M685-02-AB-ADT

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Pin Configurable/Selectable Oscillators form a group of oscillators that can be configured through an external resistive network or a set of digital control pins and configured for specific frequency, power and other operation parameters. The M685-02-AB-ADT is an example of this type of oscillator and caters for an extensive variety of applications across different industries. This article provides a brief overview of the application field and working principle of the M685-02-AB-ADT oscillator.

Application Field

The M685-02-AB-ADT is a 5V low current, low jitter and low phase noise oscillator. It supports a wide range of frequency selection between 1.5MHz and 500 MHz and power levels up to 10dBm. The M685 also offers several different stability levels to suit most customer needs. This allows it to be used in a range of applications, including:

• Broadcast Radio
• Wireless Communications
• Medical Devices
• Military Application

Working Principle

The M685-02-AB-ADT is a pin configurable/selectable oscillator that uses a resistor network to set the output frequency. The external resistive network is connected between the oscillator’s input pins, labelled XTL and VCC. When the two pins are connected, a voltage-controlled crystal oscillator (VCXO) begins to oscillate at the frequency set by the external resistive network. The frequency of the oscillator can be changed by adjusting the resistor values in the external network. The M685 also offers an optional digital control pin, which can be set as a frequency select pin or as a control pin that can adjust the oscillator\'s frequency in software.

The M685 is a low-power, low-jitter, low-phase noise oscillator. It has a power-saving standby mode that reduces the power consumption of the oscillator to just 1.5mA. The low power consumption allows the M685 to meet the requirements of a wide range of applications, including portable and battery-operated products, which require low power. The oscillator is also optimized for minimal jitter, which is important for high-performance digital systems, and low phase noise, which is essential for radio systems.

The M685 supports several different stability levels, from standard (±25ppm) to extreme stability with a maximum of ±3ppm. The oscillator can also be programmed to shift its frequency over temperature (FOT) from 0% to 70%, depending on the specific application needs. This allows the oscillator to meet the most demanding frequency control requirements.

The M685 is an ideal solution for a wide variety of applications requiring precise frequency control over wide range of frequencies and temperatures. It offers excellent performance as well as a low power consumption and a selection of low jitter and low phase noise levels.

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