WM8771FTV View Datasheet(PDF) - Wolfson Microelectronics plc

Part Name

Description

MFG CO.

WM8771FTV

24-bit, 192kHz 8-Channel Codec

Wolfson Microelectronics plc 

Product Preview

WM8771

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 pulse.

Figure 35 shows the ADC input multiplexor circuit with external components allowing 2Vrms inputs to

be applied.

5K

10uF 10K

10uF 10K

10uF 10K

AINOPL

AINVGL

AIN1L

AIN2L

AIN3L

10uF 10K

10uF 10K

AIN7L

AIN8L

SOURCE

SELECTOR

INPUTS

5K

10uF 10K

10uF 10K

10uF 10K

AINOPR

AINVGR

AIN1R

AIN2R

AIN3R

10uF 10K

10uF 10K

AIN7R

AIN8R

Figure 35 ADC input multiplexor confiuration

w

PP Rev 2.0 December 2001

41

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