Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD8675
Edited by the Electronicstalk Editorial
Team on 18 May 2005
Precision industrial amplifier boasts
lower noise
The AD8675 is billed as the industry's only 36V low-noise precision amplifier with a voltage noise density of 2.5V/(rt)Hz and rail-to-rail output.
For industrial applications such as automated test equipment (ATE), analytical instruments and industrial controls that require high signal voltages and low noise, Analog Devices has introduced the AD8675, the industry's only 36V, low-noise precision amplifier with a voltage noise density of 2.5V/(rt)Hz and rail-to-rail output Enabled by ADI's iPolar trench isolation manufacturing process technology, the dual-supply AD8675 is only half the cost of competing amplifiers while reducing power 30%, lowering input bias current 75%, and providing 65% less drift over temperature
This article was originally published on Electronicstalk on 14 Sep 2001 at 8.00am (UK)
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The new device also achieves three times the bandwidth and ships in a 3 x 5mm 8-lead MSOP (mini small outline plastic) package, just half the size of other amplifiers designed for high-voltage industrial applications, which meets the requirements of industrial systems developers for improved system performance and smaller equipment.
"While the electronics industry focused on low-voltage, battery-powered consumer applications, the high-voltage, industrial equipment manufacturer has been largely ignored", said Steve Sockolov, Product Line Director, Precision Amplifier Group at Analog Devices.
"However, with innovative manufacturing technology processes such as iPolar enabling high-voltage analogue components like the AD8765, ADI is reaffirming its commitment to the industrial marketplace".
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Leveraging a proprietary deep trench process that enables a major reduction in transistor size and much higher performance, the AD8675 was constructed with poly emitters to provide the absolute minimum 1/f noise performance possible.
By incorporating rail-to-rail output, the AD8675 increases signal-to-noise ratio (SNR) and dynamic range by 30% and improves system resolution.
The AD8675 achieves its precision in part due to an offset voltage of 20uV, a drift less that 0.2uV/C, and noise of only 100nV peak-peak (from 0.1 to 10Hz), making it perfectly suited for applications where both AC and DC error sources cannot be tolerated.
For applications with even lower error tolerances, the AD8675 has a proprietary offset nulling capability that allows a combination of both device and system offset errors up to 1mV to be compensated externally.
Unlike previous nulling schemes, the new technique does not degrade CMRR or offset drift performance of the amplifier.
The AD8675 is currently sampling and will be available in production quantities in September 2005.
Fully specified to operate over a temperature range of -40 to +125C, the device is available in 8-lead MSOP and 8-lead narrow SOIC (small outline integrated circuit) packages.
Pricing is $1.17 per unit in 1000-piece quantities.
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