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ISL99201, ISL99202
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Intersil Introduces World’s Smallest Audio Amplifiers Featuring Lowest Power Consumption, Highest RF Immunity
ISL99201 and ISL99202 Feature Audiophile Quality Performance, Superb Power Efficiency, Click-and-Pop Suppression, Complete Undervoltage and Short Circuit Protection
MILPITAS, CA, August 31, 2009 – Intersil
Corporation (NASDAQ Global Select: ISIL),
a world leader in the design and manufacture of high-performance analog
and mixed-signal semiconductors, introduced two new audio amplifiers
featuring the industry’s lowest power consumption, smallest
size, and highest RF immunity.
The ISL99201 and ISL99202 are
the first audio products in a new family of ultra-small-footprint packages
that will enable smaller, thinner and lighter consumer devices that run longer
on a battery charge. These audio amplifiers are particularly well suited for
use in SmartPhones, PDAs, game consoles, MP3 and personal media players, personal
navigation devices and LCD TVs.
The ISL99201,
available in 9-bump 0.4mm pitch WCSP, is the world’s smallest Class
D amplifier. It is a filterless, fully integrated, high-efficiency mono
amplifier capable of delivering up to 2.5W into a 4 ohm load. It features
a low-noise modulation scheme, operating with 86 percent efficiency at 400mW
into 8 ohms, and has a signal-to-noise ratio (SNR) that is better than 95dB.
The ISL99201 also includes a micropower shutdown mode with a typical shutdown
current of 200nA. The fully-differential input of the ISL99201 provides 75dB
rejection to common mode noise on the input. The ISL99201 is available
in three fixed-gain settings that reduce Bill-of-Materials (BOM) costs and
save board space. It is also available with programmable gain setting option
for design flexibility. In addition to the WCSP package, the ISL99201
is available in an 8-lead TDFN package.
Available in 12-bump 0.4mm pitch WCSP, Intersil’s ISL99202 is
the world’s smallest stereo capfree headphone
amplifier, and supports 16 ohm to 600 ohm speaker impedance. Its ultra-wide
operating voltage of 2.4V to 5.5V makes the new amplifier ideal for use in
mobile battery-powered applications that use 2 AA or single cell Li-Ion batteries,
as well as in notebook computers using 3.3V to 5V power supplies. It
is also available in 12-lead TQFN package.
Industry’s Best RF Immunity
With the proliferation of wireless technology, audio amplifiers are routinely
exposed to RF energy. For example, even though phones using the GSM protocol
operate at frequencies between 800MHz and 1900MHz, the data transfers in bursts
at 217Hz, which is in the audio frequency range. Many competitive amplifiers
reproduce this noise in the headphones which results in the now familiar “bumble
bee” buzz. Some audio amplifiers detect the 217 Hz signal, akin to
demodulation of FM transmissions, and amplify it to the headphone output. The ISL99202 has
a unique input architecture which suppresses this demodulation and prevents the
bursts at 217Hz from interfering with the audio output.
In addition, the bursts at 217Hz cause spikes on the power supply. Some
poorly designed amplifiers couple these power supply spikes through the amplifier
outputs, resulting in an audible buzz. Amplifiers typically have a parameter
called power supply rejection ratio (PSRR), which specifies the ability of
the amplifier to reject noise from the power supply. The ISL99202 is
designed to have the highest PSRR in its class, which also contributes to
its industry-leading RF immunity.
The ISL99202 also
features audiophile quality SNR and THD specifications, and Intersil’s
state-of-the-art click-and-pop suppression technology. Comprehensive protection
features include undervoltage and short-circuit protection, as well as thermal
shutdown.
Packaging, Pricing and Availability
The ISL99201 is
available now in 8-Ld TDFN packages with prices starting at $0.56 each in
1000-unit quantities. In 9-bump WCSP, prices start at $0.47. The ISL99202
is sampling now in 12-Ld TQFN and 0.4mm pitch 12-ball WLCSP, with 1,000-unit
pricing of $0.72 and $0.65, respectively.
For more information, please visit http://www.intersil.com/products/deviceinfo.asp?pn=ISL99201
To view a high-resolution downloadable photo of these new products, visit
Intersil’s photo room at: http://www.intersil.com/pressroom/photoarchives.asp.
About Intersil
Intersil Corporation is a
leader in the design and manufacture of high-performance analog and mixed-signal
semiconductors. The Company's products address some of the industry's fastest
growing markets, such as, flat
panel displays, cell phones, other handheld systems,
and notebooks. Intersil’s product families address power
management functions and analog signal processing functions. Intersil
products include ICs for battery
management, hot-plug controllers, linear
regulators, power
sequencers, supervisory
ICs, bridge
drivers, PWM
controllers, switching
DC/DC regulators, Zilker
Labs Digital Power ICs and power MOSFET drivers; optical
storage laser diode drivers; DSL line drivers; D2Audio products; video and
high-performance operational amplifiers; high-speed
data converters; interface
ICs; analog switches and
multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military,
space and radiation-hardened applications.
For more information about Intersil or to find out how to become a member
of our winning team, visit the Company's web site and career page at www.intersil.com.
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