Author Topic: THS1030 ADC worth trying?  (Read 2091 times)

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Offline StonentTopic starter

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THS1030 ADC worth trying?
« on: October 19, 2013, 09:56:07 am »
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_288681_-1
http://www.ti.com/lit/ds/slas243e/slas243e.pdf

Jameco has these TI THS1030 10bit 30Msamples/sec ADCs on clearance for $2.25 each. I'm intrigued by them but wonder if trying to implement one is doable at the hobby level.

So in theory this thing could be dumping data at me 30 million times a second. What would you need in order to capture data like that?

I see that it has 10 output pins so I gather that a sample will be a 10 bit binary number represented by those pins at a state of highs and lows.

If it's as simple as connecting those 10 pins to 10 GPIO pins on another device that can react at the speed you feed data to it, I might consider it but if it's one of those, "yeah the ADC is $3 but you need another $50 worth of components before you can connect to it" things I'll just not bother.
(Other device meaning, a microcontroller, Raspberry Pi, Beaglebone, parallel to serial shift register etc)



« Last Edit: October 19, 2013, 09:58:30 am by Stonent »
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Offline amyk

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Re: THS1030 ADC worth trying?
« Reply #1 on: October 19, 2013, 10:37:11 am »
What do you want to make with it?
 

Offline Rerouter

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Re: THS1030 ADC worth trying?
« Reply #2 on: October 19, 2013, 10:55:26 am »
it is made to be read in parallel to utilize the full update rate, you would need your shift register running at 300Mhz to run that into a serial interface and that starts edging into RF black magic territory,

as far as how the chip goes, the offset and gain specs are horribly, 3.5% of full scale range gain error means your 3V just became 2.9 - 3.1V for a 3V supply,
 

Online Marco

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Re: THS1030 ADC worth trying?
« Reply #3 on: October 19, 2013, 02:03:03 pm »
As long as the offset and gain errors are stable you can calibrate them out.

Generally people use FPGAs to interface with fast ADCs, to have any success with microcontrollers or processors at these speeds they would have to support triggered DMA for the GPIO ports ... no idea which boards can do that.
 


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