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Maxim > Design Support > Technical Documents > Application Notes > A/D and D/A Conversion/Sampling Circuits > APP 111
Keywords: digital-to-analog converter, DAC, voltage switching, voltage-output DAC
APPLICATION NOTE 111
Dual, Voltage-Output DAC Consumes Miniscule Power
Jan 21, 2002
Abstract: This design note shows a circuit that modifies a dual, voltage-output digital-to-analog converter (DAC) to
save power and draw less than 20µA from a 5V supply. This circuit is useful for programmable voltage generation in
slow or static applications, such as the nulling of offsets in a micropower instrument.
A similar version of this article appeared in Electronic Design magazine.
The dual, voltage-output DACs shown in the figure below employ a combination of power-conserving tricks to draw
less than 20µA from a 5V supply. The circuit suits a need for programmable voltage generation in slow or static
applications, such as the nulling of offsets in a micropower instrument.
Providing two independent 8-bit DACs with voltage outputs and a common reference, this dual-DAC circuit draws less
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