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RF63 Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers

Part # RF63
Description  Ultra-Low Power Integrated UHF Transceiver
PDF  91 Pages
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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RF63 Datasheet(HTML) 22 Page - List of Unclassifed Manufacturers

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ADVANCED COMMUNICATIONS & SENSING
Page 22 of 91
RF63
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com
Reg_PA
Rx_on
PA
LNA
3.3.7.3. Suggested PA Biasing and Matching
The recommended PA bias and matching circuit is illustrated below:
VR_PA
47nF
100nH
PA
RFIO
SAW
DC block
Antenna
port
Low-pass and DC block
Figure 12: Recommended PA Biasing and Output Matching
Please refer to section 7.5.3 of this document for the optimized matching arrangement for each frequency band.
3.3.8. Common Input and Output Front-End
The receiver and the transmitter share the same RFIO pin (pin 32). Figure 13 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.
VR_PA
To
Antenna
RFIO
Figure 13: Front-end Description



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