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Maxim > Design Support > Technical Documents > Application Notes > A/D and D/A Conversion/Sampling Circuits > APP 1031
Maxim > Design Support > Technical Documents > Application Notes > Amplifier and Comparator Circuits > APP 1031
Keywords: PWM, DAC, ADC, PIC, microcontroller, uc, MCU, low power, analog digital converter, digital
analog converters, a/d d/a converter
APPLICATION NOTE 1031
Low-Power 3V ADC is 0.05% Linear
Jul 09, 1998
Abstract: This application note describes using a microcontroller (µC) with integrated digital-to-analog
converter (DAC) and comparators to create a low cost ADC that is 0.05% linear.
The simple 3V analog-to-digital converter (ADC) shown in Figure 1 is very small, requires no negative
supply or expensive precision components, and draws minimal supply current (10µA). A single conversion
consists of 12,000 comparisons and takes about 300ms. The circuit operates as described below.
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