wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 84
wm8351
Manufacturer Part Number
wm8351
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8351.pdf
(328 pages)
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13.9.2
OUT2L and OUT2R are designed as a stereo pair and can drive a headphone, a line load or a
loudspeaker amplifier. Each output has an analogue volume control PGA with a gain range of -57dB
to +6dB as shown in Figure 45.
Common mode noise rejection is also possible on the OUT2L and OUT2R outputs, using HPCOM as
the return path. The HPCOM feature must be enabled via the OUT2_FB register field and the
HPCOM connection must be AC coupled to the headphone output. A 4.7uF coupling capacitor is
required between the noisy ground connection the HPCOM pin.
The control register fields for the OUT2L and OUT2R outputs are described in Table 41. The
available output configurations are shown in Section 13.9.3.
Figure 45 Headphone Outputs OUT2L and OUT2R
output mixer
output mixer
OUT2L AND OUT2R
From right
From left
OUT2R_VOL
OUT2L_VOL
R107 [7:2]
R106 [7:2]
Vmid
OUT2R_MUTE
OUT2L_MUTE
R107 [14]
R106 [14]
OUT2_FB
R76 [2]
-1
-1
PD, June 2009, Rev 4.1
HPCOM
OUT2R
OUT2L
Production Data
84
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