EVAL-AD7960FMCZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-AD7960FMCZ' PDF : 24 Pages View PDF
AD7960
APPLICATIONS INFORMATION
LAYOUT
Design the printed circuit board that houses the AD7960 so that
the analog and digital sections are separated and confined to
certain areas of the board. Avoid running digital lines under the
device because these couple noise onto the device unless a
ground plane under the AD7960 is used as a shield. Do not run
fast switching signals, such as CNV± or CLK±, near analog
signal paths. Avoid crossover of digital and analog signals. Use
at least one ground plane. It can be common or split between
the digital and analog sections. In the latter case, join the planes
underneath the AD7960 devices.
The AD7960 voltage reference input pin, REF, has dynamic
input impedance. Decouple REF with minimal parasitic
inductances by placing the reference decoupling ceramic
capacitor close to and, ideally, right up against the REF and
Data Sheet
REF_GND pins and connecting them with wide, low impedance
traces.
Finally, decouple the VDD1, VDD2, and VIO power supplies of
the AD7960 with ceramic capacitors, typically 100 nF, placed
close to the AD7960 and connected using short, wide traces to
provide low impedance paths and to reduce the effect of glitches
on the power supply lines.
EVALUATING AD7960 PERFORMANCE
Other recommended guidelines for the AD7960 schematic and
layout are outlined in the user guide of the EVAL-AD7960FMCZ
board (UG-490). The fully assembled and tested evaluation
board, user guide, and software for controlling the EVAL-
AD7960FMCZ board from a PC via the EVAL-SDP-CH1Z are
available from the Analog Devices website at www.analog.com.
Rev. C | Page 22 of 24
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