NTE1775 Integrated Circuit PIF Subsytem for TV Receiver Description: The NTE1775 is a picture IF subsystem that provides 3–stage IF amplifier, Video Detector, black and white noise inverting circuits and AFT detector for a TV receiver. The NTE1775 also provides internal fast response AGC with dual time constants for the IF amplifier stages and delayed AGC for an external RF amplifier stage. It is designed for FET top front–end (reverse AGC). Features: D High Input Sensitivity 3–Stage IF Amplifier: 58.75MHz 100µVRMS Type D Gain Reduction with Excellent Stability: Reduction Range 65dB Typ D Video Detector with Linear Characteristics D Black and White Noise Inverting Circuits D Balanced AFT Output D Improved Fast AGC Response D Delayed AGC Output for a Front–End FET Top Front–End D Minimal External Components and Adjustments Required Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage (Pin11), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Open Loop Voltage (Pin14), V14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Video DC Output Current (Pin12), I12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6mA Power Dissipation , PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W Derated Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2mW/°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +65°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 10.8 12.0 13.2 V Recommended Supply Voltage VCC Supply Current ICC VCC = 12V 42 51 63 mA Video DC Output Voltage V12 VCC = 12V 5.2 5.5 5.8 V AFT DC Output Voltage V5 VCC = 12V, SW1: ON, SW2: ON 5.3 6.8 8.3 V V6 VCC = 12V, SW1: ON, SW2: ON 5.3 6.8 8.3 V AFC Output Offset Voltage V5–V6 VCC = 12V, SW1: ON, SW2: ON –1.5 0 +1.5 V RF AGC Residual Output Voltage V4 SAT VCC = 12V, SW3: 2, SW4: 1 – – 0.5 V RF AGC Leakage Current I4 LEAK VCC = 12V, SW3: 1, SW4: 1 – – 1.0 µA VCC = 12V, V12 = 0.8VP–P, fp = 58.75MHz, AM: 30% 50 100 220 µVrms Video Sensitivity AGC Range ∆A (IF) VCC = 12V, fp = 58.75MHz, V14 = 11.5V to 4.0V 60 65 – dB Sync Tip Level Voltage VSYNC VCC = 12V, fp = 58.75MHz 2.3 2.5 2.7 V VIN Max VCC = 12V, fp = 58.75MHz 100 120 – mVrms Maximum Input Voltage White Noise, Threshold Level VW TH VCC = 12V, fp = 58.75MHz 6.0 6.4 6.8 V White Noise, Clamp Level VW CL VCC = 12V, fp = 58.75MHz 3.7 4.1 4.5 V Black Noise, Threshold Level VB TH VCC = 12V, fp = 58.75MHz 1.4 1.6 1.8 V Black Noise, Clamp Level VB CL VCC = 12V, fp = 58.75MHz 2.9 3.3 3.7 V Video Frequency Response fBW f = 58.75MHz, Sweep Generator 4.5 5.5 – MHz Carrier Suppression CL SG1 = 100mVrms, SG2, SG3: OFF 40 50 – dB 2nd I2nd SG1 = 100mVrms, SG2, SG3: OFF 40 50 – dB 920kHz Carrier Beat Suppression I920 SG1 = 100mVrms, SG2 = 32mVrms, SG3 = 32mVrms 33 38 – dB Differential Phase DP – 3.5 5.0 deg Differential Gain DG – 7 10 % Input Impedance RIN 3.0 4.5 6.0 kΩ – 2.0 5.0 pF – 16 – kHz/V Carrier Suppression f = 58.75MHz Between Pin1 and Pin16 CIN AFT Sensitivity f = 58.75MHz AFT Output Upper Voltage V5, V6 U f = 58.75MHz 11.7 11.9 12.0 V AFT Output Lower Voltage V5, V6 L f – 58.75MHz 1.8 2.3 2.8 V 0.3 – – mA Maximum Available Current I4 Max Pin Connection Diagram IF Input 1 16 IF Input Coupling Cap 2 15 Coupling Cap RF/AGC Delay 3 14 AGC Filter RF/AGC Output 4 13 GND AFT 1 5 12 Video Output AFT 2 6 11 VCC AFT Tank 7 10 AFT Tank Video Tank 8 9 16 9 1 8 Video Tank .870 (22.0) Max .260 (6.6) Max .200 (5.08) Max .100 (2.54) .700 (17.78) .099 (2.5) Min