LM4890 - 1 Watt Audio Power Amplifier
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

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

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.)

 

General Description

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. More...


Applications

•Mobile Phones
•PDAs
•Portable electronic devices

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


Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4890 Boomer ® Audio Power Amplifier Series 1 Watt Audio Power Amplifier 1621
Kbytes		 26-Jul-06 Download
LM4890 Boomer ® Audio Power Amplifier Series 1 Watt Audio Power Amplifier (Japanese)
 1338 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM4890LDXLLP10NOPB3260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.59reel
of
4500		ZXYTT
L4890
6 weeksN/A
LM4890MSOIC NARROW8NOPB
STD		1
1		260
235		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.59rail
of
95		NSZXTT
LM48
90M
12 weeks1000
LM4890MXSOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.59reel
of
2500		NSZXTT
LM48
90M
12 weeks5000
LM4890MMMINI SOIC8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.59reel
of
1000		ZXTT
G90
12 weeks7500
LM4890MMXMINI SOIC8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.59reel
of
3500		ZXTT
G90
12 weeks20000

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

General 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.

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.


[Information as of 7-Nov-2009]