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| NTE791 Integrated Circuit TV Chroma Amplifier Demodulator Description: Compromised of an independent 2-stage chroma amplifier, chroma demodulators, resistor matrix, and color difference amplifiers. The NTE791 monolithic silicon integrated circuit is one of two blocks required for a complete color television receiver chroma system. The chroma amplifiers contain the necessary circuitry for automatic chroma control and color-killer sensing and control. The demodulators and resistor matrix reconstruct the G-Y color chain to bypass unwanted harmonics. The high-level emitter follower outputs are current limited for short-circuit protection. Features: D DC Chroma Gain Control D Improved Filtering for Harmonic Reduction D Output Short-Circuit Current Limiting D Self-Contained Bias Regulator D Low Thermal Drift, Typically 1mV/C D Doubly Balanced Demodulation Absolute Maximum Ratings: Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +85C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Maximum Voltage and Current Ratings (TA = +25C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Table Current in mA Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Voltage Range in Volts 0 to +16 - 0 to VCC - reference 0 to VCC 0 to +15 0 to +15 0 to VCC 0 to VCC 0 to VCC 0 to +30 0 to +10 0 to VCC 0 to +16 0 to +16 Input - 2.0 1.0 2.0 1.0 - - - 0 0 0 50 - - - - Output - - 10 - 50 - - - Note 1 Note 1 Note 1 1.0 - - - - Note 1. Maximum continuous current output is 20mA and is limited by package power dissipation. Short circuit current is typically 50mA. Static Electrical Characteristics: (TA = +25C, VCC = 24V, Note 2 unless otherwise specified) Parameter Supply Current Input D-C Voltage Chroma Demod R-Y Inj. B-Y Inj. Amplifier No. 1 Amplifier No. 2 Output DC Voltage Amplifier No. 1 Pins 12 13 8 7 2 4 3 V1 = V14 (ACC at 1/2 Max. Gain) V1 - V14 = 100mV (ACC Max Gain) V14 -V1 = 100mV (ACC Min Gain) Demodulator Output Differential Voltage for any two outputs Output Tracking Temperature Coefficient Amplifier No. 1 Sensitivity Amplifier No. 2 Sensitivity Relative Output Voltage R-Y Relative Output Voltage G-Y Demodulator A-C Unbalanced 90% Gain 10% Gain Killer 9,10,11 Reference Injection = 1Vpp 9,10,11 Reference Injection = 1Vpp 9,10,11 2 4 10 9 11 11 11 B-Y = 2 Vrms B-Y = 2 Vrms B-Y = 2 Vrms B-Y = 2 Vrms V6 = 3V V6 = 21V V1 - V14 = 100mV Adj to Kill V1 - V14 = 85mV Output Must Recover Test Conditions Min - - - - - - - - - Typ 40 5.5 6.1 6.1 1.6 1.6 18 13 23 Max 50 - - - - - - - - Unit mA V V V V V V V V V mV mV/C mVrms mVrms Vrms mVrms mVrms Vrms Vrms mVrms 13.3 14.3 15.3 - - 6.3 35 1.4 300 - - - - 2.5 200 -1.0 10 50 400 - 1.8 0.2 - - 600 - 15 80 500 200 - - 500 - 1.52 1.68 9,10,11 Chroma Input = 0 Note 2. ACC inputs biased from 11V thru 62k Note 3. B-Y Reference Injection = 1Vpp < 106C Pin Connection Diagram ACC Input 1 1st Amp Input 2 1st Amp Output 3 2nd Amp Input 4 GND 5 Chroma Gain Control 6 Reference Input 7 Reference Input 8 16 ACC INput 15 Killer Adjust 14 2nd Amp Output 13 Demod Chroma Input 12 VCC 11 B - Y Output 10 R - Y Output 9 G - Y Output 16 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7) |
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