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Instrumentation Amplifier Includes Filters to Reduce RF Interference

Amplifiers, Filters / Ferrites, Markets, Medical, Products, Technologies, Test Instrumentation

The new INA333 is a is a zero-drift instrumentation amplifier from Texas Instruments with input bias current of 200 pA and quiescent current of 75 µA. Offset voltage is 25 µV, and offset drift is 0.1 µV/°C. The INA333 yields an input voltage noise of 50 nV/rt-Hz with a proprietary switched capacitor notch filter. The MSOP-8-packaged amplifier has 3 op-amp architecture and operates at 1.8 V. Special filters have been integrated in series with the inputs of the INA333 to reduce radio frequency (RF) interference. This feature can dramatically reduce susceptibility to RF-induced offset voltage variations, which can be a critical advantage in applications that require DC stability, such as weigh scales. The INA33 is well suited to applications such as portable medical equipment, handheld instrumentation, weigh scales, and data acquisition. Learn more at the TI website.Filtering plays a vital role in achieving EMC. Whether you’re posting a question, sharing a dilemma, or voicing your opinion, try the new Interference Technology Filters Forum.

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Interference Technology

Established in 1970, Interference Technology helps EMI/EMC engineers find solutions to their various testing, design, application and regulatory issues by publishing articles, news and other practical content. We help suppliers in these areas to find the right customers for their components, materials, test equipment and services through a wide range of marketing services, including lead generation, branding, market research and events. The publication is available in various printed and electronic media formats, with readers in over 60 countries. We also publish issues in local languages in China, Japan and Europe.

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