NTE747 Integrated Circuit Low Level Video Detector Description: The NTE747 is a low level video detector in an 8–Lead DIP type package featuring very linear video characteristics and bandwidth. Designed for color and monochrome television receivers, replacing the third IF, detector, video buffer, and the AFC buffer. Features: D Conversion Gain: 34dB Typ D Video Frequency Response @ 6MHz < 1dB D Input of 36mV Produces 3VP–P Output D High Video Output: 7.7VP–P D Fully Balanced Detector D High Rejection of IF Carrier D Low Radiation of Spurious Frequencies Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26mA Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1VRMS Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C Operating Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +75°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Electrical Characteristics: (TA = +25°C, V+ = 20V, Q = 30, fC = 45MHz unless otherwise specified) Parameter Min Typ Max Unit 6 12 20 24 V 5, 6 – 15 – mA Zero Signal DC Output Voltage 4 6.8 7.7 8.3 V Maximum Signal DC Output Voltage 4 – 0 – V Input Signal Voltage 7 – 36 – mVRMS Supply Voltage Range Supply Current Pin Test Conditions 3VP–P Video Output, 90% Modulation Electrical Characteristics: (TA = +25°C, V+ = 20V, Q = 30, fC = 45MHz unless otherwise specified) Parameter Pin Test Conditions Min Typ Max Unit Maximum Output Voltage Swing 4 – 7.7 – VP–P Carrier Rejection at Output 4 42 60 – dB 3VP–P Output, fout = fC – 1 – mVP–P 3VP–P Output, fout = 2fC – 3 – mVP–P Carrier Output Voltage 3dB bandwidth of IF carrier 7 – 80 – MHz 3dB Bandwidth of Video Output 4 – 12.3 – MHz Input Resistance 7 – 3.5 – kΩ Input Capacitance 7 – 3.0 – pF Internal Resistance 2, 3 – 4.4 – kΩ Internal Capacitance 2, 3 – 1.0 – pF – 350 – mVP–P – 6.5 – V AFT Buffer Output 1 AFT Buffer DC Level 1 Across Tuned Circuit At Carrier Frequency, Note 1 Note 1. Measured with 10 times probe. Pin Connection Diagram AFT Buffer 1 8 GND Tuned Circuit 2 7 IF Input Tuned Circuit 3 6 VCC Primary Video Output 4 8 5 Aux Video Output 5 .260 (6.6) 1 4 .300 (7.62) .390 (9.9) Max .155 (3.93) .145 (3.68) .100 (2.54) .300 (7.62)