Datasheet

Data Sheet AD7608
Rev. A | Page 31 of 32
To ensure good device-to-device performance matching, in a
system that contains multiple AD7608 devices, a symmetrical
layout between the AD7608 devices is important.
Figure 61 shows a layout with two 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 devices. The reference chip
is positioned between both the two 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 AD7608 devices. The AD7608
devices can be placed in a north-south direction with the reference
voltage located midway between the AD7608 devices with the
reference track running in the north-south direction similar to
Figure 61.
AVCC
U2
U1
U2
U1
08938-053
Figure 61. Layout for Multiple AD7608 Devices—Top Layer and
Supply Plane Layer