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DC1705C-A - LTC6946-1 Demo Board| Ultralow Noise and Spurious 373MHz to 3.74GHz Integer-N Synthesizer with Integrated VCO (Req DC590 or DC2026)

DC1705C features the LTC®6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support. There are three versions of the DC1705C, one for each version of the LTC6946. The DC1705C-A contains the LTC6946-1, the DC1705C-B incorporates the LTC6946-2 and DC1705C-C uses the LTC6946-3.

DC1705C - Schematic


Companion Demo Boards

DC2026C - Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform
DC2429A - LT3042 Low Noise PLL/VCO Power Supply Board with Onboard 100MHz Reference Frequency
DC590B - Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards


QuikEval System

The QuikEval system is a USB-based product demonstration and data acquisition system that allows users to quickly evaluate the performance of Linear Technology products. The system consists of a USB Data Acquisition Controller board (DC590B) that connects to individual daughter cards for specific Linear Technology products.

Click here to download QuikEval


Linear Technology PLLWizard is used to communicate with the LTC6945 and LTC6946 synthesizers. It uses the DC590 controller to translate between USB and SPI-compatible serial communications formats. It also includes advanced PLL design and simulation capabilities. You may use it to:

  • Recommend part parameters based on your frequency plan
  • Design noise-optimized loop filters
  • Simulate loop frequency response and stability
  • Simulate VCO and Reference source noise
  • Simulate output noise characterisics and statistics

Click here to download PLLWizard Software Design Tool


Linduino is an Arduino compatible platform for developing and distributing firmware libraries and code for SPI and I²C-compatible integrated circuits. The Linduino One board interfaces to more than 300 QuikEval demonstration cards, supporting a variety of product types including analog-to-digital converters (ADCs)digital-to-analog converters (DACs)power monitors, and more. Firmware libraries for individual devices are written in C and designed to be portable to a wide variety of processors and microcontrollers. Each library has a demonstration program that can be uploaded to the Linduino One platform to allow the circuit and software to be quickly and easily verified.

Click here for more information on Linduino