ADI Precision JFET-Input Op Amp Achieves Industry’s Lowest Offset
Analog Devices’ ADA4627 JFET-input op amp delivers best-in-class signal acquisition and fast settling times.
and Drift Over Extended Industrial Temperature Range
27, 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,
today introduced a compact, 36-volt precision JFET-input (junction field-effect transistor input) operational
amplifier (op amp) with the industry’s lowest noise and distortion over the widest temperature range. The 19-MHz
JFET-input op amp specifies 5 pA (picoamp) maximum bias current at 25 degrees C and 500 pA maximum
over the industrial temperature range of –40 degrees C to 85 degrees C, which is ten times lower than competing
JFET-input amplifiers. The
JFET-input op amp also offers best-in-class dc precision with very low offset drift of 2µV/°C
maximum over the -40 degrees C to +125 degrees C extended industrial temperature range, which is three times
better than competitive offerings.
Designed for applications that require accurate signal acquisition and
fast settling times, such as optical, broadband and microwave communications systems; high-speed data acquisition
systems; professional audio equipment; medical and electronic instrumentation; and automated test equipment—the
JFET-input op amp is the first product created with ADI’s dielectrically-isolated iPolar® 36-V
precision process technology. This proprietary process is optimized for linear circuits and enables both higher
performance and extended signal chain integration in industrial and instrumentation applications.
JFET-input op amp reduces signal distortion by a factor of two featuring an 82-V/µS (micro second)
slew rate, 120-dB (typical) open-loop gain, and high output current capacity. The exceptional combination of high
drive, high slew rate and high open-loop gain also allows the ADA4627 to achieve the low-distortion levels
required by precision instrumentation and professional audio equipment while driving impedances as low as 600
has 6.1-nV/rt-Hz voltage noise and 120-µV (microvolt) typical offset voltage (200 µV/300µV max for
the A/B grades). The ±18-V
JFET-input op amp operates from standard ±12-V and ±15-V industrial power supplies. It has a wide
±5-V to ±18-V operating-voltage range and is well-suited to functions that require accurate reproduction over a
wide frequency range with minimal loading, including ADC (analog-to-digital converter) drivers and buffers, DAC
(digital-to-analog converter) output buffers, high-source-impedance sensors and photo diodes.
Pricing, Complementary Components and Tools Availability, Pricing and Complementary Parts
is optimized for interoperability with Analog Devices’ data converter portfolio, including its
PulSAR® ADCs, such as the AD7949 14-bit, 8-channel, 250-kSPS PulSAR ADC and the AD7625 16-bit, 6 MSPS PulSAR
differential ADC. Design tools available for use with the ADA4627 include the ADIsimOpAmp parametric evaluation
tool, the NI Multisim™ Analog Devices® Edition SPICE simulation program, and Analog Filter Wizard™ design and
product selection tool.
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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.
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