MILPITAS, Calif., July 13, 2015 /PRNewswire/ -- Intersil
Corporation (NASDAQ: ISIL), a leading provider of innovative power
management and precision analog solutions, today introduced the
ISL71840SEH and ISL71841SEH, new radiation hardened (rad hard)
multiplexers that offer best-in-class electrostatic discharge (ESD)
protection, and the industry's highest signal chain accuracy and
timing performance. The ISL71840SEH 30V 16-channel multiplexer is a
drop-in replacement for Intersil's widely adopted HS9-1840ARH,
which has been aboard nearly every satellite and space exploration
mission, including NASA's recent Orion spacecraft flight test. For
applications with form factor constraints, the new ISL71841SEH 30V
32-channel multiplexer offers high performance and 41% reduced
board space compared with an ISL71840SEH two-chip solution.
The ISL71840SEH and ISL71841SEH rad hard multiplexers deliver
ultra-high performance in the most demanding environments by
leveraging Intersil's proprietary silicon on insulator process,
which provides single event latch-up (SEL) robustness in heavy ion
environments. The enhanced 8kV ESD protection feature of these
devices eliminates the need for costly external protection diodes
on the input pins. And their reduced RON of 500 Ohms at
+/-5V and propagation delays of less than 800ns increase the
overall performance and accuracy of telemetry signals processed and
multiplexed into an analog-to-digital converter (ADC) input.
The ISL71840SEH and ISL71841SEH offer over-voltage protection on
a per-switch basis to maintain the continuous processing of
telemetry test points. If any input channel experiences an
over-voltage condition, the remaining channels continue sending
data to the ADC. Both multiplexers provide a "cold spare" redundant
capability, allowing the connection of 2-3 additional unpowered
multiplexers to a common data bus. This is an especially important
feature for mission-critical space flights lasting up to 20 years.
If required for any reason, a redundant multiplexer is immediately
activated. Both multiplexers provide a wide supply range with
split-rail operation from +/-10.8V to 16.5V and an absolute maximum
of +/-20V, providing designers with plenty of de-rating
headroom.
"The ISL71840SEH and ISL71841SEH multiplexers build upon the
performance and reliability of the HS9-1840ARH, while providing
additional features to support the latest needs of data acquisition
systems," said Philip Chesley,
senior vice president of Precision Products at Intersil. "The
16-channel and 32-channel devices are ideally suited to meet the
mission assurance needs of next-generation satellites and manned
spacecraft for deep space exploration."
Key Features and Specifications
- Delivers 8kV human body model (HBM) ESD protection
- Provides true rail-to-rail operation and features over-voltage
protection with shutoff
- Cold sparing from ground +/-25V and analog over-voltage range
from ground +/-35V
- Off switch leakage of 100nA and low RON of less than
500 Ohms reduces power consumption, and improves signal integrity
and total harmonic distortion
- Triple redundant decoders with a fast response time of <5us
drastically improves single event transient (SET) performance
- Improved off-isolation and crosstalk rejection ensures the
output leaks to ground whenever the multiplexer is disabled
- Adjustable logic threshold control with VREF pin
- High dose rate (50-300rad(Si)/s) radiation tolerance of
100krad(Si)
- Low dose rate (0.01rad(Si)/s) radiation tolerance of
50krad(Si)
- SEL/B immune up to 86MeV.cm2/mg
The ISL71840SEH and ISL71841SEH multiplexers can be combined
with the ISL71590SEH rad hard temperature sensor, ISL71090SEH25
voltage reference, and operational amplifiers such as the
ISL70444SEH, ISL70244SEH, ISL70417SEH, ISL70218SEH, ISL70227SEH,
ISL70419SEH to support a complete analog signal chain with superior
radiation tolerant performance.
Availability
The ISL71840SEH 16-channel multiplexer is
available in a compact 18.8mm x 14mm, 28-lead ceramic flatpack
package, and the ISL71841SEH 32-channel multiplexer comes in a 14mm
x 14mm, 48-lead ceramic quad flatpack. Both multiplexers are also
available in die form. Two evaluation boards are available to
evaluate device features and performance: 16-channel
ISL71840SEHEVAL1Z and 32-channel ISL71841SEHEVAL1Z.
For more information on the ISL71840SEH and ISL71841SEH
multiplexers and evaluation boards, please visit:
www.intersil.com/products/isl71840seh.
Intersil at NSREC 2015
Come see Intersil's radiation
hardened ICs in booth #37 at the IEEE Nuclear and Space Radiation
Effects Conference (NSREC) in Boston,
MA, July 13-17.
About Intersil
Intersil Corporation is a leading
provider of innovative power management and precision analog
solutions. The company's products form the building blocks of
increasingly intelligent, mobile and power hungry electronics,
enabling advances in power management to improve efficiency and
extend battery life. With a deep portfolio of intellectual property
and a rich history of design and process innovation, Intersil is
the trusted partner to leading companies in some of the world's
largest markets, including industrial and infrastructure, mobile
computing, automotive and aerospace. For more information about
Intersil, visit our website at www.intersil.com.
Intersil and the Intersil logo are trademarks or registered
trademarks of Intersil Corporation. All other brands, product names
and marks are or may be trademarks or registered trademarks used to
identify products or services of their respective owners.
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SOURCE Intersil Corporation