SX1211 Ultra-low Power Multi-Channel UHF-band Transceiver

Product Brief
SEMTECH
WIRELESS
&
SENSING
PRODUCTS
SX1211
Ultra-low Power Multi-Channel UHF-band Transceiver
WORLD’S LOWEST RECEIVE CURRENT TRANSCEIVER (<3mA)
Applications:
3x lower RX current than competitive devices
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Key Features:
• 3 mA current consumption in receive mode
• Rx sensitivity -107 dBm @ 25 kbit/s (FSK),
-110 dBm @ 2 kbit/s (OOK)
• Programmable RF output power: up to
+12.5 dBm in 8 steps
• FSK and OOK modulation
• Data rates programmable from 1.56 to
200 kbit/s (FSK)
• 64-byte FIFO for transmit/receive data buffering
and transfer via SPI bus
• RSSI (Received Signal Strength Indicator) range
from noise floor to 0 dBm
• Packet Handling, CRC generation and
Data Whitening
• Incoming sync word recognition
• Built-in bit-synchronizer for incoming data
and clock synchronization and recovery
• 868, 915 and 960 MHz frequency bands
• 5 x 5 mm TQFN32 RoHS-compliant
• Low external component count
• FCC DTS compliant (US ISM-band operation
without frequency-hopping)
• Satisfies ETSI EN 300-220-1 and FCC part 15.247
& 15.249 regulations
Security and Alarm Systems
Wireless Sensor Networks
Sub-Metering
Personal Area Network
Sports & Health Equipment
Home and Building Automation
KONNEX™ Systems
• Industrial Monitoring and Control
Block Diagram:
Transmission
I
RF
RFIO
2nd Stage
Mixers
PA
Q
I
LO1 Tx
Q
RSSI
I
1st Stage
Mixers
2nd Stage
Mixers Q
IF Gain
Phase-shift to frequency shift
conversion (FSK Mode)
(DDS, DACs,
Interpolation
Filters)
LO2 Tx
Reception
LNA
Modulation
1st Stage
Mixers
LO1 Rx
Filtering/
Amplification
OOK Demod
Digital
Demodulator
FSK Demod
SPI
Control
CLKOUT
DATA
LO2 Rx
Sync word
Frequency
Synthesis
PLL
(Comparator, VCO,
Filter, Dividers)
XTAL
LO1 Tx
LO1 Rx
LO2 Tx
LO2 Rx
PLL_LOCK
FIFO
Post Demod
Loop Filter
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Product Brief
SX1211
Ultra-low Power Multi-Channel UHF-band Transceiver
Characteristics
Parameter
Min
Typ
Max
Unit
Condition
Operating Conditions
Operating temperature range
-40
85
°C
Operating supply voltage
2.1
3.6
V
Current Consumption
Current consumption Rx
Current consumption Tx
3
mA
16.0
mA
+1 dBm
25.0
mA
+10 dBm
0.2
2
µA
863
870
MHz
902
928
MHz
950
960
MHz
1.56
200
kbit/s
FSK
1.56
32
kbit/s
OOK
Current consumption, sleep mode
RF Characteristics
Frequency range
Data rate (programmable)
-8.5
Tx output power (programmable)
Rx sensitivity
12.5
dBm
-107
dBm
-110
dBm
OOK Modulation: 2 kb/s NRZ, Carrier Frequency=869 MHz
Temp=25oC,
Conditions:
VDD=3.3V, crystal frequency=12.8 MHz, carrier frequency= 915 MHz, modulation FSK,
data rate=25 kb/s, ∆f=50 kHz, BW(SSB)=100 kHz, BER=0.1%, unless otherwise specified.
STARTUP TIME CHART
TYPICAL APPLICATION CIRCUIT
SPI Bus
To Host MCU
Icc
RX(ON) - Actual use
of Receiver
3.0mA
RX setting time
SX1211
PLL startup
SMA
SAW Filter
Z - Match
1.3mA
XTO startup
80μA
10μA
Average 10μA
Achievable
1.5ms
0.8ms
500μs
Duty Cycle: 2 seconds
Time
VCO Tank
Loop Filter
Visit our website to locate the most current product specifications, datasheets and contact information for your local Semtech Field Applications Engineer.
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WW
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W .. S
SE
EM
M TT E
EC
CH
H .. C
CO
OM
M
SX1211-PB-0408
Crystal