LTC1563 - Active RC, 4th Order Lowpass Filter Family
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
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).
Features- 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
Typical Application
 | Applications- Discrete RC Active Filters and Modules
- Antialiasing Filters
- Smoothing or Reconstruction Filters
- Linear Phase Filtering for Data Communication
- Phase Locked Loops
Packaging |
Order Information| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|
| LTC1563-2CGN#PBF | SSOP-16 | C | $2.35 | $1.95 |
| LTC1563-2CGN#TRPBF | SSOP-16 | C | | $2.01 |
| LTC1563-2IGN#PBF | SSOP-16 | I | $2.60 | $2.15 |
| LTC1563-2IGN#TRPBF | SSOP-16 | I | | $2.21 |
| LTC1563-3CGN#PBF | SSOP-16 | C | $2.35 | $1.95 |
| LTC1563-3CGN#TRPBF | SSOP-16 | C | | $2.01 |
| LTC1563-3IGN#PBF | SSOP-16 | I | $2.60 | $2.15 |
| LTC1563-3IGN#TRPBF | SSOP-16 | I | | $2.21 |
Demo Boards
| Part Number | Description | Price |
|---|
| DC338B-A | LTC1563-2CGN Demo Board | Universal Lowpass Filter | $50.00 |
| DC338B-B | LTC1563-3CGN Demo Board | Universal Lowpass Filter | $50.00 |
DatasheetDesign NoteReliability DataLT JournalCAD Symbol | Related Products |
