Network with multiple adjustment elements and sensitivities, and digital-to-analog converter implementing same

A digital-to-analog converter comprising:

• an input node;
• switches providing an input digital signal;
• an output node;
• a resistance ladder coupled to the switches, the ladder including branches corresponding respectively to bit positions, in which selective operation of the switches in response to the input digital signal produces a corresponding analog output signal at an output node;
• said ladder comprising regular branches and merged branches and being constructed from identical fixed resistors and identical trim resistors;
• said regular branches each comprising one or more mutually identical fixed resistors and trim elements, the trim elements being of mutually equal value before any trimming and each comprising two or more trim resistors;
• said regular branch comprising a number of trim elements equal to the number of fixed elements;
• said merged branches each comprising N mutually identical fixed resistors and one merged trim element, where N is an integer equal to or greater than 2, in which prior to any trimming, the merged trim element has substantially the same value as a composite value of N trim elements of a regular branch, and wherein the merged trim element comprises fewer trim resistors than a corresponding group of N trim elements.