DC2248A-B - LTC6951-1 Demo | 5-Output Integer-N PLL with Integrated VCO, Output Range: 2.1MHz to 2.7GHz (requires DC590 or DC2026)
Demonstration circuit 2248A features the LTC®6951, an Ultralow Jitter Multi-Output Clock Synthesizer with Integrated VCO.
For ease of use, the DC2248A is powered from a single 6V supply and comes installed with a 100MHz reference. Direct access to the LTC6951 5V, 3.3V and the reference supplies is possible by removing jumpers. For evaluation of the LTC6951 with other references, the DC2248A can be modified to accommodate different onboard or external components.
Companion Demo Boards
DC2430A - DC2430A Linduino SPI 1:8 Expander Demonstration Board (DC2026 Included)
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
LTC6951Wizard
The LTC6951Wizard software provides appropriate LTC6951 PLL settings and loop filter component values with a click of a button, and accurately predicts the individual output’s phase noise and jitter. Besides performance simulation, the LTC6951Wizard GUI features a scope plot that simulates time domain results of the LTC6951 outputs based on the clock divider, delay and synchronization settings, simplifying the design process and assisting in the circuit debugging phase.
The LTC6951Wizard GUI is also used to communicate with the LTC6951 situated on the DC2248, the demo board of the LTC6951. It uses the DC590 (or the DC2026 emulating the DC590) to communicate with the PC.
The following list summarizes its uses:
- Read and write all device registers
- Determine each register’s contents
- Recommend part parameters based on the given 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
- Simulate output timing and delays
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.
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.