sx1231h Semtech Corporation, sx1231h Datasheet - Page 13

• Manufacturer Part Number: sx1231h
• Description: Low Power Integrated Uhf Transceiver With On-chip +20dbm Pa
• Manufacturer: Semtech Corporation

2.4.3. Receiver
All receiver tests are performed with RxBw = 10 kHz (Single Side Bandwidth) as programmed in RegRxBw, receiving a
PN15 sequence with a BER of 0.1% (Bit Synchronizer is enabled), unless otherwise specified. The LNA impedance is set
to 200 Ohms, by setting bit LnaZin in RegLna to 1. 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 nominal sensitivity
level.
Table 6
Rev 1 - Oct 2011
ADVANCED COMMUNICATIONS & SENSING
FSTEP
FRC
BRF
BRO
FDA
Symbol
RFS_F
RFS_O
CCR
ACR
BI
AMR
IIP2
Receiver Specification
Frequency synthesizer step
RC Oscillator frequency
Bit rate, FSK
Bit rate, OOK
Frequency deviation, FSK
Description
FSK sensitivity, highest LNA gain
OOK sensitivity, highest LNA gain
Co-Channel Rejection
Adjacent Channel Rejection
Blocking Immunity
Blocking Immunity
Wanted signal at sensitivity
+16dB
AM Rejection , AM modulated
interferer with 100% modulation
depth, fm = 1 kHz, square
2nd order Input Intercept Point
Unwanted tones are 20 MHz
above the LO
After calibration
FSTEP = FXOSC/2
Programmable
Programmable
Programmable
FDA + BRF/2 =< 500 kHz
Conditions
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 = 5 kHz, BR = 1.2 kb/s *
BR = 4.8 kb/s
Page 13
19
Offset = +/- 10 MHz
Offset = +/- 10 MHz
Offset = +/- 10 MHz
Offset = +/- 25 kHz
Offset = +/- 50 kHz
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Offset = +/- 1 MHz
Offset = +/- 2 MHz
Highest LNA gain
Lowest LNA gain
1.2
1.2
0.6
-
-
Min
-13
37
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
61.0
62.5
-
-
-
-105
-120
-118
-114
-112
Typ
+75
+35
-10
42
42
66
71
79
62
65
73
66
71
79
SX1231H
32.768
DATASHEET
300
300
www.semtech.com
Max
-109
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Hz
kHz
kbps
kbps
kHz
dBm
dBm
dBm
dBm
dBm
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
Unit