参数资料
型号: SAB-C515-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 11/162页
文件大小: 771K
代理商: SAB-C515-LM
Semiconductor Group
6-65
On-Chip Peripheral Components
C515
The external reference voltage supply need only be applied when the A/D converter is used,
otherwise the pins
V
AREF and VAGND may be left unconnected. The reference voltage supply has to
meet some requirements concerning the level of
V
AGND and VAREF and the output impedance of the
supply voltage (see also "A/D Converter Characteristics" in the data sheet).
– The voltage
V
AREF must meet the following specification :
V
AREF
= V
CC + 0.25 V
– The voltage
V
AGND must meet a similar specification :
V
AGND
= V
SS + 0.2 V
– The differential output impedance of the analog reference supply voltage should be less than
1 k
W.
lf the above mentioned operating conditions are not met the accuracy of the converter may be
decreased.
Furthermore, the analog input voltage
V
AINPUT must not exceed the range from (VAGND – 0.2 V) to
(
V
AREF + 0.2 V). Otherwise, a static input current might result at the corresponding analog input
which will also affect the accuracy of the other input channels.
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