参数资料
型号: 71M6511H-IGT/F
厂商: Maxim Integrated
文件页数: 69/98页
文件大小: 0K
描述: IC ENERGY METER RESIDENT 64-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 160
系列: *
71M6511/71M6511H
Single-Phase Energy Meter IC
A Maxim Integrated Products Brand
DATA SHEET
NOVEMBER 2010
Instantaneous Power Measurement Variables
The FREQSEL Register selects the input phase used for frequency measurement and for the MAIN_EDGE counter. The
frequency measurement is implemented using the frequency locked loop of the CE for the selected phase.
IxSQSUM_X and VxSQSUM are the squared current and voltage samples acquired during the last accumulation interval.
INSQSUM_X can be used for computing the neutral current.
CE
Address
33
Name
RESERVED
Description
Fundamental frequency.
2
41
FREQ_X
LSB
F S
32
≈ 0 . 587 ? 10 ? 6 Hz for MUX_DIV = 1
or
F S
2 32
≈ 0 . 763 ? 10 ? 6 Hz for MUX_DIV = 2
IMAX / In_8 A h ( for MUX_DIV = 2)
LSB = 5.1501*10
VMAX 2 V 2 h ( for MUX_DIV = 2)
LSB = 5.1501*10
4A
4B
4C
4D
4E
4F
50
I0SQSUM_X
I1SQSUM_X
RESERVED
RESERVED
V0SQSUM_X
RESERVED
RESERVED
The sum of squared current samples from each element.
LSB = 6.6952*10 -13 IMAX 2 / In_8 2 A 2 h (for MUX_DIV = 1)
-13 2 2 2
The sum of squared voltage samples from each element.
LSB= 6.6952*10 -13 VMAX 2 V 2 h (for MUX_DIV = 1)
-13
The RMS values can be computed by the MPU from the squared current and voltage samples as per the formulae:
Ix RMS =
IxSQSUM ? LSB ? 3600 ? F S
N ACC
Vx RMS =
VxSQSUM ? LSB ? 3600 ? F S
N ACC
Note: FS = 2520.6Hz ( MUX_DIV = 1) or 3276.8Hz ( MUX_DIV = 2)
Other Measurement Parameters
MAINEDGE_X is useful for implementing a real-time clock based on the input AC signal. MAINEDGE_X is the number of half-
cycles accounted for in the last accumulated interval for the AC signal of the phase specified in the FREQSEL register.
CE
Address
52
53
55
Name
RESERVED
RESERVED
MAINEDGE_X
Description
The number of edge crossings of the selected voltage in the previous
accumulation interval. Edge crossings are either direction and are de-
bounced.
Page: 69 of 98
? 2005–2010 Teridian Semiconductor Corporation
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