SX1211 Просмотр технического описания (PDF) - Semtech Corporation

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Компоненты Описание

производитель

SX1211

Ultra-Low Power Integrated UHF Transceiver

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

SX1211

DATA

VR_PA

[V]

95 %

tVR_PA

95 %

tVR_PA

PA Output

power

60 dB

60 dB

tPA_OUT

tPA_OUT

Figure 10: PA Control

3.3.7.2. Optimum Load Impedance

As the PA and the LNA front-ends in the SX1211 share the same Input/Output pin, they are internally matched to

approximately 50 Ω.

Pmax-1dB circle

Max Power

Zopt = 30+j25 Ω

Figure 11: Optimal Load Impedance Chart

Please refer to the reference design section for an optimized PA load setting.

Rev 7 – Sept 2nd, 2008

Page 21 of 92

www.semtech.com

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