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Intersil’s New ISL1539A Provides Dual Port, High Performance VDSL2 Line Drivers for DSLAM Designs
Supports both 8MHz and 17MHz VDSL2 Profiles, Backward Compatible with ADSL2+ Standard
MILPITAS, CA, Dec. 16, 2009 — Intersil
Corporation —(NASDAQ Global Select: ISIL),
a world leader in the design and manufacture of high-performance analog
and mixed-signal semiconductors, today introduced the ISL1539A,
the latest addition to its family of DSL line
drivers for the rapidly-growing VDSL2 ultra-high bit rate Internet
connectivity standard.
The new ISL1539A supports both the 8MHz and 17MHz VDSL2 profiles, and is compatible
with the widely used ADSL2+ standard. It provides a low-power solution in
a space-efficient package to enable densely packed 24-port and 48-port deployments.
It features 240MHz bandwidth and greater than 3000V/usec differential slew
rate, ensuring adequate design margins for the most demanding line interface
designs and multitone power ratio (MTPR) targets.
The ISL1539A includes four internal wideband op amps which are configured
as two pairs of differential line drivers. Each driver is a wideband
current feedback amplifier providing very high slew rates at low quiescent
supply current. Each of the two pairs of amplifiers (ports) also includes
two logic pins to step the quiescent current level in single designs supporting
multiple DSL standards. In addition, an overall power adjustment pin
provides very low quiescent power in less demanding applications. Full
power is nominally 27.2mA/port. Designers can select from medium power
cutback to 23mA/port, a low power condition at 13.5mA/port, and an off state
consuming <0.5mA/port.
With its wide 240MHz bandwidth and low distortion (< -89dBc at 1 MHz, 2Vpp),
the ISL1539A can deliver > -67dBc MTPR into a 100 ohm line load for the
VDSL2 8b profile. The output stage uses a low headroom, high peak current
design that can support high power push/pull line driver applications. On ±12V
supplies, the ISL1539A offers 1.1V headroom with >360mA peak linear output
current. Driving differentially in a VDSL2 application circuit, this equates
to a 41.8 V peak-to-peak swing into a 100 ohm differential load. The
device also supports high spurious-free dynamic range (SFDR) operation from
supplies as low as ±7.5V. Intended to be used as differential pairs,
the two-port ISL1539A includes special circuitry to minimize common mode loop
peaking while also reducing the common mode output noise spectrum.
Pricing and Availability
The ISL1539A is available now in compact 24-lead QFN packages. Prices per
1,000 pieces start at $2.27 each.
For more ISL1539A information visit:
http://www.intersil.com/products/deviceinfo.asp?pn=ISL1539A
To view a high-resolution downloadable photo of the ISL1539A 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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