PCM3168APAPR datasheet(51/66 Pages) TI

51 / 66 page

PCM3168A

PCM3168A-Q1

www.ti.com ......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008

DEC

HEX

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MUTAD6

MUTAD5

MUTAD4

MUTAD3

MUTAD2

MUTAD1

MUTAD[6:1] ADC Soft Mute control

These bits are used to enable or disable the Soft Mute function for the corresponding ADC

outputs, DOUT. The Soft Mute function is incorporated into the digital attenuators.

When Mute is disabled (MUTAD[6:1] = 0), the attenuator and ADC operate normally. When Mute

is enabled by setting MUTAD[6:1] = 1, the digital attenuator for the corresponding output

decreases from the current setting to infinite attenuation with an s-curve responses and time set

by ATSPAD.

By setting MUTAD[6:1] = 0, the attenuator increases to the last attenuation level with the s-curve

response in same manner as for decreasing levels. This provides pop and zipper noise-free

muting for the ADC input.

The Soft Mute control uses the same digital attenuation level resource setting as the ADC. Mute

control has priority over the digital attenuation level setting.

Default value: 00 0000.

MUTAD

ADC Soft Mute control

xx xxx0

ADC1 Mute disabled

xx xxx1

ADC1 Mute enabled

xx xx0x

ADC2 Mute disabled

xx xx1x

ADC2 Mute enabled

xx x0xx

ADC3 Mute disabled

xx x1xx

ADC3 Mute enabled

xx 0xxx

ADC4 Mute disabled

xx 1xxx

ADC4 Mute enabled

x0 xxxx

ADC5 Mute disabled

x1 xxxx

ADC5 Mute enabled

0x xxxx

ADC6 Mute disabled

1x xxxx

ADC6 Mute enabled

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