Re: how to find the best ADC step size?

From: Tim Wescott (tim_at_wescottnospamdesign.com)
Date: 12/22/04 

Date: Wed, 22 Dec 2004 12:03:53 -0800

Scott Seidman wrote:
>>
>
> Learn something new every day! My impression, though, is that the ADC is
> high-bit linear, and then it's companded to a lower bit count. Is this
> how it's done, or do the ADC spirits do the whole thing in one step?
>
> Scott
It could be done either way. In the old days it was probably done with
256 comparators and a long string of resistors -- today it's probably
done with a 12-bit ADC and a look-up table. 

-- 
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Relevant Pages

  • Re: Help interfacing Current Transformers to ADC
    ... with an analog multiplexer going into one ADC? ... Wescott Design Services ...
    (sci.electronics.design)
  • Re: Help to choose the right ADC
    ... I'm oriented on sigma-delta adc, but i haven't found adc with this ... If you've got the computing power, why not use a SAR, oversample, filter and decimate? ... Wescott Design Services ... "Applied Control Theory for Embedded Systems" gives you just what it says. ...
    (sci.electronics.design)
  • Re: Is there still something like the old 2105?
    ... I have some experience with 24xx series ADC, and I must say that it ... The '2401 is like the '2812 in that it's really designed for advanced motor control -- that's why the data sheet says "Several advanced peripherals, optimized for digital motor and motion control applications, have been integrated to provide a true single-chip DSP ... Wescott Design Services ...
    (comp.dsp)
  • Re: Buffer-OP on the input of the ADC
    ... > recomended to use an op-amplifier on the inputs of each channel (I use the ... > ADC as single ended), to work as a buffer or drive amplifier. ... > recomend a specific op for the purpose?? ... Wescott Design Services ...
    (comp.arch.embedded)
  • Re: Ming RX Rx module: output all over without signal, Is this normal ?
    ... if you have an ADC on your PIC ... >>Tim Wescott ... >>Wescott Design Services ... I've designed receivers, but I've never used a module. ...
    (sci.electronics.design)
Quantcast