LM48822, LM48822TLEVAL

www.ti.com

SNAS456C – MAY 2008 – REVISED MAY 2013

LM48822 Boomer ™ Ground-Referenced, Ultra High PSRR, Ultra Low Noise,

Control

Check for Samples: LM48822, LM48822TLEVAL

1

FEATURES

DESCRIPTION

The LM48822 is a single supply, ground-referenced

23

•

Ground Referenced Outputs – Eliminates

stereo headphone amplifier designed for portable

Output Coupling Capacitors

devices, such as cell phones, where board space is

•

Common-Mode Sense

at a premium. The LM48822 features TI’s ground-

•

Ultra-High PSRR

referenced architecture, which eliminates the large

DC

blocking

capacitor

required

by

traditional

•

headphone

amplifiers,

saving

board

space

and

•

High Output Impedance in Shutdown

minimizing system cost.

•

Differential Inputs

The LM48822 features common-mode sensing that

•

Advanced Click-and-Pop Suppression

corrects for any differences between the amplifier

•

Low Supply Current

ground and the potential at the headphone return

terminal, minimizing noise created by any ground

•

Minimum External Components

mismatches.

•

Micro-Power Shutdown

The LM48822 delivers 35mW/channel into a 16

Ω

•

Available in Space-Saving 16-Bump DSBGA

load with <1% THD+N with a 3.6V supply. High

Package

power supply rejection ratio (PSRR), of 110dB at

217Hz, allows the device to operate in noisy

APPLICATIONS

environments

without

additional

power

supply

conditioning. Flexible power supply requirements

•

Mobile Phones

allow operation from 2.4V to 5.5V. The LM48822 has

•

PDAs

a differential inputs for improved noise rejection. High

•

Notebook PCs

output impedance in Shutdown mode, combined with

a charge pump-only mode allows the LM48822's

•

Portable Electronic Devices

outputs to be driven by an external source without

•

MP3 Players

degrading

the

source

signal.

Additionally,

the

KEY SPECIFICATIONS

mute function. The low power Shutdown mode

•

reduces supply current consumption to 0.06µA.

–

Superior click and pop suppression eliminates audible

transients on power-up/down and during shutdown.

•

The LM48822 is available in an ultra-small 16-bump

–

DSBGA package (2mmx2mm).

•

Quiescent Power Supply Current at 3.6V:

3.5mA (typ)

•

PSRR at 217Hz: 110dB (typ)

•

Shutdown Current: 0.06

μA (typ)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

is a trademark of ~ Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2013, 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.