TDA9880 datasheet(21/40 Pages) PHILIPS

21 / 40 page

1999 Jul 21

Philips Semiconductors

Product speciﬁcation

Alignment-free multistandard vision and

FM sound IF-PLL demodulator

TDA9880

Fig.4 Typical VIF and tuner AGC characteristic.

(1) VIF AGC voltage.

(2) Ituner; RTOP =22kΩ.

(3) Ituner; RTOP =12kΩ.

(4) Ituner; RTOP =0 Ω.

handbook, halfpage

110

300

600

200

500

100

400

MHB158

Vi(VIF) (dB/µV)

V20

(V)

I14

(

µA)

(2)

(3)

(4)

(1)

Fig.5

Typical tuner takeover point as a function of

RTOP.

handbook, halfpage

024

120

100

MHB159

820

416

Vi(VIF)

(dB/

µV)

RTOP (kΩ)

Fig.6

Typical signal-to-noise ratio as a function of

VIF input voltage.

handbook, halfpage

110

MHB160

Vi(VIF) (dB/µV)

S/N

(dB)

Fig.7 Input signal conditions.

SC = sound carrier, with respect to sync level.

CC = chrominance carrier, with respect to sync level.

PC = picture carrier, with respect to sync level.

The sound carrier levels are taking into account a sound shelf

attenuation of 20 dB (SAW filter M1963M).

handbook, halfpage

SC CC

BLUE

YELLOW

21 dB

13.2 dB

3.2 dB

21 dB

13.2 dB

10 dB

MHA739

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