TDA9881
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.
Philips Semiconductors
TDA9881
Alignment-free vision and FM sound IF PLL demodulator
4. Quick reference data
Table 1:
Symbol
V
P
I
P
Video part
V
i(VIF)(rms)
G
VIF(cr)
f
VIF
VIF input voltage sensitivity
(RMS value)
VIF gain control range
vision carrier operating
frequencies
−1
dB video at output
see
Figure 6
see
Table 4
-
60
-
-
-
-
∆f
VIF
V
o(video)(p-p)
G
dif
ϕ
dif
VIF frequency window of digital related to f
VIF
;
acquisition help
see
Figure 9
video signal output voltage
(peak-to-peak value)
differential gain
differential phase
see
Figure 4
-
1.7
[3]
Quick reference data
Parameter
supply voltage
supply current
Conditions
[1] [2]
Min
4.5
52
Typ
5.0
63
60
66
38.0
38.9
45.75
58.75
±2.3
2.0
-
2
4.05
5.00
5.50
5.95
36
36
-
Max
5.5
70
100
-
-
-
-
-
-
2.3
5
4
-
-
-
-
-
-
-
Unit
V
mA
µV
dB
MHz
MHz
MHz
MHz
MHz
V
%
deg
MHz
MHz
MHz
MHz
dB
dB
dB
“CCIR 330”;
B/G standard
“CCIR 330”
f
trap
= 4.5 MHz
f
trap
= 5.5 MHz
f
trap
= 6.0 MHz
f
trap
= 6.5 MHz
-
-
3.95
4.90
5.40
5.50
26
26
B
video(−3dB)(trap)
−3
dB video bandwidth
including sound carrier trap
[4]
[4]
[4]
[4]
α
SC1
S/N
W(video)
trap attenuation at first sound
carrier
weighted signal-to-noise ratio
of video signal
M/N standard
B/G standard
weighted in accordance
with “CCIR
567”;
see
Figure 10
[5]
55
PSRR
CVBS
AFC
stps
Audio part
V
o(AF)(rms)
THD
B
AF(−3dB)
power supply ripple rejection at f
ripple
= 70 Hz;
pin CVBS
see
Figure 5
AFC control steepness
definition:
∆I
AFC
/∆f
VIF
[6]
20
0.85
430
-
80
25
1.05
540
0.15
100
-
1.25
650
0.50
-
dB
µA/kHz
mV
%
kHz
AF output voltage (RMS value) 27 kHz FM deviation;
50
µs
de-emphasis
total harmonic distortion of
audio signal
−3
dB AF bandwidth
FM: 27 kHz FM deviation;
50
µs
de-emphasis
without de-emphasis;
dependent on FM PLL
filter
FM: 27 kHz FM deviation;
50
µs
de-emphasis; vision
carrier unmodulated
50
µs
de-emphasis;
AM: f = 1 kHz and
m = 54 %; referenced to
27 kHz FM deviation
S/N
W(AF)
weighted signal-to-noise ratio
of audio signal
AM suppression of
FM demodulator
52
56
-
dB
α
AM(sup)
40
46
-
dB
9397 750 13417
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2004
2 of 42
Philips Semiconductors
TDA9881
Alignment-free vision and FM sound IF PLL demodulator
Table 1:
Symbol
PSRR
FMSO
V
o(intc)(rms)
Quick reference data
…continued
Parameter
power supply ripple rejection
on pin FMSO
IF intercarrier output level
(RMS value)
Conditions
FM: f
ripple
= 70 Hz;
see
Figure 5
QSS mode; SC
1
; SC
2
off
intercarrier mode;
PC/SC
1
= 20 dB; SC
2
off
[7]
Min
14
90
-
Typ
20
140
75
Max
-
210
-
Unit
dB
mV
mV
Reference frequency
f
ref
V
ref(rms)
reference signal frequency
reference signal voltage
(RMS value)
operation as input
terminal
[8]
-
80
4
-
-
400
MHz
mV
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Values of video and sound parameters can be decreased at V
P
= 4.5 V.
The time constant (R
×
C) at the supply must be > 1.2
µs
(e.g. 1
Ω
and 2.2
µF).
Condition: luminance range (5 steps) from 0 % to 100 %.
AC load: C
L
< 20 pF and R
L
> 1 kΩ. 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).
S/N
W(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.
Conditions: video signal, grey level and negative modulation.
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:
V
i
(
SC
)
----------------
(
dB
)
+ 6 dB
±
3 dB
-
V
i
(
PC
)
-----------------------------------------------------------------
20
1
V
o(intc)
=
1.1
V (p-p)
×
---------
×
10
-
2 2
1
(RMS)
where:
---------
is the correction term for RMS value,
---------------
(
dB
)
is the sound-to-picture carrier ratio at pins VIF1 and VIF2 in dB, 6 dB is
-
-
2 2
V
i
(
SC
)
V
i
(
PC
)
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
Table 2:
Ordering information
Package
Name
TDA9881TS
TDA9881HN
SSOP24
HVQFN32
Description
plastic shrink small outline package; 24 leads; body width 5.3 mm
plastic thermal enhanced very thin quad flat package; no leads;
32 terminals; body 5
×
5
×
0.85 mm
Version
SOT340-1
SOT617-3
Type number
9397 750 13417
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2004
3 of 42
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Product data sheet
Rev. 01 — 16 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9397 750 13417
6. Block diagram
Philips Semiconductors
external reference signal
or 4 MHz crystal
VIF PLL
filter
VPLL
19 (21)
TOP
9 (8)
TAGC
14 (15)
C
AGC
VAGC
22 (24)
REF
15 (16)
AFC
21 (23)
TUNER AGC
VIF AGC
RC VCO
DIGITAL VCO CONTROL
AFC DETECTOR
VIF2
VIF1
2 (31)
1 (30)
VIF PLL
SOUND TRAPS
4.5 MHz to 6.5 MHz
(18) 17
CVBS
video output: 2 V (p-p)
TDA9881
(7) 8
SIF2
SIF1
24 (27)
23 (26)
SINGLE REFERENCE QSS MIXER
INTERCARRIER MIXER
AUDIO PROCESSING
AND SWITCHES
(3) 5
FMSO
DEEM
de-emphasis
network
(4) 6
SUPPLY
SIF AGC
C
AGC
LOGIC
NARROW-BAND
FM PLL DEMODULATOR
AFD
C
AF
Alignment-free vision and FM sound IF PLL demodulator
FM sound output
20 (22)
VP
18 (20)
AGND
3 (1)
i.c.
16 (17)
13 (14) 11 (10) 10 (9) 7 (5)
FM0
FM1
DGND
12 (11)
QSSO
4 (2)
FMPLL
mhc504
AMUTE0 VIF0
single reference
QSS output
FM PLL
filter
TDA9881
Pin numbers for TDA9881HN in parenthesis.
4 of 42
Fig 1. Block diagram.
Philips Semiconductors
TDA9881
Alignment-free vision and FM sound IF PLL demodulator
7. Pinning information
7.1 Pinning
31 VIF2
30 VIF1
27 SIF2
26 SIF1
32 n.c.
29 n.c.
28 n.c.
terminal 1
index area
i.c.
FMPLL
DEEM
AFD
DGND
n.c.
FMSO
TOP
1
2
3
4
5
6
7
8
FM0 10
QSSO 11
n.c. 12
n.c. 13
VIF0 14
TAGC 15
REF 16
9
25 n.c.
24 VAGC
23 AFC
22 V
P
21 VPLL
20 AGND
19 n.c.
18 CVBS
17 AMUTE0
001aab344
VIF1
VIF2
i.c.
FMPLL
DEEM
AFD
DGND
FMSO
TOP
1
2
3
4
5
6
7
8
9
24 SIF2
23 SIF1
22 VAGC
21 AFC
20 V
P
19 VPLL
18 AGND
17 CVBS
16 AMUTE0
15 REF
14 TAGC
13 VIF0
001aab340
TDA9881TS
TDA9881HN
FM1 10
FM0 11
QSSO 12
FM1
Transparent top view
Fig 2. Pin configuration for SSOP24.
Fig 3. Pin configuration for HVQFN32.
9397 750 13417
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2004
5 of 42
