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參數(shù)資料
| 型號(hào)： | EVAL-ADV739XFEZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 78/108頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADV739XFEZ |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | Advantiv® |
| 主要目的： | 視頻，視頻處理 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADV7403 |
| 主要屬性： | NTSC/PAL 數(shù)字視頻解碼器 |
| 次要屬性： | 前端板，用于 ADV7390、ADV7391、ADV7392 和 ADV7393 編碼器背端板 |
| 已供物品： | 板 |
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Data Sheet
ADV7390/ADV7391/ADV7392/ADV7393
Rev. G | Page 71 of 108
Power Supply Decoupling
It is recommended that each power supply pin be decoupled
with 10 nF and 0.1 F ceramic capacitors. The VAA, PVDD,
VDD_IO, and both VDD pins should be individually decoupled to
ground. The decoupling capacitors should be placed as close as
possible to the ADV739x with the capacitor leads kept as short
as possible to minimize lead inductance.
A 1 F tantalum capacitor is recommended across the VAA
supply in addition to the 10 nF and 0.1 F ceramic capacitors.
Power Supply Sequencing
The ADV739x is robust to all power supply sequencing combin-
ations. Any sequence can be used. However, all power supplies
should settle to their nominal voltages within one second.
Digital Signal Interconnect
The digital signal traces should be isolated as much as possible
from the analog outputs and other analog circuitry. Digital
signal traces should not overlay the VAA or PVDD power plane.
Due to the high clock rates used, avoid long clock traces to the
ADV739x to minimize noise pickup.
Any pull-up termination resistors for the digital inputs should
be connected to the VDD_IO power supply.
Analog Signal Interconnect
DAC output traces should be treated as transmission lines with
appropriate measures taken to ensure optimal performance (for
example, impedance matched traces). The DAC output traces
should be kept as short as possible. The termination resistors on
the DAC output traces should be placed as close as possible to,
and on the same side of the PCB as, the ADV739x.
To avoid crosstalk between the DAC outputs, it is recommended
that as much space as possible be left between the traces
connected to the DAC output pins. Adding ground traces
between the DAC output traces is also recommended.
ADDITIONAL LAYOUT CONSIDERATIONS FOR THE
WLCSP PACKAGE
Due to the high pad density and 0.5 mm pitch of the WLCSP, it
is not recommended that connections to inner bumps be routed
on the top PCB layer only.
The traces (track and space) must fit within the limits of the
solder mask openings. Routing all traces on the top surface
layer of the board, while possible, is usually not a feasible
solution due to the limitations of the geometries imposed by
the board fabrication technology. Given a pitch of 0.5 mm with
a typical solder mask opening diameter of 0.35 mm, there is only
a 0.15 mm distance between the solder mask openings.
An alternative to routing on the top surface is to route out on
buried layers. To achieve this, the pads are connected to the
lower layers using microvias. See the AN-617 Application Note,
MicroCSP Wafer Level Chip Scale Package for additional details
about the board layout for the WLCSP package.
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