(Hong Kong)
Product Summary
The LA75694M-TLM is a PAL/NTSC split Support VIF/SIF for Hi-Fi signal-processing IC that makes the minimum numberof adjustments possible. The system is designed so that VCO adjustment makes AFT adjustment unnecessary, thussimplifying the adjustment steps in endproduct manufacturing. PLL detection is adopted in the FM detector, allowingthe LA75694M to support multichannel detection for the audio signal. In addition, it also incorporates a buzz cancellerthat suppresses Nyquist buzz for improved audio quality.
Parametrics
LA75694M-TLM absolute maximum ratings: (1)Maximum supply voltage: VCC max 6V; (2)Circuit voltage: V13, V17 VCCV; (3)Circuit current: I6 -3mA I10 -10mA; (4)Allowable power dissipation: Pd max Ta≤ 50°C, Independent IC420mW Mounted on a board 720mW; (5)Operating temperature: Topr-20 to +70°C; (6)Storage temperatureTstg: -55 to +150°C.
Features
LA75694M-TLM features: (1)Internal AGC; (2)fp = 39MHz to 51MHz continuous wave; 10mVrms; (3)Adjust the SG signal frequency to be higher than fp = 45.75MHz to bring the PLL to unlocked state.Note : The PLL is assumed to be in unlocked state when a beat signal appears at test point A.; (4)When the SG signal frequency is lowered, the PLL is brought to locked state again. ····· f1; (5)Lower the SG signal frequency to bring the PLL to unlock stat; (6)When the SG signal frequency is raised, the PLL is brought to locked state again. ····· f2; (7)Calculate as follows : fpu = f1 – 45.75MHzfpl = f2 – 45.75MHz
Diagrams
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