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 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. 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) Applications Portable and Desktop Computers Multimedia Monitors Portable Radios, PDAs, and Portable TVs

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM4835 Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain	917 Kbytes	10-Feb-03	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4835MTX/NOPB LM4835MTX RoHS Status	TSSOP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.91 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last 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

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4835.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4835 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4835MTX/NOPB LM4835MTX	111.551 112.001	TSSOP	28	3 3	260 235	Detail	Download	N/A	NSUZXYTT LM4835MT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4835.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4835 is located at RoHS Status.

CAD Symbols and Models Download LM4835 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4835MTX	CS065	2	47473	43	0	5527000	1	1568301341

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4835.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4835 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last 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