MB90347CE datasheet(68/84 Pages) FUJITSU

Nome de Peças	MB90347CE

Descrição Electrónicos	16-bit Microcontroller

PDF	84 Pages

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Fabricante Electrônico	FUJITSU [fujitsu semiconductor]

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68 / 84 page

MB90340E Series

Notes on A/D Converter Section

Use the device with external circuits of the following output impedance for analog inputs :

Recommended output impedance of external circuits are : Approx. 1.5 k

Ω or lower (4.0 V ≤ AVCC ≤ 5.5 V,

sampling period

= 0.5 µs)

If an external capacitor is used, in consideration of the capacitive voltage dividing effect between the external

capacitor and the internal on-chip capacitor, it is recommended that the capacitance of the external capacitor

be several thousand times greater than the capacitance of the internal capacitor.

If the output impedance of the external circuit is too high, a sampling period for an analog voltage may be

insufficient.

Comparator

Analog input

4.5 V

≤ AVCC ≤ 5.5 V : R := 2.52 kΩ, C := 10.7 pF

4.0 V

≤ AVCC < 4.5 V : R := 13.6 kΩ, C := 10.7 pF

• Analog input circuit model

Note : Use the values in the figure only as a guideline.

MB90347CE Folha de dados(PDF) 68 Page - fujitsu semiconductor