ADI LTC1563-2IGN#PBF

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.

• 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 FilterCADTM
• 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

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