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Op amp combines high speed, low DC errors

Posted: 19 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:op amp? communications? amplifier?

LMH6629 op amp

From National Semiconductor comes a high-speed op amp claimed to deliver the lowest noise (0.69nV/sqrt Hz) with -3dB bandwidth of 900MHz at a gain of 10.

The PowerWise LMH6629 also provides low input current noise (2.6pA/sqrt Hz) and second and third harmonic distortion (f = 1MHz) performance of -90dBc and -94dBc, respectively. The op amp's low input noise, low distortion and high speed combined with low DC errors780?V input offset voltage max at 25C and 0.45?V/C of TCVosenable precision operation in both AC- and DC-coupled applications.

The LMH6629's input common-mode range extends below ground and the output swings to within 0.8V of either rail with a linear output current of greater than 250mA. The PowerWise op amp consumes 15.5mA and features a supply voltage range from 2.7V to 5.5V. Its user selectable internal compensation eliminates the external compensation components and additional design time required with other amplifiers. With the LMH6629, designers can set a minimum gain of 4 or 10 by pulling the minimum gain select pin low or high.

Applications include 16bit systems for communications, test and measurement, medical imaging, industrial, and light detecting and ranging applications.

Pricing is $1.88 each in 1,000 units in an 8-pin LLP package.

- Ismini Scouras

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