Features OCL or capacitively coupled outputs (patent pending) External gain-setting capability Available in space-saving MSOP and LD packages Ultra low current shutdown mode Mute mode allows fast turn-on (1ms) with less than 1mV change on outputs 2V - 5.5V operation Ultra low noise LM4911QMM is an Automotive Grade product that is AE-Q100 grade 2 qualified. Description The LM4911/LM4911Q is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω load or 25mW per channel into a 32Ω load at 1% THD+N from a 3V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4911/LM4911Q does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. In addition, the LM4911/LM4911Q may be configured for either single-ended capacitively coupled outputs or for OCL outputs (patent pending). The LM4911/LM4911Q features a low-power consumption shutdown mode and a power mute mode that allows for faster turn on time with less than 1mV voltage change at outputs on release. Additionally, the LM4911/LM4911Q features an internal thermal shutdown protection mechanism. The LM4911/LM4911Q is unity gain stable and may be configured with external gain-setting resistors. A Q-grade version is available for automotive applications. It is AEC-Q100 grade 2 qualified and packaged in a 10–pin MSOP package (LM4911QMM). Key Specification PSRR at 217Hz and 1kHz 65dB (typ) Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16Ω load 25mW (typ) Output Power at 1kHz with VDD = 3V, 1% THD+N into a 16Ω load 40mW (typ) Shutdown Current 2.0µA (max) Output Voltage change on release from Shutdown VDD = 2.4V, RL = 16Ω (C-Coupled) 1mV (max) Mute Current 100µA (max) Applications Portable CD players PDAs Portable electronics devices Automotive

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

Datasheets

Title		Size	Date	Other Language
	LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output	715 Kbytes	8-Jun-11	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4911MM/NOPB LM4911MM RoHS Status	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 25 DIGI-KEY Worldwide 0 TAYLOR Americas 25	$0.54 each at 1K+ pcs	reel of 1000
LM4911MMX/NOPB LM4911MMX RoHS Status	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.54 each at 1K+ pcs	reel of 3500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4911LD	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4911LDX	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 LM4911.

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 LM4911 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
LM4911MM/NOPB LM4911MM	29.841 30.002	MINI SOIC	10	1 1	260 260	Detail	Download	N/A	ZXTT GA3
LM4911MMX/NOPB LM4911MMX	29.841 30.002	MINI SOIC	10	1 1	260 260	Detail	Download	N/A	ZXTT GA3

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 LM4911.

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 LM4911 is located at RoHS Status.

CAD Symbols and Models Download LM4911 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4911MM	CMOS7	0	21301	0	0	1584000	3	449464325
LM4911MMX	CMOS7	0	21301	0	0	1584000	3	449464325

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 LM4911.

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 LM4911 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4911LD	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4911LDX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009