text: <s>[INST] Choose Kinetix 300 or Ultra 3000? I want to buy an MPL-A330P motor, which drive should I choose. I have an analog motion controller, like 1756-M02AE. All I need is a servo drive that supports analog reference and can provide AB quadrature encoder signals to my controller. The resolution of Ultra3000's analog input is 14 bits. The resolution of the analog input of Kinetix 300 is 12 bits. 1. Can 12bits meet high-precision positioning requirements? 2. In addition to the analog resolution, what is the difference between Kinetix 300 and Ultra 3000, and which one should I choose? [/INST] While Ultra3000 servo drives are technically still available to purchase, Rockwell's product lifecycle page lists them as active mature. This means they will be phased out sooner rather than later. I would not design a new system using a drive that is soon to be obsolete, so would go for the Kinetix 300 drive. 12 bits would mean approximately 1mV / count, or .002ma / count. Is your analog control capable of that performance? \\n </s>