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WM8711LGEFL Datasheet(PDF) 16 Page - Wolfson Microelectronics plc

No. de Pieza. WM8711LGEFL
Descripción  Internet Audio DAC with Integrated Headphone Amplifier
Descarga  44 Pages
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Fabricante  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
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WM8711LGEFL Datasheet(HTML) 16 Page - Wolfson Microelectronics plc

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WM8711L
Production Data
w
PD, Rev 4.5, August 2011
16
The software control for the line outputs is shown in Table 3.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000100
Analogue
Audio Path
Control
3
BYPASS
1
Bypass Switch
1 = Enable Bypass
0 = Disable Bypass
4
DACSEL
0
DAC Select
1 = Select DAC
0 = Don’t select DAC
Table 3 Output Software Control
The recommended external components are shown in Figure 9.
AGND
R1
C1
AGND
LINEOUT
R2
Figure 9 Line Outputs Application Drawing
Recommended values are C1 = 10
F, R1 = 47k, R2 = 100
C1 forms a DC blocking capacitor to the line outputs. R1 prevents the output voltage from drifting so
protecting equipment connected to the line output. R2 forms a de-coupling resistor preventing
abnormal loads from disturbing the device. Note that poor choice of dielectric material for C1 can
have dramatic effects on the measured signal distortion at the output.
HEADPHONE AMPLIFIER
The WM8711L has a stereo headphone output available on LHPOUT and RHPOUT. The output is
designed specifically for driving 16 or 32 ohm headphones with maximum efficiency and low power
consumption. The headphone output includes a high quality volume level adjustment and mute
function.


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