TAS5028 datasheet(26/84 Pages) TI

26 / 84 page

Introduction

SLES112 — June 2004

TAS5028

Similarly, the TAS5028 carries additional precision in the form of overflow bits to permit the value of

intermediate calculations to exceed the input precision without clipping. The TAS5028 advanced digital audio

processor achieves both of these important performance capabilities by using a high performance digital audio

processing architecture with a 48-bit data path, 28-bit filter coefficients, and a 76-bit accumulator.

1.6

Input Crossbar Mixer

The TAS5028 has a full 8x8 input crossbar mixer. This mixer permits each signal processing channel input

to be any ratio of any of the eight input channels. The control parameters for the input crossbar mixer are

programmable via the I2C interface. See the Input Mixer Register (0x41 - 0x48, channels 1 - 8) section.

SUM

Gain Coefficient

Input 1

Gain Coefficient

Input 2

Gain Coefficient

Input 8

Figure 1 - 14. Input Crossbar Mixer

1.7

Bass and Treble Controls

From 32-kHz to 96-kHz data, the TAS5028 has four Bass and Treble tone controls. Each control has a

±18-dB

control range with selectable corner frequencies and 2nd order slopes. These controls operate four channel

groups:

•

L, R & C (Channels 1, 2, and 7)

•

LS, RS (Channels 3 and 4)

•

LBS, RBS (or alternately called L and R Lineout.) (Channels 5 and 6)

•

Sub (Channel 8)

For 176.4 kHz and 192 kHz data, the TAS5028 has two Bass and Treble tone controls. Each control has a

±18-dB I2C control range with selectable corner frequencies and 2nd order slopes. These controls operate

two channel groups:

•

L & R

•

Sub

The bass and treble filters utilize a soft update rate that does not produce artifacts during adjustment.

TAS5028 Datasheet(PDF) 26 Page - Texas Instruments

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