Datasheet

AD9514
Rev. 0 | Page 24 of 28
Exposed Metal Paddle
The exposed metal paddle on the AD9514 package is an
electrical connection, as well as a thermal enhancement. For the
device to function properly, the paddle must be properly
attached to ground (GND).
The exposed paddle of the AD9514 package must be soldered
down. The AD9514 must dissipate heat through its exposed
paddle. The PCB acts as a heat sink for the AD9514. The PCB
attachment must provide a good thermal path to a larger heat
dissipation area, such as a ground plane on the PCB. This
requires a grid of vias from the top layer down to the ground
plane (see
Figure 34). The AD9514 evaluation board
(AD9514/PCB) provides a good example of how the part
should be attached to the PCB.
05596-035
VIAS TO GND PLANE
Figure 34. PCB Land for Attaching Exposed Paddle
POWER MANAGEMENT
In some cases the AD9514 can be configured to use less power
by turning off functions that are not being used.
The power-saving options include the following:
• Any divider is powered down when set to divide = 1
(bypassed).
• Adjustable delay block on OUT2 is powered down when in
off mode (S0 = 0).
• In some cases, an unneeded output can be powered down
(see
Table 11). This also powers down the divider for that
output.