參數(shù)資料
型號: SAB83C517A-N18-T4
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 18 MHz, MICROCONTROLLER, PQCC84
封裝: PLASTIC, LCC-84
文件頁數(shù): 70/137頁
文件大?。?/td> 2089K
代理商: SAB83C517A-N18-T4
Semiconductor Group
5 - 3
On-Chip Peripheral Components
5.2
10-bit A/D-Converter
In the SAB 80C517A is a new high performance / high speed 12-channel 10-bit A/D-Converter is
implemented. Its successive approximation techniqe provides 7
s conversion time (f
OSC=16 MHz).
The conversion principle is upward compatible to the one used in the SAB 80C517. The major
components are shown in figure 5-1.
The comparator is a fully differential comparator for a high power supply rejection ratio and very low
offset voltages. The capacitor network is binary weighted providing 10-bit resolution.
The table 5-1 below shows the sample time
T
S and the conversion time TC (including TS), which
depend on
f
OSC and the selected prescaler (see also Bit ADCL in SFR ADCON 1).
Table 5-1, ADC-Convertion Time
f
OSC[MHz]
Prescaler
f
ADC[MHz]
T
S [s]
T
C [s]
(incl.
T
S)
12
÷ 8
1.5
1.33
8
÷ 16
0.75
2.8
16
÷ 8
2.0
7.0
÷ 16
1.0
4.0
14.0
18
÷ 8
–––
÷ 16
1.125
3.555
12.4
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