Deglitching Techniques for High-Voltage R-2R DACs

Posted on Apr 10, 2012

In an R-2R DAC design with supply voltages exceeding ±5V, large voltage glitches (up to 1.5V) can occur during the DAC`s major-carry transitions. These glitches can propagate through the output buffer amplifier and appear at output. The slewing of the level shifters that control the top (VREF+) and bottom (VREF-) single-pole double-throw switches (S0 to SN) causes the glitches (Figure 1).

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