Monday, November 05, 2007

Op amps enable low-power instrumentation

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Dual and quad CMOS op amps rival the best bipolar amplifiers in DC performance while achieving picoampere input bias currents

Linear Technology reckons its newest CMOS op amps push the limits of precision with 3.5MHz gain-bandwidth product and less than 90uV offset over the entire -40 to +125C temperature range. Featuring rail-to-rail input and output stages, the dual LTC6081 and quad LTC6082 achieve low frequency noise of just 1.3uV peak-peak and low input bias current of 1pA maximum at 25C, making these amplifiers ideal for precision instrumentation.

The LTC6081 and LTC6082 only consume 330uA per amplifier and offer an optional shutdown feature, allowing the current to be reduced to 0.5uA per amplifier, which provides further savings in battery power.

In addition, the amplifiers have an uncompromising gain bandwidth of 3.5MHz and a slew rate of 1V/us.

The LTC6081 and LTC6082 offer a CMRR of 105dB and PSSR of 90dB, and the large signal voltage gain of 120dB ensures gain linearity.

'The LTC6081 and LTC6082 rival the best bipolar amplifiers in DC performance while achieving picoampere input bias currents', says Brian Black, Product Marketing Manager.

'Combining this precision with an excellent speed-power ratio opens up new possibilities for designers of low-power instrumentation systems'.

The LTC6081 dual is offered in the 8-pin MSOP and tiny 3 x 3mm DFN package.

The LTC6082 quad is available in the 16-pin SSOP and 5 x 3mm DFN packages.

1000-piece pricing starts at US $1.74 each for the LTC6081 dual and US $2.97 each for the LTC6082 quad. Request a free brochure from Linear Technology Corp....

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