In the data sheet the AD654 states that it can be used for F/V conversion but I did not see this configuration in the data sheet or find it obvious, how would I connect the AD654 for this application?
We have an application note which discuss how do you make a frequency-to-voltage converter using the VFC as its oscillator. Please see attached file (Page 2). The example here uses the AD654. Hope this helps. http://www.analog.com/media/en/technical-documentation/application-notes/84860375AN361.pdf