TDA9875A.PDF

INTEGRATED CIRCUITS

DATA SHEET

TDA9875

Digital TV Sound Processor

(DTVSP)

Preliminary speciﬁcation

Supersedes data of 1997 Mar 20

File under Integrated Circuits, IC02

1998 Feb 13

Philips Semiconductors

Preliminary speciﬁcation

Digital TV Sound Processor (DTVSP)

TDA9875

CONTENTS

FEATURES

1.1

Demodulator and decoder section

1.2

DSP section

1.3

Analog audio section

GENERAL DESCRIPTION

2.1

Supported standards

ORDERING INFORMATION

BLOCK DIAGRAM

PINNING

FUNCTIONAL DESCRIPTION

6.1

Description of the demodulator and decoder

section

6.2

Description of the DSP

6.3

Description of the analog audio section

LIMITING VALUES

THERMAL CHARACTERISTICS

CHARACTERISTICS

I 2 C-BUS CONTROL

10.1

Introduction

10.2

Power-up state

10.3

Slave receiver mode

10.4

Slave transmitter mode

10.5

Expert mode

I 2 S-BUS DESCRIPTION

EXTERNAL COMPONENTS

PACKAGE OUTLINE

SOLDERING

14.1

Introduction

14.2

Soldering by dipping or by wave

14.3

Repairing soldered joints

DEFINITIONS

LIFE SUPPORT APPLICATIONS

PURCHASE OF PHILIPS I 2 C COMPONENTS

1998 Feb 13

Philips Semiconductors

Preliminary speciﬁcation

Digital TV Sound Processor (DTVSP)

TDA9875

1 FEATURES

1.1

Demodulator and decoder section

Sound IF (SIF) input switch e.g. to select between

terrestrial TV SIF and SAT SIF sources

SIF AGC with 21 dB control range

SIF 8-bit Analog-to-Digital Converter (ADC)

Standby mode with functionality for SCART copies

DQPSK demodulation for different standards,

simultaneously with 1-channel FM demodulation

Dual audio digital-to-analog converter from

DSP to analog crossbar switch, bandwidth 15 kHz

NICAM decoding (B/G, I and L standard)

Dual audio ADC from analog inputs to DSP

Two-carrier multistandard FM demodulation (B/G, D/K

and M standard)

Two dual audio Digital-to-Analog Converters (DACs) for

loudspeaker (Main) and headphone (Auxiliary) outputs;

also applicable for L, R, C and S in the Dolby Pro Logic

mode with feature extension.

Decoding for three analog multi-channel systems (A2,

A2+ and A2*) and satellite sound

Optional AM demodulation for system L, simultaneously

with NICAM

2 GENERAL DESCRIPTION

The TDA9875 is a single-chip Digital TV Sound Processor

(DTVSP) for analog and digital multi-channel sound

systems in TV sets and satellite receivers.

Programmable identification (B/G, D/K and M standard)

and different identification times.

1.2

DSP section

Digital crossbar switch for all digital signal sources and

destinations

2.1

Supported standards

The multistandard/multi-stereo capability of the TDA9875

is mainly of interest in Europe, but also in Hong

Kong/Peoples Republic of China and South East Asia.

This includes B/G, D/K, I, M and L standard. In other

application areas there exists only subsets of those

standard combinations otherwise only single standards

are transmitted.

M standard is transmitted in Europe by the American

Forces Network (AFN) with European channel spacing

(7 MHz VHF, 8 MHz UHF) and monaural sound.

Control of volume, balance, contour, bass, treble,

pseudo stereo, spatial, bass boost and soft-mute

Plop-free volume control

Automatic Volume Level (AVL) control

Adaptive de-emphasis for satellite

Programmable beeper

Monitor selection for FM/AM DC values and signals,

with peak detection option

I 2 S-bus interface for a feature extension (e.g. Dolby

surround) with matrix, level adjust and mute.

The AM sound of L/L’ standard is normally demodulated in

the 1st sound IF. The resulting AF signal has to be entered

into the mono audio input of the TDA9875. A second

possibility is to use the internal AM demodulator stage,

however this gives limited performance.

1.3

Analog audio section

Analog crossbar switch with inputs for mono and stereo

(also applicable as SCART 3 input), SCART 1

input/output, SCART 2 input/output and line output

Korea has a stereo sound system similar to Europe and is

supported by the TDA9875. Differences include deviation,

modulation contents and identification. It is based on

M standard.

User defined full-level/

3 dB scaling for SCART outputs

Output selection of mono, stereo, dual A/B, dual A or

dual B

An overview of the supported standards and sound

systems and their key parameters is given in Table 1.

20 kHz bandwidth for SCART-to-SCART copies

1998 Feb 13

Philips Semiconductors

Preliminary speciﬁcation

Digital TV Sound Processor (DTVSP)

TDA9875

2.1.1

A NALOG 2- CARRIER SYSTEMS

Table 1 Frequency modulation

SOUND

SYSTEM

CARRIER

FREQUENCY

(MHz)

FM DEVIATION

(kHz)

NOM./MAX./OVER

MODULATION

BANDWIDTH/

DE-EMPHASIS

(kHz/ m s)

STANDARD

SC1

SC2

mono

4.5

15/25/50

mono

15/75

A2+

4.5/4.724

15/25/50

¤ 2 (L + R)

¤ 2 (L - R)

15/75 (Korea)

B/G

5.5/5.742

27/50/80

¤ 2 (L + R)

15/50

mono

6.0

27/50/80

mono

15/50

D/K

6.5/6.742

27/50/80

¤ 2 (L + R)

15/50

D/K

A2*

6.5/6.26

27/50/80

¤ 2 (L + R)

15/50

Table 2 Identiﬁcation for A2 systems

PARAMETER

A2/A2*

A2+ (KOREA)

Pilot frequency

54.6875 kHz = 3.5

line frequency

55.0699 kHz = 3.5

line frequency

Stereo identiﬁcation

frequency

117.5 Hz

pilot frequency

133

149.9 Hz

pilot frequency

105

Dual identiﬁcation frequency

274.1 Hz

pilot frequency

276.0 Hz

pilot frequency

AM modulation depth

50%

2.1.2

2- CARRIER SYSTEMS WITH NICAM

Table 3 NICAM

SC1

MODULATION

SC2

(MHz)

NICAM

ROLL-OFF

(%)

NICAM

CODING

STANDARD

FREQUENCY

(MHz)

DEVIATION

(kHz)

NOM./MAX.

DE-EMPHASIS

TYPE

INDEX (%)

NOM/MAX.

B/G

5.5

27/50

5.85

J17

note 1

6.0

27/50

6.552

J17

100

note 1

D/K

6.5

27/50

5.85

J17

not yet

deﬁned

6.5

54/100

5.85

J17

note 1

Note

1. See “EBU specification” or equivalent specification.

1998 Feb 13

---------------------------------------

Philips Semiconductors

Preliminary speciﬁcation

Digital TV Sound Processor (DTVSP)

TDA9875

2.1.3

S ATELLITE SYSTEMS

An important specification for satellite TV reception is the “Astra specification”. The TDA9875 is suited for the reception

of Astra and other satellite signals.

Table 4 FM satellite sound

CARRIER TYPE

CARRIER

FREQUENCY

(MHz)

MODULATION

INDEX

MAXIMUM

FM DEVIATION

(kHz)

MODULATION

BANDWIDTH/

DE-EMPHASIS

(kHz/

Main

6.50 (1)

0.26

mono

15/50 (1)

Sub

7.02/7.20

0.15

m/st/d (2)

15/adaptive (3)

Sub

7.38/7.56

0.15

m/st/d (2)

15/adaptive (3)

Sub

7.74/7.92

0.15

m/st/d (2)

15/adaptive (3)

Sub

8.10/8.28

0.15

m/st/d (2)

15/adaptive (3)

Notes

1. For other satellite systems, frequencies of, for example, 5.80, 6.60 or 6.65 MHz can also be received. A de-emphasis

of 60 m s, or in accordance with J17, is available.

2. m/st/d = mono or stereo or dual language sound.

3. Adaptive de-emphasis = compatible to transmitter specification.

3 ORDERING INFORMATION

PACKAGE

TYPE NUMBER

NAME

DESCRIPTION

VERSION

TDA9875

SDIP64

plastic shrink dual in-line package; 64 leads (750 mil)

SOT274-1

1998 Feb 13

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