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LM4867  Product Folder

Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function
Generic P/N 4867
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
Channels (Channels) 2 
User Supply (Volt) 5 
Supply Range +2.0 - +5.5 V 
PowerAtFourOhms OnePercentTHD (Watt) 1.90 
PowerAtEightOhms OnePercentTHD (Watt) 1.10 
PowerAtFourOhms TenPercentTHD (Watt) 2.60 
PowerAtEightOhms TenPercentTHD (Watt) 1.50 
SNR (dB) 97 
SNR Conditions RL=8 Ohms, Po=1.1W 
PSRR (dB) 67 
PSRR Conditions Vdd=5V, RL=8 Ohms 
THD (%) .30 
THD Conditions Po=2W @ Vs=5V, R=4 Ohms, Po=1W @ Vs=5V, R=8 Ohms 
Audio Mux Yes 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4867 Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function 763 Kbytes 22-Feb-01 View Online Download Receive via Email
LM4867 Output-Transient-Free Dual 2.1W Audio Amplifier Plus No Coupling Capacitor Stereo Headphone Function (JAPANESE)
 446 Kbytes   View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4867LQLLP24StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$1.44reel
of
1000		NS
UZXYTT
L4867
6-8 weeks20000
LM4867LQXLLP24StatusFull productionN/AN/A 1K+$1.44reel
of
4500		NS
UZXYTT
L4867
6-8 weeks20000
LM4867MTTSSOP20StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$1.38rail
of
73		NSUZXYTT
LM4867
MT
12-14 weeks40000
LM4867MTXTSSOP20StatusFull productionN/AN/A 1K+$1.38reel
of
2500		NSUZXYTT
LM4867
MT
12-14 weeks50000
LM4867MTETSSOP EXP PAD20StatusFull productionN/AN/ASamples
Buy Now 		1K+$1.43rail
of
73		NSUZXYTT
LM4867
MTE
6-8 weeks40000
LM4867MTEXTSSOP EXP PAD20StatusFull productionN/AN/A 1K+$1.43reel
of
2500		NSUZXYTT
LM4867
MTE
8-10 weeks50000

General Description

The LM4867 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4 load or 2.4W to a 3 load with less than 1.0% THD+N. The LM4867 uses advanced, latest generation circuitry to eliminate all traces of clicks and pops when the supply voltage is first applied. The amplifier has a headphone-amplifier-select input pin. It is used to switch the amplifiers from bridge to single-ended mode for driving headphones. A new circuit topology eliminates headphone output coupling capacitors. A MUX control pin allows selection between the two sets of stereo input signals. The MUX control can also be used to select between two different customer-specified closed-loop responses.

Boomer audio power amplifiers are designed specifically to provide high quality output power from a surface mount package and require few external components. To simplify audio system design, the LM4867 combines dual bridge speaker amplifiers and stereo headphone amplifiers in one package.

The LM4867 features an externally controlled power-saving micropower shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection.

Features

  • Advanced "click and pop" suppression circuitry
  • Eliminates headphone amplifier output coupling capacitors
  • Stereo headphone amplifier mode
  • Input mux control and two separate inputs per channel
  • Thermal shutdown protection circuitry
  • LLP, TSSOP, and exposed-DAP TSSOP packaging available

Key Specification

PO at 1% THD+N

  

LM4867LQ, 3 load

2.4W (typ)

LM4867LQ, 4 load

2.1W (typ)

LM4867MTE, 4

1.9W (typ)

LM4867MT, 8

1.1W (typ)

Single-ended mode - THD+N at 75mW into 32

0.5% (max)

Shutdown current

0.7µA (typ)

Applications

  • Multimedia monitors
  • Portable and desktop computers
  • Portable audio systems
[Information as of 15-Jan-2004]

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