The “Time Manager” of Smart Energy Meters
With the popularization of household energy storage systems and the digital upgrade of energy, single-phase energy meters serve as the“core perception layer” for household electricity data collection, requiring high-precision measurement, time-of-use pricing settlement, fault event location, remote meter reading, and other functions. This relies on a precise clock chip—it must operate stably for a long time in complex power grid environments, meet millisecond-level timestamp recording, and have low power consumption for over10 years, with strict requirements for full temperature range (-40℃~105℃) error compensation.
Domestic RTC Chip SD8825: Breaking Performance Barriers
As a domestic clock chip with full temperature compensation algorithms,SD8825 redefines the real-time clock standard with three major features: “high reliability, no calibration, ultra-low power consumption”:
SD8825 Pin Diagram
1. Fully Automatic Temperature Compensation
Built-in crystal oscillator+high-precision compensation algorithm,-40℃~+85℃ error <±5ppm (annual error only2.6 minutes), high-temperature performance far exceeds traditional external crystal oscillator solutions.
2. Hardware-Level Simplified Design
No external crystal oscillator/capacitor required,14 pin SOP package compatible with mainstream RTC chips (such as SD3025T, 8025T).
3. Millisecond-Level Time Management
1/1024 second register supports 1ms timestamp recording, combined with minute/second interrupt wake-up mechanism, meeting the event sequence recording requirements of energy meters.
4. Extreme Low Power Consumption
0.6μA static current (3V power supply), timing voltage 1.5V~5.5V.
5. Multi-Dimensional Security Assurance
Communication XOR check+ read-write protection mechanism, dual protection against data tampering risks;
Built-in unique ID code (8 bytes), effectively preventing device forgery costs.
Single-Phase Energy Meter Principle Block Diagram
Advantages of SD8825 in Single-Phase Energy Meter Applications
SD8825’s innovative design directly addresses industry pain points, aiding in the development of high-efficiency, high-reliability energy meter solutions:
Core Scene Advantages
1. Simplified System Design
Eliminates the crystal oscillator matching debugging phase, shortening the development cycle by 60%; supports IIC bus communication.
2. Ensures Time-of-Use Billing Accuracy
Built-in leap year automatic correction algorithm, supporting millisecond-level switching for peak and valley pricing strategies.
Conclusion
Currently, the SD8825 chip has passed the testing and certification of the State Grid Metering Center. SD8825 provides a “chip-level time reference solution” for household single-phase energy meters through its built-in full temperature compensated clock source+ multifunctional hardware design, significantly reducing the risk of billing disputes caused by clock errors.
Act now to empower the upgrade of single-phase energy meter devices!
📲 For more details Contact: Please contact the company’s sales representatives and agents📩 Sample Request: [email protected]🌐 Direct to Official Website: www.whwave.com.cnAbout Xingweifan Electronics
Xingweifan Electronics was established in 2000, headquartered in Bantian, Shenzhen. The company has a chip design center, reliability laboratory, and module production base, recognized as a national high-tech enterprise and a specialized and innovative small and medium-sized enterprise in Shenzhen.
The company has always focused on the research and production of clock chips and modules, adhering to technological innovation and independent research and development. In the field of RTC, the company has over twenty years of technical accumulation, with cumulative shipments of chips and modules reaching hundreds of millions.
Xingweifan RTCs are widely used, with over 3,000 customers, covering automotive electronics such as BMS, TBOX, EDR; smart transportation like high-speed rail, subways, ETC; security systems like monitoring, access control, attendance; water, electricity, and gas meters; computer systems including government computers, servers, industrial gateways; and home appliances such as blenders, central air conditioning, water heaters, etc. The stability and reliability of Xingweifan RTC products have been recognized by numerous brand customers.
In the future, Xingweifan Electronics will take “providing more accurate time for the world” as its mission, continuously launching all-scenario, high-precision RTC products, and striving to build a first-class RTC chip enterprise with global market competitiveness.