This tutorial examines the most fundamental DAC architectures, the "string" DAC and the "thermometer" DAC. String DACs had their origin with Lord Kelvin, who invented the Kelvin divider in the mid-1800s. String DACs are popular today, especially in applications such as digital potentiometers where resolutions of 6 to 8 bits are typical.

Oct 3, 2014 · Three precision DAC architectures: string DAC (a); R-2R DAC (b); and multiplying DAC or MDAC (c). These architectures are the string DAC, R-2R DAC, and multiplying DAC. In all cases, these devices use a digital input code to generate an analog output signal.

Oct 10, 2007 · There are two principle architectures used in today's precision DACs, the R2R and string. Both architectures are analog circuits with some digital control logic. With a basic R2R architecture, it is possible to either generate a current output or a voltage output.

Apr 4, 2016 · This video explains the string precision DAC architecture, starting with an overview of the architecture, followed by a circuit analysis of the DAC internals and a look at common specs for string architecture DACs.

Three of the DAC topologies that. DAC, and the string DAC. These three topolo-gies service applications such as automatic test equipment, instrumentation, portable equip-ment, and digitally controlled calibration.

DAC Architectures • Type of Classification may not be unique nor mutually exclusive • Structure is not mutually exclusive • All approaches listed are used (and probably some others as well) • Some are much more popular than others – Popular Architectures • Resistor String (interpolating) • Current Source Steering (with segmentation)

Resistor-String DAC –28– • Simple, inherently monotonic →good DNL performance • Complexity ↑speed ↓for large N, typically N ≤8 bits

mathematical analysis of the unbuffered segmented string DAC can be found in the relevant patent filed by Dennis Dempsey and Christopher Gorman of Analog Devices in 1997 (Reference 1).

The simplest structure of all is the Kelvin divider or string DAC as shown in Figure 6.2. An N-bit version of this DAC simply consists of 2 N equal resistors in series and 2 N switches (usually CMOS), one between each node of the chain and the output.

This tutorial examines the most fundamental DAC architectures, the "string" DAC and the "thermometer" DAC. String DACs had their origin with Lord Kelvin, who invented the Kelvin divider in the mid-1800s.