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LNA operates from 2.7-36V

Posted: 26 Sep 2011 ?? ?Print Version ?Bookmark and Share

Keywords:operational amplifier? automotive? low-noise?

Texas Instruments Inc. (TI) has unveiled its 36V, single-supply, low-noise operational amplifiers (op amp) that operate from 2.7-36V. The OPA171-Q1 offers high-precision performance in a cost-effective, low-power device that targets automotive applications, TI stated.

The OPA171-Q1 offers features designed to enhance overall system design stability such as the ability to handle input signals beyond the supply rails without causing output phase reversal. The op amp remains stable when exposed to capacitive loads up to 300pF, or when the input operates 100mV below the negative rail. It also operates normally within 2V of the top rail.

The op amp has a dynamic input voltage range of 2.7V to 36V or 1.35V to 18V that allows for greater design versatility across varying supply rails, the company said. The OPA171-Q1 provides low offset of up to 1.8mV, typical drift of 0.3uV/C and wide gain bandwidth of 3Mhz. TI added that the device has a low quiescent current of 475uA that enables efficient battery-powered operation.

The OPA171-Q1, available from TI and its authorized distributors, is offered in a 5-pin SOT-23 package and is qualified to automotive grade. The op amp is priced at $0.47 in quantities of 1,000. The SOT-553 micro package, which can be also be qualified to automotive grade, uses 50 percent less board space than competing products, enabling designers to develop smaller modules, TI noted.

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