TDA9847 datasheet(2/28 Pages) PHILIPS

2 / 28 page

1995 May 23

Philips Semiconductors

Preliminary speciﬁcation

TV and VTR stereo/dual sound processor

with digital identiﬁcation

TDA9847

FEATURES

• Supply voltage 5 to 8 V

• Source selector

• Stereo matrix

• AF inputs for external stereo AF signals

(SCART or NICAM)

• AF outputs for main and SCART

• LED operation mode indication (stereo and dual)

• High identification reliability.

GENERAL DESCRIPTION

The TDA9847 is a stereo/dual sound processor for TV and

VTR sets. Its identification ensures safe operation by using

internal digital PLL technique with extremely small

bandwidth, synchronous detection and digital integration

(switching time maximum 2.0 s; identification concerning

the main functions).

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 22)

4.5

8.8

supply current (pin 22)

without LED current

Vi(rms)

nominal input signal voltage

Vi1 to Vi4 (RMS value)

54% modulation

B/G

−

250

−

500

−

Vo(rms)

nominal output signal voltage

(RMS value)

54% modulation

−

500

−

Vo(rms)

clipping level of the output signal

voltages (RMS value)

THD

≤ 1.5%; B/G or L

VP = 5 V

1.4

1.60

−

VP = 8 V

2.4

2.65

−

ILon

input current

LED on

−−

Vi pil

input voltage sensitivity of pilot

frequency

unmodulated

−

100

S/N(W)

weighted signal-to-noise ratio

“CCIR468-3”

−

THD

total harmonic distortion

−

0.2

0.3

Tamb

operating ambient temperature

−

+70

°C

fident

identiﬁcation window width

stereo

2.2

−

2.2

dual

2.3

−

2.3

tident on

total identiﬁcation time on

0.35

−

2.0

Vi tuner

identiﬁcation voltage sensitivity

−

µV

∆f

pil

pull-in frequency range of pilot PLL

fosc = 10.008 MHz

lower side

−296

−−296

upper side

302

−

302

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA9847

SDIP24

plastic shrink dual in-line package; 24 leads (400 mil)

SOT234-1

TDA9847T

SO24

plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

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