SX1211I084TRT(2007) Просмотр технического описания (PDF) - Semtech Corporation

Номер в каталоге

Компоненты Описание

производитель

SX1211I084TRT
(Rev.:2007)

Lowest Power Integrated UHF Transceiver Short Range Devices

Semtech Corporation 

ADVANCED COMMUNICATIONS & SENSING

3.3.7. Transmitter Spectral Purity

SX1211

Figure 12: 869 MHz Spectral Purity DC-1GHz

Figure 13: 869 MHz Spectral Purity 1-6GHz

3.3.8. Common Input and Output Front-End

The receiver and the transmitter share the same RFIO pin (pin 31). Figure 14 below shows the configuration of the

common RF front-end.

In transmit mode, the PA and the PA regulator are active, with the voltage on the VR_PA pin equal to the nominal

voltage of the regulator (1.8 V). The external inductance is used to bias the PA.

In receive mode, both PA and PA regulator are off and VR_PA is tied to ground. The external inductance LT1 is

then used to bias the LNA.

V3.0 – august 15th, 2007

Page 22 of 73

www.semtech.com

Share Link: