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
Copyright 2008, Texas Instruments Incorporated
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