SM1211E915 Semtech, SM1211E915 Datasheet - Page 21
SM1211E915
Manufacturer Part Number
SM1211E915
Description
Dev Kit Accessory
Manufacturer
Semtech
Specifications of SM1211E915
Modulation Type
FSK, OOK
Data Rate Max
200Kbps
Frequency Range
902MHz To 928MHz
Supply Voltage Range
2.1V To 3.6V
Module Interface
SPI
Supply Current
25mA
Accessory Type
RF Module
Sensitivity
-105dBm
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Package Type
TQFN EP
Operating Supply Voltage (min)
2.1V
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Sensitivity (dbm)
-105dBm
Rohs Compliant
NA
Lead Free Status / RoHS Status
na
Lead Free Status / RoHS Status
na
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As the PA and the LNA front-ends in the SX1211 share the same Input/Output pin, they are internally matched to
approximately 50 .
Please refer to the reference design section for an optimized PA load setting.
Rev 7 – Sept 2
ADVANCED COMMUNICATIONS & SENSING
nd
, 2008
3.3.7.2. Optimum Load Impedance
VR_PA
PA Output
power
DATA
[V]
Figure 11: Optimal Load Impedance Chart
60 dB
95 %
Figure 10: PA Control
t
t
VR_PA
PA_OUT
Page 21 of 92
t
t
VR_PA
PA_OUT
60 dB
95 %
Pmax-1dB circle
Pmax-1dB circle
Pmax-1dB circle
Pmax-1dB circle
Max Power
Max Power
Max Power
Max Power
Zopt = 30+j25
Zopt = 30+j25
Zopt = 30+j25
Zopt = 30+j25
www.semtech.com
SX1211
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