AD654JR Integrated Circuits (ICs)

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AD654JR application field and working principle

The AD654JR is a versatile voltage-to-frequency (V/F) and frequency-to-voltage (F/V) converter IC manufactured by Analog Devices. With a wide operating voltage of 2.7V to 18V, the AD654JR is suitable for a variety of both commercial and industrial applications, such as frequency measurement and conversion for automotive, industrial automation and control, and powering monitoring systems.

The chip features an onboard reference, temperature-compensated timing capacitors and hysteresis frequency modulation. The AD654JR has an onboard temperature-compensated reference, which provides excellent linearity and superior stability. The hysteresis frequency modulation allows the AD654JR to maintain stable frequency output in wide temperature range, even without additional external components. Additionally, the chip also features high accuracy, fast settling time and low power consumption.

When used in V/F mode, the chip can be programmed to output a linear voltage-to-frequency (V/F) slope with an offset voltage and gain. The AD654JR uses a resistor and capacitor network to control the frequency of the output. The frequency of the output can be programmed by the external resistor and capacitor setting. Additionally, the hysteresis frequency modulation helps maintain the accuracy of the frequency output and prevent the frequency from changing over temperature or supply voltage variations. The AD654JR also provides a soft start feature, which ensures a smooth transition from the initial OFF state to the programmed frequency output.

When used in F/V mode, the chip can be programmed to output a linear frequency-to-voltage (F/V) slope with an offset frequency and gain. The AD654JR uses a resistor and capacitor network to control the voltage of the output. The voltage of the output can be programmed by the external resistor and capacitor setting. Additionally, the hysteresis frequency modulation helps maintain the accuracy of the voltage output and prevent the voltage from changing over temperature or supply voltage variations. The chip also provides an optional current source to further reduce circuit complexity, eliminate the need for separate external current sources and minimize errors due to supply changes.

In summary, the AD654JR V/F and F/V converter IC from Analog Devices offers a wide voltage operating range of 2.7V to 18V, onboard temperature-compensated reference, hysteresis frequency modulation, high accuracy, fast settling time and low power consumption for a variety of commercial and industrial applications. These features give designers the flexibility to create frequency or voltage measurements accurately, quickly and easily in various applications.

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