MB95F613K datasheet(100/110 Pages) CYPRESS

100 / 110 page

Document Number: 002-04698 Rev. *A

Page 100 of 110

PRELIMINARY

MB95610H Series

18.5.2 Notes on Using A/D Converter

■ External impedance of analog input and its sampling time

The A/D converter of the MB95610H Series has a sample and hold circuit. If the external impedance is too high to keep sufficient

sampling time, the analog voltage charged to the capacitor of the internal sample and hold circuit is insufficient, adversely affecting

A/D conversion precision. Therefore, to satisfy the A/D conversion precision standard, considering the relationship between the

external impedance and minimum sampling time, either adjust the register value and operating frequency or decrease the external

impedance so that the sampling time is longer than the minimum value. In addition, if sufficient sampling time cannot be secured,

connect a capacitor of about 0.1 µF to the analog input pin.

Note: The values are reference values.

4.5 V

≤ VCC ≤ 5.5 V

2.7 V

≤ VCC < 4.5 V

1.45 k

Ω (Max)

2.7 k

Ω (Max)

14.89 pF (Max)

VCC

14.89 pF (Max)

Comparator

Analog input

During sampling: ON

• Analog input equivalent circuit

MB95F613K Datasheet(PDF) 100 Page - Cypress Semiconductor