參數(shù)資料
型號: ADC12138CIWM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: ADC
英文描述: 1.2UF/100VDC METAL POLY CAP
中文描述: 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO28
封裝: SSOP-28
文件頁數(shù): 32/41頁
文件大?。?/td> 1085K
代理商: ADC12138CIWM
Application Hints
(Continued)
3.0 REFERENCE VOLTAGE
The difference in the voltages applied to the V
REF+
and
V
REF
defines the analog input span (the difference between
the voltage applied between two multiplexer inputs or the
voltage applied to one of the multiplexer inputs and analog
ground), over which 4095 positive and 4096 negative codes
exist. The voltage sources driving V
REF+
or V
REF
must have
very low output impedance and noise. The circuit in Figure
16 is an example of a very stable reference appropriate for
use with the device.
DS012079-41
FIGURE 14. Pseudo-Differential Biasing without the Loss of Digital Output Range
DS012079-42
FIGURE 15. Fully Differential Biasing
A
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