欢迎访问ic37.com |
会员登录 免费注册
发布采购

78M6610LMU 参数 Datasheet PDF下载

78M6610LMU图片预览
型号: 78M6610LMU
PDF下载: 下载PDF文件 查看货源
内容描述: 电能计量处理器的负荷监测单位 [Energy Measurement Processor for Load Monitoring Units]
分类和应用: 监控
文件页数/大小: 63 页 / 1710 K
品牌: MAXIM [ MAXIM INTEGRATED PRODUCTS ]
 浏览型号78M6610LMU的Datasheet PDF文件第26页浏览型号78M6610LMU的Datasheet PDF文件第27页浏览型号78M6610LMU的Datasheet PDF文件第28页浏览型号78M6610LMU的Datasheet PDF文件第29页浏览型号78M6610LMU的Datasheet PDF文件第31页浏览型号78M6610LMU的Datasheet PDF文件第32页浏览型号78M6610LMU的Datasheet PDF文件第33页浏览型号78M6610LMU的Datasheet PDF文件第34页  
78M6610+LMU Data Sheet  
RMS Current  
The 78M6610+LMU reports true RMS measurements for current inputs. The RMS current is obtained by  
performing the sum of the squares of the instantaneous current samples over the accumulation interval  
and then performing a square root of the result after dividing by the number of samples in the interval.  
An optional “RMS offset” for the current channels can be adjusted to reduce errors due to noise or system  
offsets (crosstalk) exhibited at low input amplitudes. Full scale values in the IxRMS_OFFS registers are  
squared and subtracted from the accumulated/divided squares. If the resulting RMS value is negative,  
zero is used.  
IxRMS_OFF2  
Instantaneous  
N-1  
Current (Ix)  
Ix2_SUM  
Ix2  
X
Ix_RMS  
N
n=0  
Figure 20. RMS Current Computation  
Minimum Current  
The device includes a squelch feature to report zero current for no-load conditions. When the RMS  
current value (checked at each accumulation interval) falls below the threshold (IRMS_MIN), the device  
will report zero current and prevent the continued accumulation of energy.  
Register  
Description  
If measured Ix_RMS is less than value in IRMS_MIN, then Ix_RMS  
is squelched and energy accumulation stops  
IRMS_MIN  
Crest Factor  
The crest factor outputs capture the result of the equation Ix_CREST = Ix_PEAK / Ix_RMS for the most  
recent accumulation interval. They have a range of 0 to 256.  
30  
Rev 0