AD9772A-EB datasheet(28/40 Pages) AD

28 / 40 page

AD9772A

Rev. C | Page 28 of 40

optimum performance. Care should be taken to ensure that the

ground plane is uninterrupted over crucial signal paths. On the

digital side, this includes the digital input lines running to the

DAC. On the analog side, this includes the DAC output signal,

the reference signal, and the supply feeders.

The use of wide runs or planes in the routing of power lines is

also recommended. This serves the dual role of providing a low

series impedance power supply to the part and allowing some

capacitive decoupling to the appropriate ground plane. It is

essential that care be taken in the layout of signal and power

ground interconnections to avoid inducing extraneous voltage

drops in the signal ground paths. It is recommended that all

connections be short, direct, and as physically close to the

package as possible to minimize the sharing of conduction

paths between different currents. When runs exceed an inch in

length, use of strip line techniques with proper termination

resistors should be considered. The necessity and value of these

resistors depends on the logic family used.

For a more detailed discussion of the implementation and

construction of high speed, mixed-signal printed circuit boards,

refer to the AN-333 Application Note.

AD9772A-EB Datasheet(PDF) 28 Page - Analog Devices