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

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Datasheet

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

Featured Application Notes

Title		Size	Date	Other Language
	AN-1496: Application Note 1496 Noise, TDMA Noise, and Suppression Techniques	85 Kbytes	28-Apr-08	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1496: Application Note 1496 Noise, TDMA Noise, and Suppression Techniques	85 Kbytes	28-Apr-08	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM4890LDX/NOPB RoHS	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.59 each at 1K+ pcs	reel of 4500
LM4890M/NOPB LM4890M RoHS	SOIC NARROW	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 665 AVNET-EM Worldwide 204 DIGIKEY Worldwide 488 FUTURE Worldwide 565 NEWARK Americas 170 RS COMPONENTS Worldwide 169	$0.59 each at 1K+ pcs	rail of 95
LM4890MX/NOPB RoHS	SOIC NARROW	Full production Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 2500 FUTURE Worldwide 1100	$0.59 each at 1K+ pcs	reel of 2500
LM4890MM/NOPB RoHS	MINI SOIC	Full production Lead Time: 12 weeks	Distributor Region Qty AITG Asia Pacific 1001 ARROW Worldwide 4000 AVNET-EM Worldwide 1000 DIGIKEY Worldwide 736 NEWARK Americas 332 TECHMOSA Asia Pacific 7000	$0.59 each at 1K+ pcs	reel of 1000
LM4890MMX/NOPB RoHS	MINI SOIC	Full production Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.59 each at 1K+ pcs	reel of 3500

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

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4890ITL	CS065	2	38968	52	0	4402000	1	1249079519
LM4890LDX	CS065	2	38968	52	0	4402000	1	1249079519
LM4890M	CS065	2	38968	52	0	4402000	1	1249079519
LM4890MM	CS065	2	38968	52	0	4402000	1	1249079519
LM4890MMX	CS065	2	38968	52	0	4402000	1	1249079519
LM4890MX	CS065	2	38968	52	0	4402000	1	1249079519

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.

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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