Analog Devices : Precision op amp claims lowest offset and drift

Analog Devices has 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 ADA4627 JFET-input op amp specifies 5 pA (picoamp) maximumbias 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 ADA4627 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 ADA4627 JFET-input op amp is the first product created with ADI’s dielectrically-isolated iPolar®36-V precision process technology. This proprietary process is optimised for linear circuits and enables both higher performance and extended signal chain integration in industrial and instrumentationapplications.  

The ADA4627 JFET-input op amp reduces signal distortion by a factor of two featuring an 82V/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 ohms.

The ADA4627 has 6.1-nV/rt-Hz voltagenoise and 120-µV (microvolt) typical offset voltage (200 µV/300µV max for the A/B grades).  The ±18-V ADA4627 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 (analogue-to-digital converter) drivers and buffers, DAC (digital-to-analogue converter) output buffers, high-source-impedance sensors and photo diodes.

Availability, Pricing, Complementary Components and Tools

The ADA4627 is optimised 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, theNI Multisim™ Analog Devices® Edition SPICE simulation program,and Analog Filter Wizard™ design and product selection tool.

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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.

About Analog Devices in Europe

In Europe, Analog Devices accounts for about one fifth of the company’s worldwide revenues and worldwide work force. The company has a manufacturing facility in Limerick, Ireland, and design and development centres in Denmark, England, Finland, Scotland, Slovakia, Spain and Ireland. European client references include main telecom equipment manufacturers Alcatel, Ericsson and Nokia-Siemens Networks, automotive systems manufacturers such as Autoliv, Bosch and Continental, consumer references such as Harman and Philips, and a variety of industrial clients including ABB, Agilent Technologies, Siemens and Rhode & Schwarz.

Pascal Cerruti
Analog Devices Inc., MarCom & PR Europe
Direct line: +33 (0) 1 46 74 45 38

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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