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Analog Devices Press Release - August 21, 2009
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ADI Announces New Tiny Difference Amps: Small Size, Small Price, Big Performance
Analog Devices’ AD827x high-speed difference amplifiers reduce board space for power-efficient, robust
process- and motor-control applications.
  August
21, 2009 -- NORWOOD, Mass.--(EON: Enhanced Online News)-- Analog Devices, Inc. (ADI), a global leader in
high-performance semiconductors for signal-processing applications and leading provider of amplifier technology,
introduced today three new low-power difference amplifiers that are as small as 4.9 mm x 3 mm and featuring slew
rates up to 10 times faster than competing products. Designed for high-performance, power-critical applications,
the
AD8276,
AD8277 and
AD8278 difference amplifiers are half the size of competing devices and much smaller than discrete
alternatives consisting of resistor arrays and operational amplifiers. The amplifiers also eliminate the added
expense and design overhead associated with complex peripheral protection circuitry.
The slew rate of 1.1-V/μs (volts per microsecond) combined with an input range of two times the power
supply make the AD827x products well suited for robust voltage and current sensing in process-control,
motor-control, and power-management applications. In addition, the low price is unprecedented with versions
available at under $1 USD each.
The AD827x low-power difference amplifiers combine the benefits of a wide
supply range of 2.5-V to 36-V and low power with a 550-kHz bandwidth that is two times faster than other low-power
difference amplifiers. In addition, these difference amplifiers feature 220-μA maximum quiescent current with an
86-dB CMRR (common-mode rejection ratio) that is 10-dB greater than competing devices. AD827x difference
amplifiers reject external interferences in low-power systems without increasing system power dissipation.
Response time includes a 1.1-V/μS slew rate and 15-μS settling time to 0.01 percent. The settling time is more
than five times faster than other amplifiers in their class and ensures shorter propagation delays in control
loops. On-chip resistors are laser-trimmed for accurate gain, low gain drift, and high common-mode rejection.
Availability, Pricing and Complementary Parts
| Product |
Sampling
Availability |
Temperate Range |
Price Each Per 1,000 |
Packaging |
|
AD8276 Single Channel Gain=1 |
NOW |
-40°C - +125°C |
$0.95 |
8-lead SOIC and MSOP packages |
|
AD8277 Dual Channel Gain=1 |
NOW |
-40°C - +125°C |
$1.60 |
14-lead SOIC package |
|
AD8278 Single Channel Gain=0.5/2 |
NOW |
-40°C - +125°C |
$0.95 |
8-lead SOIC and MSOP packages |
The AD827x difference amplifiers work well with other low-power components, such as ADI’s ADCs
(analog-to-digital converters) including the
AD7450 12-bit SAR ADC and AD7982 18-bit PulSAR® ADC, as well as low-power operational amplifiers, including
the
AD8500 precision CMOS op amp, AD8538 auto-zero op amp, and AD8603 rail-to-rail input-output op amp.
Using the AD8276 Difference Amp as a Low-cost Current Source
Current sources using the low-power
AD8276 difference amplifier and the AD8603 op amp are affordable, flexible, and small in size. Performance
characteristics, such as initial error, temperature drift, and power dissipation, are excellent. Engineers can
quickly and with confidence design this circuit by accessing circuit note CN-0099 from ADI’s Circuits from the Lab
collection. Circuits from the Lab is a design assistance resource that provides design engineers with tested
circuit solutions for many common applications. Each circuit has been verified by ADI test engineers and can be
easily integrated into designs, resulting in reduced design risk and faster time-to-market. Close to 100 circuit
notes are available, featuring some of ADI’s most popular products and how they address common design challenges.
For more information, visit
http://www.analog.com/pr/AD8276,
http://www.analog.com/pr/AD8277
and http://www.analog.com/pr/AD8278. For product
information on amplifiers, visit
http://www.analog.com/pr/amplifiers-and-comparators.
PulSAR is a registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
About Analog Devices, Inc.
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 throughout the industry 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.
For more information on ADI's most recent product releases, visit our
Press Release home page.
Follow ADI on Twitter at
http://twitter.com/ADI_News
Contacts
Analog Devices, Inc.
Bob Olson
781-937-1666
bob.olson@analog.com
Posted 8/22/2009 |
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