Epson automotive crystal oscillator, selection and application of automotive grade crystal oscillator specifications

    With the continuous development of technology, the degree of automotive electronicization is increasing, and various electronic control systems are widely used in automobiles. Crystal oscillator, as an important component in automotive electronic control systems, plays a crucial role in the performance and safety of automobiles.When it comes to automotive grade crystal oscillators, many people may be unfamiliar with them. Generally, automotive grade crystal oscillators can also be called automotive grade crystal oscillators, automotive crystal oscillators, car mounted crystal oscillators, etc. It refers to a commonly used term for frequency components such as crystal oscillators, crystal resonators, sensors, gyroscopes, etc. that comply with AEC-Q200 technical standards and are used in applications such as car navigation devices, safety equipment, ADAS (Autonomous Driving Assistance Systems) in automobiles or onboard devices. Epson has launched numerous frequency components for automotive applications that require special environments, covering Epson crystal oscillators, crystals, clock modules, gyroscopes, and other products. Below are several Epson automotive grade crystal oscillator selections and applications for your reference:

Introduce the automotive crystal oscillators used in the design of car surround view systems: SG2016CAA, SG2520CAA

A large number of advanced technologies have been applied to automotive ADAS systems, and surround view systems (AVM) have been configured in some cars. Drivers can visually observe the surrounding information of the car during the driving process through the surround view system, reducing the probability of accidents. Traditional automotive grade crystal oscillators have insufficient frequency stability and are prone to oscillation phenomena; The aging frequency of crystal oscillators is high, making them difficult to apply to highly integrated products such as surround view systems. SG2016CAA and SG2520CAA automotive grade crystal oscillators are mainly used to connect to image processing MCUs and provide accurate clock output signals. The frequency stability of the three crystal oscillators (-40-125 ℃) is ± 100 × 10-6 (Z), which is better than that of general crystal oscillators and can solve the oscillation problem caused by low frequency stability of crystal oscillators. The two car crystal oscillators have standby function, with power consumption of 1.6mA, 2.4mA, and 3mA respectively under no-load conditions (-40-85 ℃), which can meet the requirements of low-power applications. The aging rate of crystal frequency is only ± 3x10-6/year, which has a long service life and can solve the pain point of high aging frequency in traditional crystal oscillators. In terms of miniaturization design, the size parameters of both automotive grade crystal oscillators are 2.5 × 2.0 × 0.8mm, which can meet the requirements of miniaturization applications.

Application of automotive grade crystal oscillator RA8900CE in automotive instrument system:

The Epson automotive grade crystal oscillator RA8900CE is equipped with a 32.768KHZ quartz crystal oscillator and uses DTCXO for temperature compensation, adjusting the initial accuracy to a 13 second error per month. This real-time clock does not require an external crystal oscillator, enhancing the reliability of in car products. In the automotive BMS system, the high-precision and low-power RA8900CE can help the system achieve functions such as power detection, power management and alarm, and communication with the charging module.

Let me introduce the application of automotive grade crystal oscillator FA-238A in car navigation systems

Most MCUs in car navigation systems use external crystal oscillators. In the circuit design of car navigation systems, PCBs are generally small in size and require long, efficient, and stable operation. Therefore, it is important to use a highly stable and compact car grade crystal oscillator. In the application of FA-238A, after connecting the microcontroller, it provides high-precision high-frequency clock reference for the microcontroller, and the MCU can be externally connected to LCD display, memory, wireless module, etc. to complete the communication, indication and other functions of the instrument. The crystal oscillator needs to be equipped with a load capacitor, and the FA-238A can be configured with a load capacitor of 7pF - ∞. At the same time, the FA-238A meets the AEC-Q200 passive component automotive quality standard certification, meeting all the usage requirements of automotive navigation systems.