參數(shù)資料
型號(hào)： EVAL-ADV7842EB1Z
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 4/28頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADV7842EB1Z
標(biāo)準(zhǔn)包裝： 1
系列： *
ADV7842
Rev. B | Page 12 of 28
POWER SUPPLY SEQUENCING
POWER-UP SEQUENCE
The recommended power-up sequence of the ADV7842 is as
follows:
1. 3.3 V supplies
2. 2.5 V supply (applies only if using DDR memory)
3. 1.8 V supplies
08849-
009
3.3V SUPPLIES
POWER-UP
PO
W
ER
SU
PPL
Y
(V)
3.3V SUPPLIES
1.8V SUPPLIES
2.5V SUPPLIES (IF ANY)
2.5V SUPPLIES
POWER-UP
1.8V SUPPLIES
POWER-UP
3.3V
2.5V
1.8V
Figure 7. Recommended Power-Up Sequence
Notes
Reset should be held low while the supplies are being powered up.
3.3 V supplies should be powered up first.
2.5 V supply should be powered after the 3.3 V supplies are
established but before the 1.8 V supplies.
1.8 V supplies should be powered up last.
The ADV7842 can alternatively be powered up by simulta-
neously asserting all supplies.
In this case, care must be taken to ensure that a lower rated supply
does not go above a higher rated supply level, because the supplies
are being established.
POWER-DOWN SEQUENCE
The ADV7842 supplies can be deasserted simultaneously as
long as a higher rated supply does not go below a lower rated
supply.
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