LTC1563 - Active RC, 4th Order Lowpass Filter Family

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

LTC1563 Typical Application
LTC1563 Typical Application

Description

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).

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC1563-2CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1563-2CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1563-2IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC1563-2IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC1563-3CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1563-3CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1563-3IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC1563-3IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC1563 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1563-2CGN#PBF SSOP-16 C $2.35 $1.95 Yes
LTC1563-2CGN#TRPBF SSOP-16 C $2.01 Yes
LTC1563-2IGN#PBF SSOP-16 I $2.60 $2.15 Yes
LTC1563-2IGN#TRPBF SSOP-16 I $2.21 Yes
LTC1563-3CGN#PBF SSOP-16 C $2.35 $1.95 Yes
LTC1563-3CGN#TRPBF SSOP-16 C $2.01 Yes
LTC1563-3IGN#PBF SSOP-16 I $2.60 $2.15 Yes
LTC1563-3IGN#TRPBF SSOP-16 I $2.21 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC338B-A LTC1563-2CGN Demo Board | Universal Lowpass Filter $50.00
DC338B-B LTC1563-3CGN Demo Board | Universal Lowpass Filter $50.00
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Click here to view our complete list of demo boards

Applications

  • Discrete RC Active Filters and Modules
  • Antialiasing Filters
  • Smoothing or Reconstruction Filters
  • Linear Phase Filtering for Data Communication
  • Phase Locked Loops

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1563-2
LTC1563-3

Technical Support