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LM4898LD Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4898LD Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 17 page  LM4898 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select General Description The LM4898 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applica- tions. It is capable of delivering 1 watt of continuous average power to an 8 Ω BTL load with less than 1% distortion (THD+N) from a 5V DC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4898 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage appli- cations where minimal power consumption is a primary re- quirement. The LM4898 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown select pin to be driven in a likewise manner to enable Shut- down. Additionally, the LM4898 features an internal thermal shutdown protection mechanism. The LM4898 contains advanced pop & click circuitry which virtually eliminates noises which would otherwise occur dur- ing turn-on and turn-off transitions. Key Specifications j Improved PSRR at 217Hz 83dB(typ) j Power Output at 5.0V & 1% THD 1.0W(typ) j Power Output at 3.3V & 1% THD 400mW(typ) j Shutdown Current 0.1µA(typ) Features n Fully differential amplification n Available in space-saving packages micro SMD, MSOP, and LLP n Ultra low current shutdown mode n Can drive capacitive loads up to 500pF n Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions n 2.4 - 5.5V operation n No output coupling capacitors, snubber networks or bootstrap capacitors required n Shutdown high or low selectivity Applications n Mobile phones n PDAs n Portable electronic devices Connection Diagrams Mini Small Outline (MSOP) Package MSOP Marking 20073723 Top View Order Number LM4898MM See NS Package Number MUB10A 20073774 Z -Assembly Code X - Date Code TT - Die Run Traceability G - Boomer Family B3 - LM4898MM Boomer® is a registered trademark of National Semiconductor Corporation. July 2003 © 2003 National Semiconductor Corporation DS200737 www.national.com |
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