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Rail-to-rail op amps boast 180MHz at 1mA

Posted: 18 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:rail-to rail? operational amplifier? SiGe?

Linear Technology Corp. introduces the LTC6246, LTC6247 and LTC6248 operational amplifiers that use power-efficient SiGe process to achieve 180MHz gain-bandwidth product and 90V/?s slew rate using just 1mA maximum supply current per amplifier. These single-, dual- and quad- op amps also feature rail-to-rail inputs and outputs and 4.2nV/ Hz wideband noise.

These amplifiers were designed to provide the very best speed/power efficiency available in a rail-to-rail amplifier, but DC performance was not sacrificed to achieve it. Input offset voltage is specified at 500?V max and open loop gain is 45V/mV. Bias current cancellation is employed to achieve a maximum of 350nA input bias current over most of the input common mode voltage range, allowing these products to be used in many applications with high source resistance such as portable instrumentation and other battery-powered or heat-constrained precision systems.

This LTC6246 family is available in versions fully specified over the commercial (0C -70C), industrial (-40C to 85C) and high temperature (-40C to 125C) ranges. A shutdown feature reduces current consumption to 42?A in the SOT-23 6-lead single and MSOP-10 dual versions. The dual LTC6247 is also available in a 2mm x 2mm x 0.55mm package, as well as the industry-standard MSOP-8 and SOT-23 8-lead packages. The LTC6248 is available in a 16-lead MSOP package. Prices start at $1.39 each for the single, $1.95 each the dual, and $3.07 each for the quad in quantities of 1,000.

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