BQ4802LYDWR

The BQ4802LYDWR is a 32 kHz watch crystal oscillator. It features improved frequency stability over temperature with better phase noise performance and can operate over a wider temperature range. The BQ4802LYDWR is ideal for applications requiring extreme stability and accuracy.

Applications for the BQ4802LYDWR range from communication systems, to embedded microelectronic systems, and to general purpose oscillators. It is widely used in clock and timing functions such as real-time clocks, clock synthesizers, and self-adjusting timing systems.

Real-time Clocks

Real-time clocks are used in applications that require accurate timing both during normal operating conditions, and when the system experiences power failures. The BQ4802LYDWR is used in real-time clocks because it has superior frequency stability, low phase noise, and a wide operating temperature range. The BQ4802LYDWR is typically used in combination with a quartz crystal oscillator, or with a digital counter device to generate the clock output.

The BQ4802LYDWR operates in a low-power standby mode, which allows the device to maintain accurate timing even when the system is not operating. During normal operation, the oscillator is placed in an active state, and an output signal is generated. The output signal is then used to provide accurate timing information for the system.

Working Principle

The core of the BQ4802LYDWR is a quartz crystal oscillator, which is a device that uses piezoelectricity to generate a fixed-frequency oscillation. The quartz crystal oscillator consists of a quartz crystal resonator surrounded by two metal electrodes. When an alternating voltage is applied to the electrodes, the quartz crystal vibrates at a fixed frequency and will generate a corresponding AC output signal.

The BQ4802LYDWR also includes an amplifier circuit to amplify the output signal of the quartz crystal resonator. This amplifier circuit is designed to provide a constant and stable output signal over a wide temperature range, which allows the BQ4802LYDWR to remain accurate over a variety of operating conditions.

Once the output signal is generated, it is then used to provide accurate timing information for the system. The BQ4802LYDWR is typically used in applications that require accurate timing over extended periods of time, such as real-time clocks and clock synthesizers.

Overall, the BQ4802LYDWR is a reliable and accurate device that is ideal for use in clock and timing applications. It offers superior frequency stability, low phase noise, and a wide operating temperature range, making it an excellent choice for applications requiring precision timing. It is commonly used for real-time clocks, clock synthesizers, and self-adjusting timing systems.