參數(shù)資料
型號： ADV7180BSTZ-REEL
廠商： Analog Devices Inc
文件頁數(shù)： 27/116頁
文件大?。?/td> 0K
描述： IC VIDEO DECODER SDTV 64-LQFP
產(chǎn)品變化通告： ADV7180 Metal Mask Edit 22/Oct/2009
設(shè)計資源： Low Cost Differential Video Receiver Using ADA4851 Amplifier and ADV7180 Video Decoder (CN0060)
Low Cost Video Multiplexer for Video Switching Using ADA4853-2 Op Amp with Disable Function (CN0076)
標(biāo)準(zhǔn)包裝： 1
類型： 視頻解碼器
應(yīng)用： 數(shù)碼相機(jī)，手機(jī)，便攜式視頻
安裝類型： 表面貼裝
封裝/外殼： 64-LQFP
供應(yīng)商設(shè)備封裝： 64-LQFP（10x10）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： ADV7180BSTZ-REELDKR
ADV7180
Data Sheet
Rev. I | Page 18 of 116
POWER SUPPLY SEQUENCING
POWER-UP SEQUENCE
The power-up sequence for the ADV7180 is to power up all power
supplies simultaneously. If this is not possible, the 3.3 V supply
(DVDDIO) must be established first. When the 3.3 V supply is stable,
power up the 1.8 V supplies (DVDD, PVDD, and AVDD) as quickly as
possible. Until the 1.8 V supplies are fully established, all digital
pins are in an undefined state.
During power-up, all supplies must adhere to the specifications
Take care to ensure that a lower rated supply does not go above
a higher rated supply. For example, the 3.3 V DVDDIO supply must
never drop below a 1.8 V supply such as the DVDD, PVDD, or AVDD.
To power up the ADV7180, follow these steps.
1. Assert the PWRDWN pin and the RESET pin (that is, pull
the pins low.)
2. Power up the 3.3 V supply (DVDDIO) and 1.8 V supplies
(DVDD, PVDD, and AVDD) simultaneously.1, 2
3. When all supplies are fully asserted, pull the PWRDWN
pin high. Note that this step can be ignored on the 32-lead
LFCSP, as the PWRDWN pin is not available.
4. Wait 5 ms, then pull the RESET pin high.
5. When all power supplies, the PWRDWN pin, and the RESET
pin are powered up and stable, wait an additional 5 ms
before initiating I2C communication with the ADV7180.
POWER-DOWN SEQUENCE
The ADV7180 supplies can be deasserted simultaneously as
long as DVDDIO does not go below a lower rated supply.
UNIVERSAL POWER SUPPLY
The ADV7180 can operate with a DVDDIO supply at a nominal
value of 1.8 V. Therefore, it is possible to power up all the supplies
for the ADV7180 (DVDD, AVDD, PVDD, and DVDDIO) to 1.8 V.
When DVDDIO is at a nominal value of 1.8 V, power up the
ADV7180 in the following manner:
1. Follow the power-up sequence described in the Power-Up
Sequence section, but power up the DVDDIO supply to 1.8 V
instead of 3.3 V. In addition, power up the PWRDWN pin
and the RESET pin to 1.8 V instead of 3.3 V.
2. Set the drive strengths of the digital outputs of the ADV7180
to their maximum setting. See the Global Pin Control section.
3. Connect any pull-up resistors connected to pins on the
ADV7180, such as the SCLK pin and the SDATA pin, to
1.8 V, rather than 3.3 V.
1
If it is not possible to power up the DVDDIO and 1.8 V supplies simultaneously,
the DVDDIO supply must be powered up first. When the DVDDIO is stable, power
up the 1.8 V supplies as quickly as possible.
2
During power-up, take care to ensure that the DVDDIO supply never drops
below any of the 1.8 V supplies.
05700-
100
3.3V
1.8V
V
OLTA
GE
TIME
SUPPLIES
POWER-UP
3.3V SUPPLIES
PWRDWN PIN
POWER-UP
RESET PIN
POWER-UP
5ms
RESET
OPERATION
RESET PIN
1.8V
SUPPLIES
5ms
WAIT
Figure 12. Power-Up Sequence of the 40-Lead LFCSP, 48-Lead LQFP, and 64-Lead LQFP
05700-
101
3.3V
1.8V
V
OLTA
GE
TIME
SUPPLIES
POWER-UP
3.3V SUPPLIES
RESET PIN
POWER-UP
5ms
RESET
OPERATION
RESET PIN
1.8V
SUPPLIES
5ms
WAIT
Figure 13. Power-Up Sequence of the 32-Lead LFCSP
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