-- 36V Current Feedback Op Amp Provides High Slew Rate, Extended Bandwidth
-- 5V Rail-to-Rail Input and Output Op Amp Breaks High-Fidelity,
Low-Voltage Performance Barrier
SANTA CLARA, Calif., Oct. 1 /PRNewswire-FirstCall/ -- Further expanding
its high-fidelity operational amplifier family, National Semiconductor
Corporation (NYSE: NSM) today introduced a 5V rail-to-rail input and output
(RRIO) and a 36V current feedback operational amplifier (op amp). The
LME49721 RRIO op amp's combined specifications provide the high-fidelity
performance and signal conditioning required by high-end portable devices
and applications where supply rails are limited to lower voltages. The
LME49713 current feedback op amp delivers ultra-low distortion, low noise,
extended bandwidth past 190 MHz and fast settling times down to 50
nanoseconds.
Both op amps join a family of high-performance, high-fidelity op amps
that includes the award-winning LM4562, which set a new industry standard
with 0.00003 percent total harmonic distortion plus noise (THD+N).
National's dual 5V LME49721 RRIO op amp maximizes signal integrity by
allowing the input signal and output signals to swing within 20 mV of
either rail. Its low 4.0 nV/sqrt Hz input referred noise density and 0.0018
percent THD+N make it well-suited for lower-voltage supply-rail
applications (plus or minus 1.1V to plus or minus 2.5V) such as 5V
digital-to-analog converters (DACs), portable audio devices, signal
conditioning, data acquisition, process control and test equipment.
The single LME49713 current feedback op amp features 1.9 nV/sqrt Hz
input noise density, THD+N of 0.00008 percent and 150-Ohm output drive. Its
1900 V/us slew rate ensures accurate bandwidth and high dynamic range for
all signal conditioning applications, including crosspoint switchers,
multimedia broadcast systems, HDTV-compatible systems, line drivers and
distribution amplifiers.
Key Technical Features and Benefits
The LME49721 provides output current capability up to 100 mA. It is
unity- gain stable over a wide supply range of plus or minus 1.1V to 2.75V,
with power-supply rejection rate (PSRR) of more than 100 db and a typical
low input bias current of 40 fA. The output stage of the LME49721 can swing
to within 20 mV of either power supply voltage when driving 2-kiloOhm loads
or to within 30 mV when driving 600-Ohm loads. To ensure high dynamic
range, it has a slew rate of 8.5 V/us while allowing the input signal to
drive to the rails.
The LME49713 is unity-gain stable over a wide supply range of plus or
minus 5V to 18V. Over this supply range, the LME49713 input circuitry
maintains a PSRR of more than 100 db and a common-mode rejection rate
(CMRR) of 88 dB. The settling time to within 0.1% is 50 nSec for a 10V
step.
National at Audio Engineering Society Convention
National is demonstrating its latest high-performance products in booth
744 of the 123rd International Audio Engineering Society Convention in New
York City from Oct. 5 through Oct. 8. On Mon., Oct. 8, the company's
experts will lead a series of one-hour free technical seminars focused on
new technologies, high-performance power amplifiers and signal-path circuit
performance. To register, visit http://www.national.com/rsvp/audioseminar.
Pricing and Availability
The LME49721 is available now in an 8-lead SOIC package and is priced
at $1.50 each in 1,000-unit quantities. The LME49713's 8-lead, narrow-body
SOIC package is priced at $2.49 each in 1,000-unit quantities. More
information, easy-to-order samples and evaluation boards are available at
http://www.national.com/pf/LM/LME49713.html and
http://www.national.com/pf/LM/LME49721.html.
About National's Audio Portfolio
National Semiconductor has been a leading provider of audio solutions
for more than 30 years and offers a wide range of products in its
Boomer(R), Overture(R) and high-performance audio lines. National works
with every major handset maker in the world and is the leading provider of
analog audio solutions for the cell phone market. The company's line of
Boomer audio amplifiers and subsystems enhance and enrich the entire range
of sound - from voice, ring sounds and music -- that can be amplified in
mobile phones and other portable equipment. National manufactures Class AB
and Class D speaker amplifiers, headphone amplifiers and audio subsystems
for many applications ranging from portable devices to high-power,
high-fidelity audio systems. The company offers its higher-power Overture
amplifiers for mid-performance consumer applications, and National's new
high-performance series brings dramatically improved sound quality to
high-fidelity consumer and professional audio equipment. For more
information on National's audio products, visit http://audio.national.com.
About National Semiconductor
National Semiconductor, the industry's premier analog company, creates
high-value analog devices and subsystems. National's leading-edge products
include power management circuits, display drivers, audio and operational
amplifiers, interface products and data conversion solutions. National's
key analog markets include wireless handsets, displays, communications
infrastructure, medical, automotive, industrial, and test and measurement
applications. Headquartered in Santa Clara, Calif., National reported sales
of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional
company and product information is available at http://www.national.com.
Media Contact Reader Information
Naomi Mitchell Design Support Group
National Semiconductor (800) 272-9959
(408) 721-2142 World Wide Web
naomi.mitchell@nsc.com http://www.national.com
SOURCE National Semiconductor Corporation
 back to top
Related links:
http://www.national.com/
CONTACT:
Naomi Mitchell of National Semiconductor,
+1-408-721-2142, naomi.mitchell@nsc.com, or Reader Information,
Design Support Group, +1-800-272-9959
|
