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 Products > Audio Products > Boomer Audio Power Amplifiers <6V,<3W > LM4874

LM4874  Product Folder

2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown
Generic P/N 4874
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
Channels (Channels) 2 
User Supply (Volt) 5 
Supply Range +2.7 - +5.5 V 
PowerAtFourOhms OnePercentTHD (Watt) 1.90 
PowerAtEightOhms OnePercentTHD (Watt) 1.20 
PowerAtFourOhms TenPercentTHD (Watt) 2.60 
PowerAtEightOhms TenPercentTHD (Watt) 1.50 
SNR (dB) 97 
SNR Conditions 62 
PSRR (dB) .30 
PSRR Conditions No 
THD (%)  
THD Conditions  
Audio Mux  

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4874 Boomer ® Audio Power Amplifier Series 2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown 869 Kbytes 7-Aug-02 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
LM4874MHTSSOP EXP PAD20StatusFull productionN/AN/ASamples
Buy Now		1K+$1.00rail
of
73		NSUZXYTT
LM4874
MH
8 weeks0
LM4874MHXTSSOP EXP PAD20StatusFull productionN/AN/A 1K+$1.00reel
of
2500		NSUZXYTT
LM4874
MH
8 weeks0

General Description

The LM4874 features differential stereo inputs, BTL (bridge-tied load) outputs, and four externally selectable fixed gains. Operating on a single 5V supply, the LM4874 delivers 1.2W, 1.9W, or 2.1W (typ) of output power to an 8, 4, or 3 BTL load (Note 1), respectively, with less than 1% THD+N. The LM4874's gain is selected using two digital inputs. The nominal gain values are 6dB, 10dB, 15.6dB, and 21.6dB.

The LM4874 is designed for notebook and other handheld portable applications. It delivers high quality output power from a surface-mount package and requires few external components.

Other features include an active-low micropower shutdown mode input and thermal shutdown protection.

Features

  • Fully differential input and output
  • Internal gain set: 6dB, 10dB, 15.6dB, and 21.6dB
  • Improved "click and pop" suppression
  • Thermal shutdown protection circuit
  • Ultra low current micropower shutdown mode
  • 3.0V to 5.5V operation
  • Available in space-saving exposed-DAP TSSOP package

Key Specification

BTL output power 
RL = 3, VDD = 5.0V, and THD+N = 1%2.1W (typ)
BTL output power 
RL = 4, VDD = 5.0V, and THD+N = 1%1.9W (typ)
BTL output power 
RL = 8, VDD = 5.0V, and THD+N = 1%1.2W (typ)
Micropower shutdown current0.1µA (typ)
PSRR (@ 1kHz, VDD = 5V, (Fig.1))62dB (typ)

Applications

  • Notebook computers
  • PDAs
  • Portable electronic devices

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM4874MHCS06508800006000006169643205
LM4874MHXCS06508800006000006169643205

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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