TDA4470-MFSG3Y [ATMEL]

Audio/Video Demodulator, AM/FM, Bipolar, PDSO28, ROHS COMPLIANT, SSOP-28;
TDA4470-MFSG3Y
型号: TDA4470-MFSG3Y
厂家: ATMEL    ATMEL
描述:

Audio/Video Demodulator, AM/FM, Bipolar, PDSO28, ROHS COMPLIANT, SSOP-28

光电二极管 商用集成电路
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Features  
5V Supply Voltage  
Active Carrier Generation by FPLL (Frequency-Phase-Locked Loop) Principle for True  
Synchronous Demodulation  
VCO Circuit Operates at Picture Carrier Frequency, the VCO frequency  
is Switchable for L-mode  
Alignment-free AFC without External Reference Circuit, Polarity of the  
AFC Curve is Switchable  
Multistandard  
Video-IF and  
Quasi Parallel  
Sound  
VIF-AGC for Negatively Modulated Signals (Peak Synchronous  
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  
Intercarrier Output Signal is Gain Controlled (Necessary for Digital Sound Processing)  
Complete Alignment-free AM Demodulator with Gain Controlled AF Output  
Separate SIF-AGC with Average Detection  
Processing IC  
Two Independent SIF Inputs  
Parallel Operation of the AM Demodulator and QPS Mixer (for NICAM-L Stereo Sound)  
Pb-free Package, which is Compliant with Requirements of RoHS  
TDA4470  
Benefits  
Linear Video Demodulation  
Good Pulse Response  
Excellent Intermodulation Figures  
1. Description  
The TDA4470 is an integrated bipolar circuit for multistandard video/sound IF  
(VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit pro-  
cesses all TV video IF signals with negative modulation (e.g., B/G standard), and the  
FM/NICAM sound IF signals.  
Rev. 4803C–TVVCR–10/05  
Figure 1-1. Block Diagram  
L' switch  
Offset  
comp.  
(optional)  
Loop  
filter  
VCO  
21  
20  
14  
26  
18  
VCO  
+
phase shift  
Control  
AFC  
0°  
FPLL  
90°  
19  
22  
AFC  
switch  
AFC  
VIF amp  
6
12  
13  
VIF  
7
Video  
CAGC  
Video det.  
8
Standard  
switch  
AGC  
(VIF)  
Standard  
15  
CBL  
Tuner  
11  
10  
23  
17  
VS  
Tuner  
AGC  
Supply  
CRef  
Take-over  
point  
FM det.  
27  
28  
24  
Intercarrier  
SIF 2  
(FM/NICAM)  
SIF amp  
SIF input  
switch  
3
1
2
25  
AGC  
(SIF)  
AF  
(AM)  
SIF 1  
AM det.  
5
4, 9,16  
CAGC  
2
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
2. Circuit Description  
2.1  
Vision IF Amplifier  
The video IF signal (VIF) is fed through a SAW filter to the differential input (pins 6-7) of the VIF  
amplifier. This amplifier consists of three AC-coupled amplifier stages. Each differential amplifier  
is gain controlled by the automatic gain control (VIF-AGC). The output signal of the VIF amplifier  
is applied to the FPLL carrier generation and the video demodulator.  
2.2  
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 con-  
stant level. Therefore, the synchronous 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 the video signal controls the charge current. In order to reduce the 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 an  
interface circuit or microprocessor).  
2.3  
FPLL, VCO and AFC  
The FPLL (Frequency-Phase-Locked Loop) circuit consists of a frequency and phase detector to  
generate the control voltage for the VCO tuning. In locked mode, the VCO is controlled by the  
phase detector, in unlocked mode, the frequency detector is superimposed. The VCO operates  
with an external resonance circuit (L and C in parallel) and is controlled by internal varicaps. The  
VCO control voltage is also converted to a current and represents the AFC output signal at pin  
22. At the AFC switch (pin 19) three operating conditions of the AFC are possible: the AFC curve  
“rising” or “falling” and AFC “off”.  
A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at  
pin 22. At the center frequency, the AFC output current is equal to zero. Furthermore, at pin 14,  
the VCO center frequency can be switched to set it to the required L’ value (L’ standard).  
The optional potentiometer at pin 26 allows an offset compensation of the VCO phase for  
improved sound quality (fine adjustment). Without a potentiometer (open circuit at pin 26), this  
offset compensation is not active.  
The oscillator signal passes a phase shifter and supplies the in-phase signal (0°) and the  
quadrature signal (90°) of the generated picture carrier.  
3
4803C–TVVCR–10/05  
2.4  
Video Demodulation and Amplifier  
The video IF signal, which is applied from the gain-controlled IF amplifier, is multiplied with the  
in-phase 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 stan-  
dard dependent DC level shift in this stage delivers the same synchronous level for positive and  
negative modulation. An additional noise clipping is provided. The video signal is fed to the  
VIF-AGC and to the video output buffer. This amplifier with a gain of 6 dB offers easy adoption of  
the sound trap. For a nominal video IF modulation, the video output signal at pin 12 is 2 VPP.  
2.5  
Sound IF Amplifier and SIF-AGC  
The SIF amplifier is nearly identical with the 3-stage VIF amplifier, except that the first amplifier  
stage exists twice and is switchable by a control voltage at pin 3. Therefore, it is possible to  
switch between two different SAW filters with minimal external expense. Both SIF inputs fea-  
tures excellent cross-talk attenuation and an input impedance which is independent from the  
switching condition.  
The SIF-AGC is related to the average level of the AM or FM carrier and controls the SIF ampli-  
fier to provide a constant SIF signal to the AM demodulator and QPS mixer.  
2.6  
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 out-  
put signal (pin 25) is switched off by the standard switch.  
2.7  
2.8  
Quasi Parallel Sound (QPS) Mixer  
The QPS mixer is realized by a multiplier. The SIF signal (FM or NICAM carrier) is converted to  
the intercarrier frequency by the regenerated picture carrier (quadrature signal) which is pro-  
vided from the VCO. The intercarrier signal is fed via an output amplifier to pin 24.  
Standard Switch  
To have equal polarity of the video output signal the polarity can be switched in the demodula-  
tion stage in accordance with the TV standard. Additionally 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 positively or negatively modulated VIF signals. In the case of negative modulation  
(e.g., B/G standard) the AM output signal is switched off. For positive modulation (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.  
2.9  
L’ Switch  
With a control voltage at pin 14 the VCO frequency can be switched in order to set 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 positively modulated video IF-signals (standard  
switch in L mode).  
4
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
2.10 AFC Switch  
2.11 VCR Mode  
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.  
For VCR mode in a TV set (external video source selected), it is recommended 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.  
2.12 Internal Voltage Stabilizer  
The internal bandgap reference ensures constant performance independent of supply voltage  
and temperature.  
5
4803C–TVVCR–10/05  
3. Pin Configuration  
Figure 3-1. Pinning SO28/SSO28  
VI,SIF1  
VI,SIF1  
1
2
28  
VI,SIF2  
27 VI,SIF2  
3
26  
25  
VSW  
GND  
RCOMP  
VO,AM  
4
24 VO,FM  
CAGC  
VI,VIF  
5
6
23  
VS  
7
22 VAFC  
VI,VIF  
CAGC  
8
21  
20  
VVCO  
VVCO  
GND  
9
RTOP  
10  
11  
12  
13  
19  
VSW  
ITUN  
18 LF  
VO,VID  
CREF  
17  
16  
15  
VSW  
GND  
CBL  
VSW 14  
6
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
Table 3-1.  
Pin Description  
Pin  
1, 2  
3
Symbol  
VI,SF1  
VSW  
Function  
SIF1 input (symmetrical)  
Input selector switch  
Ground  
4, 9, 16  
5
GND  
CAGC  
VI,VIF  
CAGC  
RTOP  
ITUN  
SIF-AGC (time constant)  
VIF input (symmetrical)  
VIF-AGC (time constant)  
Take-over point, tuner AGC  
Tuner AGC output current  
Video output  
6, 7  
8
10  
11  
12  
VO,VID  
VSW  
13  
Standard switch  
14  
VSW  
L’ switch  
15  
CBL  
Black level capacitor  
Internal reference voltage  
Loop filter  
17  
CREF  
LF  
18  
19  
VSW  
AFC switch  
20, 21  
22  
VVCO  
VAFC  
VS  
VCO circuit  
AFC output  
23  
Supply voltage  
24  
VO,FM  
VO,AM  
RCOMP  
VI,SIF2  
Intercarrier output  
AF output - AM sound  
Offset compensation  
SIF 2 input (symmetrical)  
25  
26  
27, 28  
7
4803C–TVVCR–10/05  
4. Absolute Maximum Ratings  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating  
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this  
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.  
Reference point pin 4 (9, 16), unless otherwise specified  
Parameters  
Symbol  
Value  
Unit  
Supply voltage, pin 23  
SO28 and SSO28 package  
VS  
IS  
6.0  
93  
V
Supply current, pin 23  
mA  
Power dissipation  
SO28 and SSO28 package  
P
560  
5
mW  
mA  
Output currents, pins 12, 24 and 25  
IOUT  
External voltages  
Pins 1, 2, 5 to 8, 10, 12, 18 and 24 to 28  
Pins 15, 20 and 21  
Pin 11  
+4.5  
+3.5  
+13.5  
VS  
V
V
V
V
Vext  
Pins 3, 13, 19 and 22  
Junction temperature  
Tj  
+125  
–25 to +125  
±300  
°C  
°C  
V
Storage temperature  
Electrostatic handling(1), all pins  
Tstg  
VESD  
Note:  
1. Equivalent to discharging a 200 pF capacitor through a 0resistor.  
5. Thermal Resistance  
Parameters  
Symbol  
Value  
Unit  
Junction ambient, when soldered to PCB  
SO28 package  
SSO28 package  
RthJA  
RthJA  
75  
130  
K/W  
K/W  
6. Operating Range  
Parameters  
Symbol  
Value  
Unit  
Supply voltage range, pin 23  
SO28 and SSO28 package  
VS  
4.5 to 6.0  
V
Ambient temperature  
Tamb  
–10 to +85  
°C  
8
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
7. Electrical Characteristics  
VS = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.  
Parameters  
DC-supply  
Test Conditions  
Pin  
23  
Symbol  
Min.  
Typ.  
Max.  
Unit  
Supply voltage, SO28, SSO28  
VS  
IS  
4.5  
5.0  
85  
5.5  
93  
V
Supply current  
mA  
VIF-input  
6-7  
Input sensitivity (RMS value)  
Input impedance  
Input capacitance  
VIF-AGC  
For FPLL locked  
VIN  
RIN  
CIN  
80  
1.2  
2
120  
µVRMS  
kΩ  
(1)  
(1)  
pF  
8 and 15  
IF gain control range  
AGC capacitor  
GV  
CAGC  
CBL  
VSW  
ISW  
60  
65  
2.2  
100  
4.0  
50  
dB  
µF  
nF  
V
8
Black level capacitor  
15  
Switching voltage: VCR mode (2)  
Switching current: VCR mode (2)  
Tuner-AGC  
µA  
10 and 11(3)  
Available tuner-AGC current  
Allowable output voltage  
Itun  
V11  
1
2
8
4
mA  
V
0.3  
13.5  
10  
IF slip - tuner AGC  
Current ITUN: 10% to 90%  
GIF  
dB  
IF input signal for minimum  
take-over point  
RTOP = 10 k(VTOP = 4.5V)  
VIN  
VIN  
4
3
mV  
mV  
dB  
IF input signal for maximum  
take-over point  
RTOP = 0, (VTOP = 0.8V)  
40  
Variation of the take-over point Tamb = 55°C  
by temperature VIF-AGC: GV = 46 dB  
VIN  
2
Notes: 1. This parameter is given as an application information and has not been tested during production.  
2. In VCR mode, the VIF- and SIF path is switched off.  
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is  
possible.  
4. Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 - 10 pF,  
Coil LVCO with unloaded Q-factor Qo 60 for an oscillator voltage 100 mVRMS at pin 20 - 21  
(e.g., TOKO® coil 7 KM, 292 XNS - 4051Z).  
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.  
6. α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal  
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:  
negatively modulated video-IF signals and FM/NICAM sound signals.  
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.  
9. With an open circuit at pin 14 the Lswitch is not active.  
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;  
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).  
11. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; VIN =10 mV  
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.  
9
4803C–TVVCR–10/05  
7. Electrical Characteristics (Continued)  
VS = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.  
Parameters  
Test Conditions  
Pin  
Symbol  
Min.  
Typ.  
Max.  
Unit  
18, 20,  
FPLL and VCO  
21 and 26(4)  
Maximum oscillator frequency For carrier generation  
fVCO  
70  
MHz  
MHz  
fVCO = 38.9 MHz,  
Vision carrier capture range  
fcap  
±1.5  
±2  
CVCO = 8.2 pF  
(5)  
Oscillator drift (free running) as Tamb = 55°C,  
f/t  
–0.3  
%
function of temperature  
Cvco = 8.2 pF,  
vco = 38.9 MHz  
f
Video Output  
12  
Output current  
- source  
- sink  
5
3
mA  
mA  
±I12  
2
Output resistance  
Video output signal  
(1)  
Rout  
100  
2.2  
10  
Vpp  
%
Peak-to-peak value  
VO,VID  
VO,VID  
VSYNC  
1.8  
2.0  
Difference of the video signals Between B/G and L  
Synchronous level  
1.2  
3.4  
V
Zero carrier level for negative V13 = VS  
modulation, ultra white level  
VDC  
VDC  
V
V
V8 = 3V  
Zero carrier level for positive  
modulation, ultra black level  
V13 = 0  
V8 = 3V  
1.15  
Supply voltage influence on the  
ultra white and ultra black level  
V/V  
B
1
8
%/V  
MHz  
dB  
Video bandwidth (–3 dB)  
RL 1 k, CL 50 pF  
6
Video frequency response over  
the AGC range  
B  
G  
2.0  
5
Differential gain error  
2
%
Notes: 1. This parameter is given as an application information and has not been tested during production.  
2. In VCR mode, the VIF- and SIF path is switched off.  
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is  
possible.  
4. Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 - 10 pF,  
Coil LVCO with unloaded Q-factor Qo 60 for an oscillator voltage 100 mVRMS at pin 20 - 21  
(e.g., TOKO® coil 7 KM, 292 XNS - 4051Z).  
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.  
6. α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal  
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:  
negatively modulated video-IF signals and FM/NICAM sound signals.  
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.  
9. With an open circuit at pin 14 the Lswitch is not active.  
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;  
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).  
11. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; VIN =10 mV  
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.  
10  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
7. Electrical Characteristics (Continued)  
VS = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.  
Parameters  
Test Conditions  
Pin  
Symbol  
P  
Min.  
Typ.  
2
Max.  
Unit  
deg  
dB  
Differential phase error  
Intermodulation 1.07 MHz  
Video signal-to-noise ratio  
5
(6)  
αIM  
52  
56  
60  
60  
Weighted, CCIR-567  
S/N  
dB  
Residual vision carrier  
fundamental wave 38.9 MHz  
and second harmonic  
77.8 MHz  
Vres1  
2
10  
mV  
Lower limiting level  
Upper limiting level  
Ripple rejection  
Below synchronous level  
Above ultra white level  
Pin 23/pin 12(1)  
Vlim1  
Vlim2  
RR  
400  
600  
mV  
mV  
dB  
35  
Standard Switch  
13  
Control voltage for mode 1:  
negatively modulated video-IF (7)  
signals and AM/NICAM sound  
VSW  
2.0  
VS  
V
Control voltage for mode 2:  
positively modulated video-IF  
signals and AM/L-NICAM  
sound  
VSW  
0
0.8  
V
Switching current  
AFC Output  
ISW  
±100  
µA  
22  
Control slope  
I/f  
0.7  
µA/kHz  
%
Related to the picture carrier  
frequency  
Frequency drift by temperature  
0.25  
0.6  
0.4  
Output voltage  
- upper limit  
- lower limit  
VAFC  
IAFC  
VS – 0.4  
V
V
Output current  
±0.2  
mA  
Notes: 1. This parameter is given as an application information and has not been tested during production.  
2. In VCR mode, the VIF- and SIF path is switched off.  
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is  
possible.  
4. Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 - 10 pF,  
Coil LVCO with unloaded Q-factor Qo 60 for an oscillator voltage 100 mVRMS at pin 20 - 21  
(e.g., TOKO® coil 7 KM, 292 XNS - 4051Z).  
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.  
6. α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal  
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:  
negatively modulated video-IF signals and FM/NICAM sound signals.  
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.  
9. With an open circuit at pin 14 the Lswitch is not active.  
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;  
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).  
11. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; VIN =10 mV  
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.  
11  
4803C–TVVCR–10/05  
7. Electrical Characteristics (Continued)  
VS = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.  
Parameters  
AFC Switch  
Test Conditions  
Pin  
19  
Symbol  
Min.  
Typ.  
Max.  
Unit  
Control voltage:  
AFC “off”  
AFC curve rising  
AFC curve falling  
0
1.5  
3.5  
0.8  
2.5  
VS  
V
V
V
(8)  
VSW  
Switching current  
ISW  
±100  
µA  
L’ switch  
14  
Control voltage:  
L’ frequency +  
L-VCO alignment  
VSW  
0
3.0  
VS  
V
L standard  
(9)  
3.4  
V
Switching current  
SIF Inputs  
VSW = 0  
ISW  
700  
80  
µA  
1-2, 27-28  
Input sensitivity  
(RMS value)  
Output signal  
at pin 24/25: –3 dB  
VIN  
120  
µVRMS  
Input impedance  
Input capacitance  
SIF-AGC  
(1)  
(1)  
RIN  
CIN  
1.2  
2
kΩ  
pF  
5
IF gain control range  
AGC capacitor  
GV  
60  
65  
10  
dB  
µF  
CAGC  
Intercarrier Output-FM  
DC output voltage  
Output resistance  
24(10)  
VDC  
2
V
(1)  
ROUT  
150  
Sound IF output voltage  
(5.5 MHz output voltage)  
VIN = 10 mV  
VOUT  
180  
250  
350  
mVRMS  
Notes: 1. This parameter is given as an application information and has not been tested during production.  
2. In VCR mode, the VIF- and SIF path is switched off.  
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is  
possible.  
4. Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 - 10 pF,  
Coil LVCO with unloaded Q-factor Qo 60 for an oscillator voltage 100 mVRMS at pin 20 - 21  
(e.g., TOKO® coil 7 KM, 292 XNS - 4051Z).  
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.  
6. α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal  
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:  
negatively modulated video-IF signals and FM/NICAM sound signals.  
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.  
9. With an open circuit at pin 14 the Lswitch is not active.  
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;  
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).  
11. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; VIN =10 mV  
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.  
12  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
7. Electrical Characteristics (Continued)  
VS = +5V, Tamb = +25°C; reference point pin 4 (9, 16), unless otherwise specified.  
Parameters  
Test Conditions  
Pin  
Symbol  
Min.  
Typ.  
Max.  
Unit  
Reference signal:  
VIN = 10 mV  
FM deviation = ±27 kHz  
fmod = 1 kHz  
Weighted signal-to-noise ratio: tested with the double  
(CCIR 468)  
FM demodulated 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  
(1)  
23, 24  
25(11)  
RR  
35  
dB  
VDC  
ROUT  
VOAF  
2.2  
150  
500  
V
(1)  
400  
630  
2
mVRMS  
m = 54%  
Total harmonic distortion  
THD  
1
%
f
mod = 1 kHz and 12.5 kHz  
Reference: m = 54%,  
fmod = 1 kHz,  
22 kHz low-pass filter  
Pin 23/pin 25(1)  
Signal to noise ratio  
S/N  
RR  
65  
dB  
dB  
Ripple rejection  
28  
SIF Input Selector Switch  
3
Control voltage:  
- input 1 active  
- input 2 active  
(12)  
2.0  
0
VS  
0.8  
V
V
VSW  
ISW  
Switching current  
±100  
µA  
Notes: 1. This parameter is given as an application information and has not been tested during production.  
2. In VCR mode, the VIF- and SIF path is switched off.  
3. The adjustment of the turn over point (delayed tuner AGC) with the external resistor RTOP or external voltage VTOP is  
possible.  
4. Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 - 10 pF,  
Coil LVCO with unloaded Q-factor Qo 60 for an oscillator voltage 100 mVRMS at pin 20 - 21  
(e.g., TOKO® coil 7 KM, 292 XNS - 4051Z).  
5. The oscillator drift is related to the picture carrier frequency, given that the external LC circuit is temperature-compensated.  
6. α (1.07) = 20 log (4.43 MHz component/1.07 MHz component); α (1.07) value related to black-white signal  
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:  
negatively modulated video-IF signals and FM/NICAM sound signals.  
8. Without a control voltage at pin 19 the falling AFC curve is automatically selected.  
9. With an open circuit at pin 14 the Lswitch is not active.  
10. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;  
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to synchronous peak level).  
11. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; VIN =10 mV  
12. Without a control voltage at pin 3 the SIF input 1 is automatically selected.  
13  
4803C–TVVCR–10/05  
Figure 7-1. Test Circuit  
Intercarrier  
(FM/NICAM)  
AF  
(AM)  
SIF 2  
AFC  
AFC  
switch  
+VS  
Loop  
comp.  
Loop  
filter  
Black  
level  
(1)  
22 µF  
CRef  
150 Ω  
LVCO  
8.2 pF  
10 kΩ  
CVCO  
470 nF  
470 nF  
19  
28  
26  
25  
24  
23  
22  
20  
18  
27  
21  
17  
16  
15  
9
10  
11  
12  
13  
14  
5
7
8
6
1
2
3
4
10 µF  
22 K  
10 kΩ  
2.2 µF  
Video  
neg/pos  
AGC (VIF)  
AGC (SIF)  
SIF  
Input switch  
Tuner  
delay  
L'  
VIF  
SIF 1  
Tuner  
AGC  
Video  
(1)external L/C circuit (VCO 38.9 MHz)  
with TOKO coil 7KM, 292 XNS - 4051Z  
14  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
Figure 7-2. Basic Application Circuit  
(1)External L/C circuit (VCO: 38.9 MHz)  
with TOKO coil 7KM, 292 XNS - 4051Z  
15  
4803C–TVVCR–10/05  
8. Internal Pin Configuration  
Figure 8-1. Sound IF Inputs (Pins 1-2, 27-28)  
1, 27  
2, 28  
2 kΩ  
2 kΩ  
3 V  
20 kΩ  
Figure 8-2. Input Selector Switch (Pin 3)  
3.5 V  
60 kΩ  
10 kΩ  
3
Figure 8-3. SIF-AGC Time Constant (Pin 5)  
5
16  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
Figure 8-4. Video IF Input (Pins 6-7)  
2 k  
2 kΩ  
2.3 V  
4.2 V  
Figure 8-5. VIF-AGC Time Constant (Pin 8)  
8
Figure 8-6. Tuner AGC - Take-over Point (Pin 10)  
3.5 V  
6.5 kΩ  
6 kΩ  
17  
4803C–TVVCR–10/05  
Figure 8-7. Tuner AGC - Output (Pin 11)  
Figure 8-8. Video Output (Pin 12)  
2.6 mA  
Figure 8-9. Standard Switch (Pin 13)  
3.5 V  
17 kΩ  
15.5 kΩ  
13  
23 kΩ  
18  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
Figure 8-10. Black Level Capacitor (Pin 15)  
2.7 V  
5 kΩ  
15  
Figure 8-11. Internal Reference Voltage (Pin 17)  
3.5 V  
Figure 8-12. Loop Filter (Pin 18)  
2.75 V  
19  
4803C–TVVCR–10/05  
Figure 8-13. AFC Switch (Pin 19)  
3.5 V  
30 kΩ  
19  
10.5 kΩ  
Figure 8-14. VCO (Pins 20-21)  
7 kΩ  
7 kΩ  
Figure 8-15. AFC Output (Pin 22)  
20  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
Figure 8-16. Intercarrier Output (Pin 24)  
100 Ω  
24  
1 mA  
Figure 8-17. AF Output AM Sound (Pin 25)  
100 Ω  
25  
1.4 mA  
Figure 8-18. VCO Offset Compensation (Pin 26)  
3.5 V  
10 kΩ  
10 kΩ  
21  
4803C–TVVCR–10/05  
9. Ordering Information  
Extended Type Number  
Package  
Remarks  
Standard Package Quantitiy  
TDA4470-MFLY  
SO28, Pb-free  
SO28, Pb-free  
SSO28, Pb-free  
SSO28, Pb-free  
Delivery in Tubes  
Delivery in taped form  
Delivery in Tubes  
Delivery in taped form  
1,500  
2,000  
3,000  
4,000  
TDA4470-MFLG3Y  
TDA4470-MFSY  
TDA4470-MFSG3Y  
10. Package Information  
9.15  
8.65  
Package SO28  
Dimensions in mm  
18.05  
17.80  
7.5  
7.3  
2.35  
0.25  
0.25  
0.10  
0.4  
10.50  
10.20  
1.27  
16.51  
28  
15  
technical drawings  
according to DIN  
specifications  
1
14  
22  
TDA4470  
4803C–TVVCR–10/05  
TDA4470  
5.7  
5.3  
Package SSO28  
Dimensions in mm  
9.10  
9.01  
4.5  
4.3  
1.30  
0.15  
0.15  
0.05  
0.25  
0.65  
6.6  
6.3  
8.45  
28  
15  
technical drawings  
according to DIN  
specifications  
1
14  
23  
4803C–TVVCR–10/05  
Atmel Corporation  
Atmel Operations  
2325 Orchard Parkway  
San Jose, CA 95131, USA  
Tel: 1(408) 441-0311  
Fax: 1(408) 487-2600  
Memory  
RF/Automotive  
Theresienstrasse 2  
Postfach 3535  
74025 Heilbronn, Germany  
Tel: (49) 71-31-67-0  
Fax: (49) 71-31-67-2340  
2325 Orchard Parkway  
San Jose, CA 95131, USA  
Tel: 1(408) 441-0311  
Fax: 1(408) 436-4314  
Regional Headquarters  
Microcontrollers  
2325 Orchard Parkway  
San Jose, CA 95131, USA  
Tel: 1(408) 441-0311  
Fax: 1(408) 436-4314  
1150 East Cheyenne Mtn. Blvd.  
Colorado Springs, CO 80906, USA  
Tel: 1(719) 576-3300  
Europe  
Atmel Sarl  
Route des Arsenaux 41  
Case Postale 80  
CH-1705 Fribourg  
Switzerland  
Tel: (41) 26-426-5555  
Fax: (41) 26-426-5500  
Fax: 1(719) 540-1759  
Biometrics/Imaging/Hi-Rel MPU/  
High Speed Converters/RF Datacom  
Avenue de Rochepleine  
La Chantrerie  
BP 70602  
44306 Nantes Cedex 3, France  
Tel: (33) 2-40-18-18-18  
Fax: (33) 2-40-18-19-60  
BP 123  
38521 Saint-Egreve Cedex, France  
Tel: (33) 4-76-58-30-00  
Fax: (33) 4-76-58-34-80  
Asia  
Room 1219  
Chinachem Golden Plaza  
77 Mody Road Tsimshatsui  
East Kowloon  
Hong Kong  
Tel: (852) 2721-9778  
Fax: (852) 2722-1369  
ASIC/ASSP/Smart Cards  
Zone Industrielle  
13106 Rousset Cedex, France  
Tel: (33) 4-42-53-60-00  
Fax: (33) 4-42-53-60-01  
1150 East Cheyenne Mtn. Blvd.  
Colorado Springs, CO 80906, USA  
Tel: 1(719) 576-3300  
Japan  
9F, Tonetsu Shinkawa Bldg.  
1-24-8 Shinkawa  
Chuo-ku, Tokyo 104-0033  
Japan  
Tel: (81) 3-3523-3551  
Fax: (81) 3-3523-7581  
Fax: 1(719) 540-1759  
Scottish Enterprise Technology Park  
Maxwell Building  
East Kilbride G75 0QR, Scotland  
Tel: (44) 1355-803-000  
Fax: (44) 1355-242-743  
Literature Requests  
www.atmel.com/literature  
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4803C–TVVCR–10/05  

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