Datasheet

DynamicRangeControl(DRC)
DRC-Compensated Output
DRC Input Level
T
k
M0091-01
1:1 TransferFunction
Implemented TransferFunction
S
Z
–1
AlphaFilterStructure
w
a
B0265-01
Energy
Filter
a w,
T,K,O a w
a
,
a d d
/ ,a w
DRC1
DRC2
0x3A 0x40,0x41,0x42 0x3B/0x3C
0x3E/0x3F
0x43,0x44,0x45
0x3D
Compression
Control
Attack
and
Decay
Filters
AudioInput
DRCCoefficient
NOTE:
=a
=1 – a
a
w
TAS5706A
TAS5706B
www.ti.com .............................................................................................................................................SLOS606D–MARCH2009–REVISEDSEPTEMBER2009
TheDRCschemehasasinglethreshold,offset,andslope(allprogrammable).ThereisonegangedDRCforthe
left/rightchannelsandoneDRCforthesubwooferchannel.
TheDRCinput/outputdiagramisshowninFigure44.
Professional-qualitydynamicrangecompressionautomaticallyadjustsvolumetoflattenvolumelevel.
•OneDRCforleft/rightandoneDRCforsubwoofer
•EachDRChasadjustablethreshold,offset,andcompressionlevels
•Programmableenergy,attack,anddecaytimeconstants
•Transparentcompression:compressorscanattackfastenoughtoavoidapparentclippingbeforeengaging,
anddecaytimescanbesetslowenoughtoavoidpumping.
Figure44.DynamicRangeControl
Figure45.DRCStructure
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TAS5706A is Not Recommended for New Designs