LTC6957 - Low Phase Noise, Dual Output Buffer/Driver/Logic Converter

Features

  • 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

Typical Application

LTC6957-1 Typical Application
LTC6957-1 Typical Application

Description

The LTC®6957-1/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.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC6957HMS-1#PBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-1#TRPBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-2#PBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-2#TRPBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-3#PBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-3#TRPBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-4#PBF MS-12 MS H 05-08-1668 Yes
LTC6957HMS-4#TRPBF MS-12 MS H 05-08-1668 Yes
LTC6957IDD-1#PBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-1#TRPBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-2#PBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-2#TRPBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-3#PBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-3#TRPBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-4#PBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IDD-4#TRPBF 3x3 DFN-12 DD I 05-08-1725 Yes
LTC6957IMS-1#PBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-1#TRPBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-2#PBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-2#TRPBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-3#PBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-3#TRPBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-4#PBF MS-12 MS I 05-08-1668 Yes
LTC6957IMS-4#TRPBF MS-12 MS I 05-08-1668 Yes


LTC6957-1 Package Drawing
LTC6957-1 Package Drawing
LTC6957-1 Package Drawing
LTC6957-1 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
LTC6957HMS-1#PBF MS-12 H $5.91 $4.14 Yes
LTC6957HMS-1#TRPBF MS-12 H $4.20 Yes
LTC6957HMS-2#PBF MS-12 H $5.91 $4.14 Yes
LTC6957HMS-2#TRPBF MS-12 H $4.20 Yes
LTC6957HMS-3#PBF MS-12 H $5.91 $4.14 Yes
LTC6957HMS-3#TRPBF MS-12 H $4.20 Yes
LTC6957HMS-4#PBF MS-12 H $5.91 $4.14 Yes
LTC6957HMS-4#TRPBF MS-12 H $4.20 Yes
LTC6957IDD-1#PBF 3x3 DFN-12 I $5.14 $3.60 Yes
LTC6957IDD-1#TRPBF 3x3 DFN-12 I $3.66 Yes
LTC6957IDD-2#PBF 3x3 DFN-12 I $5.14 $3.60 Yes
LTC6957IDD-2#TRPBF 3x3 DFN-12 I $3.66 Yes
LTC6957IDD-3#PBF 3x3 DFN-12 I $5.14 $3.60 Yes
LTC6957IDD-3#TRPBF 3x3 DFN-12 I $3.66 Yes
LTC6957IDD-4#PBF 3x3 DFN-12 I $5.14 $3.60 Yes
LTC6957IDD-4#TRPBF 3x3 DFN-12 I $3.66 Yes
LTC6957IMS-1#PBF MS-12 I $5.14 $3.60 Yes
LTC6957IMS-1#TRPBF MS-12 I $3.66 Yes
LTC6957IMS-2#PBF MS-12 I $5.14 $3.60 Yes
LTC6957IMS-2#TRPBF MS-12 I $3.66 Yes
LTC6957IMS-3#PBF MS-12 I $5.14 $3.60 Yes
LTC6957IMS-3#TRPBF MS-12 I $3.66 Yes
LTC6957IMS-4#PBF MS-12 I $5.14 $3.60 Yes
LTC6957IMS-4#TRPBF MS-12 I $3.66 Yes
Buy NowRequest Samples
* 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
DC1765A-A LTC6957HMS-1 Demo Board | Low Phase Noise, Dual Output Buffer/Driver/Logic Converter with LVPECL Outputs $75.00
DC1765A-B LTC6957HMS-2 Demo Board | Low Phase Noise, Dual Output Buffer/Driver/Logic Converter with LVDS Outputs $75.00
DC1766A-A LTC6957HMS-3 Demoboard:Low Phase Noise, Dual Output Buffer/Driver/Logic Converter with In-Phase CMOS Outputs $75.00
DC1766A-B LTC6957HMS-4 Demoboard:Low Phase Noise, Dual Output Buffer/Driver/Logic Converter with Complementary CMOS Outputs $75.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • 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

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice IV - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support