TAS5715 datasheet(35/74 Pages) TI

35 / 74 page

Input Level (dB)

M0176-01

1:1 Transfer Function

Implemented Transfer Function

–1

AlphaFilterStructure

B0265-05

Attack/Release

SofteningFilter

Threshold

DRC1

DRC2

0x3C

0x3B

0x40

0x43

0x3E

0x3F

TAS5715

www.ti.com

SLOS645 – AUGUST 2010

Automatic Gain Limit (DRC)

The DRC scheme has a single programmable threshold. 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 48.

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

• Each DRC has adjustable threshold levels.

• Programmable attack, release, and softening-filter 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 48. Automatic Gain Limit

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

Figure 49. DRC Filter Structure

DRC acts more like a gain limiter (automatic gain limiter, AGL). The block works to reduce the peak of energy if it

goes beyond the programmable threshold level. DRC starts an attack event (reduces gain) if energy goes above

the threshold. Similarly, it starts a release event if the level goes below the threshold (increases gain back to the

original value).

Submit Documentation Feedback

Product Folder Link(s): TAS5715

TAS5715 Datasheet(PDF) 35 Page - Texas Instruments