TAS5708 datasheet(26/56 Pages) TI

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Dynamic Range Control (DRC)

Input Level (dB)

M0091-02

1:1 TransferFunction

Implemented TransferFunction

–1

AlphaFilterStructure

B0265-03

Energy

Filter

a w

T,K,O

DRC

0x3A

0x40,0x41,0x42

0x3B/0x3C

Compression

Control

Attack

and

Decay

Filters

AudioInput

DRCCoefficient

NOTE:

=1 –

TAS5708

SLOS570 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com

The DRC scheme has a single threshold, offset, and slope (all programmable). There is one ganged DRC for the

left/right channels.

The DRC input/output diagram is shown in Figure 32.

Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.

• One DRC for left/right

• The DRC has adjustable threshold, offset, and compression levels

• Programmable energy, attack, and decay time constants

• Transparent compression: compressors can attack fast enough to avoid apparent clipping before engaging,

and decay times can be set slow enough to avoid pumping.

Figure 32. Dynamic Range Control

Figure 33. DRC Structure

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