Voltage-frequency conversion circuit

AD654 is a low-cost voltage-to-frequency converter. It can work on either +5~+36V single power supply or
±5-±18V dual power supply. The maximum input voltage is 36V, the maximum operating frequency is 500kHz, static The current
is 2. OmA, typical temperature coefficient is ±50×10 -6lcc, typical drift is 4vV/C. Voltage-frequency conversion circuit
Figure 10-40 shows the basic voltage- frequency conversion circuit.
    The voltage is input from pin ④, amplified and sent to the voltage controlled
oscillator to change the frequency of the voltage controlled oscillator.
The signal is output from pin ① after passing through the drive circuit (it is an
open collector output and needs to be connected to a pull-up resistor).
The output frequency four of the circuit is determined by the input voltage vl^, and external
R and C
    fuu-r=yIN／(10RC)