1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar

DC1959A-B - LTC6948-2 Demo Board | Ultralow Noise and Spurious 513MHz to 4.91GHz Frac-N Synthesizer with Integrated VCO, (Req DC590)

Demonstration circuit 1959A features the LTC6948, an Ultralow Noise and Spurious Fractional-N Synthesizer with Integrated VCO. There are four options of the DC1959A, one for each version of the LTC6948. Table 1 summarizes the available DC1959A options.

DC1959A - 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



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


Linear Technology FracNWizard is used to communicate with the LTC6947 and LTC6948 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 characteristics and statistics
  • Import and export VCO, reference and output noise data

Click Here to Download FracNWizard