Datasheet

www.semtech.comPage 17
SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
* RxBw = 83 kHz (Single Side Bandwidth)
** RxBw = 50 kHz (Single Side Bandwidth)
*** RxBw = 250 kHz (Single Side Bandwidth)
2.5.4. FSK/OOK Mode Transmitter
Table 9 Transmitter Specification
IIP2
2nd Order input intercept point
unwanted tones are 20 MHz
above the LO
Highest LNA gain - +57 - dBm
IIP3
3rd Order input intercept point
unwanted tones are 1 MHz and
1.995 MHz above the LO
Highest LNA gain G1
LNA gain G2, 4dB sensitivity
reduction.
-
-
-12.5
-8.5
-
-
dBm
dBm
BW_SSB Single Side channel filter BW Programmable 2.7 - 250 kHz
IMR Image Rejection
Wanted signal power sensitivity +3 dB
BER = 0.1%
- 48 - dB
IMA Image Attenuation - 57 - dB
DR_RSSI RSSI Dynamic Range
AGC enabled Min
Max
-
-
-127
0
-
-
dBm
dBm
Symbol Description Conditions Min Typ Max Unit
RF_OP
RF output power in 50 ohms
on RFO pin (High efficiency PA).
Programmable with steps
Max
Min
+11
-
+14
-1
-
-
dBm
dBm
ΔRF_
OP_V
RF output power stability on RFO
pin versus voltage supply
VDD = 2.5 V to 3.3 V
VDD = 1.8 V to 3.7 V
-
-
3
8
-
-
dB
dB
RF_OPH
RF output power in 50 ohms, on
PA_BOOST pin (Regulated PA)
Programmable with 1dB steps Max
Min
-
-
+17
+2
-
-
dBm
dBm
RF_OPH_
MAX
Max RF output power, on
PA_BOOST pin
High power mode - +20 - dBm
ΔRF_
OPH_V
RF output power stability on PA_-
BOOST pin versus voltage supply.
VDD = 2.4 V to 3.7 V - +/-1 - dB
ΔRF_T
RF output power stability versus
temperature on both RF pins.
From T = -40 °C to +85 °C - +/-1 - dB
PHN Transmitter Phase Noise
Low Consumption PLL, 915 MHz
50 kHz offset
400 kHz offset
1 MHz offset
-
-
-
-102
-114
-120
-
-
-
dBc/
Hz
Low Phase Noise PLL, 915 MHz
50 kHz offset
400 kHz offset
1 MHz offset
-
-
-
-106
-117
-122
-
-
-
dBc/
Hz