Pico Communications E-15 manual High Speed Analog to Digital Converters

Page 18

18

High Speed Analog to Digital Converters

The Pico E-15 features 2 high speed analog to digital converters. The converters are optimized for high-frequency, high-performance, low-power, low-noise operation. The converters have integrated DC blocking capacitors, and thus, cannot be used on very low frequency signals. The ADC should be driven by a source with an impedance of 50 ohms.

To ensure accuracy at high speeds, the low-jitter 125 MHz reference clock must be used. The converters may be tuned to different applications. For example: a lower termination impedance may be traded for more sensitivity. A wider high frequency input range may be traded for less high frequency noise rejection. Contact Pico Computing with your application requirements.

The data returning from the ADCs must be sampled on the rising edge of the appropriate clock return pin. Even when the ADCs are clocked from the same source, they will be running out of sync because of the duty cycle stabilizer (which provides greater resolution). The Pico E-15 can be special ordered with the duty cycle stabilizer perminately disabled.

Pico E-15 Hardware Reference

www.picocomputing.com

Pico Computing

 

(206) 283-2178

150 Nickerson Street. Suite 311

 

 

Seattle, WA 98109

Image 18
Contents Pico E-15 Release For Hardware Revision DPage Product Overview Pico E-15 Quick Reference Datasheet IO ConnectivityStandard Part Numbers Standard Part NumberMilitary version is available which includes System Architecture Pico E-15 Electrical Specification Minimum Nominal MaximumField Programmable Gate Array PowerPC Processor PPC405x3 Processor IntroductionCpld TurboLoader Cpld Resources Xilinx Cpld WebsiteFlash Memory RAM DDR2 Sdram MemoryRAM Timing and Parameter Information Parameter Value EDK Value 133 MHz 333 MHzTemperature Sensor Electrical Specifications Minimum Nominal MaximumSleep Controller Tri-Mode Ethernet Interface Ethernet ResourcesDigital Peripheral Interface HI-ZHigh Speed Analog to Digital Converters VDC Low pass filter range is customizable via special order High Speed Digital to Analog Converters Page Video Digitizer Video Digitizer External Connections Svideo ModeVideo Digitizer External Connections Composite Mode Video Digitizer Resources TVP5150AM1 HomepageElectrical Specifications DC Minimum Nominal Maximum CardBus / Digital Bus InterfacePcmcia Interface Resources Pcmcia Website PCI SIG Website Jtag Debug Interface DeviceInstruction register bit length PSoC Debug Interface Appendix a Peripheral I/O Connector Information Connector InformationPeripheral I/O Connector Pinout Peripheral Connector Drawing Appendix B CardBus Connector Information FCICardBus Interface Schematic CardBus Connector Pinout PcicparPCICAD17 Appendix C Fpga Pinout Fpga PinoutCAD0 AA4 ETHERTX1 FLASHD11 RAMDQ5 Vdcfid Appendix D Cpld Pinout Cpld PinoutAppendix E PSoC Pinout PSoC PinoutAppendix F Standard Part Number Listing Standard Part Number ListingDevice Part Number Website Appendix G Errata Appendix H Fpga Performance Enhancements Revision History Legal Notices