wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 83

• Manufacturer Part Number: wm8352
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
13.9 ANALOGUE OUTPUTS
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13.9.1
The headphone outputs, OUT1L and OUT1R can drive a 16Ω or 32Ω headphone load, either through
DC blocking capacitors, or DC coupled without any capacitor. Each output has an analogue volume
control PGA with a gain range of -57dB to +6dB as shown in Figure 44.
Common mode noise rejection is also possible on the OUT1L and OUT1R outputs, using HPCOM as
the return path. The HPCOM feature must be enabled via the OUT1_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 OUT1L and OUT1R outputs are described in Table 40. The
available output configurations are shown in Section 13.9.3.
Figure 44 Headphone Outputs OUT1L and OUT1R
output mixer
output mixer
OUT1L AND OUT1R
From right
From left
OUT1R_VOL
OUT1L_VOL
R105 [7:2]
R104 [7:2]
Vmid
OUT1R_MUTE
OUT1L_MUTE
R105 [14]
R104 [14]
OUT1_FB
R76 [0]
-1
-1
PD, June 2009, Rev 4.1
HPCOM
OUT1R
OUT1L
WM8352
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