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TI-CC1101.pdf
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TI-CC1101.pdf
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CC1101
SWRS061I Page 1 of 98
Low-Power Sub-1 GHz RF Transceiver
Applications
Ultra low-power wireless applications
operating in the 315/433/868/915 MHz
ISM/SRD bands
Wireless alarm and security systems
Industrial monitoring and control
Wireless sensor networks
AMR – Automatic Meter Reading
Home and building automation
Wireless MBUS
Product Description
CC1101
is a low-cost sub-1 GHz transceiver
designed for very low-power wireless appli-
cations. The circuit is mainly intended for the
ISM (Industrial, Scientific and Medical) and
SRD (Short Range Device) frequency bands
at 315, 433, 868, and 915 MHz, but can easily
be programmed for operation at other
frequencies in the 300-348 MHz, 387-464 MHz
and 779-928 MHz bands.
The RF transceiver is integrated with a highly
configurable baseband modem. The modem
supports various modulation formats and has
a configurable data rate up to 600 kbps.
CC1101
provides extensive hardware support
for packet handling, data buffering, burst
transmissions, clear channel assessment, link
quality indication, and wake-on-radio.
The main operating parameters and the 64-
byte transmit/receive FIFOs of
CC1101
can be
controlled via an SPI interface. In a typical
system, the
CC1101
will be used together with a
microcontroller and a few additional passive
components.
The
CC1190
850-950 MHz range extender [21]
can be used with
CC1101
in long range
applications for improved sensitivity and higher
output power.
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CC1101
CC1101
SWRS061I Page 2 of 98
Key Features
RF Performance
High sensitivity
o -116 dBm at 0.6 kBaud, 433 MHz,
1% packet error rate
o -112 dBm at 1.2 kBaud, 868 MHz,
1% packet error rate
Low current consumption (14.7 mA in RX,
1.2 kBaud, 868 MHz)
Programmable output power up to +12
dBm for all supported frequencies
Excellent receiver selectivity and blocking
performance
Programmable data rate from 0.6 to 600
kbps
Frequency bands: 300-348 MHz, 387-464
MHz and 779-928 MHz
Analog Features
2-FSK, 4-FSK, GFSK, and MSK supported
as well as OOK and flexible ASK shaping
Suitable for frequency hopping systems
due to a fast settling frequency
synthesizer; 75 μs settling time
Automatic Frequency Compensation
(AFC) can be used to align the frequency
synthesizer to the received signal centre
frequency
Integrated analog temperature sensor
Digital Features
Flexible support for packet oriented
systems; On-chip support for sync word
detection, address check, flexible packet
length, and automatic CRC handling
Efficient SPI interface; All registers can be
programmed with one “burst” transfer
Digital RSSI output
Programmable channel filter bandwidth
Programmable Carrier Sense (CS)
indicator
Programmable Preamble Quality Indicator
(PQI) for improved protection against false
sync word detection in random noise
Support for automatic Clear Channel
Assessment (CCA) before transmitting (for
listen-before-talk systems)
Support for per-package Link Quality
Indication (LQI)
Optional automatic whitening and de-
whitening of data
Low-Power Features
200 nA sleep mode current consumption
Fast startup time; 240 μs from sleep to RX
or TX mode (measured on EM reference
design [1] and [2])
Wake-on-radio functionality for automatic
low-power RX polling
Separate 64-byte RX and TX data FIFOs
(enables burst mode data transmission)
General
Few external components; Completely on-
chip frequency synthesizer, no external
filters or RF switch needed
Green package: RoHS compliant and no
antimony or bromine
Small size (QLP 4x4 mm package, 20
pins)
Suited for systems targeting compliance
with EN 300 220 (Europe) and FCC CFR
Part 15 (US)
Suited for systems targeting compliance
with the Wireless MBUS standard
EN 13757-4:2005
Support for asynchronous and
synchronous serial receive/transmit mode
for backwards compatibility with existing
radio communication protocols
Improved Range using CC1190
The
CC1190
[21] is a range extender for
850-950 MHz and is an ideal fit for
CC1101
to enhance RF performance
High sensitivity
o -118 dBm at 1.2 kBaud, 868 MHz,
1% packet error rate
o -120 dBm at 1.2 kBaud, 915 MHz,
1% packet error rate
+20 dBm output power at 868 MHz
+27 dBm output power at 915 MHz
Refer to AN094 [22] and AN096 [23] for
more performance figures of the
CC1101
+
CC1190
combination
CC1101
SWRS061I Page 3 of 98
Reduced Battery Current using
TPS62730
The
TPS62730
[26] is a step down
converter with bypass mode for ultra low
power wireless applications.
In RX, the current drawn from a 3.6 V
battery is typically less than 11 mA when
TPS62730
output voltage is 2.1 V. When
connecting
CC1101
directly to a 3.6 V
battery the current drawn is typically 17
mA (see Figure 1)
In TX, at maximum output power (+12
dBm), the current drawn from a 3.6 V
battery is typically 22 mA when
TPS62730
output voltage is 2.1 V. When connecting
CC1101
directly to a 3.6 V battery the
current drawn is typically 34 mA (see
Figure 2).
When
CC1101
enters SLEEP mode, the
TPS62730
can be put in bypass mode for
very low power down current
The typical
TPS62730
current consumption
is 30 nA in bypass mode.
The
CC1101
is connected to the battery via
an integrated 2.1 Ω (typical) switch in
bypass mode
Figure 1: Typical RX Battery Current vs Battery Voltage
Figure 2: Typical TX Battery Current vs Battery Voltage at Maximum CC1101 Output Power (+12
dBm)
CC1101
SWRS061I Page 4 of 98
Abbreviations
Abbreviations used in this data sheet are described below.
2-FSK
Binary Frequency Shift Keying
MSB
Most Significant Bit
4-FSK
Quaternary Frequency Shift Keying
MSK
Minimum Shift Keying
ACP
Adjacent Channel Power
N/A
Not Applicable
ADC
Analog to Digital Converter
NRZ
Non Return to Zero (Coding)
AFC
Automatic Frequency Compensation
OOK
On-Off Keying
AGC
Automatic Gain Control
PA
Power Amplifier
AMR
Automatic Meter Reading
PCB
Printed Circuit Board
ASK
Amplitude Shift Keying
PD
Power Down
BER
Bit Error Rate
PER
Packet Error Rate
BT
Bandwidth-Time product
PLL
Phase Locked Loop
CCA
Clear Channel Assessment
POR
Power-On Reset
CFR
Code of Federal Regulations
PQI
Preamble Quality Indicator
CRC
Cyclic Redundancy Check
PQT
Preamble Quality Threshold
CS
Carrier Sense
PTAT
Proportional To Absolute Temperature
CW
Continuous Wave (Unmodulated Carrier)
QLP
Quad Leadless Package
DC
Direct Current
QPSK
Quadrature Phase Shift Keying
DVGA
Digital Variable Gain Amplifier
RC
Resistor-Capacitor
ESR
Equivalent Series Resistance
RF
Radio Frequency
FCC
Federal Communications Commission
RSSI
Received Signal Strength Indicator
FEC
Forward Error Correction
RX
Receive, Receive Mode
FIFO
First-In-First-Out
SAW
Surface Aqustic Wave
FHSS
Frequency Hopping Spread Spectrum
SMD
Surface Mount Device
FS
Frequency Synthesizer
SNR
Signal to Noise Ratio
GFSK
Gaussian shaped Frequency Shift Keying
SPI
Serial Peripheral Interface
IF
Intermediate Frequency
SRD
Short Range Devices
I/Q
In-Phase/Quadrature
TBD
To Be Defined
ISM
Industrial, Scientific, Medical
T/R
Transmit/Receive
LC
Inductor-Capacitor
TX
Transmit, Transmit Mode
LNA
Low Noise Amplifier
UHF
Ultra High frequency
LO
Local Oscillator
VCO
Voltage Controlled Oscillator
LSB
Least Significant Bit
WOR
Wake on Radio, Low power polling
LQI
Link Quality Indicator
XOSC
Crystal Oscillator
MCU
Microcontroller Unit
XTAL
Crystal
CC1101
SWRS061I Page 5 of 98
Table Of Contents
APPLICATIONS .................................................................................................................................................. 1
PRODUCT DESCRIPTION ................................................................................................................................ 1
KEY FEATURES ................................................................................................................................................. 2
RF PERFORMANCE .......................................................................................................................................... 2
ANALOG FEATURES ........................................................................................................................................ 2
DIGITAL FEATURES ......................................................................................................................................... 2
LOW-POWER FEATURES ................................................................................................................................ 2
GENERAL ............................................................................................................................................................ 2
IMPROVED RANGE USING CC1190 .............................................................................................................. 2
REDUCED BATTERY CURRENT USING TPS62730 .................................................................................... 3
ABBREVIATIONS ............................................................................................................................................... 4
TABLE OF CONTENTS ..................................................................................................................................... 5
1 ABSOLUTE MAXIMUM RATINGS ..................................................................................................... 8
2 OPERATING CONDITIONS ................................................................................................................. 8
3 GENERAL CHARACTERISTICS ......................................................................................................... 8
4 ELECTRICAL SPECIFICATIONS ....................................................................................................... 9
4.1 CURRENT CONSUMPTION ............................................................................................................................ 9
4.2 RF RECEIVE SECTION ................................................................................................................................ 12
4.3 RF TRANSMIT SECTION ............................................................................................................................. 16
4.4 CRYSTAL OSCILLATOR .............................................................................................................................. 18
4.5 LOW POWER RC OSCILLATOR ................................................................................................................... 18
4.6 FREQUENCY SYNTHESIZER CHARACTERISTICS .......................................................................................... 19
4.7 ANALOG TEMPERATURE SENSOR .............................................................................................................. 19
4.8 DC CHARACTERISTICS .............................................................................................................................. 20
4.9 POWER-ON RESET ..................................................................................................................................... 20
5 PIN CONFIGURATION ........................................................................................................................ 20
6 CIRCUIT DESCRIPTION .................................................................................................................... 22
7 APPLICATION CIRCUIT .................................................................................................................... 22
7.1 BIAS RESISTOR .......................................................................................................................................... 22
7.2 BALUN AND RF MATCHING ....................................................................................................................... 23
7.3 CRYSTAL ................................................................................................................................................... 23
7.4 REFERENCE SIGNAL .................................................................................................................................. 23
7.5 ADDITIONAL FILTERING ............................................................................................................................ 24
7.6 POWER SUPPLY DECOUPLING .................................................................................................................... 24
7.7 ANTENNA CONSIDERATIONS ..................................................................................................................... 24
7.8 PCB LAYOUT RECOMMENDATIONS ........................................................................................................... 26
8 CONFIGURATION OVERVIEW ........................................................................................................ 27
9 CONFIGURATION SOFTWARE ........................................................................................................ 29
10 4-WIRE SERIAL CONFIGURATION AND DATA INTERFACE .................................................. 29
10.1 CHIP STATUS BYTE ................................................................................................................................... 31
10.2 REGISTER ACCESS ..................................................................................................................................... 31
10.3 SPI READ .................................................................................................................................................. 32
10.4 COMMAND STROBES ................................................................................................................................. 32
10.5 FIFO ACCESS ............................................................................................................................................ 32
10.6 PATABLE ACCESS ................................................................................................................................... 33
11 MICROCONTROLLER INTERFACE AND PIN CONFIGURATION .......................................... 34
11.1 CONFIGURATION INTERFACE ..................................................................................................................... 34
11.2 GENERAL CONTROL AND STATUS PINS ..................................................................................................... 34
11.3 OPTIONAL RADIO CONTROL FEATURE ...................................................................................................... 34
12 DATA RATE PROGRAMMING .......................................................................................................... 35
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