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AD9670EBZ bảng dữ liệu(PDF) 36 Page - Analog Devices

tên linh kiện AD9670EBZ
Giải thích chi tiết về linh kiện  Octal Ultrasound Analog Front End
PDF  48 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
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AD9670EBZ bảng dữ liệu(HTML) 36 Page - Analog Devices

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Data Sheet
AD9674
Rev. A | Page 35 of 47
DIGITAL BLOCK POWER SAVING SCHEME
To reduce power consumption in the digital block after the ADC,
the RF decimator and filter start in an idle state after running
the chip (Register 0x008, Bits[2:0] = 000). The digital block only
switches to a running state when the negative edge of the TX_TRIG
signal pulse is detected, or with a software TX_TRIG signal write
(Register 0x10C, Bit 5 = 1).
To put the digital block back into the idle state (while the rest of
the chip is still running) and save power, raise the TX_TRIG
signal high or write to the profile index (Register 0x10C, Bits[0:4]).
The digital block will also switch to the idle state if the power
stop expires when using the advanced power control feature.
Figure 52 illustrates the digital block power saving scheme.
CHIP IN POWER-DOWN,
STANDBY,
OR CW MODE
DIGITAL
DECIMATOR/FILTER
IDLE
DIGITAL
DECIMATOR/FILTER
RUNNING
RUN CHIP
NEGATIVE EDGE TX_TRIG
OR SOFTWARE TX_TRIG
TX_TRIG IS HIGH, PROFILE
INDEX WRITE, OR POWER
STOP EXPIRES
Figure 52. Digital Block Power Saving Scheme



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