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 +85°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Maximum Voltage and Current Ratings (TA = +25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 Output – 2.0 1.0 2.0 1.0 – – – 0 0 0 50 – – – – – – 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 = +25°C, VCC = 24V, Note 2 unless otherwise specified) Parameter Pins Test Conditions Min Typ Max Unit Supply Current 12 – 40 50 mA Input D–C Voltage Chroma Demod 13 – 5.5 – V R–Y Inj. 8 – 6.1 – V B–Y Inj. 7 – 6.1 – V Amplifier No. 1 2 – 1.6 – V Amplifier No. 2 4 – 1.6 – V Output DC Voltage Amplifier No. 1 3 V1 = V14 (ACC at 1/2 Max. Gain) – 18 – V V1 – V14 = 100mV (ACC Max Gain) – 13 – V V14 –V1 = 100mV (ACC Min Gain) – 23 – V Demodulator 9,10,11 Reference Injection = 1Vpp 13.3 14.3 15.3 V Output Differential Voltage for any two outputs 9,10,11 Reference Injection = 1Vpp – 200 600 mV Output Tracking Temperature Coefficient 9,10,11 – –1.0 – mV/°C Amplifier No. 1 Sensitivity 2 B–Y = 2 Vrms 6.3 10 15 mVrms Amplifier No. 2 Sensitivity 4 B–Y = 2 Vrms 35 50 80 mVrms Relative Output Voltage R–Y 10 B–Y = 2 Vrms 1.4 1.52 1.68 Relative Output Voltage G–Y 9 B–Y = 2 Vrms 300 400 500 mVrms – – 200 mVrms Demodulator A–C Unbalanced 9,10,11 Chroma Input = 0 Vrms 90% Gain 11 V6 = 3V – 1.8 – Vrms 10% Gain 11 V6 = 21V – 0.2 – Vrms Killer 11 V1 – V14 = 100mV Adj to Kill – – 500 mVrms 2.5 – – V1 – V14 = 85mV Output Must Recover Note 2. ACC inputs biased from 11V thru 62kΩ Note 3. B–Y Reference Injection = 1Vpp < 106°C Pin Connection Diagram ACC Input 1 16 ACC INput 1st Amp Input 2 1st Amp Output 3 15 Killer Adjust 14 2nd Amp Output 2nd Amp Input 4 13 Demod Chroma Input GND 5 12 VCC Chroma Gain Control 6 11 B – Y Output Reference Input 7 10 R – Y Output Reference Input 8 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)