LM4890   
1 Watt Audio Power Amplifier 		Click link to Download

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% THD1W(typ.)
Power Output at 3.3V & 1% THD 400mW(typ.)
Shutdown Current0.1µA(typ.)

Applications
•Mobile Phones
•PDAs
•Portable electronic devices
MY BRIEFCASE                                     Remove all from My Briefcase 
Click any "Briefcase" icon to add an item

 

ParametersValues
Power@ 8Ohms, 1% THD 1 Watt
Power@ 8Ohms, 10% THD 1.2 Watt
THD 0.1 %
PSRR 62 dB
SNR 105 dB
Channels 1 Channels
Supply Range +2.0 - +5.5 V
THD Conditions Po=.4Wrms@Vs=5
PSRR Conditions f = 1kHz
User Supply 5 Volt
Shutdown Type Low
Temperature Min -40 deg C
Temperature Max 85 deg C

Datasheets
TitleSizeDateOther
Language
LM4890 Boomer ® Audio Power Amplifier Series 1 Watt Audio Power Amplifier1621
Kbytes		26-Jul-06日本語

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM4890LDX/NOPB
LM4890LDX

RoHS Status



LLP		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.59 each at 1K+ pcsreel
of
4500
LM4890M/NOPB
LM4890M

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide665
AVNET-EMWorldwide38
DIGIKEYWorldwide539
FUTUREWorldwide365
NEWARKAmericas635
RS COMPONENTSWorldwide169
$0.59 each at 1K+ pcsrail
of
95
LM4890MM/NOPB
LM4890MM

RoHS Status



MINI SOIC		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AITGAsia Pacific1001
ARROWWorldwide3000
AVNET-EMWorldwide1000
DIGIKEYWorldwide471
NEWARKAmericas259
TECHMOSAAsia Pacific7000
$0.59 each at 1K+ pcsreel
of
1000
LM4890MMX/NOPB
LM4890MMX

RoHS Status



MINI SOIC		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.59 each at 1K+ pcsreel
of
3500
LM4890MX/NOPB
LM4890MX

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide2500
DIGIKEYWorldwide2500
FUTUREWorldwide1100
$0.59 each at 1K+ pcsreel
of
2500

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast 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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LM4890LDX/NOPB
LM4890LDX
LLP103
1		260
235		DetailDownloadN/A
ZXYTT
L4890
LM4890M/NOPB
LM4890M
SOIC NARROW81
1		260
235		DetailDownloadN/A
NSZXTT
LM48
90M
LM4890MM/NOPB
LM4890MM
MINI SOIC81
1		260
260		DetailDownloadN/A
ZXTT
G90
LM4890MMX/NOPB
LM4890MMX
MINI SOIC81
1		260
260		DetailDownloadN/A
ZXTT
G90
LM4890MX/NOPB
LM4890MX
SOIC NARROW81
1		260
235		DetailDownloadN/A
NSZXTT
LM48
90M

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance 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)
LM4890ITLCS065238968520440200011249079519
LM4890LDXCS065238968520440200011249079519
LM4890MCS065238968520440200011249079519
LM4890MMCS065238968520440200011249079519
LM4890MMXCS065238968520440200011249079519
LM4890MXCS065238968520440200011249079519

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast 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

[Information as of 9-Feb-2010]