參數(shù)資料
型號(hào)： F497
廠商： Fujitsu Limited
英文描述： 16-bit Proprietary Microcontroller CMOS
中文描述： 16位微控制器專有的CMOS
文件頁數(shù)： 38/40頁
文件大小： 484K
代理商： F497
MB90495 Series
MB90495 Series Data Sheet (Advance Information)
38 / 40
FMG EMDC June 19, 2000
14.13 A/D Converter
(T
A
= –40 to +85
°
C, 3.0 V
≤
AVR – AVSS, V
CC
= AV
CC
= 5.0 V 10%, V
SS
= AV
SS
= 0 V)
*1: When not operating A/D converter, this is the current (V
CC
= AV
CC
= AVR = 5.0 V) when the CPU is stopped.
Terminology:
Conversion error :
Nonlinearlity :
Absolute maximum conversion deviation with respect to the theoretical conversion line.
Relative maximum conversion deviation with respect to the theoretical conversion line connecting to
the device-unique zero reading voltage and full-scale reading voltage.
Maximum conversion deviation in any two adjacent reading voltages with respect to the theoretical
LSB conversion step.
Input voltage which results in the minimum conversion value.
Input voltage which results in the maximum coversion value.
Differential non-linearlity :
Zero-reading voltage :
Full-scale reading voltage :
Notes:
1. The accuracy gets worse as AVR - AVSS becomes smaller.
2. Analog input external circuit output impedance should use the following conditions:
External circuit output impedance less than 15 k
3. If the external circuit output impedance is too high, there may be insufficient time for sampling of the analog voltage.
Figure 14.15 Analog Input pin
Parameter
Symbol
Pin
Rated Value
Units
Remarks
Min.
Typ.
Max.
Resolution
—
—
—
10
bit
Conversion error
—
—
—
—
5.0
LSB
Nonlinearity error
—
—
—
—
2.5
LSB
Differential nonlinearity error
—
—
—
—
1.9
LSB
Zero reading voltage
V
OT
AN0 to AN7
AVSS – 3.5
AVSS +0.5
AVSS + 4.5
LSB
1 LSB =
AVR/1024
Full scale reading voltage
V
FST
AN0 to AN7
AVR – 6.5
AVR –1.5
AVR + 1.5
LSB
Conversion time
—
—
—
176t
CP
—
ns
Sampling time
—
—
—
64t
CP
—
ns
Analog port input current
I
AIN
AN0 to AN7
—
—
10
μ
A
Analog input voltage range
V
AIN
AN0 to AN7
AVSS
—
AVR
V
Reference voltage range
—
AVR
AVSS + 2.7
—
AVCC
V
Power supply current
I
A
AVCC
—
5
—
mA
I
AH
AVCC
—
—
5
μ
A
*1
Reference voltage current
I
R
AVR
200
400
600
μ
A
I
RH
AVR
—
—
5
μ
A
*1
Offset between input channels
—
AN0 to AN7
—
—
4
LSB
C
1
C
0
Analog input
Converter
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