Datasheet

Data Sheet AD7609
Rev. A | Page 33 of 36
To ensure good device-to-device performance matching in a
system that contains multiple AD7609 devices, a symmetrical
layout between the AD7609 devices is important. Figure 62
shows a layout with two AD7609 devices. The AV
CC
supply
plane runs to the right of both devices. The V
DRIVE
supply track
runs to the left of the two AD7609 devices. The reference chip
is positioned between both AD7609 devices and the reference
voltage track runs north to Pin 42 of U1 and south to Pin 42
to U2. A solid ground plane is used. These symmetrical layout
principles can be applied to a system that contains more than
two AD7609 devices. The AD7609 devices can be placed in a
north-to-south direction with the reference voltage located
midway between the AD7609 devices and the reference track
running in the north-to-south direction similar to Figure 62.
09760-059
Figure 62. Multiple AD7609 Layout, Top Layer and Supply Plane Layer