KCC Quizzes AQQ303 about the radius of a circle
1. Quote of the month: "When I die, I want to die like my grandfather who died peacefully in his sleep. Not screaming like all the passengers in his car" - Will Rogers
2. Quiz AQQ304 about finding the radius of a circle
Good luck, and try to be
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August Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Important: Read the blog first . The quiz questions are all based on the content of the blog:
Stay in the loop and win! Read the blog Current Output Driving Industrial Loops , then take our quick five-question quiz for a chance to win a gift card
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AD9959
Recommended for New Designs
The AD9959 consists of four direct digital synthesizer (DDS)
cores that provide independent frequency, phase, and amplitude
control on each channel. This...
Datasheet
AD9959 on Analog.com
Hi, I am looking to understand fully the AD9959 evaluation board in order to implement my own driver. I was wondering if it was normal that each channel do not input the same amplitude value and if so why ? I expected to have the same amplitude for each output considering the fact that the output circuitry are the same for each channel (page 25 of the user manual). I am currently restarting to the beginning by reading the full documentations in order to demystify this mystery . And also for each channel we do have 2 types of inputs, the filter and without filter output. I realized that I get nothing with the DAC OUT output without filter because there is no 0 ohms resistor for each DAC output ( resistor 24,23,26 and 28 in the page 25 of the user manual) Is there a reason for that ?
Thank you for your time and wish you the best.
Hi sekou ,
Let me break down your questions to better assist you:
1. I was wondering if it was normal that each channel does not input the same amplitude value and if so, why? Yes, it is normal that each channel has different amplitude values. This is due to applications that requires this.
2. I realized that I get nothing with the DAC OUT output without filter because there is no 0 ohms resistor for each DAC output (resistor 24,23,26 and 28 in the page 25 of the user manual) Is there a reason for that? - This is also normal. It was configured that way so that the board will be customized based on what signal you will be using thus you need modifications when changing from filtered to unfiltered output.
All the best,
Jules
Thank you Jules for the reply. I manage to add the 0 ohms resistors and I now have the desired ouputs.
Thank you Jules for the reply. I manage to add the 0 ohms resistors and I now have the desired ouputs.