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SX1211
WIRELESS & SENSING
(1)
(2)
Guaranteed by design and characterization
Crystal Cload=10pF, C0=2.5pF, Rm=15 Ohms
2.4.2. Frequency Synthesis
Table 6: Frequency Synthesizer Specification
Symbol
FR
BR_F
BR_O
FDA
XTAL
FSTEP
TS_OSC
Description
Frequency ranges
Bit rate (FSK)
Bit rate (OOK)
Frequency deviation (FSK)
Crystal oscillator frequency
Frequency synthesizer
step
Oscillator wake-up time
Conditions
Programmable but requires
specific BOM
NRZ
NRZ
Variable, depending on the
frequency.
From Sleep mode (1)
Min
863
902
950
1.56
1.56
33
9
-
-
Typ
-
-
-
-
-
50
12.8
2
1.5
Max
870
928
960
200
32
200
15
-
5
Unit
MHz
MHz
MHz
Kb/s
Kb/s
kHz
MHz
kHz
ms
Frequency synthesizer
TS_FS
wake-up time at most
10 kHz away from the
From Stby mode
-
500
800
μs
target
200 kHz step
1 MHz step
-
-
180
200
-
-
μs
μs
TS_HOP
Frequency synthesizer hop
time at most 10 kHz away
from the target
5 MHz step
7 MHz step
12 MHz step
20 MHz step
27 MHz step
-
-
-
-
-
250
260
290
320
340
-
-
-
-
-
μs
μs
μs
μs
μs
(1)
Guaranteed by design and characterization
2.4.3. Transmitter
Table 7: Transmitter Specification
Symbol
RFOP
Description
RF output power,
programmable with 8 steps
of typ. 3dB
Conditions
Maximum power setting
Minimum power setting
Min
-
-
Typ
+12.5
-8.5
Max
-
-
Unit
dBm
dBm
Measured with a 600 kHz
PN
Phase noise
offset, at the transmitter
-
-112
-
dBc/Hz
output.
At any offset between
SPT
Transmitted spurious
200 kHz and 600 kHz,
unmodulated carrier, Fdev
-
-
-47
dBc
= 50 kHz.
TS_TR (1)
Transmitter wake-up time
From FS to Tx ready.
-
120
500
μs
Guaranteed by design and characterization
TS_TR2 (1) Transmitter wake-up time From Stby to Tx ready.
(1)
Rev 8 – February 2013
Page 9 of 92
-
600
900
μs
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