INTEGRATED CIRCUITS
DATA SHEET
TDA9812
Multistandard VIF-PLL and
FM-PLL/AM demodulator
Preliminary specification
File under Integrated Circuits, IC02
1995 Mar 21
Philips Semiconductors
Philips Semiconductors
Preliminary specification
Multistandard VIF-PLL and
FM-PLL/AM demodulator
FEATURES
•
5 V positive supply voltage
•
Gain controlled wide band VIF-amplifier (AC-coupled)
•
True synchronous demodulation with active carrier
regeneration (very linear demodulation, good
intermodulation figures, reduced harmonics, excellent
pulse response)
•
Gated phase detector for L/L accent standard
•
VCO frequency switchable between L and L accent
(alignment external) picture carrier frequency
•
Separate video amplifier for sound trap buffering with
high video bandwidth
•
VIF AGC detector for gain control, operating as peak
sync detector for B/G (optional external AGC) and peak
white detector for L; signal controlled reaction time for L
•
Tuner AGC with adjustable Take Over Point (TOP)
•
AFC detector without extra reference circuit
•
AC-coupled limiter amplifier for sound intercarrier signal
•
Alignment-free FM-PLL demodulator with high linearity,
switchable de-emphasis for FM
•
AM-SIF AGC detector for gain controlled SIF amplifier
•
AM demodulator without extra reference circuit
•
Stabilizer circuit for ripple rejection and to achieve
constant output signals.
ORDERING INFORMATION
TYPE
NUMBER
TDA9812
TDA9812T
PACKAGE
NAME
SDIP32
SO28
DESCRIPTION
plastic shrink dual in-line package; 32 leads (400 mil)
plastic small outline package; 28 leads body width 7.5 mm
GENERAL DESCRIPTION
TDA9812
The TDA9812/T is an integrated circuit for multistandard
vision IF signal processing and AM and FM sound
demodulation in TV and VTR sets.
VERSION
SOT232-1
SOT136-1
1995 Mar 21
2
Philips Semiconductors
Preliminary specification
Multistandard VIF-PLL and
FM-PLL/AM demodulator
QUICK REFERENCE DATA
SYMBOL
V
P
I
P
V
i VIF(rms)
V
o CVBS(p-p)
B
−3
PARAMETER
supply voltage
supply current
vision IF input signal voltage
sensitivity (RMS value)
CVBS output signal voltage
(peak-to-peak value)
−3
dB video bandwidth on pin CVBS
B/G and L standard;
C
L
<
20 pF; R
L
>
1 kΩ;
AC load
−1
dB video at output
CONDITIONS
MIN.
4.5
82
−
1.7
7
TYP.
5
96
60
2.0
8
TDA9812
MAX.
5.5
110
100
2.3
−
UNIT
V
mA
µV
V
MHz
S/N(W)
IM
α1.1
IM
α3.3
α
H(sup)
V
i SIF(rms)
V
o(rms)
weighted signal-to-noise ratio for
video
intermodulation attenuation at ‘blue’
intermodulation attenuation at ‘blue’
suppression of harmonics in video
signal
sound IF input signal voltage
sensitivity (RMS value)
audio output signal voltage for FM
(RMS value)
audio output signal voltage for AM
(RMS value)
−3
dB video at AF output
B/G standard;
54% modulation
f = 1.1 MHz
f = 3.3 MHz
56
58
58
35
−
−
60
64
64
40
70
0.5
0.5
−
−
−
−
100
−
−
dB
dB
dB
dB
µV
V
V
L standard; 54% modulation
−
54% modulation
−
−
54% modulation
−
47
THD
total harmonic distortion
FM
AM
0.15
0.5
60
53
0.5
1.0
−
−
%
%
dB
dB
S/N (W)
weighted signal-to-noise ratio
FM
AM
1995 Mar 21
3
1995 Mar 21
handbook, full pagewidth
BLOCK DIAGRAM
TADJ
TOP
CAGC
loop
filter
n.c.
AFC
VCO2
28
(25)
TUNER AND VIF-AGC
VCO TWD
21 (18)
AFC DETECTOR
video
1 V (p-p)
Vo (vid)
3
(3)
19
(16)
7
(5)
25
(22)
24
(21)
23
(20)
6
(4)
18
30
VCO1
n.c.
C BL
TAGC
tuner
AGC
2 x f PC
Philips Semiconductors
T PLL
n.c.
n.c.
Multistandard VIF-PLL and
FM-PLL/AM demodulator
4
5
Vi VIF2
FPLL
VIDEO DEMODULATOR
AND AMPLIFIER
2 (2)
VIF
V i VIF1
1 (1)
VIF AMPLIFIER
4
TDA9812
SIF
AMPLIFIER
INTERCARRIER
MIXER AND
AM DEMODULATOR
SIF-AGC
(7)
9
(6)
8
(9) (17)
11 20
5.5
L/L
switch
SIF
Vo(int)
(23)
26
1/2 VP
CSAGC
C ref
standard
switch
STD
V iFM
n.c.
V i SIF2
32 (28)
VIDEO
BUFFER
10 (8)
22 (19)
15 (13)
CVBS
2 V (p-p)
Vi (vid)
V i SIF1
SIF
31 (27)
INTERNAL VOLTAGE
STABILIZER
FM DETECTOR (PLL)
AF AMPLIFIER
(15) (14) (12) (11)
17 16 14 13
12 (10)
(26)
29
(24)
27
AF/AM
V o AF
MBE452
de-emphasis
5V
VP
GND
DEEM I DEEM O
Preliminary specification
TDA9812
Fig.1 Block diagram (TDA9812T pinning in parenthesis).
Philips Semiconductors
Preliminary specification
Multistandard VIF-PLL and
FM-PLL/AM demodulator
PINNING
SYMBOL
V
i VIF1
V
i VIF2
C
BL
n.c.
n.c.
TADJ
T
PLL
C
SAGC
STD
V
o CVBS
LSWI
V
o AF
DEEM
I
DEEM
O
C
DEC
n.c.
V
i FM
n.c.
TAGC
V
o(int)
V
o(vid)
V
i(vid)
AFC
VCO1
VCO2
C
ref
GND
C
VAGC
V
P
n.c.
V
i SIF1
V
i SIF2
PIN SDIP32
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PIN SO28
1
2
3
−
−
4
5
6
7
8
9
10
11
12
13
14
15
−
16
17
18
19
20
21
22
23
24
25
26
−
27
28
DESCRIPTION
VIF differential input signal voltage 1
VIF differential input signal voltage 2
black level detector
not connected
not connected
tuner AGC take-over adjust (TOP)
PLL loop filter
SIF AGC capacitor
standard switch
CVBS output signal voltage
L/L accent switch
audio voltage frequency output
de-emphasis input
de-emphasis output
decoupling capacitor
not connected
sound intercarrier input voltage
not connected
tuner AGC output
sound intercarrier output voltage
composite video output voltage
video buffer input voltage
AFC output
VCO1 reference circuit for 2f
PC
VCO2 reference circuit for 2f
PC
1
⁄
V
2 P
TDA9812
reference capacitor
ground
VIF AGC capacitor
supply voltage
not connected
SIF differential input signal voltage 1
SIF differential input signal voltage 2
1995 Mar 21
5
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