下载
LM48861, LM48861TMBD
www.ti.com
SNAS450B –JUNE 2008–REVISED MAY 2013
LM48861 Ground-Referenced, Ultra Low Noise, Stereo
Headphone Amplifier
Check for Samples: LM48861, LM48861TMBD
1
FEATURES
DESCRIPTION
The LM48861 is a single supply, ground-referenced
23
• Ground Referenced Outputs – Eliminates
stereo headphone amplifier. Part of TI's PowerWise™
Output Coupling Capacitors
product family, the LM48861 consumes only 3mW of
• Common-Mode Sensing
power, yet still provides great audio performance. The
• Advanced Click-and-Pop Suppression
ground-referenced architecture eliminates the larger
DC blocking capacitors required by traditional
• Low Supply Current
headphone amplifier's saving board space and
• Minimum External Components
reducing cost.
• Micro-Power Shutdown
The LM48861 features common-mode sensing that
• ESD Protection of 8kV HBM Contact
corrects for any differences between the amplifier
• Available in Space-Saving 12-Bump DSBGA
ground and the potential at the headphone return
terminal, minimizing noise created by any ground
Package
mismatches.
APPLICATIONS
The LM48861 delivers 22mW/channel into a 32Ω
load with <1% THD+N with a 1.8V supply. Power
• Mobile Phones
supply requirements allow operation from 1.2V to
• Portable Electronic Devices
2.8V. High power supply rejection ratio (PSRR), 83dB
• MP3 Players
at 217Hz, allows the device to operate in noisy
environments without additional power supply
KEY SPECIFICATIONS
conditioning. A low power shutdown mode reduces
supply current consumption to 0.01µA.
• Output Power/Channel at
V
DD
= 1.5V,THD+N = 1%
Superior click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
– R
L
= 16Ω 12mW (typ)
The LM48861 is available in an ultra-small 12-bump,
– R
L
= 32Ω 13mW (typ)
0.4mm pitch, DSBGA package (1.215mm x
• Output Power/Channel at
1.615mm).
V
DD
= 1.8V, THD+N = 1%
– R
L
= 16Ω 24mW (typ)
– R
L
= 32Ω 22mW (typ)
• Quiescent Power Supply Current at 1.5V
2mA (typ)
• PSRR at 217Hz 83dB (typ)
• Shutdown Current 0.01μA (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.
2PowerWise is a trademark of Texas Instruments.
3All 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.
页面指南
