AD7699 Analog Devices, AD7699 Datasheet - Page 26

• Manufacturer Part Number: AD7699
• Description: 16-Bit, 8-Channel, 500 kSPS PulSAR ADC
• Manufacturer: Analog Devices

Specifications of AD7699

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (Vref) p-p,4 V p-p,Bip (Vref) x 0.5,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

AD7699
APPLICATION HINTS
LAYOUT
The printed circuit board that houses the
designed so that the analog and digital sections are separated
and confined to certain areas of the board. The pinout of the
AD7699, with all its analog signals on the left side and all its
digital signals on the right side, eases this task.
Avoid running digital lines under the device because these couple
noise onto the die unless a ground plane under the
used as a shield. Fast switching signals, such as CNV or clocks,
should not run near analog signal paths. Crossover of digital
and analog signals should be avoided.
At least one ground plane should be used. It can be common or
split between the digital and analog sections. In the latter case,
the planes should be joined underneath the AD7699.
The
impedance and should be decoupled with minimal parasitic
AD7699
voltage reference input, REF, has a dynamic input
AD7699
should be
AD7699
is
Rev. A | Page 26 of 28
inductances. This is done by placing the reference decoupling
ceramic capacitor close to, ideally right up against, the REF and
GND pins and connecting them with wide, low impedance traces.
Finally, the power supplies, VDD and VIO, of the
should be decoupled with ceramic capacitors, typically 100 nF,
placed close to the
traces to provide low impedance paths and to reduce the effect
of glitches on the power supply lines.
EVALUATING AD7699 PERFORMANCE
Other recommended layouts for the
documentation of the evaluation board for the
AD76MUXCBZ). The evaluation board package includes a fully
assembled and tested evaluation board, documentation, and
software for controlling the board from a PC via the evaluation
controller board,
EVAL-CONTROL
AD7699
and connected using short, wide
AD7699
BRD3.
are outlined in the
Data Sheet
AD7699
AD7699
(EVAL-