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WM8775 データシート(PDF) 33 Page - Wolfson Microelectronics plc

部品番号 WM8775
部品情報  24 BIT 96 KHZ ADC WITH 4 CHANNEL I/P MULTIPLEXER
PDF  36 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8775 データシート(HTML) 33 Page - Wolfson Microelectronics plc

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WM8775
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PP Rev 1.8, June 2004
33
APPLICATIONS INFORMATION
EXTERNAL CIRCUIT CONFIGURATION
In order to allow the use of 2V rms and larger inputs to the ADC inputs, a structure is used that uses
external resistors to drop these larger voltages. This also increases the robustness of the circuit to
external abuse such as ESD pulse. Figure 25 shows the ADC input multiplexor circuit with external
components allowing 2Vrms inputs to be applied.
AIN1L
10K
10uF
AIN2L
10K
10uF
AIN3L
10K
10uF
AIN4L
10K
10uF
AIN1R
10K
10uF
AIN2R
10K
10uF
AIN3R
10K
10uF
AIN4R
10K
10uF
SOURCE
SELECTOR
INPUTS
AINVGR
AINOPR
5K
AINVGL
AINOPL
5K
Figure 25 ADC Input Multiplexor Configuration



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