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首页 > Products > MCU Memory ADC Clock  > MCU > Energy Measurement ASIC >Cxem2303 integrated circuit is the core chip of the electronic watt hour meter The electronic watt hour meter designed based on this chip has the characteristics of simple peripheral circuit
Cxem2303 integrated circuit is the core chip of the electronic watt hour meter The electronic watt hour meter designed based on this chip has the characteristics of simple peripheral circuit

It is applicable to the electric energy measurement of single-phase two wire power users. Cxem2303 can be used to make a single-phase electronic watt hour meter with anti stealing function. This kind of watt hour meter is measured in the same direction

Cxem2303 integrated circuit is the core chip of the electronic watt hour meter The electronic watt hour meter designed based on this chip has the characteristics of simple peripheral circuit
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目录Hmq嘉泰姆

   1.产品概述           2.产品特点         3.应用范围         4.技术规格书下载(PDF文档)Hmq嘉泰姆

    5.产品封装图        6.电路原理图      7.相关产品Hmq嘉泰姆

一.产品概述  Hmq嘉泰姆


     CXEM2303 集成电路是电子电度表的核心芯片,基于此芯片设计的电子电度表具有外围电路简单、精度高、稳定性好等特点,适用于单相两线电力用户的电能计量。利用 CXEM2303 可以制成单相反窃电功能的电子电度表,这种电度表以同一方向计量计算正向或负向的有功功率,累计用电量。Hmq嘉泰姆

 CXEM2303 具有两个电流采样端,分别采样火线和零线电流,当电流误差超过 12.5%时,表明有窃电行为或错误接线,Pin12 (FAULT)发出指示信号,并按照两个电流中大的一个电流值计量。Hmq嘉泰姆

 CXEM2303 基于数字信号处理,有测量负向有功功率的功能。它能把负向有功功率转换成与正向有功功率方向一致的脉冲输出。Pin14(CF)输出较高频率的脉冲,用于计量和计算机数据处理,Pin16(F1)和 Pin15(F2)输出较低频率的脉冲用于驱动脉冲电机,间接驱动机械字轮计度器,记录用电量。在测量负向功率时 Pin13(REVP)有负电平输出,用于指示该时的功率为负方向。Hmq嘉泰姆

 CXEM2303 着重考虑了校表过程中读数误差的稳定 性 的 需 求 , 成 品 测 量 数 据 表 明 在 小 信 号 5%IbHmq嘉泰姆

( Ib=5A) 情 况 下 输 出 校 表 脉 冲 信 号 的 稳 定 度 在0.1%以内。Hmq嘉泰姆

二.产品特点Hmq嘉泰姆


.高精度,在输入动态工作范围(500:1)内,非线性测量误差小于 0.1% .校表过程中高稳定性,输出频率波动小于 0.1%Hmq嘉泰姆

.精确测量正、负两个方向的有功功率,且以同一方向计算电能有两个电流采样端,分别采样火线和零线电流,取两个电流采样Hmq嘉泰姆

 端中的较大值作为计量,即使在错误用电时电流通道增益可变,在电流通道输入端可以使用小的分流电阻慢速输出脉冲能直Hmq嘉泰姆

接驱动电机工作,快速输出脉冲可用于计算机数据处理防窃电功能,逻辑输出脚 REVP、FAULT 用于显示反向用电或者错误用Hmq嘉泰姆

电状况芯片上有电压检测电路,检测掉电状况具有防潜动功能芯片上带参考电压源 2.5V±8%(温度系数典型值 30ppm/℃),也可以使用外部电压源片上内置时钟晶振单工作电源 5V 低功耗 25mW(典型值)采用 0.35um CMOS 工艺,批量的一致性和产品可靠性得到进一步提高。Hmq嘉泰姆

三.应用范围    Hmq嘉泰姆


电表Hmq嘉泰姆

四.技术规格书(产品PDF)    Hmq嘉泰姆


需要详细的PDF规格书请扫一扫微信联系我们Hmq嘉泰姆

 QQ截图20160419174301.jpgHmq嘉泰姆

五.产品封装图Hmq嘉泰姆


    image.pngHmq嘉泰姆

六.电路原理图   Hmq嘉泰姆


 QQ截图20160420104811.jpgHmq嘉泰姆

七.相关芯片选择指南Hmq嘉泰姆


电能计量专用电路(Energy Measurement ASIC)
Part No. Meter Measurement Power Consumption Anti-Tamper Output Clock VDD Package
CXEM2303 Single Active 20mW 2 Channels Pulse Internal 5V SOP16
CXEM2304E Single Active 3000:1 15mW Reverse Indication Pulse Internal 5V SOP16
CXEM2305 Single Multifunction (Active, I, V, P.) 6mW   Pulse Internal 3.3V SOP8
CXEM2306A Single Active 15mW 2 Channels Pulse 3.58MHz 5V SSOP24
CXEM2307E Single Active 15mW Reverse Indication Pulse 3.58MHz 5V SSOP24
CXEM2308B Single Multifunction (Active   5000:1, I, V, P, S, PF, Freq.) 25mW 3 Channels Pulse, SPI 3.58MHz 5V SSOP24
CXEM2308GX Single Multifunction (Active 6000:1, I, V,   P, S, PF, Freq.) 20mW 3 Channels Pulse, UART 3.58MHz 5V SOP16
CXEM2309B Single Multifunction (Active 5000:1, I, V, P, S, PF, Freq.) 25mW Reverse Indication Pulse, SPI 3.58MHz 5V SOP16
CXEM2310A Single Multifunction (Active 3000:1, Reactive 3000:1, I, V, P,   S, PF, Freq.) 25mW 2 Channels Pulse, SPI/UART 3.58MHz 5V SSOP24
CXEM2310B Single Multifunction (Active 3000:1, Reactive 3000:1, I, V, P,   S, PF, Freq.) 25mW 2 Channels Pulse, SPI 3.58MHz 5V SSOP20
CXEM2311 Three Active 3000:1 25mW Reverse Indication By Any Pulse 2.5~4MHz 5V SOP24
CXEM2312C Three Active 3000:1 25mW Reverse Indication By Any Pulse 2.5~4MHz 5V SOP24
CXEM2313B Three Multifunction (Active   3000:1, Reactive 3000:1, I, V, P, Q, S, PF, Freq ) 30mW Reverse Indication By   Any 2Pulse,SPI 3.58MHz 3.3V LQFP44