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 +65°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25° to +150°C Electrical Characteristics: Parameter (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Symbol Test Conditions Min Typ Max Unit 9.5 12.0 13.2 V Supplies Supply Voltage Range (Pin7) V7–6 Supply Current (Pin7) I7 At no input 75 125 165 mA Start Current (Pin11) I11 Note 1 – 6.5 9.0 mA Start Voltage Horizontal Oscillator V11 9.5 – – V Start Protection Level V11 – – 16.5 V I11 = 12mA 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 = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit At 38.9MHz, Note 2 25 40 60 µV At 45.75MHz, Note 2, Note 26 25 40 60 µV Vision IF Amplifier (Pin8 and Pin9) Input Sensitivity (RMS Value) V8–9 Differential Input Resistance R8–9 Note 3 – 1300 – Ω Differential Input Capacitance C8–9 Note 3 – 5 – pF Gain Control Range G8–9 – 77 – dB Maximum Input Signal V8–9 100 170 – mV Output Signal Expansion for 48dB Variation of Input Signal ∆V17 Note 4 – 1 – dB Zero Signal Output Level V17 Note 6 – 50.4 – V Top Sync Level V17 2.3 2.5 2.7 V Video Output Signal Amplitude V17 2.3 2.65 3.0 V White–Spot Threshold Level – 5.7 – V White–Spot Insertion Level – 3.8 – V Video Output Impedance – 25 – Ω I17(int) 1.4 1.8 – mA Maximum Source Current I17 10 – – mA Bandwidth of Demodulated Output Signal B 5 7 – MHz Video Amplifier (Note 5) Internal Bias Current of Output Transistor (NPN Emitter Follower) Differential Gain Differential Phase Video Non–Linearity G17 Note 8 – 4 8 % j Note 8 – 2 5 deg. NL Note 9 – 2 5 % f = 1.1MHz (Blue), Note 10 50 60 – dB f = 1.1MHz (Yellow), Note 10 50 60 – dB f = 3.3MHz (Blue), Note 10 55 65 – dB f = 3.3MHz (Yellow), Note 10 55 65 – dB Vi = 10mV, Note 11 50 57 – dB End of gain control range, Note 11 50 62 – dB Intermodulation Signal–to–Noise Ratio Note 7 S/N Residual Carrier Signal V17 – 2 10 mV 2nd V17 – 2 10 mV Minimum Starting Point Tuner Take–Over (RMS Value) V8–9(rms) – – 0.2 mV Maximum Starting Point Tuner Take–Over (RMS Value) V8–9(rms) 100 150 – mV Residual Harmonic of Carrier Signal Tuner AGC Maximum Tuner AGC Output Swing I5(max) V5 = 3V 4 – – mA Output Saturation Voltage V5(sat) I5 = 2mA – – 300 mV IL – – 1 µA ∆Vi 0.5 2.0 4.0 dB Leakage Current (Pin5) Input Signal Variation Complete Tuner Control Electrical Characteristics (Cont’d): (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit – – 1 V – – 0.8 V 0.1 – – mA – 0.1 0.3 mA – – 2 µA 10.5 – 11.5 V 0.2 – – mA – 100 – mV/kHz Tuner AGC (Cont’d) Minimum Voltage Tuner Take–Over V1 Voltage to Switch on the X–Ray Protection V1 Horizontal output high resistance AFC Circuit (AFC Sample–and–Hold/Switch) AFC Switch–Off Current I19 Output Current I19 Leakage Current at Pin19 ILO V19 = 0V AFC Circuit (AFC Output) AFC Output Voltage Swing V18 Available Output Current I18 Note 12, Note 13 Control Steepness AFC Output Voltage with AFC Off V18 5.5 6.0 6.5 V AFC Output Resistance R18 – 40 – kΩ Note 26 – 11 – V Note 26 – 80 – mV/kHz Vo(max) = –3dB – 400 800 µV Measured With an Input Signal Amplitude = 150µV (RMS value) Output Voltage Swing V18 Control Steepness Sound Circuit (Note 14) Input Limiting Voltage V15 Input Resistance R15 – 2.6 – kΩ Input Capacitance C15 – 6 – pF AM Suppression AMS 53 58 – dB AF Output Signal (RMS Value) V12(rms) Note 15 400 600 800 mV AF Output Signal when Pin11 is used as a Starting Pin or Connected to VP (RMS Value) V12(rms) ∆f = 50kHz 500 900 1500 mV – 25 100 Ω AF Output Impedance Z12 Total Harmonic Distortion THD Note 16 – 0.5 2.0 % Ripple Rejection RR Volume control 20dB; fk = 100Hz – 35 – dB Output Voltage When Muted V12 – 2.5 – V Output Level Shift due to Muting V12 Volume control –20dB – – 0.5 V Signal–to–Noise Ratio S/N Note 17 – 47 – dB Voltage with Pin11 Disconnected V11 – 6.0 – V Current with Pin11 Short Circuited to GND I11 – 1 – mA Temperature Dependence of the Output Signal Amplitude V12 TA = +20° to +65°C, –30dB volume control and voltage of Pin11 fixed, Note 26 – 2.5 – dB External Control Resistor R11 Note 18 – 4.7 – kΩ Suppression Output Signal during Mute Condition OSS 60 66 – dB Volume Control (Note 18) Electrical Characteristics (Cont’d): (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Horizontal Synchronization Circuit (Sync Separator) Required Sync Pulse Amplitude V25 Note 19 200 750 – mV Input Current, Pin25 I25 V25 > 5V – 8 – µA V25 = 0V – –10 – mA Horizontal Synchronization Circuit (First Control Loop) Holding Range PLL ±∆f – 1500 2000 Hz Catching Range PLL ±∆f 600 1500 – Hz IF Input Signal at which the Time Constant is Switched (RMS Value) V8–9 – 2.2 – mV – 100 – – 25 – µs Strong to weak Horizontal Synchronization Circuit (Second Control Loop) Control Sensitivity Control Range ∆td/∆to Note 21 td Controlled Edge positive Horizontal Synchronization Circuit (Phase Adjustment, via Second Control Loop) Control Sensitivity Maximum Allowed Phase Shift α – 25 – µA/µs – ±2 – µs – 15625 – Hz – – 4 % Horizontal Synchronization Circuit (Horizontal Oscillator, Pin23) Free Running Frequency ffr R = 34.3kΩ, C = 2.7nF Spread with Fixed External Components ∆f Frequency Variation ∆ffr ∆VP = 9.5 to 13.2V – – 2 % Frequency Variation with Temperature TC Note 26 – –1.6 – Hz/°C Maximum Frequency Deviation at Start of Horizontal Output ∆ffr – – 10 % Frequency Variation when Only Noise is Received ∆ffr – – 500 Hz – – 16.5 V – 0.2 0.5 V 10 – – mA – 46 – % Note 26 Horizontal Synchronization Circuit (Horizontal Output) Output Limiting Voltage V26 Output Voltage LOW V26 Maximum Sink Current I26 Isink = 10mA Duty Cycle Output Signal Rise Time of Output Pulse tr – 260 – ns Fall Time of Output pulse tf – 100 – ns Horizontal Synchronization Circuit (Flyback Input and Sandcastle Output, Note 22) Input Current Required During Flyback Pulse I27 0.1 – 2.0 mA Output Voltage During Burst Key Pulse V27 8 – – V Output Voltage During Horizontal Blanking V27 4.0 4.4 5.0 V Output Voltage During Vertical Blanking V27 2.1 2.5 2.9 V Pulse Width, Burst Key Pulse tW 60Hz 2.9 3.3 3.7 µs 50Hz 3.2 3.6 4.0 µs Pulse Width, Horizontal Blanking Pulse Flyback Pulse Width Electrical Characteristics (Cont’d): (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Horizontal Synchronization Circuit (Cont’d) (Flyback Input and Sandcastle Output, Note 22) Vertical Blanking Pulse Delay Between Start of Sync Pulse at the Video Output and the Burst Key Pulse 50Hz divider in search window – 21 – lines 60Hz divider in search window – 17 – lines 50Hz divider in narrow window – 25 – lines 60Hz divider in narrow window – 21 – lines Trailing edge, 60Hz – – 9.3 µs 4.7 5.4 6.1 µs Rising edge Horizontal Synchronization Circuit (Coincidence Detector) Voltage for Synchronized Condition V22 – 9.8 – V Voltage for No Signal Condition V22 – 1.5 – V Switching Level to Switch the Phase Detector from Fast to Slow V22 6.2 6.7 7.2 V Hysteresis Slow to Fast V22 – 0.6 – V Switching Level to Activate the Mute Function (Transmitter Identification) V22 2.5 2.8 3.1 V Hysteresis Mute Function V22 – 2 – V Delay Time of Mute Release after Transmitter Insertion – – 300 µs Allowable Load on Pin22 – – 10 µA – – 0.7 V – – 0.8 mA External Video Mode V22 Current at Pin22 I22 V22 = 0V Vertical Circuit (Vertical Ramp Generator, Note 24) Input Current During Scan I2 – – 2 µA Discharge Current During Retrace I2 – 0.8 – mA Sawtooth Amplitude (peak–to–peak value) V2(p–p) Interlace Timing of the Internal Pulses – 1.9 – V 30 32 34 µs – – 3 mA 4.4 5.0 – V Vertical Circuit (Vertical Output, Note 24) Available Output Current I3 V3 = 4V Maximum Output Voltage V3 I3 = 0.1mA Vertical Circuit (Vertical Feedback Input, Note 24) Input Voltage, DC Component V4 2.9 3.3 3.7 V Input Voltage, AC Component (peak–to–peak value) V4(p–p) – 1 – V Input Current I4 – – 12 µA Internal Precorrection to Sawtooth ∆tp – 3 – % Deviation Amplitude 50Hz/60Hz – – 2 % Temperature Dependence of the Amplitude TA = +20°C to +65°C – – 2 % V27 = 2.5V – 2.1 – V 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 Electrical Characteristics (Cont’d): (TA = +25°C, VP = V7–6 = 12V, carrier 38.9MHz, negative modulation unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit – 2.0 – V Vertical Circuit (Cont’d) (Vertical Guard, Note 24, Note 25) Active Switching Level at a Deviation with Respect to the DC Feedback Level: Guard Level HIGH Notes: Note 2. Note 3. Note 4. Note 5. Note 6. Note 7. Note 8. ∆V4 V27 = 2.5V On set AGC. The input impedance has been chosen such that a SAW–filter can be applied. Measured with 0dB = 450µV. 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 75Ω. 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 150µV (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 10kΩ) or by means of a variable direct voltage. In the latter case the relatively low input impedance (Pin11) must be taken into account. Notes (Cont’d): Note19. The minimum value is obtained with a 1.8kΩ 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 82kΩ 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)