參數(shù)資料
型號(hào)： MB90F497PFM
元件分類(lèi)： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64
封裝： 12 X 12 MM, 0.65 MM PITCH, QFP-64
文件頁(yè)數(shù)： 32/40頁(yè)
文件大小： 484K
代理商： MB90F497PFM
MB90495 Series
MB90495 Series Data Sheet (Advance Information)
38 / 40
FMG EMDC June 19, 2000
14.13 A/D Converter
(TA = –40 to +85
°C, 3.0 V ≤ AVR – AVSS, VCC = AVCC = 5.0 V 10%, VSS = AVSS = 0 V)
*1: When not operating A/D converter, this is the current (VCC = AVCC = AVR = 5.0 V) when the CPU is stopped.
Terminology:
Conversion error :
Absolute maximum conversion deviation with respect to the theoretical conversion line.
Nonlinearlity :
Relative maximum conversion deviation with respect to the theoretical conversion line connecting to
the device-unique zero reading voltage and full-scale reading voltage.
Differential non-linearlity :
Maximum conversion deviation in any two adjacent reading voltages with respect to the theoretical
LSB conversion step.
Zero-reading voltage :
Input voltage which results in the minimum conversion value.
Full-scale reading voltage :
Input voltage which results in the maximum coversion value.
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
VOT
AN0 to AN7
AVSS – 3.5
AVSS +0.5
AVSS + 4.5
LSB
1 LSB =
AVR/1024
Full scale reading voltage
VFST
AN0 to AN7
AVR – 6.5
AVR –1.5
AVR + 1.5
LSB
Conversion time
—
176tCP
—ns
Sampling time
—
64tCP
—ns
Analog port input current
IAIN
AN0 to AN7
—
10
A
Analog input voltage range
VAIN
AN0 to AN7
AVSS
—
AVR
V
Reference voltage range
—
AVR
AVSS + 2.7
—
AVCC
V
Power supply current
IA
AVCC
—
5
—
mA
IAH
AVCC
—
5
A*1
Reference voltage current
IR
AVR
200
400
600
A
IRH
AVR
—
5
A*1
Offset between input channels
—
AN0 to AN7
—
4
LSB
C1
C0
Analog input
Converter
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