www.semtech.comPage 16
SX1276/77/78
WIRELESS & SENSING DATASHEET
Rev. 1 - September 2013
©2013 Semtech Corporation
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 5 FSK/OOK Receiver Specification
Symbol Description Conditions Min Typ Max Unit
RFS_F_LF
Direct tie of RFI and RFO pins,
shared Rx, Tx paths FSK sensitiv-
ity, highest LNA gain.
Bands 2&3
FDA = 5 kHz, BR = 1.2 kb/s
FDA = 5 kHz, BR = 4.8 kb/s
FDA = 40 kHz, BR = 38.4 kb/s*
FDA = 20 kHz, BR = 38.4 kb/s**
FDA = 62.5 kHz, BR = 250 kb/s***
-
-
-
-
-
-121
-117
-107
-108
-95
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
Split RF paths, the RF switch
insertion loss is not accounted for.
Bands 2&3
FDA = 5 kHz, BR = 1.2 kb/s
FDA = 5 kHz, BR = 4.8 kb/s
FDA = 40 kHz, BR = 38.4 kb/s*
FDA = 20 kHz, BR = 38.4 kb/s**
FDA = 62.5 kHz, BR = 250 kb/s***
-
-
-
-
-
-123
-119
-109
-110
-97
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
RFS_F_HF
Direct tie of RFI and RFO pins,
shared Rx, Tx paths FSK sensitiv-
ity, highest LNA gain.
Band 1
FDA = 5 kHz, BR = 1.2 kb/s
FDA = 5 kHz, BR = 4.8 kb/s
FDA = 40 kHz, BR = 38.4 kb/s*
FDA = 20 kHz, BR = 38.4 kb/s**
FDA = 62.5 kHz, BR = 250 kb/s***
-
-
-
-
-
-119
-115
-105
-105
-92
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
Split RF paths, LnaBoost is turned
on, the RF switch insertion loss is
not accounted for.
Band 1
FDA = 5 kHz, BR = 1.2 kb/s
FDA = 5 kHz, BR = 4.8 kb/s
FDA = 40 kHz, BR = 38.4 kb/s*
FDA = 20 kHz, BR = 38.4 kb/s**
FDA = 62.5 kHz, BR = 250 kb/s***
-
-
-
-
-
-123
-119
-109
-109
-96
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
RFS_O
OOK sensitivity, highest LNA gain
shared Rx, Tx paths
BR = 4.8 kb/s
BR = 32 kb/s
-
-
-117
-108
-
-
dBm
dBm
CCR Co-Channel Rejection, FSK - -9 - dB
ACR Adjacent Channel Rejection
FDA = 5 kHz, BR=4.8kb/s
Offset = +/- 25 kHz or +/- 50kHz
Band 3
Band 2
Band 1
-
-
-
60
56
50
-
-
-
dB
dB
dB
BI_HF Blocking Immunity, Band 1
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
-
-
-
71
76
84
-
-
-
dB
dB
dB
BI_LF Blocking Immunity, Bands 2&3
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
-
-
-
71
72
78
-
-
-
dB
dB
dB