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WM8776 Datasheet(PDF) 53 Page - Wolfson Microelectronics plc

Part # WM8776
Description  24-bit, 192kHz Stereo CODEC with 5 Channel I/P Multiplexer
PDF  57 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8776 Datasheet(HTML) 53 Page - Wolfson Microelectronics plc

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Production Data
WM8776
w
PD Rev 4.0 April 2005
53
APPLICATIONS INFORMATION
EXTERNAL CIRCUIT CONFIGURATION
In order to allow the use of 2V rms and larger inputs to the ADC and AUX 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 pulses. Figure 41 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
AIN5L
10K
10uF
AIN1R
10K
10uF
AIN2R
10K
10uF
AIN3R
10K
10uF
AIN4R
10K
10uF
AIN5R
10K
10uF
SOURCE
SELECTOR
INPUTS
AINVGR
AINOPR
5K
AINVGL
AINOPL
5K
Figure 41 ADC Input Multiplexor Configuration
10K
MX[0]
MX[1]
MX[2]
10K
10K
10K
DACL/R
BYPASSL/R
AUXL/R
10uF
AUX input
Figure 42 5.1 Channel Input Multiplexor Configuration



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