AD652SQ Integrated Circuits (ICs)

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AD652SQ is a low-cost, high-performance voltage-to-frequency (V/F) or frequency-to-voltage (F/V) converter from Analog Devices. The device has a maximum frequency of 2 MHz with an output voltage accuracy of 0.1%. The AD652SQ is ideal for applications such as closed-loop feedback of digital frequency synthesisers and digitally-controlled oscillators (DCOs).

Application Fields:

AD652SQ can be used in a wide range of applications such as:

• Data acquisition systems
• Industrial automation and control systems
• Automotive, aviation and military systems
• Remote monitoring and control
• Industrial process monitoring and control
• Motor speed and position control
• Robotic systems and autonomous vehicles.

Working Principle:

The AD652SQ is designed to convert an analog voltage signal into a frequency signal or a frequency signal into an analog voltage signal. The voltage signal is applied to the input and the output is a frequency or voltage, depending on the mode selected. The AD652SQ has two modes of operation: series and parallel. In series mode, the input voltage is applied to the output terminal and the frequency is determined by the input voltage. The parallel mode is similar to the series mode, but the required supply voltage is divided between the two input terminals.

The device has a wide range of adjustment options such as gain, offset, and slew rate. The gain and offset can be adjusted with the external control pins while the slew rate can be adjusted using an internal resistor. The AD652SQ also includes a thermal shutdown circuit and a low voltage lockout circuit to prevent the device from operating under unsuitable conditions.

The device has a built-in reference voltage source that provides a constant voltage output corresponding to the input voltage. This reference voltage is buffered by an internal voltage follower circuit. The reference voltage is also used to generate a variable resistor that is used to control the gain and offset of the device.

The AD652SQ has two outputs: a frequency or voltage output, depending on the mode selected. The frequency output is self-clocking and can be adjusted by varying the reference voltage. The voltage output is provided with a range of 0 to 10V and provides a DC output that is proportional to the input voltage.

The device is designed for use in either constant-voltage or constant-current operation. In constant-voltage operation, the device provides a DC output voltage that is proportional to the input voltage. In constant-current operation, the device provides a current output that is proportional to the input voltage.

In summary, the AD652SQ is a low-cost, high-performance V/F or F/V converter. It has a maximum frequency of 2 MHz and an output voltage accuracy of 0.1%. The AD652SQ is ideal for applications such as closed-loop feedback of digital frequency synthesisers and digitally-controlled oscillators (DCOs).

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