12.5 kHz channel spacing, optimized

sensitivity, ±2.025 kHz freq. deviation

25 kHz channel spacing

500 kHz channel spacing

Receiver Sensitivity, 868 MHz, FSK

12.5 kHz channel spacing, ±2.475

kHz freq. deviation

25 kHz channel spacing

500 kHz channel spacing

-114

-118

-112

-96

-116

-111

-94

dBm

Sensitivity is measured with PN9

sequence at BER = 10-3

12.5 kHz channel spacing:

2.4 kBaud, Manchester coded

data.

25 kHz channel spacing:

4.8 kBaud, NRZ coded data,

±2.475 kHz frequency deviation.

500 kHz channel spacing:

153.6 kBaud, NRZ coded data,

±72 kHz frequency deviation.

See Table 19 and Table 20 for

typical sensitivity figures at other

data rates.

Receiver sensitivity, 433 MHz, OOK

2.4 kBaud

153.6 kBaud

Receiver sensitivity, 868 MHz, OOK

4.8 kBaud

153.6 kBaud

-116

-81

-107

-87

dBm

Sensitivity is measured with PN9

sequence at BER = 10-3

Manchester coded data.

See Table 27 for typical

sensitivity figures at other data

rates.

Saturation (maximum input level)

FSK and OOK

dBm

FSK: Manchester/NRZ coded

data

OOK: Manchester coded data

BER = 10-3

System noise bandwidth 9.6

307.2

kHz The receiver channel filter 6 dB

bandwidth is programmable from

9.6 kHz to 307.2 kHz. See

section 12.2 on page 30 for

details.

Noise figure, cascaded

433 and 868 MHz

NRZ coded data

Input IP3

433 MHz, 12.5 kHz channel spacing

868 MHz, 25 kHz channel spacing

-23

-18

-16

-18

-15

-13

dBm

Two tone test (+10 MHz and +20

MHz)

LNA2 maximum gain

LNA2 medium gain

LNA2 minimum gain

LNA2 maximum gain

LNA2 medium gain

LNA2 minimum gain

SWRS046B Page 8 of 91

CC1020

Parameter

Min Typ Max Unit Condition / Note

Co-channel rejection, FSK and OOK

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

-11

Wanted signal 3 dB above the

sensitivity level, FM jammer (1

kHz sine, ± 2.5 kHz deviation) at

operating frequency,

BER = 10-3

Adjacent channel rejection (ACR)

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

Wanted signal 3 dB above the

sensitivity level, FM jammer (1

kHz sine, ± 2.5 kHz deviation) at

adjacent channel. BER = 10-3

Image channel rejection

433/868 MHz

No I/Q gain and phase calibration

I/Q gain and phase calibrated

26/31

49/52

Wanted signal 3 dB above the

sensitivity level, CW jammer at

image frequency. BER = 10-3.

Image rejection after calibration

will depend on temperature and

supply voltage. Refer to section

12.6 on page 35.

Selectivity*

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

(*Close-in spurious response

rejection)

Wanted signal 3 dB above the

sensitivity level. CW jammer is

swept in 12.5 kHz/25 kHz steps

to within ± 1 MHz from wanted

channel. BER = 10-3. Adjacent

channel and image channel are

excluded.

Blocking / Desensitization*

433/868 MHz

± 1 MHz

± 2 MHz

± 5 MHz

± 10 MHz

(*Out-of-band spurious response

rejection)

50/57

64/71

75/78

Wanted signal 3 dB above the

sensitivity level, CW jammer at ±

1, 2, 5 and 10 MHz offset.

BER = 10-3. 12.5 kHz/25 kHz

channel spacing at 433/868 MHz.

Complying with EN 300 220,

class 2 receiver requirements.

Image frequency suppression,

433/868 MHz

No I/Q gain and phase calibration

I/Q gain and phase calibrated

36/41

59/62

Ratio between sensitivity for a

signal at the image frequency to

the sensitivity in the wanted

channel. Image frequency is RF-

2 IF. The signal source is a 2.4

kBaud, Manchester coded data,

±2.025 kHz frequency deviation,

signal level for BER = 10-3

Spurious reception

40 dB Ratio between sensitivity for an

unwanted frequency to the

sensitivity in the wanted channel.

The signal source is a 2.4 kBaud,

Manchester coded data, ±2.025

kHz frequency deviation, swept

over all frequencies 100 MHz - 2

GHz. Signal level for BER = 10-3

Intermodulation rejection (1)

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

Wanted signal 3 dB above the

sensitivity level, two CW jammers

at +2Ch and +4Ch where Ch is

channel spacing 12.5 kHz or 25

kHz. BER = 10-2

SWRS046B Page 9 of 91

CC1020

Parameter

Min Typ Max Unit Condition / Note

Intermodulation rejection (2)

12.5 kHz channel spacing, 433 MHz

25 kHz channel spacing, 868 MHz

Wanted signal 3 dB above the

sensitivity level, two CW jammers

at +10 MHz and +20 MHz offset.

BER = 10-2

LO leakage, 433/868 MHz <-80/-66 dBm

VCO leakage -64 dBm VCO frequency resides between

1608 - 1880 MHz

Spurious emission, radiated CW

9 kHz - 1 GHz

1 - 4 GHz

<-60

dBm

Complying with EN 300 220,

FCC CFR47 part 15 and ARIB

STD T-67.

Spurious emissions can be

measured as EIRP values

according to EN 300 220.

Input impedance

433 MHz

868 MHz

58 - j10

54 - j22

Ω

Receive mode. See section 14 on

page 46 for details.

Matched input impedance, S11

433 MHz

868 MHz

-14

-12

Using application circuit matching

network. See section 14 on page

46 for details.

Matched input impedance

433 MHz

868 MHz

39 - j14

32 - j10

Ω

Using application circuit matching

network. See section 14 on page

46 for details.

Bit synchronization offset 8000 ppm The maximum bit rate offset

tolerated by the bit

synchronization circuit for 6 dB

degradation (synchronous modes

only)

Data latency

NRZ mode

Manchester mode

Baud

Time from clocking the data on

the transmitter DIO pin until data

is available on receiver DIO pin

Table 4. RF receive parameters

SWRS046B Page 10 of 91

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