Features Eliminates headphone amplifier output coupling capacitors Eliminates half-supply bypass capacitor Advanced pop & click circuitry eliminates noises during turn-on and turn-off Ultra-low current shutdown mode Unity-gain stable 2.2V - 5.5V operation Available in space-saving MSOP, LLP, and SOIC packages Description The LM4910 is an audio power amplifier primarily designed for headphone applications in portable device applications. It is capable of delivering 35mW of continuous average power to a 32Ω load with less than 1% distortion (THD+N) from a 3.3VDC power supply. The LM4910 utilizes a new circuit topology that eliminates output coupling capacitors and half-supply bypass capacitors. The LM4910 contains advanced pop & click circuitry which eliminates noises caused by transients that would otherwise occur during turn-on and turn-off. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4910 does not require any output coupling capacitors, half-supply bypass capacitors, or bootstrap capacitors, it is ideally suited for low-power portable applications where minimal space and power consumption are primary requirements. The LM4910 features a low-power consumption shutdown mode, activated by driving the shutdown pin with logic low. Additionally, the LM4910 features an internal thermal shutdown protection mechanism. The LM4910 is also unity-gain stable and can be configured by external gain-setting resistors. Key Specification PSRR at f = 217Hz 65dB (typ) Power Output at VDD = 3.3V, RL = 32Ω, and THD ≤ 1% 35mW (typ) Shutdown Current 0.1µA (typ) Applications Mobile Phones PDAs Portable electronics devices Portable MP3 players

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

Datasheets

Title		Size	Date	Other Language
	LM4910 LM4910 Output Capacitor-less Stereo 35mW Headphone Amplifier	573 Kbytes	9-Mar-07	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4910LQ/NOPB LM4910LQ RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.43 each at 1K+ pcs	reel of 1000
LM4910LQX/NOPB LM4910LQX RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.43 each at 1K+ pcs	reel of 4500
LM4910MM/NOPB LM4910MM RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1445 AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 0 MOUSER Worldwide 872 TAYLOR Americas 1445	$0.43 each at 1K+ pcs	reel of 1000

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4910MA	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4910MAX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4910MMX	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 LM4910.

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 LM4910 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
LM4910LQ/NOPB LM4910LQ	9.284 9.31	LLP	8	3 1	260 235	Detail	Download	N/A	XTT GA4
LM4910LQX/NOPB LM4910LQX	9.284 9.31	LLP	8	3 1	260 235	Detail	Download	N/A	XTT GA4
LM4910MM/NOPB LM4910MM	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT GC2

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 LM4910.

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 LM4910 is located at RoHS Status.

CAD Symbols and Models Download LM4910 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4910LQ	CMOS7	0	21301	0	0	1584000	3	449464325
LM4910LQX	CMOS7	0	21301	0	0	1584000	3	449464325
LM4910MM	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 LM4910.

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 LM4910 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4910MA	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4910MAX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM4910MMX	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009