ADC First-TF

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I will introduce an electronic development based on a DDS, the AD9959 .

The latter has been used as part of the electronics of the repeater stations developed for REFIMEVE + project.

to the laboratory LPL for a research team working on a condensed atoms we developed an electronic -based multiple DDS ( AD9959 ) , see below :

Dress Project RF trap quadrupole based DDS

The objective of the developed electronics was to send the circular polarization RF with two antennas at a magnetic trap .

From an external clock signal , both channels must be in phase quadrature and then changed later manipulation of the PC . The outputs are programmable numerically (frequency, amplitude, phase ..) with a program written in LabWindows CVI .

The DDS is part of a series of specific components of Analog Device , this program only in serial (SPI) knowing that others DDS accept two modes: SPI and Parallel. The clock frequency is 500MHz and it can provide four output RF : DC- 200MHz . I will introduce the basic elements for the DDS program knowing that it can be applied to other DDS from the same family . Below doc of the AD9959 . ad9959.pdf

The DDS was programmed via a 16-bit microcontroller from TI MSP430F169 to the 8MHz clock : http://www.ti.com/lit/ds/symlink/msp430f1611.pdf .

The MSP430 programming environment IAR Workbench Embdedded downloaded from the Texas Instruments website . http://www.iar.com/Products/IAR-Embedded-Workbench/TI-MSP430

I recommend buying the MSP430USB debugging kit that allows MSP- FET430UIF a step by step debugging if you want to use this microcontroller family .

Of course many other microcontroller can beings used from the time that we have at least a SPI port. In this case a development with The AD9959 has been realized with Atmel microcontroller Arduino due, Microcontroller 32-bit ARM core @ 84MHz SPI clock and son loading 4wires .