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  2. Analog Functions
  3. Filters
  4. Low-Pass Filters
  5. LTC1569-6


Features and Benefits

  • One External R Sets Cutoff Frequency
  • Root Raised Cosine Response
  • 3mA Supply Current with a Single 3V Supply
  • Up to 64kHz Cutoff on a Single 3V Supply
  • 10th Order, Linear Phase Filter in an SO-8
  • DC Accurate, VOS(MAX) = 5mV
  • Low Power Modes
  • Differential or Single-Ended Inputs
  • 80dB CMRR (DC)
  • 82dB Signal-to-Noise Ratio, VS = 5V
  • Operates from 3V to ±5V Supplies

Product Details

The LTC1569-6 is a 10th order lowpass filter featuring linear phase and a root raised cosine amplitude response. The high selectivity of the LTC1569-6 combined with its linear phase in the passband makes it suitable for filtering both in data communications and data acquisition systems. Furthermore, its root raised cosine response offers the optimum pulse shaping for PAM data communications. The filter attenuation is 50dB at 1.5 • fCUTOFF, 60dB at 2 • fCUTOFF, and in excess of 80dB at 6 • fCUTOFF. DC-accuracy-sensitive applications benefit from the 5mV maximum DC offset.

The LTC1569-6 sampled data filter does not require an external clock yet its cutoff frequency can be set with a single external resistor with a typical accuracy of 3.5% or better. The external resistor programs an internal oscillator whose frequency is divided by either 1, 4 or 16 prior to being applied to the filter network. Pin 5 determines the divider setting. Thus, up to three cutoff frequencies can be obtained for each external resistor value. Using various resistor values and divider settings, the cutoff frequency can be programmed over a range of six octaves. Alternatively, the cutoff frequency can be set with an external clock and the clock-to-cutoff frequency ratio is 64:1. The ratio of the internal sampling rate to the filter cutoff frequency is 128:1.

The LTC1569-6 is fully tested for a cutoff frequency of 64kHz with a single 3V supply.

The LTC1569-6 features power saving modes and it is available in an SO-8 surface mount package.


  • Data Communication Filters for 3V Operation
  • Linear Phase and Phase Matched Filters for I/Q Signal Processing
  • Pin Programmable Cutoff Frequency Lowpass Filters

Product Categories

Product Lifecycle icon-recommended Production

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Evaluation Kits (1)

Product Recommendations

LTC1569-6 Companion Parts

Recommended Suggested Oscillator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC1569CS8-6#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1569CS8-6#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1569IS8-6#PBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
LTC1569IS8-6#TRPBF Material Declaration Reliability Data 8-Lead SOIC (Narrow 0.15 Inch)
Wafer Fabrication Data R401 Reliability Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.