TDA4470-MFLG3 [TEMIC]

Multistandard Video-IF and Quasi Parallel Sound Processing; 多标准视频- IF和准并行处理声音
TDA4470-MFLG3
型号: TDA4470-MFLG3
厂家: TEMIC SEMICONDUCTORS    TEMIC SEMICONDUCTORS
描述:

Multistandard Video-IF and Quasi Parallel Sound Processing
多标准视频- IF和准并行处理声音

消费电路 商用集成电路 光电二极管
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TDA4470-M  
Multistandard Video-IF and Quasi Parallel Sound Processing  
Description  
The TDA4470 is an integrated bipolar circuit for multi- modulation (e.g., B/G standard), positive modulation  
standard video/sound IF (VIF/SIF) signal processing in (e.g., L standard) and the AM, FM/NICAM sound IF  
TV/VCR and multimedia applications. The circuit signals.  
processes all TV video IF signals with negative  
Features  
5 V supply voltage; low power consumption  
Intercarrier output signal is gain controlled (necessary  
for digital sound processing)  
Active carrier generation by FPLL principle  
(frequency-phase-locked-loop) for true  
synchronous demodulation  
Complete alignment-free AM demodulator with gain  
controlled AF output  
Very linear video demodulation, good pulse response  
and excellent intermodulation figures  
Separate SIF-AGC with average detection  
Two independent SIF inputs  
VCO circuit operates at picture carrier frequency, the  
VCO frequency is switchable for L’-mode  
Parallel operation of the AM demodulator and QPS  
mixer (for NICAM-L stereo sound)  
Alignment-free AFC without external reference  
circuit, polarity of the AFC curve is switchable  
Package and relevant pinning is compatible with the  
single standard version TDA4472, which simplifies  
the design of an universal IF module  
VIF-AGC for negative modulated signals (peak sync.  
detection) and for positive modulation (peak white/  
black level detector)  
Tuner AGC with adjustable take over point  
Alignment-free quasi parallel sound (QPS) mixer for  
FM/NICAM sound IF signals  
Package: SDIP28, SO28  
Ordering Information  
Extended Type Number  
TDA4470-MSD  
TDA4470-MFLG3  
Package  
SDIP28  
SO28  
Remarks  
Delivery in taped form  
TELEFUNKEN Semiconductors  
1 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Block Diagram  
L’ switch  
Loop  
filter  
Offset  
comp.  
VCO  
20  
(optional)  
26  
18  
21  
14  
VCO  
+
phase shift  
Control  
AFC  
0°  
FPLL  
90°  
19  
22  
AFC  
switch  
AFC  
VIF amp  
6
12  
13  
VIF  
Video  
7
C
AGC  
Video det.  
8
Standard  
switch  
AGC  
(VIF)  
Standard  
15  
C
BL  
Tuner  
11  
10  
23  
17  
V
S
Tuner  
AGC  
Supply  
Take over  
point  
C
Ref  
FM det.  
27  
28  
24  
SIF 2  
Intercarrier  
(FM / NICAM)  
SIF amp  
SIF input  
switch  
3
1
2
25  
SIF 1  
AGC  
(SIF)  
AF  
(AM)  
AM det.  
5
4,9,16  
95 10851  
C
AGC  
Figure 1. Block diagram  
2 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Circuit Description  
The oscillator signal passes a phase shifter and supplies  
the in-phase signal (0°) and the quadrature signal (90°)of  
the generated picture carrier.  
Vision IF Amplifier  
The video IF signal (VIF) is fed through a SAW filter to  
the differential input (Pin 6-7) of the VIF amplifier. This  
amplifier consists of three AC-coupled amplifier stages.  
Each differential amplifier is gain controlled by the auto-  
matic gain control (VIF-AGC). The output signal of the  
VIF amplifier is applied to the FPLL carrier generation  
and the video demodulator.  
Video Demodulation and Amplifier  
The video IF signal, which is applied from the gain  
controlled IF amplifier, is multiplied with the inphase  
component of the VCO signal. The video demodulator is  
designed for low distortion and large bandwidth. The  
demodulator output signal passes an integrated low pass  
filter for attenuation of the residual vision carrier and is  
fed to the video amplifier. The video amplifier is realized  
by an operational amplifier with internal feedback and  
8 MHz bandwidth (–3 dB). A standard dependent dc level  
shift in this stage delivers the same sync. level for positive  
and negative modulation. An additional noise clipping is  
provided. The video signal is fed to VIF-AGC and to the  
video output buffer. This amplifier with a 6 dB gain offers  
easy adaption of the sound trap. For nominal video IF  
Tuner-and VIF-AGC  
At Pin 8, the VIF-AGC charges/discharges the AGC  
capacitor to generate a control voltage for setting the gain  
of the VIF amplifier and tuner in order to keep the video  
output signal at a constant level. Therefore, in the case of  
all negative modulated signals (e.g., B/G standard) the  
sync. level of the demodulated video signal is the  
criterion for a fast charge/discharge of the AGC capacitor.  
For positive modulation (e.g., L standard) the peak white  
level of video signal controls the charge current. In order  
to reduce reaction time for positive modulation, where a  
large time constant is needed, an additional black level  
detector controls the discharge current in the event of  
decreasing VIF input signal. The control voltage (AGC  
voltage at Pin 8) is transferred to an internal control  
signal, and is fed to the tuner AGC to generate the tuner  
AGC current at Pin 11 (open collector output). The take  
over point of the tuner AGC can be adjusted at Pin 10 by  
a potentiometer or an external dc voltage (from interface  
circuit or microprocessor).  
modulation the video output signal at Pin 12 is 2 V  
pp.  
Sound IF Amplifier and SIF-AGC  
The SIF amplifier is nearly identical with the 3-stage VIF  
amplifier. Only the first amplifier stage exists twice and  
is switchable by a control voltage at Pin 3. Therefore with  
a minimal external expense it is possible to switch  
between two different SAW filters. Both SIF inputs  
features excellent cross-talk attenuation and an input  
impedance which is independent from the switching  
condition.  
FPLL, VCO and AFC  
The SIF-AGC is related to the average level of AM- or  
FM-carrier and controls the SIF amplifier to provide a  
constant SIF signal to the AM demodulator and QPS  
mixer.  
The FPLL circuit (frequency phase locked loop) consists  
of a frequency and phase detector to generate the control  
voltage for the VCO tuning. In the locked mode, the VCO  
is controlled by the phase detector and in unlocked mode,  
the frequency detector is superimposed. The VCO  
operates with an external resonance circuit (L and C par-  
allel) and is controlled by internal varicaps. The VCO  
control voltage is also converted to a current and repre-  
sents the AFC output signal at Pin 22. At the AFC switch  
(Pin 19) three operating conditions of the AFC are pos-  
sible: AFC curve “rising” or “falling” and AFC “off”.  
AM Demodulator  
The alignment-free AM demodulator is realized by a  
synchronous detector. The modulated SIF signal from the  
SIF amplifier output is multiplied in phase with the  
limited SIF signal (AM is removed). The AF signal of the  
demodulator output is fed to the output amplifier and to  
the SIF-AGC. For all TV standards with negative video  
modulation (e.g., B/G standard), the AF output signal  
(Pin 25) is switched off by the standard switch.  
A practicable VCO alignment of the external coil is the  
adjustment to zero AFC output current at Pin 22. At center  
frequency the AFC output current is equal to zero.  
Furthermore, at Pin 14, the VCO center frequency can be  
switched for setting to the required L’ value (L’ standard).  
Quasi-Parallel-Sound (QPS) Mixer  
The QPS mixer is realized by a multiplier. The SIF signal  
The optional potentiometer at Pin 26 allows an offset (FM or NICAM carrier) is converted to the intercarrier  
compensation of the VCO phase for improved sound frequency by the regenerated picture carrier (quadrature  
quality (fine adjustment). Without a potentiometer (open signal) which is provided from the VCO. The intercarrier  
circuit at Pin 26), this offset compensation is not active.  
signal is fed via an output amplifier to Pin 24.  
TELEFUNKEN Semiconductors  
3 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Standard Switch  
AFC Switch  
The AFC output signal at Pin 22 can be controlled by a  
switching voltage at Pin 19. It is possible to select an AFC  
output signal with a rising- or falling AFC curve and to  
switch off the AFC.  
To have equal polarity of the video output signal the  
polarity can be switched in the demodulation stage in  
accordance with the TV standard. Additional a standard  
dependent dc level shift in the video amplifier delivers the  
same sync. level. In parallel to this, the correct VIF-AGC  
is selected for positive or negative modulated VIF signals.  
In the case of negative modulation (e.g., B/G standard)  
the AM output signal is switched off. For positive modu-  
lation (L standard) the AM demodulator and QPS mixer  
is active. This condition allows a parallel operation of the  
AM sound signal and the NICAM-L stereo sound.  
VCR Mode  
For the VCR mode in a TV set (external video source  
selected), it is recommendable to switch off the IF circuit.  
With an external switching voltage at Pin 6 or 7, the IF  
amplifiers are switched off and all signal output levels at  
Pins 12, 24, and 25 are according to the internal dc  
voltage.  
L’ Switch  
Internal Voltage Stabilizer  
With a control voltage at Pin 14 the VCO frequency can  
be switched for setting to the required L’ value (L’  
standard). Also a fine adjustment of the L’-VCO center  
frequency is possible via a potentiometer. The L’ switch  
is only active for positive modulated video IF-signals  
(standard switch in L mode).  
The internal bandgap reference ensures constant perfor-  
mance independent of supply voltage and temperature.  
4 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Pin Description  
Pin  
1, 2  
3
Symbol  
V ,  
Function  
SIF1 input (symmetrical)  
Input selector switch  
Ground  
V
i,SIF2  
V
1
2
3
4
28  
27  
26  
i,SIF1  
i SIF1  
V
sw  
V
i,SIF2  
V
i,SIF1  
4, 9, 16  
5
GND  
C
V
SIF-AGC (time constant)  
VIF input (symmetrical)  
VIF-AGC (time constant)  
Take over point, tuner AGC  
Tuner AGC output current  
Video output  
AGC  
V
sw  
R
comp  
6, 7  
8
i, VIF  
C
AGC  
10  
R
top  
tun  
GND  
V
o,AM  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
11  
I
12  
V
o,vid  
C
AGC  
V
o,FM  
5
6
13  
V
Standard switch  
SW  
SW  
14  
V
L’ switch  
V
i,VIF  
V
V
S
15  
C
bl  
Black level capacitor  
Internal reference voltage  
Loop filter  
17  
C
ref  
V
AFC  
7
i,VIF  
18  
LF  
19  
V
sw  
AFC switch  
C
V
AGC  
20, 21  
22  
V
VCO  
VCO circuit  
VCO  
8
V
AFC  
AFC output  
23  
V
S
Supply voltage  
GND  
V
V
9
VCO  
sw  
24  
V ,  
O FM  
V
O, AM  
Intercarrier output  
AF output – AM sound  
Offset compensation  
SIF 2 input (symmetrical)  
25  
R
top  
10  
11  
12  
26  
R
comp  
27, 28  
V
i, SIF2  
I
tun  
LF  
C
V
Ref  
o,vid  
V
sw  
V
sw  
GND  
13  
14  
C
BL  
94 8680  
Figure 2. Pinning  
TELEFUNKEN Semiconductors  
5 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Absolute Maximum Ratings  
Reference point Pin 4 (9, 16), unless otherwise specified  
Parameters  
Symbol  
Value  
Unit  
Supply voltage  
SDIP28 package  
SO28 package  
Supply current  
Pin 23  
V
V
9.0  
6.0  
V
V
S
S
Pin 23  
I
93  
mA  
s
Power dissipation  
SDIP28 package  
SO28 package  
P
P
840  
560  
mW  
mW  
Output currents  
Pins 12, 24 and 25  
I
5
mA  
out  
External voltages  
Pins 1, 2, 5 to 8, 10, 12, 14, 17, 18 and 24 to 28  
Pins 15, 20 and 21  
Pin 11  
+4.5  
+3.5  
+13.5  
V
V
V
V
V
ext  
Pins 3, 13, 19 and 22  
V
S
Junction temperature  
Storage temperature  
Electrostatic handling all pins  
T
+125  
–25 to +125  
300  
°C  
°C  
V
j
T
stg  
*)  
V
ESD  
*)  
Equivalent to discharging a 200 pF capacitor trough a 0 resistor.  
Operating Range  
Parameters  
Symbol  
Value  
Unit  
Supply voltage range  
SDIP28 package  
Pin 23  
V
S
V
S
4.5 to 9.0  
4.5 to 6.0  
V
V
SO28 package  
Ambient temperature  
T
amb  
–10 to +85  
°C  
Thermal Resistance  
Parameters  
Symbol  
Maximum  
Unit  
Junction ambient, when soldered to PCB  
SDIP28 package  
R
thJA  
R
thJA  
55  
75  
K/W  
K/W  
SO28 package  
6 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Electrical Characteristics  
V = +5 V, T  
= +25°C; reference point Pin 4 (9, 16), unless otherwise specified  
S
amb  
Parameters  
DC-supply  
Test Conditions / Pins  
Pin 23  
Symbol  
Min.  
Typ.  
Max.  
Unit  
Supply voltage – SDIP28  
– SO28  
V
S
V
S
4.5  
4.5  
5.0  
5.0  
9.0  
5.5  
V
V
Supply current  
I
85  
93  
mA  
S
VIF-input  
Pin 6-7  
Input sensitivity, (RMS value)  
Input impedance  
Input capacitance  
For FPLL locked  
See note 1  
See note 1  
v
R
C
80  
1.2  
2
120  
V
RMS  
k
pF  
in  
in  
in  
VIF-AGC  
Pins 8 and 15  
IF gain control range  
AGC capacitor  
Black level capacitor  
Switching voltage: VCR mode  
Switching current: VCR mode  
Tuner-AGC  
G
C
AGC  
60  
65  
2.2  
100  
4.0  
50  
dB  
F
nF  
V
v
Pin 8  
Pin 15  
C
BL  
See note 2  
See note 2  
V
sw  
sw  
I
A
Pins 10 and 11 see note 3  
Available tuner-AGC current  
Allowable output voltage  
IF slip – tuner AGC  
IF input signal for minimum  
take over point  
I
V
G  
v
1
0.3  
2
8
4
13.5  
10  
4
mA  
V
dB  
mV  
tun  
11  
Current I : 10 to 90%  
tun  
IF  
R
top  
= 10 k (V = 4.5 V)  
top  
in  
IF input signal for maximum  
take over point  
Variation of the take over point T  
R
= 0, (V = 0.8 V)  
v
40  
mV  
dB  
top  
top  
in  
= 55°C  
v  
2
3
amb  
in  
by temperature  
VIF-AGC: G = 46 dB  
v
FPLL and VCO  
Pins 18, 20, 21 and 26 see note 4  
Max. oscillator frequency  
Vision carrier capture range  
For carrier generation  
= 38.9 MHz,  
f
f  
70  
±1.5  
MHz  
MHz  
vco  
f
±2  
vco  
cap  
C
vco  
= 8.2 pF  
Oscillator drift (free running) as See note 5,  
f/  
–0.3  
%
T  
function of temperature  
∆Τ  
= 55°C,  
amb  
C
vco  
= 8.2 pF,  
f
= 38.9 MHz  
vco  
Video output  
Pin 12  
Output current – source  
– sink  
±I  
5
3
mA  
mA  
12  
2
Output resistance  
See note 1  
Peak-to-peak value  
Between B/G and L  
R
100  
2.2  
10  
out  
Video output signal  
Difference of the video signals  
Sync. level  
v ,  
1.8  
2.0  
Vpp  
%
V
o vid  
v  
o,vid  
sync  
V
1.2  
3.4  
Zero carrier level for neg.  
V
13  
= V  
V
DC  
V
S
modulation, ultra white level  
V = 3 V  
8
Zero carrier level for pos.  
modulation, ultra black level  
Supply voltage influence on the  
ultra white and ultra black level  
Video bandwidth (–3 dB)  
V
= 0  
V
1.15  
1
V
13  
DC  
V = 3 V  
8
V/  
%/V  
MHz  
V
R 1 k , C 50 pF  
L
B
6
8
L
TELEFUNKEN Semiconductors  
7 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Parameters  
Video frequency response over  
the AGC range  
Test Conditions / Pins  
Symbol  
∆Β  
Min.  
Typ.  
Max.  
2.0  
Unit  
dB  
Differential gain error  
Differential phase error  
Intermodulation  
1.07 MHz  
Video signal to noise ratio  
Residual vision carrier  
DG  
DP  
2
2
60  
5
5
%
deg  
dB  
See note 6  
52  
56  
IM  
Weighted, CCIR-567  
S/  
N
60  
2
dB  
mV  
v
res1  
10  
fundamental wave 38.9 MHz  
and second harmonic 77.8 MHz  
Lower limiting level  
Upper limiting level  
Ripple rejection  
Below sync level  
Above ultra white level  
See note 1, Pin 23/Pin 12  
V  
V  
RR  
400  
600  
mV  
mV  
dB  
lim1  
lim2  
35  
Standard switch  
Pin 13  
Control voltage for mode 1:  
neg. modulated video-IF signals  
and AM/NICAM sound  
Control voltage for mode 2:  
pos. modulated video-IF signals  
and AM/L-NICAM sound  
See note 7  
V
V
2.0  
V
V
V
A
SW  
SW  
SW  
S
0
0.8  
Switching current  
AFC output  
I
±100  
Pin 22  
Control slope  
I/  
0.7  
0.25  
A/kHz  
%
f  
Frequency drift by temperature Related to the picture  
carrier frequency  
Output voltage  
upper limit  
0.6  
0.4  
V
AFC  
V –0.4  
S
V
V
lower limit  
Output current  
I
±0.2  
mA  
AFC  
AFC switch  
Pin 19  
Control voltage: AFC “off”  
AFC curve rising  
AFC curve falling  
Switching current  
V
0
1.5  
3.5  
0.8  
2.5  
V
V
V
SW  
See note 8  
See note 9  
V
S
I
±100  
A
SW  
L’ switch  
Pin 14  
Control voltage:  
L’ frequency +  
L’-VCO alignment  
L standard  
V
SW  
0
3.0  
V
3.4  
V
S
V
A
Switching current  
SIF inputs  
Input sensitivity  
(RMS value)  
V
SW  
= 0  
I
700  
80  
SW  
Pin 1-2, 27-28  
Output signal  
at Pin 24/25: –3 dB  
v
120  
V
RMS  
in  
Input impedance  
Input capacitance  
SIF-AGC  
See note 1  
See note 1  
R
C
1.2  
2
k
pF  
in  
in  
Pin 5  
IF gain control range  
AGC capacitor  
G
60  
65  
10  
dB  
F
v
C
AGC  
Intercarrier output-FM  
DC output voltage  
Pin 24  
see note 10  
V
DC  
2
V
8 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Parameters  
Output resistance  
Sound IF output voltage  
(5.5 MHz output voltage)  
Test Conditions / Pins  
See note 1  
v = 10 mV  
in  
Symbol  
Min.  
180  
Typ.  
150  
250  
Max.  
Unit  
R
out  
out  
v
350  
mV  
RMS  
Weighted signal to noise ratio:  
(CCIR 468)  
Ref. signal:  
v = 10 mV;  
in  
FM dev. = ±27 kHz  
f
= 1 kHz;  
mod  
tested with the double  
FM demod. U2860B;  
B/G modulated VIF signal  
Black screen: Channel 1/2  
Grid pattern: Channel 1/2  
Grey screen 50%: Channel  
1/2  
S/N  
S/N  
S/N  
60/58  
54/52  
60/57  
dB  
dB  
dB  
Ripple rejection  
AF output-AM  
DC output voltage  
Output resistance  
AF output voltage  
Total harmonic distortion  
See note 1, Pin 23/Pin 24  
Pin 25  
RR  
35  
dB  
V
see note 11  
V
R
2.2  
150  
500  
1
DC  
See note 1  
m = 54%  
out  
v
oAF  
400  
630  
2
mV  
RMS  
THD  
%
f
= 1 kHz and 12.5 kHz  
mod  
Signal to noise ratio  
Reference: m = 54 %,  
= 1 kHz,  
S/N  
65  
dB  
f
mod  
22 kHz low pass filter  
See note 1, Pin 23/Pin 25  
Pin 3  
Ripple rejection  
SIF input selector switch  
RR  
28  
dB  
Control voltage:  
input 1 active  
input 2 active  
See note 12  
V
SW  
2.0  
0
V
0.8  
V
V
S
Switching current  
I
±100  
A
SW  
Notes  
1.)  
This parameter is given as an application information and not tested during production.  
In VCR mode the VIF- and SIF path is switched off.  
2.)  
3.)  
4.)  
Adjustment of turn over point (delayed tuner AGC) with external resistor R or external voltage V possible.  
top  
top  
Resonance circuit of VCO (f = 38.9 MHz): C  
= 8.2 – 10 pF,  
o
VCO  
Coil L  
with unloaded Q-factor Q  
60 for an oscillator voltage 100 mV  
at Pin 20 – 21  
VCO  
o
RMS  
(e.g. TOKO coil 7 KM, 292 XNS - 4051Z)  
The oscillator drift is related to the picture carrier frequency, at external temperature-compensated LC circuit.  
1.07) = 20 log (4.43 MHz component/1.07 MHz component); (1.07) value related to black-white signal  
5.)  
6.)  
input signal conditions:  
picture carrier = 0 dB, colour carrier = –6 dB, sound carrier = –24 dB  
7.)  
Without external control at Pin 13 the IC automatically operates in mode 1:  
negative modulated video-IF signals and FM/NICAM sound signals.  
Without control voltage at Pin 19 falling AFC curve is automatically selected.  
With open circuit at Pin 14 the L’ switch is not active.  
8.)  
9.)  
10.)  
Picture carrier PC = 38.9 MHz; sound carrier SC = 33.4 MHz, SC = 33.16 MHz;  
1
2
PC/SC =13 dB; PC/SC = 20 dB; PC unmodulated (equivalent to sync. peak level).  
1
2
11.)  
12.)  
Sound carrier SC = 32.4 MHz, modulated with f  
= 1 kHz, m = 54%; v =10 mV  
mod  
in  
Without control voltage at Pin 3 the SIF input 1 is automatically selected.  
TELEFUNKEN Semiconductors  
9 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Intercarrier  
(FM/NICAM)  
AF  
(AM)  
AFC  
SIF 2  
AFC  
switch  
+V  
S
Loop  
comp.  
Loop  
filter  
Black  
level  
*)  
22 F  
150  
L
VCO  
8.2 pF  
C
Ref  
10 k  
C
VCO  
470 nF  
470 nF  
18  
17  
12  
16  
15  
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
1
2
10  
11  
13  
14  
6
7
8
9
3
4
5
22 K  
10 F  
10 k  
2.2 F  
AGC (SIF)  
AGC (VIF)  
Video  
neg/pos  
SIF  
Input switch  
L’  
VIF  
Tuner  
delay  
SIF 1  
Tuner Video  
AGC  
*
)
external L/C circuit (VCO 38.9 MHz)  
with TOKO coil 7KM, 292 XNS – 4051Z  
Figure 3. Test circuit  
10 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
*)  
External L/C circuit (VCO: 38.9 MHz)  
with TOKO coil 7KM, 292 XNS – 4051Z  
Figure 4. Basic application circuit  
TELEFUNKEN Semiconductors  
11 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Internal Pin Configuration  
1, 27  
2, 28  
2 k  
2 k  
2 k  
2 k  
3 V  
2.3 V  
20 k  
4.2 V  
94 8521  
94 8524  
Figure 5. Sound IF inputs (Pin 1-2, 27-28)  
Figure 8. Video IF input (Pin 6-7)  
3.5 V  
60 k  
94 8525  
10 k  
3
8
94 8522  
Figure 6. Input selector switch (Pin 3)  
Figure 9. VIF-AGC time constant (Pin 8)  
3.5 V  
5
6.5 k  
6 k  
94 8523  
94 8526  
Figure 7. SIF-AGC time constant (Pin 5)  
Figure 10. Tuner AGC – take over point (Pin 10)  
12 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
94 8527  
2.7 V  
5 k  
15  
Figure 11. Tuner AGC – output (Pin 11)  
94 8530  
Figure 14. Black level capacitor (Pin 15)  
2.6 mA  
3.5 V  
94 8528  
Figure 12. Video output (Pin 12)  
94 8531  
Figure 15. Internal reference voltage (Pin 17)  
3.5 V  
17 k  
15.5 k  
13  
23 k  
2.75 V  
94 8529  
94 8532  
Figure 13. Standard switch (Pin 13)  
Figure 16. Loop filter (Pin 18)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
13 (16)  
Preliminary Information  
TDA4470-M  
3.5 V  
30 k  
100  
19  
24  
10.5 k  
1 mA  
94 8533  
94 8536  
Figure 17. AFC switch (Pin 19)  
Figure 20. Intercarrier output (Pin 24)  
7 k  
7 k  
25  
100  
94 8534  
1.4 mA  
Figure 18. VCO (Pin 20-21)  
94 8537  
Figure 21. AF output AM sound (Pin 25)  
94 8538  
3.5 V  
10 k  
10 k  
94 8535  
Figure 19. AFC output (Pin 22)  
Figure 22. VCO offset compensation (Pin 26)  
14 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Dimensions in mm  
Package: SDIP28  
95 10610  
Package: SO28  
95 10610  
95 9932  
TELEFUNKEN Semiconductors  
15 (16)  
Rev. A2, 15-Oct-96  
Preliminary Information  
TDA4470-M  
Ozone Depleting Substances Policy Statement  
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to  
1. Meet all present and future national and international statutory requirements.  
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems  
with respect to their impact on the health and safety of our employees and the public, as well as their impact on  
the environment.  
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as  
ozone depleting substances (ODSs).  
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and  
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban  
on these substances.  
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of  
continuous improvements to eliminate the use of ODSs listed in the following documents.  
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively  
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental  
Protection Agency (EPA) in the USA  
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.  
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain  
such substances.  
We reserve the right to make changes to improve technical design and may do so without further notice.  
Parameters can vary in different applications. All operating parameters must be validated for each customer  
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized  
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,  
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or  
unauthorized use.  
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany  
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423  
16 (16)  
TELEFUNKEN Semiconductors  
Rev. A2, 15-Oct-96  
Preliminary Information  

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