TAS5717 datasheet(30/67 Pages) TI

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Input Level (dB)

M0091-03

1:1 Transfer Function

Implemented Transfer Function

–1

Alpha Filter Structure

B0265-04

Energy

Filter

a w

DRC1

DRC2

0x3B

0x40

0x3C

0x3F

0x43

0x3E

Threshold

Detect

Attack

and

Decay

Filters

Audio Input

DRC Coefficient

TAS5717

TAS5719

SLOS655A

– NOVEMBER 2010 – REVISED FEBRUARY 2011

www.ti.com

Dynamic Range Control (DRC)

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

high-band left/right channels and one DRC for the low-band left/right channels.

The DRC input/output diagram is shown in Figure 40.

See the GDE software tool for more description on the T, K, and O parameters.

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

• Each DRC has adjustable threshold 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 40. Dynamic Range Control

T = 9.23 format, all other DRC coefficients are 3.23 format

Figure 41. DRC Structure

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TAS5717 Datasheet(PDF) 30 Page - Texas Instruments

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