[sdiy] (Low) frequency to voltage conversion

J. Verhoeven jarno.verhoeven at ziggo.nl
Wed Mar 26 20:44:01 CET 2014


Sending this to the list as well, sigh :-)
In the meantime, I have found the pictures I made of my RS-30, and it is LM2917N-8. Let me know off-list if you are interested to receive the pictures, could give some hints considering use of the IC in a S-DIY context.

Best regards,

Jarno.


-------- Original Message --------
From: "J. Verhoeven" <jarno.verhoeven at ziggo.nl>
Date: Mar 26, 2014 8:38:41 PM
Subject: Re: [sdiy] (Low) frequency to voltage conversion
To: Justin Owen <juzowen at gmail.com>

Well the Analogue Systems RS-30 uses a LM IC to do Frequency to Voltage conversion, can't recall the exact type though. I have been looking at some of the Burr Brown IC's some of them seem have pretty good (relevant) specs.
Since that time though, I have acquired a midi pickup on my bass, so the need evaporated :-)

Best regards,

Jarno.


On 03/26/14, Justin Owen <juzowen at gmail.com> wrote:
> Has anyone got any experience with using off the shelf F/V chips like LM2907/LM2917/AD650/ADVFC32 with frequencies between approx. 1Hz and 0.001Hz?
> 
> A quick review of a few data sheets today seems to show that they focus on the upper range of capability rather than the lower range. The AD650 mentions it's linearity at 10KHz.
> 
> I'm looking at options other then a uM or from scratch 'Tacho' circuits for F/V conversion in the sub 1Hz range.
> 
> P.S. I'm currently only after measuring 50/50 square waves...
> 
> Thanks,
> 
> - J
> 
> 
> 
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