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ADMV1455BBCZ-R7 데이터시트(PDF) 68 Page - Analog Devices

부품명 ADMV1455BBCZ-R7
상세설명  17.7GHz to 55GHz, Wideband, Microwave Downconverter
PDF  141 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

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Data Sheet
ADMV1455
THEORY OF OPERATION
analog.com
Rev. 0 | 68 of 141
Initialization SPI Instructions
Starting at tINITIALIZE (see Figure 167), configure the chip by using
the SPI instructions for its intended operation. Give all the neces-
sary SPI instructions to configure the chip, looping from tINITIALIZE
to the ready time, tREADY for each instruction. Keep the CEN
input low during the initialization SPI instructions, and complete the
initialization at tREADY.
Chip Enable and Operation
After all the initialization SPI instructions have been completed, wait
a minimum of t16 to ensure that the digital logic has processed the
instructions prior to setting the CEN input high at tOPERATIONAL to
enable chip operation. At tOPERATIONAL, the RF portions of the chip
are enabled. See Figure 168 for more information.
During chip operation, any necessary SPI instructions can be giv-
en, along with the LOAD input toggles, and any changes to the
ADD_Fx and ADD_Gx inputs. Continue operating, looping from
tOPERATIONAL to tCONTINUE until it is desired to either disable the chip,
reset the chip, or power down the chip.
Figure 168. Operational Timing Diagram



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