Datasheet

PCM1690
SBAS448A – OCTOBER 2008 – REVISED JANUARY 2009 .............................................................................................................................................. www.ti.com
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
68 44 MUTDA8 MUTDA7 MUTDA6 MUTDA5 MUTDA4 MUTDA3 MUTDA2 MUTDA1
MUTDA[8:1] Soft Mute control
These bits are used to enable or disable the Soft Mute function for the corresponding DAC
outputs, VOUT. The Soft Mute function is incorporated into the digital attenuators. When mute is
disabled (MUTDA[8:1] = 0), the attenuator and DAC operate normally. When mute is enabled by
setting MUTDA[8:1] = 1, the digital attenuator for the corresponding output is decreased from the
current setting to infinite attenuation. By setting MUTDA[8:1] = 0, the attenuator is increased to
the last attenuation level in the same manner as it is for decreasing levels. This configuration
reduces pop and zipper noise during muting of the DAC output. This Soft Mute control uses the
same resource of digital attenuation level setting. Mute control has priority over the digital
attenuation level setting.
Default value: 0000 0000.
MUTDA Soft Mute control
xxxx xxx0 DAC1 Mute disabled
xxxx xxx1 DAC1 Mute enabled
xxxx xx0x DAC2 Mute disabled
xxxx xx1x DAC2 Mute enabled
xxxx x0xx DAC3 Mute disabled
xxxx x1xx DAC3 Mute enabled
xxxx 0xxx DAC4 Mute disabled
xxxx 1xxx DAC4 Mute enabled
xxx0 xxxx DAC5 Mute disabled
xxx1 xxxx DAC5 Mute enabled
xx0x xxxx DAC6 Mute disabled
xx1x xxxx DAC6 Mute enabled
x0xx xxxx DAC7 Mute disabled
x1xx xxxx DAC7 Mute enabled
0xxx xxxx DAC8 Mute disabled
1xxx xxxx DAC8 Mute enabled
32 Submit Documentation Feedback Copyright © 2008 – 2009, Texas Instruments Incorporated
Product Folder Link(s): PCM1690