The Many Scale Factors of the AD855 R—2R Ladder Network

In Vol. 5, No. 2 of Dialogue, the matter of voltage switches and R−2R resistive ladder networks for D−A conversion and 2- or 4-quadrant hybrid multiplication was discussed in some depth, with particular reference to the AD555 12-bit quad voltage switches and the AD855 12-bit R−2R resistive ladder network. As a reminder of that article, we reproduce here its "Figure 3" showing the connection of these devices as a 2-quadrant 12-bit multiplier (Unipolar digital number X bipolar analog signal). Read full article