Auto-zero amplifiers ease the design of high-precision circuits

angelweishan

Auto-zero amplifiers ease the design of high-precision circuits

It is free!  Also you can download it from my post at the expense of your "money".


http://focus.ti.com/lit/an/slyt204/slyt204.pdf

By Thomas Kugelstadt (Email: tk@ti.com)
Senior Systems Engineer, Industrial Systems

A wide variety of electronic applications deal with the conditioning of small input signals. These systems require signal paths with very low offset voltage and low offset voltage drift over time and temperature. With standard linear components, the only way to achieve this is to use system-level auto-calibration. However, adding autocalibration requires more complicated hardware and software and can slow down time to market for new products.

The alternative is to use components with low offset and low drift. The amplifiers with by far the lowest offset and drift available are the auto-zero amplifiers (AZAs). These amplifiers achieve high dc precision through a continuously running calibration mechanism that is implemented on-chip. With a typical input offset of 1 μV, a temperature-related drift of 20 nV/ºC, and a long-term drift of 20 nV/month, these amplifiers satisfy even the highest requirements of dc accuracy.

wxwttf

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sjxu007

thanks

rogerqin

thanks

kuoyu2006

good~~

liushangpiao

good ..thx

asueee1

good note

sunyu

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sunyu

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sunyukm

kankan