参数资料
型号: 71M6513H-IGTR/F
厂商: Maxim Integrated
文件页数: 14/104页
文件大小: 0K
描述: IC ENERGY METER 3PH 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®
测量误差: 0.1%
电源电压: 3 V ~ 3.6 V
测量仪表类型: 3 相
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-LQFP
供应商设备封装: 100-LQFP(14x14)
包装: 带卷 (TR)
71M6513/71M6513H
A Maxim Integrated Products Brand
3 -Phase      Energy Meter IC
DATA SHEET
AUGUST 2011
1/2520.6Hz = 397μs
B
IB
VB
IC
2/32768Hz =
61.04μs
A
IA
VA
VC
C
13/32768Hz = 397μs
per mux cycle
Figure 4: Samples in Multiplexer Cycle
The end of each multiplexer cycle is signaled to the MPU by the CE_BUSY interrupt. At the end of each multiplexer cycle,
status information, such as sag data and the digitized input signal, is available to the MPU.
833ms
20ms
XFER_BUSY
Interrupt to MPU
Figure 5: Accumulation Interval
Figure 5 shows the accumulation interval resulting from PRE_SAMPS = 42 and SUM_CYCLES = 50, consisting of 2100 samples
of 397μs each (only one phase is shown) followed by the XFER_BUSY interrupt. The sampling in this example is applied to a
50Hz signal.
There is no correlation between the line signal frequency and the choice of PRE_SAMPS or SUM_CYCLES ( even though when
SUM_CYCLES = 42 one set of SUM_CYCLES happens to sample a period of 16.6ms). Furthermore, sampling does not have to
start when the line voltage crosses the zero line.
Delay Compensation
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. Otherwi se, the phase difference, Ф, introduces errors.
Page: 14 of 104
? 2005-2011 Teridian Semiconductor Corporation
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