Features 56W continuous average output power into 8 100W instantaneous peak output power capability Signal-to-Noise Ratio >95dB (min) Output protection from a short to ground or to the supplies via internal current limiting circuitry Output over-voltage protection against transients from inductive loads Supply under-voltage protection, not allowing internal biasing to occur when |V+| + |V-| <= 12V, thus eliminating turn-on and turn-off transients 11 lead TO-220 package Wide supply voltage range: |V+| + |V-| = 20V to 84V Description The LM3875 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8 load with 0.1% THD+N from 20Hz to 20kHz. The performance of the LM3875, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, caused by shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3875 maintains an excellent signal-to-noise ratio of greater than 95dB(min) with a typical low noise floor of 2.0µV. It exhibits extremely low THD+N values of 0.06% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%. Applications Component or compact stereos Self-powered speakers Surround-sound amplifiers High-end stereo TVs

Also Recommended LM4780 Dual Amplifier, Improved SNR

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance *click for larger image

Datasheets

Title		Size	Date	Other Language
	LM3875 High-Performance 56W Audio Power Amplifier	1006 Kbytes	10-Nov-04	日本語

Application Notes

Title		Size	Date	Other Language
	AN-898: Application Note 898 Audio Amplifiers Utilizing: SPiKe Protection	1412 Kbytes	20-Sep-02	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM3875TF/NOPB LM3875TF RoHS Status	ISOLATED TO220	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 140 DIGI-KEY Worldwide 110 FARNELL Europe and Asia 384 MOUSER Worldwide 94 NEWARK Americas 27	$3.10 each at 1K+ pcs	rail of 20

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM3875T	LM3886T	NATIONAL SEMICONDUCTOR	05 Mar 2008

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 LM3875.

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 LM3875 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
LM3875TF/NOPB LM3875TF	5995.061 6000.012	ISOLATED TO220	11	1 1	NA NA	Detail	N/A	N/A	NSUZXYTTE# LM3875TF

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 LM3875.

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 LM3875 is located at RoHS Status.

Design Tools

Title	Size	Date
Amplifiers Selection Guide software for Windows

CAD Symbols and Models N/A

Models N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM3875T	LM3886T	NATIONAL SEMICONDUCTOR	05 Mar 2008