AX7DAF1-662.0000C

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Oscillators

An oscillator, by definition, is a device or circuit which generates a periodic waveform, typically a sine wave, without an input signal. This device is commonly found in digital systems as it produces synchronized clocking signals which allow for precise timing of data transmission and proper storage of data in RAM or other memory locations.

AX7DAF1-662.0000C is a specific type of oscillator with an extremely stable output, with typically 0.1 ppm (parts per million) variation over a wide temperature range. It has an integrated temperature sensor and can be trimmed for frequency accuracy.

This oscillator can be used where high precision is required, for applications such as communications, instrumentation, radar and other radio applications. It is especially useful for replacing XO (crystal oscillator) solutions due to its small size. The AX7DAF1-662.0000C is packaged in a 6.2 x 7mm ultra-small form factor.

The AX7DAF1-662.0000C uses a voltage-controlled oscillator (VCO) with a fundamental-mode crystal. This type of oscillator is inherently more precise than XO solutions and is usually tuned to a fixed, low voltage such that the frequency is independent of temperature changes. The oscillator consists of an amplifier, often made with a high speed current feedback operational amplifier, an impedance resistor, a crystal resonator and external circuit components to control the frequency and set the amplifier gain. The amplifier is compensated by adding an external capacitor and feedback is maintained by an additional capacitor.

The voltage-controlled oscillator with a fundamental-mode crystal is more accurately known as a Voltage Controlled Crystal Oscillator (VCXO). The main advantage of this type of oscillator is its much lower phase noise to frequency ratio as well as its high level of frequency accuracy and stability. When the amplifier is tuned to its optimal voltage level, this type of oscillator is significantly more precise than other types of oscillators.

For higher frequency applications, the AX7DAF1-662.0000C can be designed with various temperature compensation functions. It is also possible to adjust the frequency of operation as well as the modulation bandwidth. This makes it ideal for applications requiring high precision timing.

In summary, the AX7DAF1-662.0000C oscillator is an exceptionally precise and low-cost voltage-controlled oscillator. Its small size, extreme frequency accuracy and stability, as well as its temperature compensation capabilities make it suitable for a wide variety of applications including communications, instrumentation, radar and other radio applications.

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