TDA9874APS datasheet(19/68 Pages) PHILIPS

19 / 68 page

1999 Dec 03

Philips Semiconductors

Preliminary speciﬁcation

Digital TV sound demodulator/decoder

TDA9874A

SIF1 and SIF2 analog inputs

VSIF(max)(p-p)

maximum composite SIF input

voltage before clipping

(peak-to-peak value)

SIF input level adjustment

0dB

−

941

−

SIF input level adjustment

−10 dB

−

2976

−

VSIF(min)(p-p)

minimum composite SIF input

voltage for lower limit of AGC

(peak-to-peak value)

SIF input level adjustment

0dB

−

SIF input level adjustment

−10 dB

−

188

−

AGC

AGC range

−

input frequency

−

9.2

MHz

input resistance

AGCLEV = 0

−−

Ω

input capacitance

−

7.5

∆fFM

FM deviation

B/G standard; THD < 1%

±100

−−

kHz

∆f

FM(FS)

FM deviation full-scale level

terrestrial FM; level

adjustment 0 dB;

demodulator ﬁlter bandwidth

set to narrow

±150

−−

kHz

∆fFM(max)

maximum FM deviation in high

deviation mode

B/G standard; THD < 1%;

demodulator ﬁlter bandwidth

set to extra wide

±335

−−

kHz

C/NFM

FM carrier-to-noise ratio

NFM bandwidth = 6 MHz;

white noise for S/N = 40 dB;

“CCIR468-2”; quasi peak

−

C/NN

NICAM carrier-to-noise ratio

NN bandwidth = 6 MHz; bit

error rate = 10−3; white

noise

−

crosstalk attenuation

SIF1 to SIF2

fi = 4 to 9.2 MHz

−−

Demodulator performance

Vo(nom)(rms)

nominal level output voltage

(RMS value)

note 1

400

500

600

THD + N

total harmonic distortion plus

noise

from FM source to any

output; fi = 1 kHz; bandwidth

20 Hz to 20 kHz;

Vo = 1 V (RMS)

−

0.3

0.5

from NICAM source to any

output; fi = 1 kHz; bandwidth

20 Hz to 20 kHz;

Vo = 1 V (RMS)

−

0.1

0.3

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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