WM8352 datasheet(69/336 Pages) WOLFSON

69 / 336 page

Production Data

WM8352

PD, February 2011, Rev 4.4

13.4.7

INPUT MIXERS

The WM8352 has mixers in the input signal paths. This allows each ADC to record either a single

input signal or a mix of several signals, as desired. The gain for the different input signals can also

be adjusted. Each input mixer has four inputs:

•

the output of the respective (left/right) microphone pre-amplifier

•

the IN2L and IN2R pins (used as a line input, bypassing the microphone pre-amplifiers)

•

the output of the respective (left/right) auxiliary input buffer (ie. inputs IN3L or IN3R)

•

the output of the OUT4 amplifier (only one input mixer at a time can take this signal)

Left ADC input

Output from

IN3L amplifier

Output from

left microphone

pre-amplifier

IN2L

IN3L_MIXINL_VOL, R98[11:9]

IN2L_MIXINL_VOL, R98[3:1]

INL_MIXINL_VOL, R98[0]

-12dB to + 6dB,

and mute

-12dB to + 6dB

and mute

0dB or +20dB

Output from

OUT4 mixer

OUT4_MIXIN_VOL, R100[3:1]

-12dB to + 6dB

and mute

Output from

right microphone

pre-amplifier

INR2

INR2_MIXINR_VOL, R99[7:5]

INR_MIXINR_VOL, R99[0]

0dB or +20dB

-12dB to + 6dB

and mute

Output from

IN3R amplifier

IN3R_MIXINR_VOL, R99[15:13]

-12dB to + 6dB,

and mute

OUT4_MIXIN_DST,

R100[15]

-1

OUT3 mixer

Right ADC input

OUT4 mixer

Figure 39 Input Mixers

WM8352 Datasheet(PDF) 69 Page - Wolfson Microelectronics plc

WM8352 Datasheet(HTML) 69 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL