Measuring LDO Line Regulation for a Novice
Jonathan Harris 10/28/2016 Post a comment
A device going into space must be much more rigorously evaluated than a device going into a commercial product. Hence the need to do a good deal more characterization and ‘proving out’ of the device to make sure that it will endure the harsh environment in space as well as the long lifetimes required.
Virtual Eval Through the Eyes of an ADC, Part 2
Jonathan Harris 7/15/2016 Post a comment
Now that we’ve had a chance to learn a bit about the tool we will take a look at using Virtual Eval to predict the performance of the AD9680-500 which has integrated digital downconverters (DDCs) and will compare simulated data to measured data.
Virtual Eval Through the Eyes of an ADC
Jonathan Harris 6/21/2016 2 comments
As I mentioned in my last blog I would like to take some time in this blog to introduce you to the new online simulator tool offered by Analog Devices called Virtual Eval.
IMS2016: Day 2 Review
Jonathan Harris 5/26/2016 Post a comment
. The day started off just a little slower than yesterday but quickly picked up pace and resulted in another day of steady booth and floor traffic. I had some great questions about the products we are displaying in my demonstration as well as many questions on our other technology on display at the IMS show.
IMS2016: Day 1 Review
Jonathan Harris 5/25/2016 Post a comment
I hope that you had a chance to visit the IMS2016 show during the first day. There was a noticeable increase in floor and booth traffic compared to the show last year. Perhaps you all read my preview blog this week and decided to come and check out our great demonstrations at the Analog Devices booth!
Analog Devices Design Tools: ADIsimRF Part 3
Jonathan Harris 9/24/2015 2 comments
The ADIsimRF tool has many different calculation possibilities which are very nice to have on the hand. These can be useful when either in the lab collecting data or when working on a report in your office. The tool outputs are great to double check experimental results or to set expectations when about to take data.
Analog Devices Design Tools: ADIsimRF Part 1
Jonathan Harris 7/19/2015 14 comments
The topic of this blog came up while at the IMS show and one of my colleagues mentioned that I should discuss the ADIsimRF tool as a part of the series. I thought this was a marvelous idea. I’ll have to precursor this discussion with the fact that I am actually an RF guy from my previous employment at an RF company which was my first position when I graduated from college.
IMS2015 Demo Details
Jonathan Harris 6/3/2015 Post a comment
One of the questions that appeared on one of the IMS blog posts was about the details of the demonstration I had set up at the Analog Devices booth.
IMS2015 – Day 3: The Final and Shortest Day
Jonathan Harris 5/22/2015 Post a comment
The last and final day of the show is usually has the most relaxed atmosphere and this year that proved to be the case once again. It is the shortest day of the show lasting from just 9:00 AM to 3:00 PM.
IMS2015 – Day 2: The Long Day
Jonathan Harris 5/21/2015 2 comments
After having a pretty good first day of the show, I was looking forward to a good second day and it did not disappoint. The second day of the show on Wednesday is the longest day of the show as the exhibit hours go from 9:00 AM until 6:00 PM (day one is 9:00 AM to 5:00 PM and day three is 9:00 AM to 3:00 PM).
IMS2015 – Pre-Show: The Preparation
Jonathan Harris 5/18/2015 Post a comment
It sure doesn’t seem like it has already been a year since IMS2014! Well, technically, it hasn’t been since IMS2014 was in June last year. Once again this year IMS (International Microwave Symposium) is in a state known for its sunshine albeit this time sans the humidity. This year the show visits sunny Phoenix, Arizona.
Interfacing to ADCs: Power Supplies, Part 5
Jonathan Harris 10/31/2014 2 comments
Previously in this blog series we looked at using a DC/DC converter (switching regulator) in combination with an LDO to drive the power supply inputs to an ADC. What we found was that using the DC/DC converter to step down the input voltage for the LDO was a much more efficient way to drive the power supply inputs to an ADC.
Interfacing to ADCs: Power Supplies, Part 3
Jonathan Harris 8/26/2014 16 comments
I thought it would be good to continue looking at the example I gave in my last blog where we looked using fewer LDOs and combining power supply rails on an ADC while maintaining isolation with ferrite beads.
IMS2014 – The Preparation
Jonathan Harris 6/23/2014 5 comments
Once again I thought I'd do a series of blogs on my experiences as an applications engineer for a major semiconductor company, Analog Devices, at International Microwave Symposium (IMS).
ADC Power Supplies: Inputs
Jonathan Harris 6/2/2014 4 comments
We’ll start by taking a look at the power supply inputs of the ADC, what we typically use to supply power to the ADC, and some of the tradeoffs of the different methods.
ADC Noise: How the Clock Input Can Help
Jonathan Harris 1/24/2014 4 comments
One of the most critical areas on an ADC that can affect performance is clock noise. Good layout and routing techniques coupled with an optional filter can do wonders in improving key specs.
How Do You Analyze ADC Noise? Part 2
Jonathan Harris 12/27/2013 5 comments
This time, let's look at the noise that can enter the ADC through its signal and common mode inputs. Then we'll go through a noise calculation to see how it's done.