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LM4840

Features: PC98 and PC99 CompliantDigital Volume Control InterfaceSystem Beep DetectStereo switchable bridged/single-ended power amplifiers Click and pop suppression circuitryThermal shutdown protection circuitryInput MuxCapless headphone driversLast volume memory from shutdownApplicationPortable ...

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SeekIC No. : 004395794 Detail

LM4840: Features: PC98 and PC99 CompliantDigital Volume Control InterfaceSystem Beep DetectStereo switchable bridged/single-ended power amplifiers Click and pop suppression circuitryThermal shutdown protec...

LM4840 Data Sheet

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Part Number:
LM4840
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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




Application

Portable and Desktop Computers
Multimedia Monitors
Portable Radios, PDAs, and Portable TVs




Pinout

Connection Diagram




Specifications

Power@ 4Ohms, 1% THD 2 Watt
Power@ 8Ohms, 1% THD 1 Watt
Power@ 8Ohms, 10% THD 1.5 Watt
THD 0.3 %
PSRR 74 dB
SNR 93 dB
Channels 2 Channels
Supply Range +2.7 - +5.5 V
THD Conditions p=1w,20-20khz,rl=8avd=2
PSRR Conditions cb=1uf,f=120hz,vripple=200mvrms,rl=8
SNR Conditions Vdd=5v,pot=1.1w,rl=8, A-weighted
User Supply 5 Volt
Shutdown Type High
Temperature Min -40 deg C
Temperature Max 85 deg C
AEC Q-100 Automotive Grade 0
View Using Catalog


Supply Voltage.......................................................................... 6.0V
Storage Temperature ...........................................-.65°C to +150°C
Input Voltage ....................................................−0.3V to VDD +0.3V
Power Dissipation (Note 11).................................. Internally limited
ESD Susceptibility (Note 12)................................................... 2000V
ESD Susceptibility (Note 13)..................................................... 200V
Junction Temperature .............................................................150°C
Soldering Information
Small Outline Package
Vapor Phase (60 sec.) .........................................................215°C
Infrared (15 sec.) .................................................................220°C
See AN-450 "Surface Mounting and their Effects on
Product Reliability" for other methods of soldering surface mount devices.
JC (typ)-LQA028AA .............................................................3°C/W
JA (typ)-LQA028AA ...........................................................42°C/W
JC (typ)-MTC28 .................................................................20°C/W
JA (typ)-MTC28................................................................. 80°C/W
JC (typ)-MXA28A .................................................................2°C/W
JA (typ)-MXA28A (exposed DAP) (Note 4)..........................41°C/W
JA (typ)-MXA28A (exposed DAP) (Note 3)..........................54°C/W
JA (typ)-MXA28A (exposed DAP) (Note 5)..........................59°C/W
JA (typ)-MXA28A (exposed DAP) (Note 6)..........................93°C/W
JA (typ)-ITL36AAA ...........................................................100°C/W
JC (typ)-ITL36AAA (Note 16) .............................................65°C/W
JA (typ)-GRA49A.............................................................. 100°C/W
JC (typ)-GRA49A (Note 17) ...............................................54°C/W




Description

The LM4840 is a monolithic integrated circuit that provides digital volume control and stereo bridged audio power amplifiers capable of producing 2W into 4W (Note 1) with less than 1.0% THD or 2.2W into 3W (Note 2) with less than 1.0% THD.

Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4840 incorporates a digital volume control, stereo bridged audio power amplifiers, an input mux, and a last volume level memory function to save the volume setting during shutdown. These features make it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4840 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.






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