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LM48821

Texas Instruments
Part Number LM48821
Manufacturer Texas Instruments
Description 52mW Differential Input Stereo Headphone Amplifier
Published Sep 9, 2020
Detailed Description LM48821, LM48821TLEVAL www.ti.com SNAS354A – JUNE 2007 – REVISED MAY 2013 LM48821 Direct Coupled, Ultra Low Noise, 5...
Datasheet PDF File LM48821 PDF File

LM48821
LM48821

Overview
LM48821, LM48821TLEVAL www.
ti.
com SNAS354A – JUNE 2007 – REVISED MAY 2013 LM48821 Direct Coupled, Ultra Low Noise, 52mW Differential Input Stereo Headphone Amplifier with I2C Volume Control Check for Samples: LM48821, LM48821TLEVAL FEATURES 1 •2 Ground Referenced Outputs • Differential Inputs • I2C Volume and Mode Controls • Available in Space-Saving DSBGA Package • Ultra Low Current Shutdown Mode • Advanced Output Transient Suppression Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions • 2.
0V to 4.
0V Operation (PVDD and SVDD) • 1.
8 to 4.
0V Operation (I2CVDD) • No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors, or GainSetting Resistors Required APPLICATIONS • Notebook PCs • Desktop PCs • Mobile Phones • PDAs • Portable Electronic Devices • MP3 Players KEY SPECIFICATIONS • Improved PSRR at 217Hz: 82dB (typ) • Stereo Output Power at VDD = 3V, RL = 16Ω, THD+N = 1%: 52mW (typ) • Mono Output Power at VDD = 3V, RL = 16Ω, THD+N = 1%: 93mW (typ) • Shutdown current: 0.
1μA (typ) DESCRIPTION With its directly-coupled output technology, the LM48821 is a variable gain audio power amplifier capable of delivering 52mWRMS per channel into a 16Ω single-ended load with less than 1% THD+N from a 3V power supply.
The I2C volume control has a range of –76dB to 18dB.
The LM48821's Tru-GND technology utilizes advanced charge pump technology to generate the LM48821’s negative supply voltage.
This eliminates the need for output-coupling capacitors typically used with single-ended loads.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components.
The LM48821 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 LM48821 incorporates selectable low-power consumption shutdown and channel select modes.
The LM48821...


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