TDA9874H datasheet(47/56 Pages) PHILIPS

47 / 56 page

1998 Apr 27

Philips Semiconductors

Preliminary speciﬁcation

Digital TV sound demodulator/decoder

TDA9874H

B(−3dB)

−3 dB bandwidth

from FM source to any output

14.5

−

kHz

from NICAM source to any

output

14.5

−

kHz

fresp

frequency response

20 Hz to 14 kHz

from FM/NICAM to any output;

reference 1 kHz

−2

−

cd(dual)

dual signal channel separation

note 6

−

cs(stereo)

stereo channel separation

note 7

−

αAM

AM suppression for FM

AM: 1 kHz, 30% modulation;

reference: 1 kHz, 50 kHz

deviation

−−

dmAM

AM demodulation

SIF level 100 mV (RMS); 54%

AM; 1 kHz AF;

“CCIR468”;

quasi peak

−

IDENTIFICATION FOR FM SYSTEMS

mpilot(ident)

pilot modulation for identiﬁcation

C/Npilot(ident)

pilot sideband C/N for

identiﬁcation start

−

hys(tun)

hysteresis

−−

2dB

fident

identiﬁcation window

B/G stereo

slow mode

116.85

−

118.12 Hz

medium mode

116.11

−

118.89 Hz

fast mode

114.65

−

120.46 Hz

B/G dual

slow mode

273.44

−

274.81 Hz

medium mode

272.07

−

276.20 Hz

fast mode

270.73

−

277.60 Hz

ton(ident)

total identiﬁcation time on

slow mode

−−

medium mode

−−

fast mode

−−

0.5

toff(ident)

total identiﬁcation time off

slow mode

−−

medium mode

−−

fast mode

−−

0.5

Mono and external inputs

Vi(nom)(rms)

nominal level input voltage

(RMS value)

note 2

−

500

−

Vi(cl)(rms)

clipping level input voltage

(RMS value)

THD < 3%; note 3

1250

1400

−

input resistance

note 3

Ω

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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