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SX1231
WIRELESS & SENSING PRODUCTS
DATASHEET
IMR_OOK
TS_RE
TS_RE_AGC
Image rejection in OOK mode
Receiver wake-up time, from PLL
locked state to RxReady
Receiver wake-up time, from PLL
Wanted signal level = -106 dBm
RxBw = 10 kHz, BR = 4.8 kb/s
RxBw = 200 kHz, BR = 100 kb/s
RxBw = 10 kHz, BR = 4.8 kb/s
27
-
-
-
30
1.7
96
3.0
-
-
-
dB
ms
us
ms
locked state, AGC enabled
RxBw = 200 kHz, BR = 100 kb/s
163
us
TS_RE_AGC
&AFC
Receiver wake-up time, from PLL
lock state, AGC and AFC enabled
RxBw = 10 kHz, BR = 4.8 kb/s
RxBw = 200 kHz, BR = 100 kb/s
4.8
265
ms
us
TS_FEI
TS_AFC
TS_RSSI
FEI sampling time
AFC Response Time
RSSI Response Time
Receiver is ready
Receiver is ready
Receiver is ready
-
-
-
4.T bit
4.T bit
2.T bit
-
-
-
-
-
-
DR_RSSI
RSSI Dynamic Range
AGC enabled
Min
-
-115
-
dBm
Max
-
0
-
dBm
*
Set SensitivityBoost in RegTestLna to 0x2D to reduce the noise floor in the receiver
2.4.4. Transmitter
Table 7
Transmitter Specification
Symbol
Description
Conditions
Min
Typ
Max
Unit
RF_OP
RF_OPH
RF output power in 50 ohms
On RFIO pin
Max RF output power, on PA_-
Programmable with 1dB steps
With external match to 50 ohms
Max
Min
-
-
-
+13
-18
+17
-
-
-
dBm
dBm
dBm
BOOST pin
Δ RF_OP
RF output power stability
From VDD=1.8V to 3.6V
-
+/-0.3
-
dB
PHN
Transmitter Phase Noise
50 kHz Offset from carrier
868 / 915 MHz bands
434 / 315 MHz bands
-
-
-95
-99
-
-
dBc/
Hz
ACP
Transmitter adjacent channel
BT=0.5 . Measurement conditions as
-
-
-37
dBm
power (measured at 25 kHz off-
set)
defined by EN 300 220-1 V2.1.1
TS_TR
Transmitter wake up time, to the
Frequency Synthesizer enabled, PaR-
-
120
-
us
first rising edge of DCLK
amp = 10 us, BR = 4.8 kb/s.
Rev. 7 - June 2013
Page 16
www.semtech.com
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