Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD8250 and AD8251
Edited by the Electronicstalk Editorial
Team on 02 August 2006
Amps are instrumental in precision
Digitally programmable instrumentation amplifiers claim unmatched accuracy and bandwidth, plus the speed and precision needed for advanced industrial and instrumentation applications.
Analog Devices has introduced two digitally programmable instrumentation amplifiers (in-amps) that offer unmatched accuracy and bandwidth, plus the speed and precision needed for advanced industrial and instrumentation applications These applications, which include test, control and high-speed data acquisition systems, require fast, accurate measurements and robust signal conditioning over large voltage ranges
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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The versatile AD8250 and AD8251 in-amps achieve bandwidth of up to 12MHz - twice the throughput of the nearest competing device - while delivering 75% lower drift than comparable in-amp solutions.
Leveraging technological advancements enabled by Analog Devices' submicron iCMOS (industrial CMOS) process technology, the AD8250 and AD8251 digitally programmable in-amps draw just 3.5mA - 75% less than competing devices - and are available in space saving 10-lead MSOP (mini small-outline plastic) packages, which are 90% smaller than the nearest in-amps in their class.
"Data acquisition systems, automatic test equipment and biomedical instruments demand both high bandwidth and DC accuracy".
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"Manufacturers have tried to achieve this with a variety of in-amps or a combination of discrete devices", said Steve Sockolov, Product Line Director, Precision Signal Processing, Analog Devices.
"By offering industry-leading bandwidth and precision, combined with low power consumption and a space-saving package, Analog Devices' new programmable in-amps allow our customers to increase performance and channel density while maintaining ease of use in their end equipment".
Designed specifically for industrial and instrumentation equipment with large voltage ranges, the AD8250 and AD8251 operate with +/-5 to +/-12V power supplies, providing 12MHz bandwidth and 0.5us settling time to 0.01%.
The 1uV/C offset drift and 10ppm/C gain drift are the lowest of any programmable gain in-amp.
Additional flexibility is enabled through the new in-amp family's digitally programmable gain setting, which lets designers adjust gain even after the devices are designed into the system.
The in-amps are identical but for their gain settings, with the AD8250 offering gain settings of 1, 2, 5 and 10, and the AD8251 gain settings of 1, 2, 4 and 8.
The user interface allows designers to set the 2bit gain-control word in one of three ways: it can be latched using the clock input; it can be set within 1 microsecond in transparent mode; or the bits can be strapped to a high- or low-voltage potential, permanently setting the gain.
The AD8250 and AD8251 in-amps are tailored to operate with high-performance ADCs, such as the AD7621, AD7671/74/77/78/79, AD7685 and AD7946 PulSAR ADCs from Analog Devices, and with ADI's ADR431 and ADR435 voltage references.
The AD8250 and AD8251 digitally programmable in-amps are sampling now, with production quantities available in October 2006.
Housed in 10-lead MSOP packages, they are priced at $4.95 in 1000-unit quantities.
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