SX1239IMLTRT Semtech, SX1239IMLTRT Datasheet - Page 58
SX1239IMLTRT
Manufacturer Part Number
SX1239IMLTRT
Description
IC, RF RECEIVER, 1.02GHz, QFN-24
Manufacturer
Semtech
Datasheet
1.SX1239IMLTRT.pdf
(73 pages)
Specifications of SX1239IMLTRT
Applications
Wireless Sensor Networks, Automated Meter Reading, Home And Building Automation
Receiving Current
16mA
Data Rate
300Kbps
Modulation Type
FSK, OOK
Sensitivity Dbm
-120dBm
Rohs Compliant
Yes
Rf Ic Case Style
QFN
No. Of Pins
24
Sensitivity (dbm)
-120dBm
Supply Voltage Range
1.8V To 3.6V
Operating Temperature Range
-40°C To +85°C
Lead Free Status / Rohs Status
Supplier Unconfirmed
6.3. Receiver Registers
Table 21 Receiver Registers
Rev 3 - Jan 2011
ADVANCED COMMUNICATIONS & SENSING
Name
(Address)
Reserved14
(0x14)
Reserved15
(0x15)
Reserved16
(0x16)
Reserved17
(0x17)
RegLna
(0x18)
RegRxBw
(0x19)
RegAfcBw
(0x1A)
Bits Variable Name
7-0
7-0
7-0
7-0
5-3
2-0
7-5
4-3
2-0
7-5
4-3
2-0
7
6
-
-
-
-
LnaZin
-
LnaCurrentGain
LnaGainSelect
DccFreq
RxBwMant
RxBwExp
DccFreqAfc
RxBwMantAfc
RxBwExpAfc
Mode
rw
rw
rw
rw
rw
rw
rw
rw
r
r
r
r
r
r
Page 58
Default
Value
0xB0
0x7B
0x9B
0x40
011 *
001
000
010
101
100
10
01
1
0
*
*
*
*
Description
unused
unused
unused
unused
LNA’s input impedance
0
1
unused
Current LNA gain, set either manually, or by the AGC
LNA gain setting:
000
001
010
011
100
101
110
111
Cut-off frequency of the DC offset canceller (DCC):
~4% of the RxBw by default
Channel filter bandwidth control:
00
01
Channel filter bandwidth control:
FSK Mode:
OOK Mode:
See Table 10 for tabulated values
DccFreq parameter used during the AFC
RxBwMant parameter used during the AFC
RxBwExp parameter used during the AFC
50 ohms
200 ohms
RxBwMant = 16
RxBwMant = 20
reserved
G3 = highest gain – 12 dB
G6 = highest gain – 48 dB
gain set by the internal AGC loop
G1 = highest gain
G2 = highest gain – 6 dB
G4 = highest gain – 24 dB
G5 = highest gain – 36 dB
RxBw
RxBw
fc
=
=
----------------------------------------------------------------- -
RxBwMant 2
----------------------------------------------------------------- -
RxBwMant 2
=
----------------------------------------- -
2 π 2
×
4 RxBw
×
DccFreq
FXOSC
FXOSC
10
11
×
×
RxBwExp
RxBwExp
+
reserved
RxBwMant = 24
2
DATASHEET
www.semtech.com
SX1239
+
+
2
3