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Are there any notes about hardware to achieve an exact A/D conversion?

Latest Updated:03/01/2005

Question:

(A/D Converter)  Are there any notes or suggestions regarding hardware needed to achieve an exact A/D conversion ? [2005/03/01]

Answer:

When performing an A/D conversion, the internal capacitor needs to be fully charged. However, if the impedance of the A/D conversion target is high, charge and discharge will require extra time, resulting in an incorrect conversion value. To achieve an exact A/D conversion, keep the impedance of the signal source connected to the analog input pin as low as possible (10kΩ or lower), and add a 0.1μF capacitor to the analog input pin to suppress the influence of input current generated during A/D conversion. (#104823)

Suitable Products
3803H
3803L
3823
3850A
3858
38D2
38D5
7544
7546
7547
7548
7549
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