Datasheet

PCM3168A
PCM3168A-Q1
www.ti.com ......................................................................................................................................................................................... SBAS452 – SEPTEMBER 2008
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
85 55 — — 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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