SX1211I084TRT Semtech, SX1211I084TRT Datasheet - Page 21

• Manufacturer Part Number: SX1211I084TRT
• Description: IC SNGL-CHIP TXRX 32-TQFN
• Manufacturer: Semtech

Specifications of SX1211I084TRT

• Frequency: 860 ~ 960MHz
• Data Rate - Maximum: 200kbps
• Modulation Or Protocol: FSK, OOK
• Applications: AMR, ISM, Security and Access
• Power - Output: 12.5dBm
• Sensitivity: -113dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 3mA
• Current - Transmitting: 25mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFN
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Modulation Type: FSK/OOK
• Package Type: TQFN EP
• Operating Supply Voltage (min): 2.1V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: SX1211I084TRT

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
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SX1211