Arrow goes inside the lab with the LTC2380-24 from Analog Devices' Power by Linear.
Welcome to inside the lab with Arrow Electronics. The web series dedicated the latest in technology and electronics. Today, we’ll show you Analog Devices' Power by Linear's 24 SAR LTC2380-24. It consumes a low 28mW of power operating at two mega samples per second, has an integrated digital filter that promises 145dB of dynamic range at 30.5sps. It has no missing codes a full sampling rate, operates with no latency, and offers low distortions, making it ideal for applications such as seismology, energy exploration, and medical imaging. We’ll walk you through our demo set up and highlight some of the things we did to maximize the performance using demo kits from Analog Decives' Power by Linear.
The LCT2380-24 is such a high quality ADC that you need a high quality source to its capabilities. We’re using the DC1858 to produce two kilohertz sound wave. This provides a clean signal so we can get what we want. The source goes to a fully differentiated ampliphier that splits it and provides a common mode voltage that goes in and acts as the wrap over two. This is how we get a clean, easy to see source. We then have to worry; about the sample clock for the ADC itself. We have a demo board for LTC’s dc1216 a low cost low notice 100 MHz clock. This clock drives the ADC. It’s a sampling clock so it knows how frequently to sample. On the DC 2289A you get an optional first order low pass filter. This also includes a 100 MHz rail to rail input to output that acts as an input buffer to the ADC. All of this is set up for the AC sampling. It’s also easy to switch over to DC sampling; we’ll do that in a minute. It’s just a quick jumper change and you’re good to go.
We’re going to discuss the output information that I’m getting from PScope. (DEMO) It’s quite impressive. It has all the parameters, all the harmonics. You can change the size of the bins and mega samples per second and how you’re going to window it. It’s a great tool to show the ADC works and all the benefits you can get from the ADC.
Now we have the DC measurements set up. We have 10 volts coming into the board, created by our friend Bong at Arrow. It actually splits it from 10volts down to 2.5 volts. It cleans as much noise out as possible. It then goes to our LTC2380 that is set up for DC measurement, then goes to the communication board, which is the DC590B. As we look here at the laptop we can see that the DC noise is about 75MHz, which is very low. It shows how quite this ADC can get. We can also use the Linduino.
The LTC2380-24 comes in a 16 lead msoft or a 4mm DFM package and is drop in pin compatible with the family of 16, 18, and 20 bit SAR ADC’s. Allowing designs using these ADC’s to upgrade easily.
All the evaluation boards are available at Analog Devices' Power by Linear. You can learn more at Arrow.com