SX1231
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
IMR_OOK
TS_RE
Image rejection in OOK mode
Wanted signal level = -106 dBm
27
30
-
dB
Receiver wake-up time, from PLL
locked state to RxReady
-
-
1.7
96
-
-
ms
us
RxBw = 10 kHz, BR = 4.8 kb/s
RxBw = 200 kHz, BR = 100 kb/s
TS_RE_AGC Receiver wake-up time, from PLL
locked state, AGC enabled
-
3.0
163
ms
us
RxBw= 10 kHz, BR = 4.8 kb/s
RxBw = 200 kHz, BR = 100 kb/s
TS_RE_AGC Receiver wake-up time, from PLL
4.8
265
ms
us
RxBw= 10 kHz, BR = 4.8 kb/s
RxBw = 200 kHz, BR = 100 kb/s
&AFC
lock state, AGC and AFC enabled
TS_FEI
TS_AFC
TS_RSSI
DR_RSSI
FEI sampling time
Receiver is ready
Receiver is ready
Receiver is ready
AGC enabled
-
-
-
4.T
-
-
-
-
-
-
bit
bit
bit
AFC Response Time
4.T
2.T
RSSI Response Time
RSSI Dynamic Range
Min
Max
-
-
-115
0
-
-
dBm
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 output power in 50 ohms
On RFIO pin
Programmable with 1dB steps Max
Min
-
-
+13
-18
-
-
dBm
dBm
RF_OPH
Max RF output power, on
PA_BOOST pin
With external match to 50 ohms
-
+17
-
dBm
RF output power stability
Transmitter Phase Noise
From VDD=1.8V to 3.6V
-
+/-0.3
-
dB
ΔRF_OP
PHN
50 kHz Offset from carrier
868 / 915 MHz bands
434 / 315 MHz bands
-
-
-95
-99
-
-
dBc/
Hz
ACP
Transmitter adjacent channel
power (measured at 25 kHz off-
set)
BT=0.5 . Measurement conditions as
defined by EN 300 220-1 V2.1.1
-
-
-37
dBm
TS_TR
Transmitter wake up time, to the
first rising edge of DCLK
Frequency Synthesizer enabled,
PaRamp = 8us, BR = 4.8 kb/s.
-
120
-
us
Rev 2 - Nov 2009
Page 14
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
