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Amplifiers/Converters  

Op amps offer 1.8V to 5.5V supply range

Posted: 13 Sep 2011     Print Version  Bookmark and Share

Keywords:op amps  low-voltage  battery-powered 

Texas Instruments Inc. (TI) expands its 1.8V, rail-to-rail input and output, general purpose operational amplifier (op amp) portfolio with a line of op amps for low-voltage, battery-powered, cost-sensitive industrial, consumer and medical applications.

According to the company, the device uses up to 40 per cent less quiescent current compared to its closest competitor to extend the battery life of smoke and carbon monoxide detectors, portable media players, laptops, computer peripherals and blood glucose meters.

Low maximum quiescent current of 190µA per channel and low noise of 14nV/rtHz at 1kHz of OPA2314 enables low-level signal amplification while maintaining a high signal-to-noise ratio and reducing system power consumption.

TheOPA2314 op amp operates from 1.8V to 5.5V with rail-to-rail input and output swings. This extends the dynamic input and output range of the amplifier to maintain or improve the signal chain's signal-to-noise ratio. Its 3MHz gain bandwidth provides high sensitivity to enable high-resolution systems across a wide frequency range. It also offers 0.2pA input bias current to support high source impedance applications.

TI offers a variety of free tools and support to speed development with the OPA2314, including:

 • A universal evaluation module (EVM) that simplifies evaluation by allowing many different circuits to be constructed easily and quickly. The EVM is available today for Rs.224.22 ($5).
 • A SPICE model in TINA-TI 9.1, a SPICE-based analogue simulation programme. Download TINA-TI 9.1 at www.ti.com/tina-ti-download-pr.
 •  Software for analysis, application and calculation utilities, including Analog Filter Designer, FilterPro, and calculators for decibel, frequency/wavelength and op amp gain stage.





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