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NTE7047 Integrated Circuit TV Color Small Signal Sub System
Features: D Vision IF Amplifier with Synchronous Demodulator D Automatic Gain Control (AGC) Detector Suitable for Negative Modulation D AGC Tuner D Automatic Frequency Control (AFC) Circuit with Sample-and-Hold D Video Preamplifier D Sound IF Amplifier and Demodulator D DC Volume Control or Separate Supply for Starting the Horizontal Oscillator D Audio Preamplifier D Horizontal Synchronization Circuit with Two Control Loops D Vertical Synchronization (Divider System) and Sawtooth Generation with Automatic Amplitude Adjustment for 50Hz and 60Hz D Transmitter Identification (Mute) D Generation of Sandcastle Pulse Absolute Maximum Ratings: Supply Voltage (Pin7), VP = V7-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2V Total Power Dissipation, Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3W Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25 to +65C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25 to +150C Electrical Characteristics:
Parameter Supplies Supply Voltage Range (Pin7) Supply Current (Pin7) Start Current (Pin11) Start Voltage Horizontal Oscillator Start Protection Level V7-6 I7 I11 V11 V11 I11 = 12mA At no input Note 1 9.5 75 - 9.5 - 12.0 125 6.5 - - 13.2 165 9.0 - 16.5 V mA mA V V
(TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Symbol Test Conditions Min Typ Max Unit
Note 1. Pin11 has a double function. When during switch-on a current of 9mA is supplied to this pin, it is used to start the horizontal oscillator. The main supply can then be obtained from the horizontal deflection stage. When no current is supplied to this pin it can be used as a volume control.
Electrical Characteristics (Cont'd): (TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Parameter Vision IF Amplifier (Pin8 and Pin9) Input Sensitivity (RMS Value) Differential Input Resistance Differential Input Capacitance Gain Control Range Maximum Input Signal Output Signal Expansion for 48dB Variation of Input Signal Video Amplifier (Note 5) Zero Signal Output Level Top Sync Level Video Output Signal Amplitude White-Spot Threshold Level White-Spot Insertion Level Video Output Impedance Internal Bias Current of Output Transistor (NPN Emitter Follower) Maximum Source Current Bandwidth of Demodulated Output Signal Differential Gain Differential Phase Video Non-Linearity Intermodulation I17(int) I17 B G17 j NL Note 8 Note 8 Note 9 f = 1.1MHz (Blue), Note 10 f = 1.1MHz (Yellow), Note 10 f = 3.3MHz (Blue), Note 10 f = 3.3MHz (Yellow), Note 10 Signal-to-Noise Ratio Residual Carrier Signal Residual 2nd Harmonic of Carrier Signal Tuner AGC Minimum Starting Point Tuner Take-Over (RMS Value) Maximum Starting Point Tuner Take-Over (RMS Value) Maximum Tuner AGC Output Swing Output Saturation Voltage Leakage Current (Pin5) Input Signal Variation Complete Tuner Control V8-9(rms) V8-9(rms) I5(max) V5(sat) IL Vi V5 = 3V I5 = 2mA - 100 4 - - 0.5 - 150 - - - 2.0 0.2 - - 300 1 4.0 mV mV mA mV A dB S/N V17 V17 Vi = 10mV, Note 11 End of gain control range, Note 11 V17 V17 V17 Note 7 Note 6 - 2.3 2.3 - - - 1.4 10 5 - - - 50 50 55 55 50 50 - - 50.4 2.5 2.65 5.7 3.8 25 1.8 - 7 4 2 2 60 60 65 65 57 62 2 2 - 2.7 3.0 - - - - - - 8 5 5 - - - - - - 10 10 V V V V V mA mA MHz % deg. % dB dB dB dB dB dB mV mV V8-9 R8-9 C8-9 G8-9 V8-9 V17 Note 4 At 38.9MHz, Note 2 At 45.75MHz, Note 2, Note 26 Note 3 Note 3 25 25 - - - 100 - 40 40 1300 5 77 170 1 60 60 - - - - - V V pF dB mV dB Symbol Test Conditions Min Typ Max Unit
Electrical Characteristics (Cont'd): (TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Parameter Tuner AGC (Cont'd) Minimum Voltage Tuner Take-Over Voltage to Switch on the X-Ray Protection AFC Switch-Off Current Output Current Leakage Current at Pin19 AFC Circuit (AFC Output) AFC Output Voltage Swing Available Output Current Control Steepness AFC Output Voltage with AFC Off AFC Output Resistance Output Voltage Swing Control Steepness Sound Circuit (Note 14) Input Limiting Voltage Input Resistance Input Capacitance AM Suppression AF Output Signal (RMS Value) AF Output Signal when Pin11 is used as a Starting Pin or Connected to VP (RMS Value) AF Output Impedance Total Harmonic Distortion Ripple Rejection Output Voltage When Muted Output Level Shift due to Muting Signal-to-Noise Ratio Voltage with Pin11 Disconnected Current with Pin11 Short Circuited to GND Temperature Dependence of the Output Signal Amplitude Volume Control (Note 18) External Control Resistor Suppression Output Signal during Mute Condition R11 OSS Note 18 - 60 4.7 66 - - k dB V15 R15 C15 AMS V12(rms) V12(rms) Note 15 f = 50kHz Vo(max) = -3dB - - - 53 400 500 400 2.6 6 58 600 900 800 - - - 800 1500 V k pF dB mV mV % dB V V dB V mA dB V18 R18 V18 Note 26 Note 26 V18 I18 Note 12, Note 13 10.5 0.2 - 5.5 - - - - - 100 6.0 40 11 80 11.5 - - 6.5 - - - V mA mV/kHz V k V mV/kHz V1 V1 I19 I19 ILO V19 = 0V Horizontal output high resistance - - 0.1 - - - - - 0.1 - 1 0.8 - 0.3 2 V V mA mA A Symbol Test Conditions Min Typ Max Unit
AFC Circuit (AFC Sample-and-Hold/Switch)
Measured With an Input Signal Amplitude = 150V (RMS value)
Z12 THD RR V12 V12 S/N V11 I11 V12 TA = +20 to +65C, -30dB volume control and voltage of Pin11 fixed, Note 26 Volume control -20dB Note 17 Note 16 Volume control 20dB; fk = 100Hz
- - - - - - - - -
25 0.5 35 2.5 - 47 6.0 1 2.5
100 2.0 - - 0.5 - - - -
Electrical Characteristics (Cont'd): (TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Parameter Required Sync Pulse Amplitude Input Current, Pin25 Symbol V25 I25 Test Conditions Note 19 V25 > 5V V25 = 0V Horizontal Synchronization Circuit (First Control Loop) Holding Range PLL Catching Range PLL IF Input Signal at which the Time Constant is Switched (RMS Value) Control Sensitivity Control Range Controlled Edge Horizontal Synchronization Circuit (Phase Adjustment, via Second Control Loop) Control Sensitivity Maximum Allowed Phase Shift Free Running Frequency Spread with Fixed External Components Frequency Variation Frequency Variation with Temperature Maximum Frequency Deviation at Start of Horizontal Output Frequency Variation when Only Noise is Received Output Limiting Voltage Output Voltage LOW Maximum Sink Current Duty Cycle Output Signal Rise Time of Output Pulse Fall Time of Output pulse Input Current Required During Flyback Pulse Output Voltage During Burst Key Pulse Output Voltage During Horizontal Blanking Output Voltage During Vertical Blanking Pulse Width, Burst Key Pulse Pulse Width, Horizontal Blanking Pulse tr tf I27 V27 V27 V27 tW 60Hz 50Hz ffr f ffr TC ffr ffr Note 26 VP = 9.5 to 13.2V Note 26 R = 34.3k, C = 2.7nF Horizontal Synchronization Circuit (Horizontal Oscillator, Pin23) - - - - - - 15625 - - -1.6 - - - 4 2 - 10 500 Hz % % Hz/C % Hz - - 25 2 - - A/s s f f V8-9 Strong to weak - 600 - 1500 1500 2.2 2000 - - Hz Hz mV Min 200 - - Typ 750 8 -10 Max - - - Unit mV A mA Horizontal Synchronization Circuit (Sync Separator)
Horizontal Synchronization Circuit (Second Control Loop) td/to td Note 21 - - 100 25 positive - - s
Horizontal Synchronization Circuit (Horizontal Output) V26 V26 I26 Isink = 10mA - - 10 - - - 0.1 8 4.0 2.1 2.9 3.2 - 0.2 - 46 260 100 - - 4.4 2.5 3.3 3.6 16.5 0.5 - - - - 2.0 - 5.0 2.9 3.7 4.0 V V mA % ns ns mA V V V s s
Horizontal Synchronization Circuit (Flyback Input and Sandcastle Output, Note 22)
Flyback Pulse Width
Electrical Characteristics (Cont'd): (TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Parameter Vertical Blanking Pulse Symbol Test Conditions 50Hz divider in search window 60Hz divider in search window 50Hz divider in narrow window 60Hz divider in narrow window Delay Between Start of Sync Pulse at the Video Output and the Burst Key Pulse Voltage for Synchronized Condition Voltage for No Signal Condition Switching Level to Switch the Phase Detector from Fast to Slow Hysteresis Slow to Fast Switching Level to Activate the Mute Function (Transmitter Identification) Hysteresis Mute Function Delay Time of Mute Release after Transmitter Insertion Allowable Load on Pin22 External Video Mode Current at Pin22 Input Current During Scan Discharge Current During Retrace Sawtooth Amplitude (peak-to-peak value) Interlace Timing of the Internal Pulses Vertical Circuit (Vertical Output, Note 24) Available Output Current Maximum Output Voltage Input Voltage, DC Component Input Voltage, AC Component (peak-to-peak value) Input Current Internal Precorrection to Sawtooth Deviation Amplitude Temperature Dependence of the Amplitude Vertical Circuit (Vertical Guard, Note 24, Note 25) Active Switching Level at a Deviation with Respect to the DC Feedback Level: Guard Level LOW V4 V27 = 2.5V - 2.1 - V I3 V3 V4 V4(p-p) I4 tp 50Hz/60Hz TA = +20C to +65C V3 = 4V I3 = 0.1mA - 4.4 2.9 - - - - - - 5.0 3.3 1 - 3 - - 3 - 3.7 - 12 - 2 2 mA V V V A % % % V22 I22 I2 I2 V2(p-p) V22 = 0V V22 V22 V22 V22 V22 V22 Trailing edge, 60Hz Rising edge Min - - - - - 4.7 Typ 21 17 25 21 - 5.4 Max - - - - 9.3 6.1 Unit lines lines lines lines s s Horizontal Synchronization Circuit (Cont'd) (Flyback Input and Sandcastle Output, Note 22)
Horizontal Synchronization Circuit (Coincidence Detector) - - 6.2 - 2.5 - - - - - - - - 30 9.8 1.5 6.7 0.6 2.8 2 - - - - - 0.8 1.9 32 - - 7.2 - 3.1 - 300 10 0.7 0.8 2 - - 34 V V V V V V s A V mA A mA V s
Vertical Circuit (Vertical Ramp Generator, Note 24)
Vertical Circuit (Vertical Feedback Input, Note 24)
Electrical Characteristics (Cont'd): (TA = +25C, VP = V7-6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified)
Parameter Active Switching Level at a Deviation with Respect to the DC Feedback Level: Guard Level HIGH Symbol V4 Test Conditions V27 = 2.5V Min - Typ 2.0 Max - Unit V Vertical Circuit (Cont'd) (Vertical Guard, Note 24, Note 25)
On set AGC. The input impedance has been chosen such that a SAW-filter can be applied. Measured with 0dB = 450V. Measured at 10mV (RMS value) top sync input signal. So-called projected zero point; i.e. with switched demodulator. White 10% of the top sync amplitude. The differential gain is expressed as a percentage of the difference in peak amplitude between the largest and smallest value relative to the subcarrier amplitude at blanking level. The differential phase is defined as the difference in degrees between the largest and smallest phase angle. The differential gain and phase are measured with a DSB signal. Note 9. This figure is valid for the complete video signal amplitude (peak white-to-black). The non- linearity is expressed as a percentage of the maximum deviation of a luminance step from the mean step, with respect to the mean step. Note10. The figures are measured at an input signal of 10mV (RMS value). Note 11. Measured with a source impedance of 75. Vout black-to-white Signal-to-noise ratio = 20 log V n(rms) at B = 5MHz Note12. The AFC control voltage is obtained by multiplying the IF output signal (which is also used to drive the synchronous demodulator) with a reference carrier. This reference carrier is obtained from the demodulator tuned circuit via a 90 degree phase shift network. The IF output signal has an asymmetrical frequency spectrum with respect to the carrier frequency. To avoid problems due to this asymmeterical signal the AFC circuit is followed by a sample- and-hold circuit which samples during the sync level. As a result the AFC output voltage contains no video information. The specified control steepness is without using an external load resistor. The control steepness decreases when the AFC output is loaded with two resistors between the voltage supply and GND. Note13. At very weak input signals the drive signal for the AFC circuit will have a high noise content. This noise input has an asymmetrical frequency spectrum which will cause an offset of the AFC output voltage. To avoid problems due to this effect a notch filter can be built in to the demodulator tuned circuit. The characteristics given for waek input signals are measured without a notch circuit, with a SAW filter connected in front of the IC (input signal such that the input signal of the IC is 150V (RMS value). Note14. The sound circuit is measured (unless otherwise specified) with an input signal of V15 of 50mV (RMS value), a carrier frequency of 5.5MHz at a f of 27.5kHz and AF frequency of 1kHz. The QL of the demodulator tuned circuit is 16 and the volume control is connected to the supply. The reference circuit must be tuned in such a way that the output is symmetrical clipping at maximum volume. Note15. The output signal is measured at a f = 7.5kHz and maximum volume control. Note16. The demodulator tuned circuit must be tuned at minimum distortion. Note17. Weighted noise, measured according to: CCIR 468. Note18. See also Note 1. The volume can be controlled by using a potentiometer connected to GND (value 10k) or by means of a variable direct voltage. In the latter case the relatively low input impedance (Pin11) must be taken into account.
Notes: Note 2. Note 3. Note 4. Note 5. Note 6. Note 7. Note 8.
Notes (Cont'd): Note19. The minimum value is obtained with a 1.8k series resistor connected between Pin17 and Pin25. The slicing level can be varied by changing the value of this resistor (a higher resistance results in a larger value of the minimum sync pulse amplitude). The slicing level is independent of the video information. Note20. Frequency control is obtained by supplying a correction current to the oscillator RC-netword. This is achieved via a resistor connected between the phase 1 detector output and the oscillator network. The oscillator can be adjusted to the correct frequency by: S short-circuit the sync separator bias network (Pin25) to the voltage supply. To avoid the necessity of a VCR switch, the time constant of the phase detector at strong input signals is sufficiently short to obtain a stable picture during VCR playback. During the vertical retrace period the time constant is even shorter so that VCR head errors are compensated for at the beginning of the scan. During weak signal conditions (information derived from the AGC circuit) the time constant is increased to obtain a good noise immunity. Note21. This figure is valid for an external load impedance of 82k connected between Pin28 and the shift adjustment potentiometer. Note22. The horizontal flyback input and the sandcastle output have been combined on Pin27. The flyback pulse is clamped to a level of 4.5V. The minimum current to drive the second control loop is 0.1mA. Note23. The in-sync/out-of-sync and transmitter identification have been combined on Pin22. The capacitor is charged during the sync pulse and discharged during the time difference between gating and sync pulsxe. Note24. The vertical scan is synchronized by means of a divider system, therefore no adjustment is required for the ramp generator. The divider detects whether the incoming signal has a vertical frequency of 50Hz or 60Hz and corrects the vertical amplitude. Note25. To avoid screenburn due to a collapse of the vertical deflection, a continuous blanking level is inserted into the sandcastle pulse when the feedback voltage of the vertical deflection is not within the specified limits. Note26. These figures are based on sampled tests.
Pin Connection Diagram
AGC Takeover/X-Ray Protection 1 Vert Ramp Generator 2 Vertical Drive 3 Vertical Feeback 4 Tuner AGC 5 GND 6 VCC 7 Vision IF Input 8 Vision IF Input 9 IF AGC 10 Volume Control/Start Horiz OSC 11 Audio Output 12 Sound Demod 13 Sound IF Decouple 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
Phase 2 Detector Sandcastle Output/Horiz Flyback Input Horizontal Drive Sync Separator Phase 1 Detector Horizontal OSC Coincidence Detector Vision Demod Tuned Ckt Vision Demod Tuned Ckt AFC S/H, AFC Switch AFC Output Video Output GND Sound IF Input
14
1
15
28
1.469 (37.32) Max
.540 (13.7) .250 (6.35)
.100 (2.54) 1.300 (33.02)
.122 (3.1) Min
.600 (15.24)

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