TDA9881TS datasheet(3/42 Pages) NXP

No. de pieza	TDA9881TS

Descripción Electrónicos	Alignment-free vision and FM sound IF PLL demodulator for negative modulated TV standards

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9397 750 13417

Product data sheet

Rev. 01 — 16 November 2004

3 of 42

Philips Semiconductors

TDA9881

Alignment-free vision and FM sound IF PLL demodulator

[1]

Values of video and sound parameters can be decreased at VP = 4.5 V.

[2]

The time constant (R

× C) at the supply must be > 1.2 µs (e.g. 1 Ω and 2.2 µF).

[3]

Condition: luminance range (5 steps) from 0 % to 100 %.

[4]

AC load: CL < 20 pF and RL >1kΩ. The sound carrier frequencies (depending on the TV standard) are attenuated by the integrated

sound carrier traps (see Figure 12 to Figure 17;

H(s) is the absolute value of the transfer function).

[5]

S/NW(video) is the ratio of the black-to-white amplitude to the black level noise voltage (RMS value measured on pin CVBS). B = 5 MHz

(B/G, I and D/K standard). Noise analyzer setting: 200 kHz high-pass and SC-trap switched on.

[6]

Conditions: video signal, grey level and negative modulation.

[7]

The intercarrier output signal at pin QSSO can be calculated by the following formula taking into account the internal video signal with

1.1 V (p-p) as a reference:

(RMS)

where:

is the correction term for RMS value,

is the sound-to-picture carrier ratio at pins VIF1 and VIF2 in dB, 6 dB is

the correction term of internal circuitry and

± 3 dB is the tolerance of video output and intercarrier output V

o(intc)(rms).

[8]

Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from the tuning system.

5.

Ordering information

PSRRFMSO

power supply ripple rejection

on pin FMSO

FM: fripple =70Hz;

see Figure 5

14

20

-

dB

Vo(intc)(rms)

IF intercarrier output level

(RMS value)

QSS mode; SC1;SC2 off

90

140

210

mV

intercarrier mode;

PC/SC1 = 20 dB; SC2 off

[7] -75

-

mV

Reference frequency

fref

reference signal frequency

[8] -4

-MHz

Vref(rms)

reference signal voltage

(RMS value)

operation as input

terminal

80

-

400

mV

Table 1:

Quick reference data …continued

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

V

o(intc)

1.1 V (p-p)

1

22

----------

×

10

V

iSC

()

V

iPC

()

----------------- dB

() 6 dB 3 dB

±

+

20

-----------------------------------------------------------------

×

=

1

22

----------

V

iSC

()

V

iPC

()

---------------- dB

()

Table 2:

Ordering information

Type number

Package

Name

Description

Version

TDA9881TS

SSOP24

plastic shrink small outline package; 24 leads; body width 5.3 mm

SOT340-1

TDA9881HN

HVQFN32

plastic thermal enhanced very thin quad ﬂat package; no leads;

32 terminals; body 5

× 5 × 0.85 mm

SOT617-3

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