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TELEFUNKEN Semiconductors
U4460BG
Video IF Amplifier with FPLL Demodulation
Description
The U 4460 BG is an integrated bipolar circuit for video IF (VIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g. B/G standard).
Features
D Active carrier generation by FPLL principle D Tuner AGC with adjustable take over point D 5V supply voltage; low power consumption D Relevant pinning is compatible with the
(frequency-phase-locked-loop) for true synchronous demodulation
D Very linear video demodulation, good pulse
response and excellent intermodulation figures
D VCO is operating on picture carrier frequency D Alignment-free AFC, no external reference circuit D VIF-AGC with peak sync detection Offset comp. (optional) Loop filter
TDA 4474 /71 video-/sound IF combination
Package:
28 pin shrink-dual-inline-plastic (SDIP28)
VCO
FPLL
0 90
VCO + phase shift
AFC
5 VIF
VIF amp
Video det. AGC (VIF)
CAGC
7
11 Take over point
Tuner AGC
Supply
95 9815
Figure 1. Block diagram
Rev. A1: 15.08.1995
Preliminary Information
II I II I II
Tuner 12
II
6
II II I II
23 AFC 13 Video 24 V
S
3,8,17
II I II II II II I II II II
19
27
22
21
AFC 20 switch
II II II II II II II II
18
CRef
1 (9)
U4460BG
Pin description
TELEFUNKEN Semiconductors
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Circuit description
Vision IF amplifier
The video IF signal (VIF) is fed through a SAW filter to the VIF input (Pin 5-6). The VIF amplifier consists of three AC-coupled amplifier stages. Each differential amplifier is gain controlled by the automatic gain control (VIF-AGC). Output signal of the VIF amplifier is applied to the FPLL carrier generation and the video demodulator.
Pin 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
Symbol n.c. n.c. GND n.c. Vi,VIF CAGC GND n.c. n.c. Rtop Itun Vo,vid n.c. n.c. n.c. GND Cref LF n.c. Vvco VAFC Vs n.c. n.c. Rcomp n.c.
Function not connected not connected Ground not connected VIF input (symmetrical) VIF-AGC (time constant) Ground not connected not connected Take over point, tuner AGC Tuner AGC output current Video output not connected not connected not connected Ground Internal reference voltage Loop filter AFC switch VCO circuit AFC output Supply voltage not connected not connected Offset compensation not connected
n.c. n.c. GND n.c. Vi, VIF Vi, VIF CAGC GND n.c.
1 2 3 4 5
28 n.c. 27 Rcomp 26 n.c. 25 n.c. 24 VS
U4460BG
6 7 8 9
23 VAFC 22 VVCO 21 VVCO
20 n.c. 19 LF 18 17 16 15
95 10650
n.c. 10 Rtop Itun VO, vid n.c. 11 12 13 14
CRef GND n.c. n.c.
Figure 2. Pin configuration
demodulated video signal is the criterion for a fast charge/ discharge of the AGC capacitor. The control voltage (AGC voltage at Pin 7) is transferred to an internal control signal and fed to the tuner AGC to generate the tuner AGC current at Pin 12 (open collector output). Take over point of the tuner AGC can be adjusted at Pin 11 by a potentiometer or an external DC voltage (from interface circuit or microprocessor).
VIF-AGC and adjustable tuner AGC
At Pin 7 the VIF-AGC charges/discharges the AGC capacitor to generate a control voltage for setting gain of VIF amplifier and tuner in order to keep the video output signal at a constant level. Therefore the sync level of the 2 (9)
Preliminary Information
Rev. A1: 15.08.1995
TELEFUNKEN Semiconductors FPLL, VCO and AFC
The FPLL circuit (frequency phase locked loop) consists of a frequency and phase detector to generate 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 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 23. A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at Pin 23. At centre frequency the AFC output current is equal to zero. The optional potentiometer at Pin 27 allows an offset compensation of the VCO phase for improved sound quality (fine adjustment). Without a potentiometer (open circuit at Pin 27) 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.
U4460BG
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 (-3dB). The video signal is fed to VIF- AGC and to the video output buffer. This amplifier with 6dB gain offers easy adaption of the sound trap. For nominal video IF modulation the video output signal at Pin 13 is 2 V (peak to peak value).
Internal voltage stabilizer
The internal bandgap reference ensures constant performance independant of supply voltage and temperature.
Absolute maximum values
Reference point pin 3 (8, 17), unless otherwise specified
Parameters Symbol Vs Is P Iout Vext Value 9.0 85 765 5 + 4.5 Unit V mA mW mA V V V V C C V
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Supply voltage Supply current Power dissipation, Vs = + 9 V Output currents External voltages Pin 24 Pin 24 Pin 13 Pin 5, 6, 7, 11, 13, 18, 19, 27 Pin 20,21 Pin 12 Pin 20,23 Junction temperature Storage temperature Electrostatic handling *) all pins Tjunc Tstor VESD + 3.5 + 13.5 Vs +125 -25 to +125 t.b.f. *) Equivalent to discharging a 200 pF capacitor through a 0 resistor
Operating range
Parameters Supply voltage range Ambient temperature Pin25
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Rev. A1: 15.08.1995
Symbol Vs Tamb
Value 4.5 to 9.0 0 to +85
Unit V C
Preliminary Information
3 (9)
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Electrical Characteristics Thermal resistance
Vs = +5V, Tamb = +25C; reference point pin 3 (8, 17), unless otherwise specified
Oscillator drift (free runing) as function of temperature IF input signal for minimum take over point IF input signal for maximum take over point Variation of the take over point by temperature FPLL and VCO: Max. oscillator frequency Vision carrier capture range Parameters DC-supply: Supply voltage Supply current: VIF-input: Input sensitivity, RMS value Input impedance Input capacitance VIF-AGC: IF gain control range AGC capacitor Switching voltage: VCR mode Switching current: VCR mode Tuner-AGC: Available tuner-AGC current Allowable output voltage IF slip - tuner AGC Pins 19, 21, 22, 27 for carrier generation fvco fvco = 38.9 MHz fcap Cvco = 6.8 pF see note 4 f/T Tamb = 55C, Cvco = 6.8 pF, fvco = 38.9 MHz current Itun: 10% to 90% Rtop = 10 k (Vtop= 4.5 V)
U4460BG
4 (9)
Parameters Thermal resistance: junction-ambient when soldered to PCB
Tamb = 55C VIF-AGC: Gv = 46 dB
Rtop = 0 (Vtop = 0.8 V)
see note 2
see note 2
see note 1 see note 1
for FPLL locked
Test Conditions / Pins Pin 24
Preliminary Information
Pins 11, 12 see note 3 Itun 1 Pin 7 Pins 5-6 Symbol Gv CAGC Vsw Symbol Rthja Vout
GIF
Rin Cin
vin
Isw
vin
vin
vin
Vs Is
Min.
1.5
0.3
4.5
70
40
60
TELEFUNKEN Semiconductors
Value 55
Typ.
65 2.2 4.0
1.2 2
5.0 75
50
80
2
2
8
2
Rev. A1: 15.08.1995 Max. -0.3 13.5 10 120 9.0 85 3 4 4 Unit K/W MHz MHz Unit mV mV mA V mA V dB V dB dB F V k pF %
A
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1.
Rev. A1: 15.08.1995 5. 4. 3. 2.
*) External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KN (9 turns, 0.12mm)
Notes:
TELEFUNKEN Semiconductors
AFC output: Control slope Frequency drift by temperature Output vo tage uppe limit voltage upper t lower limit Output current
Parameters Video output: Output cu e t -source current sou ce -sink Output resistance Video output signal Sync level Zero carrier level (neg. modolation) (= ultra white level) Supply voltage influence on the ultra white level Video bandwidth (-3dB) Video frequency response over the AGC range Differential gain error Differential phase error Intermodulation 1.07MHz Video signal to noise ratio Residual vision carrier fundamental wave 38.9 MHz and second harmonic 77.8 MHz Lower limiting level Upper limiting level Ripple rejection
(1.07) = 20 log (4.43 MHz component/1.07 MHz component); (1.07) value related to black-white signal input signal conditions: picture carrier 0 dB colour carrier -6 dB sound carrier -24 dB
Adjustment of turn over point (delayed tuner AGC) with external resistor Rtop or external voltage Vtop possible.
The oscillator drift is related to the picture carrier frequency, at external temperature-compensated LC circuit
In VCR mode" the VIF-and SIF path is switched off.
This parameter is given as an application information and not tested during production.
related to the picture carrier frequency
below sync level above ultra white level pin 24/pin 13; see note 1 Pin 23
see note 5 weighted , CCIR-567
RL 1 k, CL 50 pF
V7 = 3 V
see note 1 peak to peak value
Test Conditions / Pins Pin 13
Preliminary Information
Symbol
Vlim1 Vlim2
Rout vo,vid Vsync VDC
VAFC
IAFC
S/N vres1
V/V
Iout
DG DP
RR
IM
I/f
B
B
Vs-0.4 0.
Min.
1.8
35
52 56
6
2
Typ.
0.7 0.25
400 600
0.2
2.0 1.2 3.4
2 2 60 60 2
8
1
U4460BG
Max.
5 3 100 2.2
0.4
0.6
2.0
10
5 5
A/kHz
MHz dB
%/V
Unit
mA
mV mV dB
% deg dB dB mV
mA
%
V
V V V
5 (9)
U4460BG
+VS Loop comp. LVCO 10 kW n.c. 28 27 n.c. 26 n.c. 25 24 23 22 21 6.8 pF CVCO AFC AFC switch
TELEFUNKEN Semiconductors
Loop filter 150 W 470 nF 20 19
CRef 2.2 mF 18 17 n.c. 16 n.c. 15
U4460BG
1 n.c. 2 n.c. 3 4 n.c. 2.2 mF AGC (VIF) VIF Tuner delay Tuner Video AGC
Figure 3. Test circuit
5
6
7
8
9 n.c.
10 n.c.
11
12
13
14 n.c.
10 kW
Internal Pin Configuration
94 8525
2 kW
2 kW 2.3 V
4.2 V
94 8524
Figure 4. Video IF input (Pin 5-6)
Figure 5. VIF-AGC time constant (Pin 7)
6 (9)
Preliminary Information
Rev. A1: 15.08.1995
95 9642
TELEFUNKEN Semiconductors
U4460BG
3.5 V 6.5 kW 6 kW
94 8526
3.5 V
Figure 6. Tuner AGC - take over point (Pin 11)
94 8531
Figure 9. Internal reference voltage (Pin 18)
94 8527
Figure 7. Tuner AGC - output (Pin 12)
2.75 V
94 8532
Figure 10. Loop filter (Pin 19)
7 kW 2.6 mA
7 kW
94 8528
Figure 8. Video output (Pin 13)
94 8534
Figure 11. VCO (Pin 21-22)
Rev. A1: 15.08.1995
Preliminary Information
7 (9)
U4460BG
94 8538
TELEFUNKEN Semiconductors
3.5 V
10 kW 10 kW
94 8535
Figure 13. VCO offset compensation (Pin 27)
Figure 12. AFC output (Pin 23)
Dimensions in mm
95 10610
Figure 14. 28 pin shrink-dual-inline-plastic (SDIP28)
8 (9)
Preliminary Information
Rev. A1: 15.08.1995
95 10610
TELEFUNKEN Semiconductors
U4460BG
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
Rev. A1: 15.08.1995
Preliminary Information
9 (9)

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