Features Available in space-saving packages: micro SMD, MSOP, SOIC, and LLP Ultra low current shutdown mode BTL output can drive capacitive loads Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions 2.2 - 5.5V operation No output coupling capacitors, snubber networks or bootstrap capacitors required Thermal shutdown protection Unity-gain stable External gain configuration capability Description The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism. The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4890 is unity-gain stable and can be configured by external gain-setting resistors. Key Specification PSRR at 217Hz, VDD = 5V (Fig. 1) 62dB(typ.) Power Output at 5.0V & 1% THD 1W(typ.) Power Output at 3.3V & 1% THD 400mW(typ.) Shutdown Current 0.1µA(typ.) Applications Mobile Phones PDAs Portable electronic devices

Datasheets

Title		Size	Date	Other Language
	LM4890 1 Watt Audio Power Amplifier	1621 Kbytes	26-Jul-06	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4890LDX/NOPB LM4890LDX RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.59 each at 1K+ pcs	reel of 4500
LM4890M/NOPB LM4890M RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 561 AVNET-EM Worldwide 680 DIGI-KEY Worldwide 507 FARNELL Europe and Asia 1230 NEWARK Americas 33 RS COMPONENTS Worldwide 169 TAYLOR Americas 751	$0.59 each at 1K+ pcs	rail of 95
LM4890MM/NOPB LM4890MM RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty AITG Asia Pacific 1001 ARROW Worldwide 2550 DIGI-KEY Worldwide 0 FARNELL Europe and Asia 920 MOUSER Worldwide 971 NEWARK Americas 300 TAYLOR Americas 2550 TECHMOSA Asia Pacific 7000	$0.59 each at 1K+ pcs	reel of 1000
LM4890MMX/NOPB LM4890MMX RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.59 each at 1K+ pcs	reel of 3500
LM4890MX/NOPB LM4890MX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 2500 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 2500 MOUSER Worldwide 2462 TAYLOR Americas 2500	$0.59 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4890IBL	LM4990ITL	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM4890IBLX	LM4890ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890IBP	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890IBPX	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM4890ITL	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890ITP	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890LD	LM4990LD	NATIONAL SEMICONDUCTOR	16 Nov 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 LM4890.

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 LM4890 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
LM4890LDX/NOPB LM4890LDX	27.31 27.404	LLP	10	3 1	260 235	Detail	Download	N/A	ZXYTT L4890
LM4890M/NOPB LM4890M	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM48 90M
LM4890MM/NOPB LM4890MM	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT G90
LM4890MMX/NOPB LM4890MMX	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT G90
LM4890MX/NOPB LM4890MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM48 90M

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 LM4890.

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 LM4890 is located at RoHS Status.

CAD Symbols and Models Download LM4890 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4890LDX	CS065	2	47473	43	0	5527000	1	1568301341
LM4890M	CS065	2	47473	43	0	5527000	1	1568301341
LM4890MM	CS065	2	47473	43	0	5527000	1	1568301341
LM4890MMX	CS065	2	47473	43	0	5527000	1	1568301341
LM4890MX	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 LM4890.

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 LM4890 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4890IBL	LM4990ITL	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM4890IBLX	LM4890ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890IBP	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890IBPX	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM4890ITL	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890ITP	LM4990ITLX	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM4890LD	LM4990LD	NATIONAL SEMICONDUCTOR	16 Nov 2008