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How much input impedance in analog input/output impedance expected?

Latest Updated:03/01/2005

Question:

(A/D Converter)  How much input impedance is there for analog input? And, what kind of output impedance value should be expected? [2005/03/01]

Answer:

Since input impedance is a non-linear characteristic of the A/D conversion circuit, we can provide no specifications.
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 which will suppress the influence of input current generated during A/D conversion. (#104821)
Suitable Products
3803H
3803L
3823
3850A
3858
38D2
38D5
7544
7546
7547
7548
7549