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Using Digi pot AD8400ARZ1

Category: Datasheet/Specs
Product Number: AD8400ARZ1

 I would like to use multiple devices of digital pots 'AD8400ARZ1' ; the resultant resistance adding in series as well as in parallel of each. This is to increase step and achieve more resolution. My question is it feasible?  does it making sese, seems the application team or design team of this IC can answer this question. 

ON other hand practically any body successfully using more number of  digital pots AD8400ARZ1 to achieve more number of steps?

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