Application of Epson MC-30A Crystal Oscillator in Automotive Instrumentation System

    In the design of automotive instrument systems, the most important factors are the power consumption and stability of the entire system. At the same time, the volume parameters of the instrument printed circuit board should also be considered. The area parameter of the printed circuit board for general instruments is about 30x13mm, and the space around the main controller is very small. In addition to the power supply equipment, in order to meet the design requirements, small size crystals with high reliability are selected from the details. In terms of reliability, Epson crystal oscillator manufacturer has launched MC-30A car standard crystal oscillator Q14MC30A2xxx00, which can provide stable output frequencies of 32.768kHz and other 20kHz-120kHz. When the frequency is 32.768kHz, the frequency tolerance is+20 * 10-6,+50 * 10-6. At other frequencies, the frequency tolerance is+20 * 10-6. When working, the frequency tolerance is 50 10-6100 10-6. The frequency temperature coefficient is only -0.04x10-6/2, and the output frequency is less affected by temperature. The crystal aging rate is only+3x10-6/year. Long service life, meeting the requirements of stable application of automotive instruments.

    The maximum excitation power of the MC-30A car standard crystal oscillator Q14MC30A2xxx00 is 1MW, and the operating temperature is -40-85C, which can meet the application requirements of low-power instrument microcontrollers. In the miniaturization design, the size parameters of MC-30A are 8.0 * 3.8 * 2.54mm, and surface mount packaging is used. In the application of MC-30A, the crystal oscillator needs to be equipped with a filtering capacitor. The standard value of load capacitance for MC-30A is 12.5pf. Meanwhile, the maximum series resistance of MC-30A is 50K, which is a relatively small value and can meet the requirements for starting vibration. Simultaneously meet the AEC-Q200 passive component quality standard certification and fulfill all requirements of automotive instrument systems.

    The MC-30A automotive grade crystal oscillator Q14MC30A2xxx00 launched by Epson has a load capacitance as low as 6pF, which helps to avoid microcontroller misoperation. It is packaged in SMD, with a 25 hour excitation power of 0.1W, standard frequency tolerance of (+20 * 10-6,+50 * 10-6,+100 * 10-6), frequency range of 32.768kHz (20kHz~120kHz), working temperature range of -40+85, and strong environmental adaptability. It is an ideal choice for automotive applications. In addition, the excitation power of the system is 1.0W (maximum), which can reduce the power consumption of the system. The ultra small package (8.0 mm * 3.8 mm * 2.54 mm) can save system space.