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LTC1563-3IGN Datasheet(PDF) 1 Page - Linear Technology |
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LTC1563-3IGN Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LTC1563-2/LTC1563-3 156323fa ■ 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 TM ■ 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: 36 µVRMS 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 The LTC ®1563-2/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 appli- cations, 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 re- duced 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). ■ Discrete RC Active Filter Replacement ■ Antialiasing Filters ■ Smoothing or Reconstruction Filters ■ Linear Phase Filtering for Data Communication ■ Phase Locked Loops Single 3.3V, 256Hz to 256kHz Butterworth Lowpass Filter Active RC, 4th Order Lowpass Filter Family , LTC and LT are registered trademarks of Linear Technology Corporation. 0.1 µF 3.3V VOUT VIN R R R R R R fC = 256kHz 1563 TA01 LTC1563-2 0.1 µF 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 LP SA NC INVA NC LPA AGND V– V+ LPB NC INVB NC SB NC EN 10k R () FREQUENCY (Hz) 10k 1k 100 10 0 –10 –20 –30 –40 –50 –60 –70 –80 100k 1M 1563 TA02 R = 10M fC = 256Hz R = 10k fC = 256kHz Frequency Response APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO FilterCAD is trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. |
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