參數(shù)資料
型號(hào): MB90F474LPF
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, QFP-100
文件頁數(shù): 12/118頁
文件大?。?/td> 1199K
代理商: MB90F474LPF
MB90470 Series
109
Notes :
VCC = VCC3 = VCC5
The relative error increases as |AVRH AVSS| is reduced.
Observe the following conditions in applying output impedance on the external circuits of the analog
input.
Output impedance on the external circuit is recommended to be 6 k
or less.
If external capacitance is used, it is recommended that this be several thousand times the level of internal
capacitors in view of the effects of voltage division between the external capacitor and the interior of the
chip.
If the output impedance of the external circuits is too high, the analog voltage sampling time may be
insufficient.
(sampling time
= 3.00 s at machine clock frequency 20 MHz) .
< Reference Data >
Analog Input Circuit
A/D Operating Frequency Restrictions
Supply voltage
A/D conversion time [
s]
Machine clock frequency
3.6 V
≥ AVCC ≥ 3.0 V
4.650
20 MHz
3.6 V
≥ AVCC ≥ 2.7 V
5.813
16 MHz
2.7 V
> AVCC ≥ 2.6 V
6.643
14 MHz
2.6 V
> AVCC ≥ 2.5 V
7.750
12 MHz
2.5 V
> AVCC ≥ 2.4 V
8.455
11 MHz
2.4 V
> AVCC ≥ 2.3 V
9.300
10 MHz
2.3 V
> AVCC ≥ 2.2 V
11.63
8 MHz
2.2 V
> AVCC ≥ 2.1 V
15.50
6 MHz
2.1 V
> AVCC ≥ 2.0 V
23.25
4 MHz
2.0 V
> AVCC ≥ 1.9 V
46.50
2 MHz
1.9 V
> AVCC ≥ 1.8 V
93.00
1 MHz
RON1
RON2
RON3
RON4
C0
C1
Analog input
Comparator
Sample and hold circuit
Note : Values shown here are intended as guidelines.
Model analog input circuit
RON1 : approx. 5 k
RON2 : approx. 617
RON3 : approx. 617
RON4 : approx. 473
C0 : approx. 35 pF
C1 : approx. 2 pF
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