Nonvolatile, 32-Position Digital Potentiometer

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cycled to the device, the wiper setting that was just

stored is the setting loaded on power-up.

Wiper storage does not have to occur immediately after

a change in wiper position. At anytime the current wiper

position can be stored to the EEPROM by simply issu-

remains in a high state. The wiper does not move dur-

ing this action and the current wiper setting is stored in

For applications that require a specific wiper setting to

be loaded on power-up and never changed, write the

desired wiper setting to the EEPROM, then tie CS to

desired wiper setting is loaded from EEPROM, and

the wiper setting.

EEPROM Characteristics

There is a limit to the number of times the EEPROM can

be written to before a wear-out occurs (see the

Nonvolatile Memory Characteristics table). After EEP-

ROM wear-out occurs, the wiper can still be adjusted,

however accurately storing the wiper position is no

longer possible. When power is removed from the part,

the current wiper position is lost. Upon power-up, the

the wiper setting that is loaded is unknown.

Application Information

To achieve the best results when using the DS4301,

decouple the power supply with a 0.01µF or 0.1µF

capacitor. Use a high-quality ceramic surface-mount

capacitor when possible. Surface-mount components

minimize lead inductance, improving performace.

Ceramic capacitors tend to have adequate high-

frequency response for decoupling applications.

Chip Information

TRANSISTOR COUNT: 3512

SUBSTRATE INFO: P-substrate

Package Information

For the latest package outline information, go to

www.maxim-ic.com/DallasPackInfo.