Datasheet

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SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
Note For Maximum Bit Rate the maximum modulation index is 0.5.
2.5.3. FSK/OOK Mode Receiver
All receiver tests are performed with RxBw = 10 kHz (Single Side Bandwidth) as programmed in RegRxBw, receiving a
PN15 sequence. Sensitivities are reported for a 0.1% BER (with Bit Synchronizer enabled), unless otherwise specified.
Blocking tests are performed with an unmodulated interferer. The wanted signal power for the Blocking Immunity, ACR,
IIP2, IIP3 and AMR tests is set 3 dB above the receiver sensitivity level.
Table 8 Receiver Specification
BRF Bit rate, FSK Programmable values (1) 1.2 - 300 kbps
BRO Bit rate, OOK Programmable 1.2 - 32.768 kbps
BRA Bit Rate Accuracy ABS(wanted BR - available BR) - - 250 ppm
FDA Frequency deviation, FSK (1) Programmable
FDA + BRF/2 =< 250 kHz
0.6 - 200 kHz
Symbol Description Conditions Min Typ Max Unit
RFS_F
Direct tie of RFI and RFO pins,
shared Rx, Tx paths FSK sensitiv-
ity, highest LNA gain.
FDA = 5 kHz, BR = 1.2 kbps
FDA = 5 kHz, BR = 4.8 kbps
FDA = 40 kHz, BR = 38.4 kbps*
FDA = 20 kHz, BR = 38.4 kbps**
FDA = 62.5 kHz, BR = 250 kbps***
-
-
-
-
-
-119
-115
-105
-106
-92
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
Split RF paths, LnaBoost is turned
on, the RF switch insertion loss is
not accounted for.
FDA = 5 kHz, BR = 1.2 kbps
FDA = 5 kHz, BR = 4.8 kbps
FDA = 40 kHz, BR = 38.4 kbps*
FDA = 20 kHz, BR = 38.4 kbps**
FDA = 62.5 kHz, BR = 250 kbps***
-
-
-
-
-
-123
-119
-110
-110
-97
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
RFS_O
OOK sensitivity, highest LNA gain
shared Rx, Tx paths
BR = 4.8 kbps
BR = 32 kbps
-
-
-117
-108
-
-
dBm
dBm
CCR Co-Channel Rejection - -9 - dB
ACR Adjacent Channel Rejection
FDA = 2 kHz, BR = 1.2 kbps,
RxBw = 5.2 kHz
Offset = +/- 25 kHz
- 54 - dB
FDA = 5 kHz, BR=4.8kbps
Offset = +/- 25 kHz
Offset = +/- 50 kHz
-
-
50
50
-
-
dB
dB
BI Blocking Immunity
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
-
-
-
73
78
87
-
-
-
dB
dB
dB
AMR
AM Rejection, AM modulated
interferer with 100% modulation
depth, fm = 1 kHz, square
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
-
-
-
73
78
87
-
-
-
dB
dB
dB