LM4835 - Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
•PC98 Compliant
•DC Volume Control Interface
•System Beep Detect
•Stereo switchable bridged/single-ended power amplifiers
•Selectable internal/external gain and bass boost configurable
•"Click and pop" suppression circuitry
•Thermal shutdown protection circuitry

Key Specification

PO at 1% THD+N

 

into 3 (LM4835LQ, LM4835MTE)

2.2W (typ)

into 4 (LM4835LQ, LM4835MTE)

2.0W (typ)

into 8 (LM4835)

1.1W (typ)

Single-ended mode - THD+N at 85mW into 32

1.0% (typ)

Shutdown current

0.7µA (typ)

General Description

The LM4835 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 with less than 1.0% THD or 2.2W into 3 with less than 1.0% THD. More...


Applications

•Portable and Desktop Computers
•Multimedia Monitors
•Portable Radios, PDAs, and Portable TVs
  Typical Application
click for larger image


ParametersValues
Power@ 4Ohms, 1% THD 2 Watt
Power@ 8Ohms, 1% THD 1.1 Watt
Power@ 4Ohms, 10% THD 2.5 Watt
Power@ 8Ohms, 10% THD 1.5 Watt
THD 0.3 %
PSRR 74 dB
SNR 93 dB
Channels 2 Channels
Supply Range +2.7 - +5.5 V
THD Conditions Po=1W @Vs=5V, 20Hz-20kHz
PSRR Conditions 120 Hz
SNR Conditions Pout=1.1W
User Supply 5 Volt
Shutdown Type High
Temperature Min -40 deg C
Temperature Max 85 deg C


Typical Performance

click for larger image


  Block Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4835 Boomer ® Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain 917
Kbytes		 10-Feb-03 Download
LM4835 Boomer ® Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain (Japanese)
 420 Kbytes   Download

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


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM4835MTTSSOP28NOPB
STD		3
3		260
235		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.91rail
of
48		NSUZXYTT
LM4835MT
6 weeks500
LM4835MTXTSSOP28NOPB3260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.91reel
of
2500		NSUZXYTT
LM4835MT
8 weeks3000
LM4835MTETSSOP EXP PAD28NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.70rail
of
48		NSUZXYTT
LM4835MTE
12 weeks500
LM4835MTEXTSSOP EXP PAD28NOPB
STD		1
1		260
260		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.70reel
of
2500		NSUZXYTT
LM4835MTE
12 weeks3000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM4835LQ
LM4838MTE
NATIONAL SEMICONDUCTOR
05 Mar 2008
LM4835LQBD
LM4857ITLBD
NATIONAL SEMICONDUCTOR
16 Nov 2008
LM4835LQX
NONE
NATIONAL SEMICONDUCTOR
04 May 2006
LM4835MT
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM4835MTE
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM4835MTEX
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

General Description

The LM4835 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 with less than 1.0% THD or 2.2W into 3 with less than 1.0% THD.

Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4835 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4835 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4835MTCS065238968520440200011249079519
LM4835MTECS065238968520440200011249079519
LM4835MTEXCS065238968520440200011249079519
LM4835MTXCS065238968520440200011249079519

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 8-Nov-2009]