Part # LM4895 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4895 Boomer ® Audio Power Amplifier Series 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed


Part Details:

Gain LM4895 October 2002 1 LM4895 Watt 1 Watt Fully Differential Audio Power Amplifier WithShutdown Select and Fixed 6dB Gain Fully General Description Key Specifications The LM4895 is a fully differential audio power amplifier Differential j Improved PSRR at 217Hz 80dB primarily designed for demanding applications in mobilephones and other portable communication device applica- j Power Output at 5.0V & 1% THD 1.0W(typ.) tions. It is capable of delivering 1 watt of continuous average j Power Output at 3.3V & 1% THD 400mW(typ.) power to an 8 load with less than 1% distortion (THD+N) j Shutdown Current 0.1µA(typ.) from a 5V power supply. DC Boomer audio power amplifiers were designed specifically toprovide high quality output power with a minimal amount of Features external components. The LM4895 does not require output Audio n Fully differential amplification coupling capacitors or bootstrap capacitors, and therefore is n Internal-gain-setting resistors ideally suited for mobile phone and other low voltage appli- n Available in space-saving packages micro SMD, MSOP cations where minimal power consumption is a primary re- and LLP quirement. n Ultra low current shutdown mode Power The LM4895 features a low-power consumption shutdown n Can drive capacitive loads up to 500 pF mode. To facilitate this, Shutdown may be enabled by either n Improved pop & click circuitry eliminates noises during logic high or low depending on mode selection. Driving the turn-on and turn-off transitions shutdown mode pin either high or low enables the shutdownselect pin to be driven in a likewise manner to enable Shut- n 2.2 - 5.5V operation Amplifier down. Additionally, the LM4895 features an internal thermal n No output coupling capacitors, snubber networks or shutdown protection mechanism. bootstrap capacitors required The LM4895 contains advanced pop & click circuitry which n Shutdown high or low selectivity


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LM4895.pdf Datasheet