The LTC1563-2/LTC1563-3 are a family of extremely easy-to-use, active RC lowpass filters with rail-to-rail inputs and outputs and low DC offset suitable for systems with a resolution of up to 16 bits. The LTC1563-2, with a single resistor value, gives a unity-gain Butterworth response. The LTC1563-3, with a single resistor value, gives a unity-gain Bessel response. The proprietary architecture of these parts allows for a simple resistor calculation: R = 10k (256kHz/fC); fC = Cutoff Frequency where fC is the desired cutoff frequency. For many applications, this formula is all that is needed to design a filter. By simply utilizing different valued resistors, gain and other responses are achieved. The LTC1563-X features a low power mode, for the lower frequency applications, where the supply current is reduced by an order of magnitude and a near zero power shutdown mode. The LTC1563-Xs are available in the narrow SSOP-16 package (Same footprint as an SO-8 package). Applications * Discrete RC Active Filters and Modules * Antialiasing Filters * Smoothing or Reconstruction Filters * Linear Phase Filtering for Data Communication * Phase Locked Loops * Extremely Easy to Use—A Single Resistor Value Sets the Cutoff Frequency (256Hz < fC < 256kHz) * Extremely Flexible—Different Resistor Values Allow Arbitrary Transfer Functions with or without Gain (256Hz < fC < 256kHz) * Supports Cutoff Frequencies Up to 360kHz Using FilterCAD™ * LTC1563-2: Unity-Gain Butterworth Response Uses a Single Resistor Value, Different Resistor Values Allow Other Responses with or without Gain * LTC1563-3: Unity-Gain Bessel Response Uses a Single Resistor Value, Different Resistor Values Allow Other Responses with or without Gain * Rail-to-Rail Input and Output Voltages * Operates from a Single 3V (2.7V Min) to ±5V Supply * Low Noise: 36µVRMS for fC = 25.6kHz, 60µVRMS for fC = 256kHz * fC Accuracy < ±2% (Typ) * DC Offset < 1mV * Cascadable to Form 8th Order Lowpass Filters * Available in Narrow SSOP-16 Package https://elecena.pl/product/1018007/active-rc-4th-order-lowpass-filter-family 2010-01-30 https://elecena.pl/product/1018007/active-rc-4th-order-lowpass-filter-family 2016-04-27 https://elecena.pl/product/1018007/active-rc-4th-order-lowpass-filter-family 2025-01-20