Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD8556
Edited by the Electronicstalk Editorial
Team on 13 May 2005
Sensor amplifier has automotive
aspirations
A new digitally programmable sensor amplifier features internal EMI filtering and a wide temperature range making it well suited for a variety of automotive and industrial applications.
Analog Devices is adding a new member to its family of digitally programmable amplifiers with the introduction of a sensor amplifier well suited for a variety of automotive and industrial applications The AD8556 features internal EMI (electromagnetic interference) filtering, a very wide temperature range, low offset voltage and drift, and open and shorted wire protection, making it ideal for pressure sensors in ABS (antilock brake systems), occupant detection systems, fuel level sensors, transmission controls and precision strain or pressure gauges
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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In addition, the AD8556 is a zero-drift, sensor amplifier with digitally programmable gain and output offset.
Priced up to one-third less than competing solutions, the AD8556 is the industry's only sensor amplifier to pack unprecedented combinations of performance into a small 4 x 4mm LFCSP package.
ADI's AD8556 is specified over an extended temperature range of -40 to +140C to accommodate the higher temperature requirements of automotive and industrial applications.
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On-chip EMI filtering - which protects against unwanted error conditions that can drastically limit system performance - reduces the number of external components and enables the AD8556 to deliver high accuracy.
For industrial and automotive systems that require precision and reliability, the AD8556 also integrates gain and offset adjustment and open and shorted wire protection.
The AD8556 allows system designers to use software to automatically remove variations between sensors, eliminating the need for more expensive manual adjustments.
Leveraging ADI's DigiTrim in-package trim technology, the device offers high DC accuracy at a low price.
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A serial data interface allows gain to be digitally programmed over a wide range from 70 to 1280.
To ensure the lowest drift and highest level of accuracy, the device offers extremely low maximum input offset voltage of 10uV, very low maximum input offset voltage drift of 65nV/C, and very high DC and AC CMRR (common-mode rejection ratio) of 94dB minimum.
Output clamping can be set by an external reference, allowing the AD8556 to drive lower voltage ADCs (analogue-to-digital convertors), such as ADI's AD7476, safely and accurately.
The AD8556 is available now, operates from single-supply voltages of 2.7 to 5.5V, and is packaged in either a space-saving 4 x 4mm LFCSP or 8-lead SOIC.
The LFCSP version is priced at $2.89 per unit in 1000-piece quantities, and the SOIC version is priced at $2.85 per unit in 1000-piece quantities.
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