DC1795A - LTC6950 Demo Board| Integer-N PLL with 5 outputs (requires DC590 or DC2026)
Demonstration circuit 1795A features the LTC®6950, a 1.4GHz low phase noise, low jitter PLL with clock distribution. For ease of use, the DC1795A comes installed with a 100MHz reference and a 1GHz VCSO, voltage controlled SAW oscillator with sine wave output. All differential inputs and outputs have 0.5" spaced SMA connectors. The DC1795A has four AC coupled LVPECL outputs with 50Ω transmission lines making them suitable to drive 50Ω impedance instruments. The LVDS/CMOS output is DC coupled. The LTC6950’s EZSync™ function is made available via a turret and an SMA connector.
Companion Demo Boards
DC2026C - Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform
DC590B - Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards
Software
Linduino
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.
ClockWizard
ClockWizard builds on PLLWizard and simplifies the evaluation process of the LTC6950. Besides the ability to design the loop filter components and predict the resulting phase noise and jitter performance, ClockWizard introduces a scope plot which shows the LTC6950 outputs in the time domain and illustrates the phase relationships between the outputs based on their respective EZSync settings. It also controls the LTC6950 demoboard via the DC590 or DC2026. Furthermore, you may it use to:
- Show PLL frequency response and stability
- Simulate output phase noise and jitter
- Simulate output clock phase relationships based on EZSync settings
- Read and write all device registers
- Import and export VCO, reference and output noise data