AD7722ASZ Analog Devices Inc, AD7722ASZ Datasheet - Page 22

• Manufacturer Part Number: AD7722ASZ
• Description: ADC Single Delta-Sigma 195KSPS 16-Bit Parallel/Serial 44-Pin MQFP
• Manufacturer: Analog Devices Inc

Specifications of AD7722ASZ

• Package: 44MQFP
• Resolution: 16 Bit
• Sampling Rate: 195 KSPS
• Architecture: Delta-Sigma
• Number Of Analog Inputs: 1
• Digital Interface Type: Parallel|Serial (3-Wire)
• Input Type: Voltage
• Polarity Of Input Voltage: Unipolar|Bipolar
• Number Of Bits: 16
• Sampling Rate (per Second): 220k
• Data Interface: Serial, Parallel
• Number Of Converters: 1
• Power Dissipation (max): 375mW
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7722
the analog and digital systems. Fast switching signals like clocks
should be shielded with their associated ground to avoid radiating
noise to other sections of the board, and clock signals should
never be routed near the analog inputs.
Avoid running digital lines under the device as these will couple
noise onto the die. The analog ground plane should be allowed
to run under the AD7722 to shield it from noise coupling. The
power supply lines to the AD7722 should use as large a trace as
possible (preferably a plane) to provide a low impedance path
and reduce the effects of glitches on the power supply line.
Avoid crossover of digital and analog signals. Traces on opposite
sides of the board should run at right angles to each other. This
will reduce the effects of feedthrough through the board.
–22–
5V
10 F
Figure 29. Power Supply Decoupling
100nF
100nF
10 F
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100nF
100nF
100nF
10
1nF
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39
28
5
AV
AGND1
AV
AGND
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DV
DGND
DGND
REV. B
DD
DD
DD
DD
1