MB95F126JBPFR-GE1 Fujitsu, MB95F126JBPFR-GE1 Datasheet - Page 64

• Manufacturer Part Number: MB95F126JBPFR-GE1
• Description: MCU, 8-BIT, 8FX, 32K FLASH, QFP100
• Manufacturer: Fujitsu

Specifications of MB95F126JBPFR-GE1

• Controller Family/series: F2MC-8FX
• No. Of I/o's: 87
• Ram Memory Size: 1KB
• Cpu Speed: 16.25MHz
• No. Of Timers: 7
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External Only

MB95120MB Series
64
(2) Notes on Using A/D Converter
• About the external impedance of analog input and its sampling time
• About errors
• Analog input equivalent circuit
• The relationship between external impedance and minimum 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.
As |AV
Note : The values are reference values.
Analog input
(External impedance = 0 kΩ to 100 kΩ)
CC
100
− AV
90
80
70
60
50
40
30
20
10
0
0
SS
| becomes smaller, values of relative errors grow larger.
Minimum sampling time [μs]
2
During sampling : ON
4
AV
CC
6
≥ 4.5 V
AV
8
CC
10
≥ 4.0 V
12
14
R
4.5 V ≤ AVcc ≤ 5.5 V
4.0 V ≤ AVcc < 4.5 V
C
(External impedance = 0 kΩ to 20 kΩ)
Comparator
20
18
16
14
12
10
8
6
4
2
0
0
Minimum sampling time [μs]
2.0 kΩ (Max)
8.2 kΩ (Max)
AV
CC
1
R
≥ 4.5 V
2
AV
16 pF (Max)
16 pF (Max)
CC
≥ 4.0 V
3
C
DS07-12610-5E
4