TDA9845 datasheet(2/20 Pages) PHILIPS

2 / 20 page

1995 Mar 20

Philips Semiconductors

Preliminary speciﬁcation

TV and VTR stereo/dual sound processor

with digital identiﬁcation

TDA9845

FEATURES

• Supply voltage 5 to 8 V

• Source selector

• Stereo matrix

• AF input for mono source

• AF outputs for Main

• LED operation mode indication (stereo and dual)

• High identification reliability.

GENERAL DESCRIPTION

The TDA9845 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 2.1 s; identification concerning

the main functions).

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

supply voltage (pin 18)

4.5

8.8

supply current (pin 18)

without LED current

16.5

Vi(rms)

nominal input signal voltage

(Vi1, Vi2, Vi3) (RMS value)

54% modulation

B/G

−

250

−

L (only for Vi1)

−

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%

VP = 5 V

1.4

1.6

−

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”66

−

THD

total harmonic distortion

−

0.2

0.3

Tamb

operating ambient temperature range

−

+70

°C

fident

identiﬁcation window width

STEREO

2.2

−

2.2

DUAL

2.3

−

2.3

tident ON

total identiﬁcation time ON

0.35

−

2.1

Vi tuner

identiﬁcation voltage sensitivity

−

µV

∆fpil

pull-in frequency range of pilot PLL

fω = 10.008 MHz

lower side

−296 −−296 Hz

upper side

302

−

302

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

TDA9845

DIP20

plastic dual in-line package; 20 leads (300 mil)

SOT146-1

TDA9845T

SO20

plastic small outline package; 20 leads; body width 7.5 mm

SOT163-1

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