WM8352 datasheet(83/336 Pages) WOLFSON

부품명	WM8352

상세설명	Wolfson AudioPlus™ Stereo CODEC with Power Management

PDF	336 Pages

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제조업체	WOLFSON [Wolfson Microelectronics plc]

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Production Data

WM8352

PD, February 2011, Rev 4.4

13.9 ANALOGUE OUTPUTS

13.9.1

OUT1L AND OUT1R

The headphone outputs, OUT1L and OUT1R can drive a 16

Ω 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.

From right

output mixer

-1

OUT1R_VOL

R105 [7:2]

From left

output mixer

OUT1L_VOL

R104 [7:2]

-1

OUT1L

OUT1R

Vmid

OUT1L_MUTE

R104 [14]

OUT1R_MUTE

R105 [14]

HPCOM

OUT1_FB

R76 [0]

Figure 44 Headphone Outputs OUT1L and OUT1R

WM8352 데이터시트(PDF) 83 Page - Wolfson Microelectronics plc