Comparative analysis of Epson SG-8200CJ programmable crystal oscillator and other common crystal oscillators

Nov 14,2024
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frequency characteristic

Epson SG-8200CJ: With a frequency range of 1.2MHz to 170MHz, it can meet various special frequency requirements through programmable functions and provide accurate clock signals for different electronic devices. The frequency tolerance is ± 15 × 10 ⁻⁶ within the temperature range of -40 ° C to+105 ° C; Within a wider temperature range of -40 ° C to+125 ° C, the frequency tolerance can be controlled within ± 25 × 10 ⁻⁶ or ± 50 × 10 ⁻⁶

Ordinary quartz crystal oscillator: The frequency is relatively fixed and can only provide specific standard frequency values, such as common 12MHz, 24MHz, 32.768kHz, etc., which cannot meet special frequency requirements. Although its frequency is stable, its temperature characteristics are relatively poor. In environments with large temperature changes, its frequency stability is not as good as that of programmable crystal oscillators

Temperature compensated crystal oscillator (TCXO): Its frequency stability is better than that of ordinary quartz crystal oscillators. By using a temperature compensation circuit to reduce the influence of ambient temperature on the oscillation frequency, it can maintain a stable oscillation frequency within a certain temperature range. However, its frequency range is usually relatively narrow, and the programmability of some temperature compensated crystal oscillators is not as good as SG-8200CJ

OCXO (Constant Temperature Crystal Oscillator): It has extremely high frequency stability and accuracy, and contains a constant temperature bath inside, which allows the crystal to work at a constant temperature without being affected by external temperature. However, it is expensive, bulky, and high in power consumption. It is generally suitable for special occasions that require extremely high accuracy, such as satellite communication, navigation systems, etc. SG-8200CJ has better cost-effectiveness and miniaturization advantages while maintaining a certain level of accuracy。

Jitter performance

Epson SG-8200CJ: The typical phase jitter value is as low as 1.1ps (at a frequency of 125MHz and an offset frequency of 12kHz to 20MHz), which can effectively reduce signal interference and measurement errors caused by clock instability, providing a stable and reliable clock reference for electronic devices that require extremely high clock accuracy

Ordinary quartz crystal oscillator: The jitter performance is relatively poor, and its short-term frequency stability is greatly affected by noise. In the time domain, the corresponding parameter jitter is relatively large. In some high-speed communication or high-precision measurement equipment with strict jitter requirements, it may not meet the performance requirements

Temperature compensated crystal oscillator and constant temperature crystal oscillator: Although they have certain advantages in frequency stability, their jitter performance is generally not as good as SG-8200CJ. In some application scenarios that require both frequency stability and low jitter, SG-8200CJ has more advantages.

temperature characteristic

Epson SG-8200CJ: With temperature compensation function, it has high frequency stability across the entire temperature range, and can support temperatures up to+125 ° C. It is widely used in industrial control, automotive electronics, and other fields that require high temperature adaptability

Ordinary quartz crystal oscillator: Ordinary quartz crystal oscillator is greatly affected by temperature, and its frequency will shift significantly with temperature changes. In high or low temperature environments, it may cause equipment performance degradation or even malfunction

Temperature compensated crystal oscillator: The temperature compensation circuit has to some extent solved the problem of temperature affecting frequency, but the temperature compensation range and accuracy of different models of temperature compensated crystal oscillators vary. Overall, the frequency stability over a wide temperature range is not as good as SG-8200CJ

Constant temperature crystal oscillator: Although it performs well in temperature stability, its constant temperature bath structure results in a large volume, high power consumption, and high cost. In some applications that do not require extremely strict temperature stability and are sensitive to cost and volume, SG-8200CJ is more competitive

Packaging and Size

Epson SG-8200CJ: With a package size of 2.0 × 1.6mm and a compact size, it helps save circuit board space and meets the design requirements of modern electronic devices for miniaturization and lightweight

Ordinary quartz crystal oscillator: Traditional packaged quartz crystal oscillators such as HC-49S/U/M have large dimensions and high mechanical strength, but are not suitable for high-density circuit designs that require strict space requirements

Surface mount crystal oscillator: The size of the surface mount crystal oscillator generally ranges from 1612 to 7050mm. SG-8200CJ is a smaller product in the surface mount crystal oscillator category and is more suitable for miniaturization and high integration electronic devices, such as mobile devices, wearable devices, etc。

Programmability

Epson SG-8200CJ: It has strong programmability and can edit the output frequency according to specific customer needs. It also has output enable and standby functions, allowing users to flexibly control the working state of the crystal oscillator, greatly improving the flexibility and efficiency of the design. It is especially suitable for application scenarios that require high frequency flexibility, quick customization, and delivery

Ordinary crystal oscillator: does not have programmable function and cannot flexibly adjust frequency according to specific application requirements. In some special communication equipment development or projects with specific frequency requirements, the use of ordinary crystal oscillator may be limited

Partial temperature compensated crystal oscillator and constant temperature crystal oscillator: Some temperature compensated crystal oscillators and constant temperature crystal oscillators may also have some programmability, but their programming flexibility and frequency range are usually not as good as SG-8200CJ.

Delivery cycle

Epson SG-8200CJ: Using PLL technology, it achieves fast turnaround time and can meet customers' delivery needs for samples and bulk products in a short period of time. Generally, it can be delivered within 1-3 working days, which helps accelerate product development and market cycle

Ordinary crystal oscillator: If it is a standard frequency ordinary crystal oscillator, there is usually a large amount of spot supply in the market, and the delivery cycle is relatively short; But for some ordinary crystal oscillators with special frequencies or customized requirements, the production cycle may be longer, and the delivery time may take several weeks or even months。