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Amplifiers/Converters??

New level-shifting difference amplifier provides high accuracy

Posted: 10 Oct 2005 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? difference amplifier? burr-brown? ina159?

Texas Instruments Inc. (TI) announced a level-shifting difference amplifier from its Burr-Brown product line. Featuring a gain of 0.2, the INA159 is designed to interface 10V signals to single supply ADCs, especially those with 4.096V or 5V references.

When combined with an economical single supply ADC, the INA159 provides a high accuracy, easy-to-use, cost competitive solution compared to a 10V input ADC. Prior to the introduction of the INA159, said TI, functionality was achieved using complicated and expensive precision resistor networks and a high performance op amp. The amplifier in the INA159 is suited for driving up to 14bit ADCs, such as TI's ADS8324, with its 1.5MHz bandwidth and 15V/?s slew rate, along with low output impedance. A split reference connection simplifies biasing at one half supply or reference and eliminates the need for an additional op amp, added the company.

Single supply voltage range is from 2.7V to 5.5V. The device features low offset (500?V maximum), high gain accuracy (0.024 percent maximum), low quiescent current (1.5mA maximum) and specification over a -40C to 125C temperature range.

Targeting data acquisition, industrial process control and test equipment applications, the INA159 is available in a space-saving MSOP8 package and has a suggested resale pricing starting at $1.59 in 1,000-piece quantities.



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