LPC MicrocontrollersのトピックRe: LPC 1768 for high speed adc

LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:41 GMT

Content originally posted in LPCWare by ashish bhave on Thu Oct 23 03:12:34 MST 2014
hello guys,
i am comparatively new to microcontrollers

i wish to convert a signal to digital form, at 6 mhz rate max as well as control the quenching circuit to desaturate the sensor at the same rate max..from which i would be taking the signal.

i would like to dump this data to a sd card,usb ,or to a computer for analysis.

is lpc 1768 the apt microcontroller to handle these simultaneously.

please bear with my questions although they may feel basic. :)

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:42 GMT

Content originally posted in LPCWare by LabRat on Thu Oct 23 03:36:31 MST 2014
Forum search:

http://www.lpcware.com/content/forum/10-bit-adc-possible-lpc1768-i-need-500-ksps

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:42 GMT

Content originally posted in LPCWare by ashish bhave on Thu Oct 23 05:06:39 MST 2014
thank you for such a quick relpy.. :)
i went through the link you posted, and its mentioned as adc conversion frequency is 500ksps with 33mhz adc clock

could i possibly configure a pin as input to my sensor with high/low voltage levels and take the output at a faster frequency as in like an 8051 microcontroller instead of using adc ?

thanks for the link!
i am already loving this forum! :)

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:43 GMT

Content originally posted in LPCWare by LabRat on Thu Oct 23 05:31:07 MST 2014
I'm not sure what you are trying to do...

Of course you can use a faster external ADC converter and connect it to your MCU...

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:43 GMT

Content originally posted in LPCWare by ashish bhave on Thu Oct 23 06:08:59 MST 2014
I am trying to interface a multipixel photon counter (mppc) sensor by hamamatsu tech to this board and get its output digitized on a computer.
while doing it, i have to actively quench the sensor when it saturates.
i found out that one of the mppc ,the max count it generate is at 3 mhz speed.
i am trying to find a suitable microcontroller for this application.

your help is appereciated!
thanks!

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:44 GMT

Content originally posted in LPCWare by ashish bhave on Thu Oct 23 06:09:01 MST 2014
I am trying to interface a multipixel photon counter (mppc) sensor by hamamatsu tech to this board and get its output digitized on a computer.
while doing it, i have to actively quench the sensor when it saturates.
i found out that one of the mppc ,the max count it generate is at 3 mhz speed.
i am trying to find a suitable microcontroller for this application.

your help is appereciated!
thanks!

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:45 GMT

Content originally posted in LPCWare by ashish bhave on Thu Oct 23 06:43:58 MST 2014
do you know of any any adc or an adc on mcu with more than 3 msps speed and quenching capability of the same rate?
what is your take on this?

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:46 GMT

Content originally posted in LPCWare by starblue on Thu Oct 23 08:51:26 MST 2014
Take a look at the LPC4370, it has an 80MS/s ADC. (I don't think there is an NXP Cortex-M with a speed closer to your required 6 MS/s.)

What does "quenching" mean w.r.t. the controller, i.e. what output does it have to do based on what input?

Re: LPC 1768 for high speed adc

lpcware — Wed, 15 Jun 2016 18:01:46 GMT

Content originally posted in LPCWare by LabRat on Thu Oct 23 10:20:05 MST 2014

Quote: ashish bhave
i am trying to find a suitable microcontroller for this application.

Would suggest to use a faster MCU. 100MHz is a little bit slow to work with 3 MHz samples...

A good and cheap entry would be a 204MHz LPC4370 board like:

http://www.embeddedartists.com/products/lpcxpresso/lpclink2.php

Or you use parametric search for M3 / M4 parts:

http://www.nxp.com/products/microcontrollers/cortex_m3/