参数资料
型号: 71M6533H-IGTR/F
厂商: Maxim Integrated
文件页数: 18/132页
文件大小: 0K
描述: IC ENERY METER 3PH 128K 100-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
系列: Single Converter Technology®
输入阻抗: 40 千欧 ~ 90 千欧
测量误差: 0.1%
电压 - 高输入/输出: 2V
电压 - 低输入/输出: 0.8V
电流 - 电源: 10mA
电源电压: 3 V ~ 3.6 V
测量仪表类型: 三相,中性相位
工作温度: -40°C ~ 85°C
安装类型: *
封装/外壳: *
供应商设备封装: *
包装: *
71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
833ms
20ms
XFER_BUSY
Interrupt to MPU
Figure 6: Accumulation Interval
Figure 6 shows the accumulation interval resulting from PRE_SAMPS[1:0] = 42 and SUM_CYCLES[5:0] = 50,
consisting of 2100 samples of 397μs each, followed by the XFER_BUSY interrupt. The sampling in this
example is applied to a 50 Hz signal.
There is no correlation between the line signal frequency and the choice of PRE_SAMPS[1:0] or
SUM_CYCLES[5:0] (even though when SUM_CYCLES[5:0] = 42, one set of SUM_CYCLES happens to
sample a period of 16.6 ms). Furthermore, sampling does not have to start when the line voltage crosses
the zero line, and the length of the accumulation interval need not be an integer multiple of the signal cycles.
1.3.6
Delay Compensation
t delay
When measuring the energy of a phase (i.e., Wh and VARh) in a service, the voltage and current for that
phase must be sampled at the same instant. Otherwise, the phase difference, Ф, introduces errors.
φ = ? 360 o = t delay ? f ? 360 o
T
Where f is the frequency of the input signal and t delay is the sampling delay between voltage and current.
In traditional meter ICs, sampling is accomplished by using two A/D converters per phase (one for voltage
and the other one for current) controlled to sample simultaneously. Our Single Converter Technology,
however, exploits the 32-bit signal processing capability of its CE to implement “constant delay” all-pass
filters. These all-pass filters correct for the conversion time difference between the voltage and the
corresponding current samples that are obtained with a single multiplexed A/D converter.
The “constant delay” all-pass filters provide a broad-band delay β that is precisely matched to the differ-
ence in sample time between the voltage and the current of a given phase. This digital filter does not
affect the amplitude of the signal, but provides a precisely controlled phase response. The delay
compensation implemented in the CE aligns the voltage samples with their corresponding current
samples by routing the voltage samples through the all-pass filter, thus delaying the voltage samples by
β , resulting in the residual phase error β – Ф . The residual phase error is negligible, and is typically less
than ±1.5 millidegrees at 100Hz, thus it does not contribute to errors in the energy measurements.
18
Rev 2
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相关代理商/技术参数
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71M6533-IGT/F 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6533-IGT/F1 功能描述:计量片上系统 - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6533-IGTR/F 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6533-IGTR/F1 功能描述:计量片上系统 - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6533-IGTR/F2 功能描述:计量片上系统 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel