WMS7201

The WMS7201 is a 256-tap, single-channel non-volatile digital potentiometer available in 10K, 50K and 100K end--end resistances. These devices can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications.   

The output of the potentiometer of the WMS7201 is determined by the wiper position, which varies linearly between VA and VB rminal to the content stored in the volatile Tap Register (TR). The settings of the TR can be provided either directly y the user ugh the industry standard SPI interface, or by the non-volatile memory (NVMEM0~3) where the revious settings are stored. When changes are made to the TR to establish a new wiper position, the value of the setting can be saved into any n-volatile memory location (NVMEM0~3) by executing a NVMEM save operation. Upon powerup the content of the VMEM0 is automatically loaded to the Tap Register. 

The WMS7201 contains a single potentiometer in 8-pin PDIP, SOIC, MSOP or 10 pin TSSOP packages and can operate r a wide operating voltage range from 2.7V to 5.5V. A selectable output buffer is built-in for those applications where an output buffer is required.