LM1894 Datasheet | Texas Instruments

.ti. SNAS551C - DECEMBER 1994 - REVISED APRIL 2013 LM1894 Dynamic Noise Reduction System DNR Check for Samples: LM1894 Features 1 - 2 Non-plementary Noise Reduction, “Single Ended” - Low Cost External ponents, No Critical Matching - patible with All Prerecorded Tapes and FM - 10 dB Effective Tape Noise Reduction CCIR/ARM Weighted - Wide Supply Range, 4.5V to 18V - 1 Vrms Input Overload DESCRIPTION The LM1894 is a stereo noise reduction circuit for use with audio playback systems. The DNR system is non-plementary, meaning it does not require encoded source material. The system is patible with virtually all prerecorded tapes and FM broadcasts. Psychoacoustic masking, and an adaptive bandwidth scheme allow the DNR to achieve 10 dB of noise reduction. DNR can save circuit board space and cost because of the few additional ponents required. APPLICATIONS - Automotive Radio/Tape Players - pact Portable Tape Players - Quality HI-FI Tape Systems - VCR Playback Noise Reduction - Video Disc Playback Noise Reduction 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. 2 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1994- 2013, Texas Instruments Incorporated SNAS551C - DECEMBER 1994 - REVISED APRIL...