LM1812 Datasheet | National Semiconductor

LM1812 Ultrasonic Transceiver April 1989 LM1812 Ultrasonic Transceiver General Description The LM1812 is a general purpose ultrasonic transceiver designed for use in a variety of ranging sensing and munications applications The chip contains a pulse-modulated class C transmitter a high gain receiver a pulse modulation detector and noise rejection circuitry A single LC network defines the operating frequency for both the transmitter and receiver The class C transmitter output drives up to 1A (12W) peak at frequencies up to 325 kHz The externally programmed receiver gain provides a detection sensitivity of 200 mVp-p Detection circuitry included on-chip is capable of rejecting impulse...