LA1136N

Ordering number: EN 3507 Monolithic Linear IC LA1136N, 1136NM, 1137N, 1137NM AM Tuners for Car Radios and Home Stereos Overview The LA1136N/NM and LA1137N/NM are high-performance AM electronic tuner ICs offering sophisticated functions. They are especially suited for use in car radio and home stereo (antenna: loop) applications. Functions . MIX . OSC (with ALC) . IF amplifier . Detector . AGC (normal) . RF wide-band AGC . Auto search stop signal (Signal meter output) . Local oscillation buffer output . IF band switching circuit (for LA1136N only) . IF count buffer . Stop detector output (can be set independently) . Tweet prevention circuit . AGC (RF, IF) time constant switching circuit . IF AGC circuit . Pin-diode driver . AM stereo decoder IF output (for LA1136N only) . Circuit preventing incorrect seek operation Features . Excellent cross modulation characteristic: Meets the requirements for preventing not only adjacent-channel interference but also interference caused by all channels . within broadcast band. Narrow-band signal meter output: Usable as auto search stop . signal. Has linearity up to 100 dBµ. Local oscillation buffer output: Facilitates designing of . electronic tuner system, frequency display, etc. OSC (with ALC): Improves tracking error because oscillation output is stabilized at a low level (350 mVrms: . LA1137N) for varactor diode. MIX: Double-balanced differential MIX meeting the requirements for preventing spurious interference, IF . interference. Goo...