功率测量

Why choose an AFE over an SOC in your Energy Measurement Solution?

为了节省公用设施费用并最大限度地降低对环境的影响,消费者和企业都在寻求各种方法来减少能源使用。设备级数据可以帮助用户更好地了解他们的能源使用情况,并帮助他们就如何优化能源消耗做出明智的决定。我们将推出很多产品,用于以方便、易用的形式测量能源并提供有价值的使用情况信息。

Cirrus Logic 从 1999 年开始生产用于公用设施仪表的能源测量 IC 卡,并利用这一经验为新一代产品提供高精度、低成本且易于使用的解决方案。

  • Types of Applications
  • Utility Meter
  • Smart Appliances
  • Smart Plugs/Strips
  • Smart Power Supply

Utility Meter

Cirrus Logic AFEs enable the cost-effective deployment of high-accuracy smart meters that have directly contributed to the development of smart grids throughout the world.

  • Highest Accuracy: Our accuracy performance is very flat over a long range, and ultra-low noise level and high SNR make us the market leader in accuracy.
  • Low Cost: Optimizing die sizes, building our devices as hard coded ROMs, avoiding expensive flash memory and designing AFEs using cost optimized process technology reduces expenses.
  • Fast Calibration: Due to our superior analog performance, offset correction is very fast. With a calibration time of 2-3 seconds, we are up to 10 times quicker than many competing SOC solutions, which significantly speeds production.
  • Flexibility: Cirrus’ AFE approach allows the customers to lock in the metrology portion of their designs across the globe and free up their designers to focus on selecting the appropriate MCU to satisfy the local requirements for communications, LCD drive, IO etc.
  • Ease of Use: Pre-programmed power calculation engine eliminates any need for manual programming and also mitigates security concerns.

Smart Appliances

To effectively monitor energy usage within the home, consumers need to understand how their appliances — washing machines, dryers, refrigerators, etc., — consume electricity. If consumers can, in effect, itemize the consumption, they are empowered with the knowledge to make informed decisions to better manage and optimize overall consumption habits or even perhaps remedy a malfunctioning device: Is the refrigerator consuming unusually large amounts of electricity? Perhaps the motor is breaking down and needs replacing? If my utility has reduced per-kilowatt-hour pricing at night, perhaps it’s less expensive to operate the dryer during that time?

Smart appliances are able to monitor and report energy consumption, perform advanced diagnostics based on energy use, automatically respond to utility signals for time-of-use rate changes and service malfunctioning devices. These functions provide cost savings to utilities as well as consumers.

Smart Plugs/Strips

Smart plugs and smart powerstrips were, until recent years, unknown consumer devices. These products are a rapidly growing segment of the energy measurement market that is being driven by consumers seeking real-time information about the electricity usage of household products: computers, displays, cable boxes, home theater systems, lamps, etc.

Via optimized remote on-off control, they enable a reduction in overall energy consumption. Some smart plugs/ smart strips use wireless communication, such as Zigbee or Wi-Fi, to connect to a USB hub that plugs into a home or office computer and compile information from measuring the various devices within the home. In addition, this hub can provide automation to reduce consumption by automatically turning off unused loads.

Low-cost AFE solutions from Cirrus Logic are critical components to meet the cost-sensitive and rapidly-changing requirements of the consumer market.

Smart Power Supply

Smart power supply monitoring systems are designed for measuring and relaying energy usage information in high-performance systems such as servers, telecommunications racks, storage racks and PCs. Continuously increasing demand for computer resources such as cloud computing has resulted in exponential growth in the number of data center servers.

Cirrus Logic understands the challenge this presents to IT managers and equipment manufacturers, and through its portfolio of energy measurement ICs, it partners with them to create green data centers through energy efficient solutions such as power-managed servers.

Cirrus’ new CS548X/9X family features built-in calculations and very fast calibration, which speeds production cycles and enables customers to use low-cost manufacturing locations.

Cirrus’ components enable extremely accurate measurement of energy consumption, allowing data centers to optimize server utilization for efficiency and better return on investment.


  • 最高精确度
  • 最低底噪
  • 每个测量通道的专用 ADC(模数转换器)
  • 最佳的功率计算精确度
  • 寄存器完全访问所有瞬时值和计算值
  • 市场上成本最低的 AFE
  • 灵活地与 MCU 进行恰如其分的配对以获取需要的内存、IO、处理功率和板载驱动器 -- OEM 不会浪费任何 SOC 功能

Analog Front End

支持的产品
  • CS5490
    Two Channel Energy Measurement IC
  • CS5480
    Three Channel Energy Measurement IC
  • CS5484
    Four Channel Energy Measurement IC
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