NJM2259

NJM2259 www.DataSheet4U.com RF Modulator for UHF Band „ DESCRIPTION The NJM2259 is a RF modulator IC especially designed for UHF band RF modulator and consists of video clamp circuit, white clip circuit, video AM modulator and audio FM modulator, built into one chip. NJM2259M „ FEATURES Operating Voltage 5V Picture-to-sound ratio is adjustable Audio ripple is decreased by two internal regulators Audio input circuit with low shock noise Carrier-off switch function on chip Bipolar Technology Package Outline : DMP16 „ PACKAGE OUTLINE „ BLOCK DIAGRAM AUDIO IN VIDEO IN 16 15 14 13 12 11 10 AUDIO SUBCARRIER MODULATOR VIDEO CLAMP REGULATOR LPF WHITE CLIP RF MIXER RF OSCILLATOR REGULATOR 1 GND 3 2 GND 2 3 OSC B1 4 OSC E1 5 OSC E2 6 OSC B2 7 VCC 2 VCC 3 RF OUT P/S Adj. TANK 1 TANK 2 GND 1 VCC 1 9 8 -1- NJM2259 www.DataSheet4U.com „ ABSOLUTE MAXIMUM RATINGS Parameter Symbol Supply Voltage VCC Power Dissipation PD Input Voltage Operating Temperature Range Storage Temperature Range VI Topr Tstg Ratings 7 300 -0.3 to VCC -20 to +75 -40 to +125 (TA=25°C) Unit V mW V °C °C (TA=25°C) Unit V „ RECOMMENDED OPERATING VOLTAGE RANGE Parameter Condition Operating Voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 „ ELECTRICAL CHARACTERISTICS Parameter Condition Symbol Operating Current No video/audio input signal ICC Video Output Level VO Video input Signal (Pin11)=0.5VPP (Note 1) Video Modulation Depth mp Video input Signal (Pin11)=0.5VPP (Note 1...