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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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LM4840 Arkusz danych(PDF) 1 Page - National Semiconductor (TI) |
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LM4840 Arkusz danych(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  LM4840 Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux General Description The LM4840 is a monolithic integrated circuit that provides digital volume control and stereo bridged audio power am- plifiers capable of producing 2W into 4 Ω (Note 1) with less than 1.0% THD or 2.2W into 3 Ω (Note 2) with less than 1.0% THD. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4840 incorporates a digital volume control, stereo bridged audio power amplifiers, an input mux, and a last volume level memory function to save the volume setting during shutdown. These features make it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4840 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance. Note 1: When properly mounted to the circuit board, the LM4840LQ and LM4840MH will deliver 2W into 4 Ω. The LM4840MT will deliver 1.1W into 8Ω. See the Application Information section LM4840LQ and for LM4840MH us- age information. Note 2: An LM4840LQ and LM4840MH that have been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3 Ω. Key Specifications n P O at 1% THD+N n into 3 Ω (LM4840LQ, LM4840MH) 2.2W (typ) n into 4 Ω (LM4840LQ, LM4840MH) 2.0W (typ) n into 8 Ω (LM4840) 1.1W (typ) n Single-ended mode - THD+N at 85mW into 32 Ω 1.0% (typ) n Shutdown current 0.2µA (typ) Features n PC98 and PC99 Compliant n Digital Volume Control Interface n System Beep Detect n Stereo switchable bridged/single-ended power amplifiers n “Click and pop” suppression circuitry n Thermal shutdown protection circuitry n Input Mux n Capless headphone drivers n Last volume memory from shutdown Applications n Portable and Desktop Computers n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Connection Diagram Boomer® is a registered trademark of NationalSemiconductor Corporation. LLP Package DS200104-35 Top View Order Number LM4840LQ See NS Package Number LQA028A for Exposed-DAP LLP December 2001 © 2001 National Semiconductor Corporation DS200104 www.national.com |
Podobny numer części - LM4840 |
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Podobny opis - LM4840 |
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