Analog Devices Unveils Op Amp with Over-Voltage Protection for
Industrial Process Controls
ADI’s ADA4091-2 dual rail-to-rail op amp
delivers industry’s best combination of low
offset, low offset drift and wide gain-bandwidth across a variety of
sensor inputs, while over-voltage protection circuitry prevents
phase-inversion errors.
NORWOOD, Mass. (Business Wire EON/PRWEB ) September 19, 2008 --
Analog Devices, Inc. (ADI), a world leader in semiconductors for signal
processing applications and leading developer of amplifier
technology, today introduced a highly integrated precision
operational amplifier (op amp) with on-chip over-voltage protection
circuitry. The ADA4091-2
precision op amp affords industrial equipment designers the industry’s
most reliable, accurate, easy-to-use alternative to competing discrete
analog input solutions.
“Industrial amplifiers are subject to fault
voltages from a variety of sources, including electro-magnetic
interference, damaged cabling, lightning strikes and other disturbances
on the power grid, incorrect hookups to other system components and
power-line surges when power to the system is restored after routine
service or equipment upgrades,” said Steve
Sockolov, product line director, Precision Signal Processing, Analog
Devices. “Such over-voltage conditions can
cause phase inversion or damage the amplifier and other circuitry,
resulting in system lock-up or outright failure.”
The ADA4091-2 op amp’s performance is fully
specified, including the device’s on-chip
over-voltage circuitry. This simplifies equipment design and error
analysis and results in more consistent output readings in industrial
process controls, battery-powered instrumentation, power supply control
and protection systems and remote sensors.
By providing localized signal conditioning and the industry’s
best combination of low offset, low offset drift and wide
gain-bandwidth, the ADA4091-2 delivers precision performance across a
variety of sensor inputs, while the over-voltage protection feature
prevents phase-inversion errors and excessive input current flows during
transient or fault conditions. The performance of competing op amps must
be evaluated to compensate for the error effects of discrete
over-voltage circuitry on system performance, which adds a layer of
complexity and uncertainty to the design process.
By integrating the requisite over-voltage protection circuitry, the
ADA4091-2 dual micro-power op amp with rail-to-rail inputs and output
allows system designers to reduce the number of external components
needed to ensure stable system operation.
The new 1.5-MHz op amp features a low 350-µA-per-channel
supply current, a 0.5-V/µs slew rate, and
offset voltage of 500 µV max., which assure
system accuracy with varied sensor types in harsh operating environments
while eliminating the need for cooling fans or other costly thermal
management devices. The 36-V ADA4091-2 op amp protects up to 12 V above
and below the supply rails at ±15 V and 25 V
above and below the supply rails at ±5 V. In
an industrial signal chain, the ADA4091-2 is well matched to operate
with a range of ADCs (analog-to-digital converters), including ADI’s
AD761x
and AD763x
PulSAR® ADCs and AD7190
and AD7794
sigma-delta ADCs.
Availability and Pricing
The ADA4091-2 is sampling now and will be available in production
quantities in November. The ADA4091-2 is housed in an 8-lead LFCSP
(lead-frame chip-scale package) and is priced at $1.80 per unit in
1,000-unit quantities. For more information, visit www.analog.com/pr/ADA4091.
Analog Devices and Amplifiers
Analog Devices is a world leader in the design and manufacture of
amplifiers. Amplifiers along with data converters are the foundation of
the company. ADI is recognized by designers as offering the industry’s
highest performance and most reliable high-speed, precision, RF,
broadband, and instrumentation amplifiers. ADI also offers an extensive
portfolio of comparators that are used in a wide variety of
applications. For more information, visit http://www.analog.com/en/amplifiers-and-comparators/
products/index.html.
About Analog Devices
Innovation, performance, and excellence are the cultural pillars on
which Analog Devices has built one of the longest standing, highest
growth companies within the technology sector. Acknowledged
industry-wide as the world leader in data conversion and signal
conditioning technology, Analog Devices serves over 60,000 customers,
representing virtually all types of electronic equipment. Celebrating
over 40 years as a leading global manufacturer of high-performance
integrated circuits used in analog and digital signal processing
applications, Analog Devices is headquartered in Norwood, Massachusetts,
with design and manufacturing facilities throughout the world. Analog
Devices' common stock is listed on the New York Stock Exchange under the
ticker “ADI” and
is included in the S&P 500 Index. http://www.analog.com
PulSAR is a registered trademark of Analog Devices, Inc.
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