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  2. Analog Functions
  3. Filters
  4. Low-Pass Filters
  5. LTC1065


Features and Benefits

  • Clock-Tunable Cutoff Frequency
  • 1mV DC Offset (Typical)
  • 80dB CMR (Typical)
  • Internal or External Clock
  • 50µVRMS Clock Feedthrough
  • 100:1 Clock-to-Cutoff Frequency Ratio
  • 80µVRMS Total Wideband Noise
  • 0.004% Noise THD at 2VRMS Output Level
  • 50kHz Maximum Cutoff Frequency
  • Cascadable for Faster Roll-Off
  • Operates from ±2.375 to µ8V Power Supplies
  • Self-Clocking with 1 RC

Product Details

The LTC1065 is the first monolithic filter providing both clock-tunability with low DC output offset and over 12-bit DC accuracy. The frequency response of the LTC1065 closely approximates a 5th order Bessel polynomial. With appropriate PCB layout techniques the output DC offset is typically 1mV and is constant over a wide range of clock frequencies. With ±5V supplies and ±4V input voltage range, the CMR of the device is typically 80dB.

The filter cutoff frequency is controlled either by an internal or external clock. The clock-to-cutoff frequency ratio is 100:1. The on-board clock is nearly power supply independent and it is programmed via an external RC. The 50µVRMS clock feedthrough of the device is considerably lower than other existing monolithic filters.

The LTC1065 wideband noise is 80µVRMS and it can process large AC input signals with low distortion. With ±7.5V supplies, for instance, the filter handles up to 4VRMS (94dB S/N ratio) while the standard 1kHz THD is below 0.005%; 87dB dynamic range (S/N THD) is obtained with input levels between 2VRMS and 2.5VRMS.

The LTC1065 is available in 8-pin miniDIP and 16-pin SOL. For a Butterworth response, see LTC1063 data sheet. The LTC1065 is pin compatible with the LTC1063.


  • Strain Gauge Amplifiers
  • Anti-Aliasing Filters
  • Low Level Filtering
  • Digital Voltmeters
  • Smoothing Filters
  • Reconstruction Filters

Product Categories

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Product Recommendations

LTC1065 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
LTC1065CN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LTC1065CSW#PBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
LTC1065CSW#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
LTC1065IN8#PBF Material Declaration Reliability Data 8-Lead PDIP (Narrow 0.3 Inch)
LTC1065ISW#PBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
LTC1065ISW#TRPBF Material Declaration Reliability Data 16-Lead SOIC (Wide 0.3 Inch)
Wafer Fabrication Data R042 Reliability Data

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