AD5280 datasheet(19/28 Pages) AD

Part #	AD5280

Description	Single/Dual,15 V/5 V,256-Position I2C-Compatible Digital Potentiometer

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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19 / 28 page

AD5280/AD5282

Rev. C | Page 19 of

LAYOUT AND POWER SUPPLY BYPASSING

It is a good practice to design a layout with compact, minimum

lead lengths. The leads to the input should be as direct as possible

with a minimum conductor length. Ground paths should have

low resistance and low inductance.

AD5280/

AD5282

VDD

VSS

VDD

VSS

GND

10µF

0.1µF

10µF

0.1µF

Similarly, it is also a good practice to bypass the power supplies

with quality capacitors for optimum stability. Supply leads to

the device should be bypassed with 0.01 μF to 0.1 μF disc or

chip ceramic capacitors. Low ESR 1 μF to 10 μF tantalum or

electrolytic capacitors should also be applied at the supplies to

minimize any transient disturbance and filter low frequency

ripple (see Figure 54). Notice that the digital ground should also

be joined remotely to the analog ground at one point to

minimize digital ground bounce.

Figure 54. Power Supply Bypassing

AD5280 Datasheet(PDF) 19 Page - Analog Devices