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ADF7021 데이터시트(PDF) 43 Page - Analog Devices

부품명 ADF7021
상세설명  High Performance Narrow-Band Transceiver IC
PDF  64 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

ADF7021 데이터시트(HTML) 43 Page - Analog Devices

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Data Sheet
ADF7021
Rev. B | Page 43 of 64
POWER-DOWN
CE LOW
WRITE TO REGISTER 5 (STARTS IF FILTER CALIBRATION)
WAIT 0.2ms (COARSE CAL) OR WAIT 5.2ms
(COARSE CALIBRATION + FINE CALIBRATION)
WRITE TO REGISTER 11 (SET UP SWD)
WRITE TO REGISTER 12 (ENABLE SWD)
WRITE TO REGISTER 6 (SETS UP IF FILTER CALIBRATION)
CE LOW
POWER-DOWN
Rx MODE
WRITE TO REGISTER 3 (TURNS ON Tx/Rx CLOCKS)
WRITE TO REGISTER 4 (TURNS ON DEMOD)
WRITE TO REGISTER 10 (TURNS ON AFC)
OPTIONAL.
WRITE TO REGISTER 0 (TURNS ON PLL)
WAIT 40µs (TYPICAL PLL SETTLING)
CE HIGH
WAIT 10µs (REGULATOR POWER-UP)
WRITE TO REGISTER 1 (TURNS ON VCO)
WAIT 0.7ms (TYPICAL VCO SETTLING)
CE HIGH
WAIT 10µs + 1ms
(REGULATOR POWER-UP + TYPICAL XTAL SETTLING)
XTAL
REFERENCE
TCXO
REFERENCE
OPTIONAL:
ONLY NECESSARY IF
AFC IS REQUIRED.
OPTIONAL:
ONLY NECESSARY IF
SWD IS REQUIRED.
OPTIONAL:
ONLY NECESSARY IF
IF FILTER FINE CAL IS REQUIRED.
Figure 55. Power-Up Sequence for Receive Mode



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