Voltage frequency converter circuit composed of AD654

Published:2011/4/20 1:36:00 Author:Ecco | Keyword: Voltage frequency, converter | From:SeekIC

The circuit shown in the figure is low-cost voltage frequency converter (VFC) with AD654. Connecting to necessary components Rl and Cl according to figure will make a VFC application circuit. Supply voltage can still guarantee performance to l6.5V when it is as low as 4.5V. The maximum power consumption is 3mA (no load). The highest frequency is 520kHz. The input voltage range is limited to 0 ~ 4V. The input span Vi is decided by resistor Rl, that is Vi / Rl = lmA. For example, Vi = 0 ~ 1V, Rl = lkΩ, Vi = 0 ~ 5V, Rl = 5kΩ. Output frequency range is corresponding to the Cl, Fomax = l/l0Cl, the unit of C1 is μF. For example, Cl = 0.1μF, the output frequency is 0 ~ lkHz; Cl = 0.001> F, the output frequency range is 0 ~ l00kHz.



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