TAS5508 datasheet(21/105 Pages) TI

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2.3

TAS5508 DAP Architecture

2.3.1

TAS5508 DAP Architecture Diagrams

TAS5508

8-Channel Digital Audio PWM Processor

www.ti.com

SLES091D – FEBRUARY 2004 – REVISED JULY 2009

Table 2-2. TAS5508 Audio Processing Feature Sets

32 kHz–96 kHz

176.4- and 192-kHz

FEATURE

8-CHANNEL FEATURE SET

6 + 2 LINEOUT FEATURE SET

FEATURE SET

Signal-processing channels

6 + 2

Pass-through channels

N/A

Master volume

1 for 8 channels

1 for 6 channels

1 for 3 channels

Individual channel volume

controls

Four bass and treble tone controls

Two bass and treble tone

with

＝18-dB range, programmable

with

＝18-dB range, programmable

controls with

＝18-dB range,

corner frequencies, and second-

programmable corner

Bass and treble tone

order slopes

frequencies, and second-order

controls

L, R, and C (Ch1, 2, and 7)

slopes

LS, RS (Ch3 and 4)

L and R (Ch1 and 2)

LBS, RBS (Ch5 and 6)

Sub (Ch8)

Line L and R (Ch5 and 6)

Biquads

Dynamic range

DRC1 for seven satellites and

DRC1 for five satellites and DRC2

DRC1 for two satellites and

compressors

DRC2 for sub

for sub (Ch5 and 6 uncompressed)

DRC2 for sub

Each of the three signal-

processing channels or the five

pass-though channel inputs can

Each of the eight signal-processing channel inputs can be any ratio of the

be any ratio of the eight input

Input/output mapping/

eight input channels.

channels.

mixing

Each of the eight outputs can be any ratio of any two processed channels.

Each of the eight outputs can be

any ratio of any of the three

processed channels or five

bypass channels.

DC-blocking filters

(implemented in PWM

Eight channels

section)

Digital de-emphasis

Eight channels for 32 kHz,

Six channels for 32 kHz, 44.1 kHz,

(implemented in PWM

N/A

44.1 kHz, and 48 kHz

and 48 kHz

section)

Loudness

Eight channels

Six channels

Three channels

Number of coefficient sets

Three additional coefficient sets can be stored in memory.

stored

Figure 2-1 shows the TAS5508 DAP architecture for Fs = 96 kHz. Note the TAS5508 bass management

architecture shown in channels 1, 2, 7, and 8. Note that the I2C registers are shown to help the designer

configure the TAS5508.

Figure 2-2 shows the TAS5508 architecture for Fs = 176.4 kHz or Fs = 192 kHz. Note that only channels

1, 2, and 8 contain all the features. Channels 3–7 are pass-through except for master volume control.

Figure 2-3 shows TAS5508 detailed channel processing. The output mixer is 8

＝2 for channels 1–6 and

＝3 for channels 7 and 8.

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