I need some Help with choosing ADC

Thread Starter

majd-ghadab

Joined Dec 25, 2012
23
Hello everyone and thank you for this good forum.
I have a question, i would like to sample a signal that has a freqeuncy up to 1 MHz with at least 16 Msps and i mean with this that i don't want ADC Chip to has a clock of of 16 MHz so until i read the data from ADC it will be as a result of this 1 Msps.. so i want to read a real time 16 Msps.
I was searching the internet and i found some Chips but all of them are expensive and the cheapsest solution was one of these LTC2162/LTC2161/LTC2160.. and LTC2160 has a clock of 125MHz and so i think,i will be able to read a real 16 Msps or even 25 Msps but can someone find a cheaper solution .. Thanks
 

nsaspook

Joined Aug 27, 2009
7,591
What type of system (FPGA?) will be reading the data that fast? A LTC2160 has : full rate CMOS, double data rate CMOS, or double data rate LVDS to a 16-bit read port at the selected Msps.
 

Thread Starter

majd-ghadab

Joined Dec 25, 2012
23
What type of system (FPGA?) will be reading the data that fast? A LTC2160 has : full rate CMOS, double data rate CMOS, or double data rate LVDS to a 16-bit read port at the selected Msps.
I will be using 32bit Microcontroller STM32F7.. Thanks for reply
 

nsaspook

Joined Aug 27, 2009
7,591

Thread Starter

majd-ghadab

Joined Dec 25, 2012
23
What port on that chip are you using? With full-buffered FIFO DMA 16-bit reads you might be able to read it at 16MHz with some multiple DMA to memory trickery.
https://www.st.com/content/ccc/resource/technical/document/application_note/7a/88/df/e3/d3/36/40/29/DM00169730.pdf/files/DM00169730.pdf/jcr:content/translations/en.DM00169730.pdf
Hello
Thanks for your reply, i know how to use dma to accelerate the process of reading data.
But my Question if someone can help me to find a Cheaper IC than the that i found.
Thanks in Advance
 
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