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| 型號(hào)： | MB91V280CR |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 32 MHz, RISC MICROCONTROLLER, CPGA401 |
| 封裝： | CERAMIC, PGA-401 |
| 文件頁(yè)數(shù)： | 76/85頁(yè) |
| 文件大?。?/td> | 1090K |
| 代理商： | MB91V280CR |
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MB91270/280 Series
78
6.
Electrical Characteristics for the A/D Converter
Electrical characteristics
(TA : Recommended Operating Conditions, VCC
= 5.0 V ± 10 %, VSS = AVSS = 0.0 V)
*1 : For FCP = 32 MHz, tSMP = (Rext + Rin)
× Cin × 7 = ST × CLKP period = 2 ch × 31.25 ns = 1.375 s
*2 : For FCP = 32 MHz, tCMP = CKIN
× 11 = CT × CLKP period × 11 = 4 h × 31.25 ns × 11 = 1.375 s
*3 : For FCP = 32 MHz, this is equivalent to the conversion time per channel when tSMP and tCMP are selected.
*4 : Specifies the power supply current when the A/D converter is not operating and the CPU is in stop mode
(Vcc = AVcc = AVRH = 5.0 V)
Notes :
The error becomes proportionately larger for lower AVRH voltages.
Use the device with external circuits of the following output impedance rS for analog inputs :
External circuit output impedance rS
= 5 k (Max)
If the output impedance of the external circuit is too high, the analog voltage sampling time may be
insufficient.
If inserting a capacitor between the external circuit and an input pin to prevent direct current flow, select
a capacitance several thousand times larger than CSH to minimize the capacitive voltage divider effect
due to the CSH sampling capacitor in the chip.
Parameter
Sym-
bol
Pin name
Value
Unit
Remarks
Min
Typ
Max
Resolution
10
bit
Total error
± 3.0
LSB
Nonlinear error
± 2.5
LSB
Differential linear error
± 1.9
LSB
Zero transition voltage
VOT
AN0 to
AN23
AVSS
1.5 LSB
AVSS
+ 0.5 LSB
AVSS
+ 2.5 LSB
V
1 LSB
=
(AVRH
AVSS) / 1024
Full-scale transition
voltage
VFST
AN0 to
AN23
AVRH
3.5 LSB
AVRH
1.5 LSB
AVRH
+ 0.5 LSB
V
Sampling time
tSMP
1.375
s*1
Compare time
tCMP
1.375
s*2
A/D conversion time
tCNV
2.750
s*3
Analog port input
current
IAIN
AN0 to
AN23
10
AVAVSS ≤ VAIN ≤ VAVCC
Analog input voltage
VAIN
AN0 to
AN23
0
AVRH
V
Reference voltage
AVRH
4.0
AVCC
V
Power supply current
IA
AVCC
2.4
4.7
mA
IAH
5
A*4
Reference voltage
supplying current
IR
AVRH
600
900
AVAVRH = 5.0 V
IRH
5
A*4
Interchannel disparity
AN0 to
AN31
4LSB
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