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MB90350E Datasheet(PDF) 75 Page - Fujitsu Component Limited.

No. de Pieza. MB90350E
Descripción  16-bit Proprietary Microcontrollers
Descarga  85 Pages
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Fabricante  FUJITSU [Fujitsu Component Limited.]
Página de inicio  http://edevice.fujitsu.com/fmd/en/index.html
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MB90350E Datasheet(HTML) 75 Page - Fujitsu Component Limited.

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MB90350E Series
75
Notes on A/D Converter Section
• About the external impedance of the analog input and its sampling time
A/D converter with sample and hold circuit. If the external impedance is too high to keep sufficient sampling
time, the analog voltage charged to the internal sample and hold capacitor is insufficient, adversely affecting
A/D conversion precision. Therefore to satisfy the A/D conversion precision standard, consider the relationship
between the external impedance and minimum sampling time and either adjust the register value and operating
frequency or decrease the external impedance so that the sampling time is longer than the minimum value. Also
if the sampling time cannot be sufficient, connect a capacitor of about 0.1
µF to the analog input pin.
· Analog input equivalence circuit
ON at sampling
Note : The value is reference value.
R
C
Analog input
Comparator
MB90F351E(S), MB90F352E(S), MB90F356E(S), MB90F357E(S),
MB90F351TE(S), MB90F352TE(S),MB90F356TE(S), MB90F357TE(S)
C
R
4.5 V
≤ AVCC ≤ 5.5 V 2.0 kΩ (Max)
16.0 pF (Max)
4.0 V
≤ AVCC ≤ 4.5 V 8.2 kΩ (Max)
16.0 pF (Max)
MB90V340E-101/102/103/104,
MB90351E(S), MB90352E(S),MB90356E(S), MB90357E(S),
MB90351TE(S), MB90352TE(S),MB90356TE(S), MB90357TE(S)
C
R
4.5 V
≤ AVCC ≤ 5.5 V 2.0 kΩ (Max)
14.4 pF (Max)
4.0 V
≤ AVCC ≤ 4.5 V 8.2 kΩ (Max)
14.4 pF (Max)


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