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LM4855  Product Folder

Integrated Audio Amplifier System
Generic P/N 4855
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
Channels (Channels) 3 
User Supply (Volt) 5 
Supply Range +2.6 - +5 V 
PowerAtFourOhms OnePercentTHD (Watt) 1.50 
PowerAtEightOhms OnePercentTHD (Watt) 1.10 
PowerAtFourOhms TenPercentTHD (Watt) 1.90 
PowerAtEightOhms TenPercentTHD (Watt) 1.40 
SNR (dB) 100 
SNR Conditions - 
PSRR (dB) 57 
PSRR Conditions 217 Hz, terminated into 50 Ohms 
THD (%) .50 
THD Conditions Pout=.4W @ Vs=5V, RL=8 Ohms, 20Hz-20kHz 
Audio Mux Yes 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4855 Boomer ® Audio Power Amplifier Series Integrated Audio Amplifier System 1116 Kbytes 13-Nov-02 View Online Download Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4855IBLXmicroSMD18StatusFull productionN/AN/A 1K+$1.50reel
of
3000		XYTT
I G55
10-12 weeks100000
LM4855LQLLP24StatusFull productionN/AN/ASamples
Buy Now		1K+$1.50reel
of
1000		NS
UZXYTT
L4855LQ
13-15 weeks10000
LM4855LQXLLP24StatusFull productionN/AN/A 1K+$1.50reel
of
4500		NS
UZXYTT
L4855LQ
10-12 weeks25000
LM4855ITLmicroSMD18StatusFull productionN/AN/ASamples
Buy Now		1K+$1.50reel
of
250		XVG
I A9
10-12 weeks10000
LM4855ITLXmicroSMD18StatusFull productionN/AN/A 1K+$1.50reel
of
3000		XVG
I A9
10-12 weeks250000

General Description

The LM4855 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8 bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per channel of continuous average power into stereo 32 BTL loads with 0.5% THD+N, using a 5V power supply.

The LM4855 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a three-wire SPI serial control interface, that allows flexibility in routing and mixing audio channels.

The LM4855 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only six external components.

The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4855 the most space efficient audio sub system available today.

Features

  • 1.1W (typ) output power with 8 mono BTL load
  • 115mW (typ) output power with stereo 32 BTL loads
  • SPI programmable 32 step digital volume control
  • Eight distinct output modes
  • micro-SMD and LLP surface mount packaging
  • "Click and Pop" suppression circuitry
  • Thermal shutdown protection
  • Low shutdown current (0.1uA, typ)

Key Specification

THD+N at 1kHz, 1.1W into 8 BTL

1.0% (typ)

THD+N at 1kHz, 115mW into 32 BTL

0.5% (typ)

Single Supply Operation

2.6 to 5.0V

Applications

  • Moblie Phones
  • PDAs
[Information as of 15-Jan-2004]

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