[原创]Maxim MAX31328±3.5ppm I2C实时时钟(RTC)解决方案

Maxim公司的MAX31328是低成本极为精确(±3.5ppm)的I2C实时时钟(RTC),并集成了温度补偿晶体振荡器(TCXO)和晶体.器件采用电池输入,在设备主电源断电后能保持高精度计时.RTC维持秒,分,时,日,月和年的信息.当月小于31天时,月终的日期能自动进行到底调整,包括闰年的修正.时钟工作在24小时或带有AM/PM指示的12小时格式.提供可编程的日闹钟和可编方波输出.地址和数据通过I2C双向总线串行进行传输.精密的温度补偿的电压基准和比较器电路监视VCC状态,检测电源的失效时并能自动切换到备份电源,如果有必要.工作温度-40C 到 +85C,工作电压2.3V到5.5V,计时电池的电流为660 nA,2C接口工作频率400kHz.主要用在服务器,电表,GPS和远程信息处理.本文介绍了MAX31328主要优势和特性,简化框图,典型应用电路图以及评估板MAX31328 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX31328 is a low-cost, extremely accurate, I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device and eliminates the external crystal requirement in the system. The MAX31328 is available in a 10-pin LGA package.

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