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AFE031AIRGZRG4 데이터시트(PDF) 32 Page - Texas Instruments

부품명 AFE031AIRGZRG4
상세설명  AFE031 Powerline Communications Analog Front-End
PDF  59 Pages
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
Logo TI2 - Texas Instruments

AFE031AIRGZRG4 데이터시트(HTML) 32 Page - Texas Instruments

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AVDD
2
External 1-nF
noise reduction capacitor
AVDD
R
R
AGND
Inside the AFE031
4 kW
bias
Internal
REF2
Copyright © 2017, Texas Instruments Incorporated
External 1- F
noise reduction capacitor
m
PA_V
S
R
R
PA_GND
Inside the AFE031
4 kW
PA_V
2
S bias
Internal
REF1
Copyright © 2017, Texas Instruments Incorporated
32
AFE031
SBOS531E – AUGUST 2010 – REVISED JUNE 2019
www.ti.com
Product Folder Links: AFE031
Submit Documentation Feedback
Copyright © 2010–2019, Texas Instruments Incorporated
9.2.5 REF1 and REF2 Blocks
The REF1 and REF2 blocks create midscale power-supply biasing points used internally to the AFE031. Each
reference divides its respective power-supply voltage in half with a precision resistive voltage divider. REF1
provides a PA_VS/2 voltage used for the PA, while REF2 provides an AVDD/2 voltage used for the Tx PGA, Tx
Filter, Rx PGA1, Rx Filter, and Rx PGA2. Each REF block has its output brought out to an external pin that can
be used for filtering and noise reduction. Figure 35 and Figure 36 show the proper connections of the external
noise-reducing capacitors. These capacitors are optional, but are recommended for best performance.
Figure 35. REF1 Functional Diagram
Figure 36. REF2 Functional Diagram



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