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TDA9881 Datasheet

Alignment-free vision and FM sound IF PLL demodulator

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TDA9881
www.DataSheet4U.com
Alignment-free vision and FM sound IF PLL demodulator for
negative modulated TV standards
Rev. 01 — 16 November 2004
Product data sheet
1. General description
The TDA9881 is an alignment-free multistandard (PAL and NTSC) vision and sound
IF signal PLL demodulator for negative modulation, including Quasi Split Sound (QSS) or
intercarrier FM processing.
2. Features
s 5 V supply voltage
s Gain controlled wideband Vision Intermediate Frequency (VIF) amplifier; AC-coupled
s Multistandard true synchronous demodulation for negative modulated standards with
active carrier regeneration: very linear demodulation, good intermodulation figures,
reduced harmonics and excellent pulse response
s Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free, frequencies
switchable via logic pin VIF0 and pin QSSO with resistor
s Digital acquisition help circuit, VIF frequencies of 38.0 MHz, 38.9 MHz, 45.75 MHz and
58.75 MHz
s 4 MHz reference frequency input signal from Phase-Locked Loop (PLL) tuning system
or operating as crystal oscillator
s VIF Automatic Gain Control (AGC) detector for gain control; operating as peak sync
detector
s VIF AGC monitor output at pin VAGC
s Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit
digital-to-analog converter
s TakeOver Point (TOP) adjustable with potentiometer
s Fully integrated sound carrier trap for 4.5 MHz, 5.5 MHz, 6.0 MHz and 6.5 MHz;
controlled by FM PLL oscillator
s Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode; PLL
controlled
s SIF AGC for gain controlled SIF amplifier; single reference QSS mixer able to operate
in high performance single reference QSS mode or in intercarrier mode; switchable via
SIF input pins
s Alignment-free selective FM PLL demodulator with high linearity and low noise.
3. Applications
s TV, VTR, PC and Set-Top Box (STB) applications.


NXP Semiconductors Electronic Components Datasheet

TDA9881 Datasheet

Alignment-free vision and FM sound IF PLL demodulator

No Preview Available !

Philips Semiconductors
TDA9881
www.DataSheet4U.com
Alignment-free vision and FM sound IF PLL demodulator
4. Quick reference data
Table 1: Quick reference data
Symbol
Parameter
Conditions
Min
VP
IP
Video part
supply voltage
supply current
[1] [2] 4.5
52
Vi(VIF)(rms)
VIF input voltage sensitivity
(RMS value)
1 dB video at output
-
GVIF(cr)
fVIF
VIF gain control range
vision carrier operating
frequencies
see Figure 6
see Table 4
60
-
-
-
-
fVIF
VIF frequency window of digital related to fVIF;
acquisition help
see Figure 9
-
Vo(video)(p-p)
video signal output voltage
(peak-to-peak value)
see Figure 4
1.7
Gdif differential gain
ϕdif differential phase
Bvideo(3dB)(trap) 3 dB video bandwidth
including sound carrier trap
αSC1
trap attenuation at first sound
carrier
“CCIR 330”; B/G standard
“CCIR 330”
ftrap = 4.5 MHz
ftrap = 5.5 MHz
ftrap = 6.0 MHz
ftrap = 6.5 MHz
M/N standard
B/G standard
[3] -
-
[4] 3.95
[4] 4.90
[4] 5.40
[4] 5.50
26
26
S/NW(video)
weighted signal-to-noise ratio
of video signal
weighted in accordance
with “CCIR 567”;
see Figure 10
[5] 55
PSRRCVBS
power supply ripple rejection at fripple = 70 Hz;
pin CVBS
see Figure 5
[6] 20
AFCstps
Audio part
AFC control steepness
definition: IAFC/fVIF
0.85
Vo(AF)(rms)
AF output voltage (RMS value) 27 kHz FM deviation;
50 µs de-emphasis
430
THD
total harmonic distortion of
audio signal
FM: 27 kHz FM deviation;
50 µs de-emphasis
-
BAF(3dB)
3 dB AF bandwidth
without de-emphasis;
dependent on FM PLL
filter
80
S/NW(AF)
weighted signal-to-noise ratio
of audio signal
FM: 27 kHz FM deviation;
50 µs de-emphasis; vision
carrier unmodulated
52
αAM(sup)
AM suppression of
FM demodulator
50 µs de-emphasis;
AM: f = 1 kHz and
m = 54 %; referenced to
27 kHz FM deviation
40
Typ Max
5.0 5.5
63 70
60 100
66
38.0
38.9
45.75
58.75
±2.3
-
-
-
-
-
-
2.0 2.3
-5
24
4.05 -
5.00 -
5.50 -
5.95 -
36 -
36 -
--
25 -
1.05 1.25
540 650
0.15 0.50
100 -
56 -
46 -
Unit
V
mA
µV
dB
MHz
MHz
MHz
MHz
MHz
V
%
deg
MHz
MHz
MHz
MHz
dB
dB
dB
dB
µA/kHz
mV
%
kHz
dB
dB
9397 750 13417
Product data sheet
Rev. 01 — 16 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 42


Part Number TDA9881
Description Alignment-free vision and FM sound IF PLL demodulator
Maker NXP
Total Page 30 Pages
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