Features and Benefits

  • Low Phase Noise Buffer/Driver
  • Optimized Conversion of Sine Wave Signals to Logic Levels
  • Three Logic Output Types Available
    • LVPECL
    • LVDS
    • CMOS
  • Additive Jitter 45fsRMS (LTC6957-1)
  • Frequency Range Up to 300MHz
  • 3.15V to 3.45V Supply Operation
  • Low Skew 3ps Typical
  • Fully Specified from –40°C to 125°C
  • 12-Lead MSOP and 3mm × 3mm DFN Packages

Product Details

The LTC6957-1/LTC6957-2/LTC6957-3/LTC6957-4 is a family of very low phase noise, dual output AC signal buffer/driver/logic level translators. The input signal can be a sine wave or any logic level (≤2VP-P). There are four members of the family that differ in their output logic signal type as follows:

LTC6957-1: LVPECL Logic Outputs

LTC6957-2: LVDS Logic Outputs

LTC6957-3: CMOS Logic, In-Phase Outputs

LTC6957-4: CMOS Logic, Complementary Outputs

The LTC6957 will buffer and distribute any logic signal with minimal additive noise, however, the part really excels at translating sine wave signals to logic levels. The early amplifier stages have selectable lowpass filtering to minimize the noise while still amplifying the signal to increase its slew rate. This input stage filtering/noise limiting is especially helpful in delivering the lowest possible phase noise signal with slow slewing input signals such as a typical 10MHz sine wave system reference.


  • System Reference Frequency Distribution
  • High Speed ADC, DAC, DDS Clock Driver
  • Military and Secure Radio
  • Low Noise Timing Trigger
  • Broadband Wireless Transceiver
  • High Speed Data Acquisition
  • Medical Imaging
  • Test and Measurement

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (5)

Tools & Simulations

Product Recommendations

LTC6957-1 Companion Parts

Recommended ADCs

Recommended Related 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.

PCN-PDN Information

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.