Linear Technology: DC890B High Speed (up to 250Mbps, CMOS/LVDS) USB Data Collection Board

Kit Overview

The Demonstration circuit DC890BDC890B along with PScope software provides a USB based Windows PC hosted digital data acquisition system supporting CMOS/LVDS output ADCs up to 250Msps. The DC890B must be powered from an external 6VDC ±0.5VDC power supply when operating in LVDS mode. When operating in CMOS mode, the external power supply is optional.

The Linear Technology supplied PScope evaluation software automatically detects the DC890BDC890B and can also detect many of the standard ADC demonstration circuits boards. The DC890B will not enable LVDS mode unless an external 6.0VDC power source is available.

This system provides for fast and easy performance evaluation of high speed ADCs. DC890BDC890B collects up to 256K word samples and then performs various analyses on the data including calculating SNR, SINAD, THD, SFDR and ENOB. The digitized input, an FFT of the collected data, the primitive wave of the sample set or an IFFT of modified frequency domain data is plotted to a display window to facilitate analyzing distortion products and sources.

The PScope System is a USB-based product demonstration and data acquisition system for use with Linear Technology’s high performance ADC's. The system consists of a USB Data Acquisition Controller board that connects to individual daughter cards for specific Linear Technology ADCs.

The software collects and analyzes data from the ADC in both the time and frequency domains and displays relevant parameters for the device being evaluated. The software also provides an automatic update feature to keep the software current with the latest set of device drivers.

Key Applications: Fast and easy performance evaluation of high speed ADCs