Собственно говоря, можно выбрать из этой таблицы Digital Potentiometers на любой вкус http://www.maximintegrated.com/en/produc...eters.html
LOG
http://para.maximintegrated.com/en/searc...am=dig_pot&807=Log%7CPseudo-Log
LIN
http://para.maximintegrated.com/en/searc...am=dig_pot&807=Linear
ADI`s Digital Potentiometers http://www.analog.com/en/digital-to-anal...index.html
INTERSIL http://www.intersil.com/en/products/data...dcps-.html
TI http://www.ti.com/lsds/ti/data-converter...ducts.page
MICROCHIP http://www.microchip.com/paramchartsearc...chid=11026&mid=11&lang=en&pageid=79&redirects=digipots
LOG
http://para.maximintegrated.com/en/searc...am=dig_pot&807=Log%7CPseudo-Log
LIN
http://para.maximintegrated.com/en/searc...am=dig_pot&807=Linear
ADI`s Digital Potentiometers http://www.analog.com/en/digital-to-anal...index.html
INTERSIL http://www.intersil.com/en/products/data...dcps-.html
TI http://www.ti.com/lsds/ti/data-converter...ducts.page
MICROCHIP http://www.microchip.com/paramchartsearc...chid=11026&mid=11&lang=en&pageid=79&redirects=digipots