AN3023

Design recommendations

Doc ID 16113 Rev 1

21/23

5

Design recommendations

The main design recommendations for using the analog-to-digital converter are listed below.

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Grounding of analog/digital power

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implement star topology

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implement RC, LC filtering

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avoid noise from digital power supply

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reference voltage source precision and stability to correspond to the required

precision in the application and the ADC’s capability

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reference voltage source value and precision to correspond to the expected

measurement range

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Source impedance vs. input impedance knowledge

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use input buffers for measured signal

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impedance relation with required conversion speed

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External preamplifier usage

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for low (and also high) level signals

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amplifier speed and precision properties

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amplifier dependency on frequency

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Appropriate ADC mode, speed and trigger to be selected