adv7344 Analog Devices, Inc., adv7344 Datasheet - Page 67

• Manufacturer Part Number: adv7344
• Description: Multiformat Video Encoder Six 14-bit Noise Shaped Video Dacs
• Manufacturer: Analog Devices, Inc.

Power Supply Decoupling
It is recommended that each power supply pin be decoupled
with 10 nF and 0.1 μF ceramic capacitors. The V
V
ground. The decoupling capacitors should be placed as close as
possible to the ADV7344 with the capacitor leads kept as short
as possible to minimize lead inductance.
A 1 μF tantalum capacitor is recommended across the V
supply in addition to the 10 nF and 0.1 μF ceramic capacitors.
Power Supply Sequencing
The ADV7344 is robust to all power supply sequencing
combinations. Any particular sequence can be used.
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 V
DD_IO
, and both V
DD
pins should be individually decoupled to
AA
or PV
DD
AA
power planes.
, PV
DD
AA
,
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Due to the high clock rates used, avoid long clock traces to the
ADV7344 to minimize noise pickup.
Any pull-up termination resistors for the digital inputs should
be connected to the V
Any unused digital inputs should be tied to ground.
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 ADV7344.
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.
DD
power supply.
ADV7344