The ADN2850 provides dual channel, digitally controlled programmable resistors2 with resolution of 1024 positions. These devices perform the same electronic adjustment function as a mechanical rheostat. The ADN2850's versatile programming via a standard serial interface allows sixteen mode of operations and adjustment including scratch pad programming, memory storing and retrieving, increment/decrement, log taper adjustment, wiper setting readback, and extra user defined EEMEM.