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LM4840LQ-LM4840MH-LM4840MHX-LM4840MT Fast Delivery,Good Price
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LM4840LQNSN/a1000avaiStereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840MHNSN/a452avaiStereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840MHXNSN/a481avaiStereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840MTNSN/a29avaiStereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux


LM4840LQ ,Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input MuxGeneral Description Key Specificationsn P at 1% THD+NThe LM4840 is a monolithic integrated circuit ..
LM4840MH ,Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Muxfeatures an externally controlled, low-powerconsumption shutdown mode, and both a power amplifier n ..
LM4840MHX ,Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input MuxBlock Diagram 2LM4840LM4840Absolute Maximum Ratings (Note 10) θ (typ) — LQA028A (Note 3˚C/WJC16)If ..
LM4840MT ,Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input MuxElectrical Characteristics for Volume Attenuators(Notes 7, 10)The following specifications apply fo ..
LM48410SQ , Low EMI, Filterless, 2.3W Stereo Class D Audio Power Amplifier with National 3D Enhancement
LM48410SQX/NOPB ,Low EMI, Filterless, 2.3W Stereo Class D Audio Pwr Amp w/ Natl 3D Enhancement 24-WQFN -40 to 85features high efficiency compared with• Mobile Phonesconventional Class AB amplifiers. When driving ..
LP2981-29DBVR ,100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN
LP2981-30DBVTG4 ,Single Output LDO, 100mA, Fixed(3.0V), Shutdown, 1.25% Tolerance 5-SOT-23 -40 to 125
LP2981-33DBVR ,100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN
LP2981-33DBVTG4 ,Single Output LDO, 100mA, Fixed(3.3V), Shutdown, 1.25% Tolerance 5-SOT-23 -40 to 125
LP2981-50DBVR ,100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN
LP2981A-29DBVR ,100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN


LM4840LQ-LM4840MH-LM4840MHX-LM4840MT
Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux
LM4840
Stereo 2W Audio Power Amplifiers
with Digital Volume Control and Input Mux
General Description

The LM4840isa monolithic integrated circuit that provides
digital volume control and stereo bridged audio power am-
plifiers capableof producing 2W into4Ω (Note1) with less
than 1.0% THDor 2.2W into3Ω (Note2) with less than 1.0%
THD.
Boomer® audio integrated circuits were designed specifically provide high quality audio while requiringa minimum
amountof external components. The LM4840 incorporatesa
digital volume control, stereo bridged audio power amplifiers, input mux, anda last volume level memory functionto
save the volume setting during shutdown. These features
makeit optimally suitedfor multimedia monitors, portable
radios, desktop, and portable computer applications.
The LM4840 featuresan externally controlled, low-power
consumption shutdown mode, and botha power amplifier
and headphone mutefor maximum system flexibility and
performance.
Note1:
When properly mountedtothe circuit board,the LM4840LQand
LM4840MH willdeliver2Winto 4Ω.TheLM4840MTwill deliver 1.1Winto8Ω.
Seethe Application Information section LM4840LQandfor LM4840MHus-
age information.
Note2:
An LM4840LQand LM4840MHthat have been properly mountedto
the circuit boardand forced-air cooledwill deliver 2.2Winto3Ω.
Key Specifications
POat 1% THD+N into3Ω (LM4840LQ, LM4840MH) 2.2W (typ) into4Ω (LM4840LQ, LM4840MH) 2.0W (typ) into8Ω (LM4840) 1.1W (typ) Single-ended mode- THD+Nat 85mW into 32Ω 1.0%
(typ) Shutdown current 0.2μA (typ)
Features
PC98 and PC99 Compliant Digital Volume Control Interface System Beep Detect Stereo switchable bridged/single-ended power amplifiers “Click and pop” suppression circuitry Thermal shutdown protection circuitry Input Mux Capless headphone drivers Last volume memory from shutdown
Applications
Portable and Desktop Computers Multimedia Monitors Portable Radios, PDAs, and Portable TVs
Connection Diagram
LLP Package

DS200104-35
Top View
Order Number LM4840LQ
See NS Package Number LQA028Afor Exposed-DAP LLP

December 2001
LM4840
Stereo
Audio
Power
Amplifiers
with
Digital
olume
Control
and
Input
Mux
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