DescriptionThe LT1568 is a dual second order matched building blockwhich is useful in a variety of ways for different applica-tions. Each individual filter block uses two very low noise(1.5nV/ Hz input voltage noise) operational amplifiersand an inverter op amp output (useful in applicationsrequiring differential outputs or an output with phase reversal).The LT1568, with a few passive components, can be usedto design various filter functions (lowpass, bandpass,highpass, notch or allpass). One of the features of thisdevice is its repeatable AC performance from part-to-part.This is achieved by trimming all the internal capacitors toa better than 1% tolerance and by trimming the gainbandwidth product (GBW) of all the internal op amps.Thus, any small error caused by the finite speed of theLT1568 active circuitry is highly predictable from part-to- part.Application ExamplesThe LT1568 is extremely versatile due in part to its genericinternal architecture. The values of the external resistors feature to note is that the perfor-mance of the LT1568 is precisely repeatable from device-to-device, making it possible to manufacture filters involume without the need for costly production trimming.Device DescriptionThe LT1568 is a dual second order matched building blockwhich is useful in a variety of ways for different applica-tions. Each individual filter block uses two very low noise(1.5nV/ Hz input voltage noise) operational amplifiersand an inverter op amp output (useful in applicationsrequiring differential outputs or an output with phase reversal).The LT1568, with a few passive components, can be usedto design various filter functions (lowpass, bandpass,highpass, notch or allpass). One of the features of thisdevice is its repeatable AC performance from part-to-part.This is achieved by trimming all the internal capacitors toa better than 1% tolerance and by trimming the gainbandwidth product (GBW) of all the internal op amps.Thus, any small error caused by the finite speed of advertisementA Precision Active Filter Block w