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Hi support team all.
We have received a question from our customer as below.
Question 1: When used with Voltage-to-Frequency,
Is it possible to control the frequency in 0.001V steps in the input voltage range of Vin from 0 to 10V?
Example: Vin:5.001, 5.002V...→50.01kHz, 50.02kHz
Question 2: If Vin cannot be controlled in 0.001V steps, please tell us the resolution at which Fout can be controlled relative to Vin.
<Circuit concept>
R1: 40kΩ, C1: 330pF, C2: 1000pF
⇒Vin:5V=50kHz, 10V=100kHz
I would like to control the frequency in 0.001V steps using the above concept.
Best regards,
Higa
Hi Higa-san,
Is it possible to control the frequency in 0.001V steps in the input voltage range of Vin from 0 to 10V?
I am a bit skeptical that VFC32 is able to have 1mV incremental resolution to do the V-to-F conversion over temperature. ...
Question 2: If Vin cannot be controlled in 0.001V steps, please tell us the resolution at which Fout can be controlled relative to Vin.
There is nominal 1mV and up to 4mV offset voltage at the Vin, which it has to be null out.
The circuit needs to have ultra low leakage capacitor for integration and RC time constant. If it is operating at a constant temperature, you may be able to fine tune the V-to-F converter.
In addition, the dual power supply rails have to be low noise and stable type, otherwise, it will be challenge to achieve what you after.
Please let me know if you have other questions,
Best,
Raymond
