SX1232
WIRELESS & SENSING
DATASHEET
BRF
BRO
BRA
FDA
Bit rate, FSK
Programmable values (1)
Programmable
1.2
1.2
-
-
-
-
-
300
32.768
250
kbps
kbps
ppm
kHz
Bit rate, OOK
Bit Rate Accuracy
Frequency deviation, FSK (1)
ABS(wanted BR - available BR)
Programmable
0.6
200
FDA + BRF/2 =< 250 kHz
Note For Maximum Bit rate the maximum modulation index is 1.
2.4.3. 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 6 Receiver Specification
Symbol
Description
Conditions
Min
Typ
Max
Unit
RFS_F
Direct tie of RFI and RFO pins, as
shown in Figure 39.
FSK sensitivity, highest LNA gain.
-
-
-
-
-
-119
-115
-105
-106
-92
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
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***
Split RF paths, as shown in
Figure 40, LnaBoost is turned
on, the RF switch insertion loss is
not accounted for.
-
-
-
-
-
-123
-119
-110
-110
-97
-
-
-
-
-
dBm
dBm
dBm
dBm
dBm
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***
RFS_O
OOK sensitivity, highest LNA gain
Conditions of Figure 39
-
-
-117
-108
-
-
dBm
dBm
BR = 4.8 kb/s
BR = 32 kb/s
CCR
ACR
Co-Channel Rejection
-
-8
-
dB
Adjacent Channel Rejection
FDA = 2 kHz, BR = 1.2kb/s,
RxBw = 5.2kHz
-
54
-
dB
Offset = +/- 25 kHz
FDA = 5 kHz, BR=4.8kb/s
Offset = +/- 25 kHz
-
-
50
50
-
-
dB
dB
Offset = +/- 50 kHz
BI
Blocking Immunity
-
-
-
73
78
87
-
-
-
dB
dB
dB
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
AMR
AM Rejection, AM modulated
interferer with 100% modulation
depth, fm = 1 kHz, square
-
-
-
73
78
87
-
-
-
dB
dB
dB
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 10 MHz
Rev 3 - August 2012
Page 14
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