AD9911DDS
Aus LaborWiki
| AD9911DDS Release status: experimental [box doku] | |
|---|---|
| Description | Direct Digital Synthesizer |
| Author(s) | siro |
| Last Version | 0.1 |
| Platform | * |
| License | GPL |
*TODO upload pictures*
AD9911DDS
This project describes the AD9911 Direct Digital Synthesizer. It is capable of generating a sine-wave between 250Mhz and >1Hz. The created evaluation unit is descripted here.
The Hardware
*TODO upload files*
The Software
I've created a simple programm that runs on teensy 2.0 (ATMEGA32U4). It should run on any ATmega, just change the I/O ports.
Timings are not critical, as the ATmega is much slower than the maximum I/O updaterate of the AD9911.
*TODO upload files*
Changes applied to Hardware
- pull PWR_DWN_CTL low
- pull SDIO_3 low
- terminate IDAC with 50 Ohms agains AVCC
- terminate !IDAC with 50 Ohms agains AVCC
- include a 5th order low pass filter
- include a transformer
- series resistance for SPI interface
Results
*TODO upload pictures*