The AD644 is a pair of matched high speed monolithic FET inputoperational amplifiers fabricated with the most advanced bipolar,JFET and laser-trimming technologies. The AD644 offersmatched bias currents that are significantly lower than currentlyavailable monolithic dual BiFET operational amplifiers: 35 pAmax, matched to 25 pA for the AD644K and L, 75 pA maxmatched to 35 pA for the AD644J and S. In addition, the offsetvoltage is laser trimmed to less than 0.5 mV, and matched to0.25 mV for the AD644L, 1.0 mV and matched to 0.5 mV forthe AD644K, utilizing Analog Devices’ laser-wafer trimming (LWT) process.
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