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PRELIMINARY SPECIFICATION Microsemi INTEGRATED PRODUCTS 5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 Page 1 Copyright 2001 Rev. 0.3,2002-05-08 LX1792 Low Voltage, Low Power, AudioMite™ Class-D Audio Amplifier INTEGRA T ED P R OD UCT S DESCRI PTION DESCRI PTION DESCRI PTION DESCRI PTION The MSC-LX1792 offers a patent pending, low voltage, low power, and high efficiency amplifier for driving a high impedance speaker such as a hearing aid receiver. The core of the amplifier is built upon Microsemi’s patented LX1790 class D amplifier. The LX1790 consists of a preamplifier followed by a fixed gain class D amplifier. The input resistor and feedback resistor is external in the LX1792 making it possible to set the gain arbitrarily, up to approximately 40dB. The feedback resistor can also be potentiometer to facilitate volume control. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com KEY FEATU R ES KEY FEATU R ES KEY FEATU R ES KEY FEATU R ES ! Low Operating Current: 120µA Typical ! Low Operating Voltage: 0.9V minimum ! Gain set by external resistors ! 3 Output Switch Resistance Settings: 48, 24 & 16 Ω ! 5uVrms input referred noise. APP L ICAT IONS APP L ICAT IONS APP L ICAT IONS APP L ICAT IONS ! Hearing Aid applications ! High impedance speaker /Transducer applications PRODUCT H I GHL IG HT PRODUCT H I GHL IG HT PRODUCT H I GHL IG HT PRODUCT H I GHL IG HT SPEAKER D IN CLOCK PRE AMP CMP HBRIDGE ΣΣΣΣ PACKAGE OR DER I N FO PACKAGE OR DER I N FO PACKAGE OR DER I N FO PACKAGE OR DER I N FO TJ ( °°°°C) J Ceramic Dip 14-Pin LM Plastic MLPM 8-Pin DU Plastic MSOP 8-Pin BD Bare Die 10 to 55 LX1792CJ LX1792CLM LX1792CDU LX1792BD |
