LM4911, LM4911Q

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SNAS152M – MAY 2004 – REVISED JUNE 2011

LM4911/LM4911Q

Stereo 40mW Low Noise Headphone

Amplifier with Selectable Capacitive Coupled or OCL Output

Check for Samples: LM4911, LM4911Q

1

FEATURES

KEY SPECIFICATIONS

2

•

OCL or Capacitively Coupled Outputs (Patent

•

PSRR at 217Hz and 1kHz 65 dB (typ)

Pending)

•

•

External Gain-Setting Capability

1% THD+N into a 16

Ω Load 25 mW (typ)

•

Available in Space-Saving VSSOP and WSON

•

Packages

1% THD+N into a 16

Ω Load 40 mW (typ)

•

Ultra Low Current Shutdown Mode

•

Shutdown Current 2.0 µA (max)

•

Mute Mode Allows Fast Turn-on (1ms) with

•

Output Voltage Change on Release from

Less Than 1mV Change on Outputs

mV (max)

•

2V - 5.5V Operation

•

Mute Current 100 µA (max)

•

Ultra Low Noise

•

LM4911QMM is an Automotive Grade Product

DESCRIPTION

that is AEC-Q100 Grade 2 Qualified.

The LM4911/LM4911Q is an stereo audio power

amplifier capable of delivering 40mW per channel of

APPLICATIONS

continuous average power into a 16

Ω load or 25mW

•

Portable CD Players

per channel into a 32

Ω load at 1% THD+N from a 3V

power supply.

•

PDAs

•

Portable Electronics Devices

Boomer

audio

power

amplifiers

were

designed

specifically to provide high quality output power with a

•

Automotive

minimal amount of external components. Since the

LM4911/LM4911Q

does

not

require

bootstrap

capacitors or snubber networks, it is optimally suited

for low-power portable systems. In addition, the

LM4911/LM4911Q may be configured for either

single-ended capacitively coupled outputs or for OCL

outputs (patent pending).

Block Diagram

Figure 1. Block Diagram

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.