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| 型号： | ADE7753ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 46/60页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 20SSOP |
| 标准包装： | 66 |
| 输入阻抗： | 390 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 2.4V |
| 电压 - 低输入/输出： | 0.8V |
| 电流 - 电源： | 3mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 797 (CN2011-ZH PDF) |
| 配用： | EVAL-ADE7753ZEB-ND - BOARD EVALUATION AD7753 |
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ADE7753
Voltage rms compensation is done after the LPF3 filter (see
Apparent Energy
Apparent energy gain calibration is provided for both meter-to-
VRMS = VRMS0 + VRMSOS
where:
(64)
meter gain adjustment and for setting the VAh/LSB constant.
VAENERGY =
× ? ? 1 +
?
VRMS0 is the rms measurement without offset correction.
VRMS is linear from full-scale to full-scale/20.
VAENERGY initial ×
1
VADIV
?
VAGAIN ?
2 12 ?
(68)
V 1 × VRMS 2 ? V 2 × VRMS 1
? V
? ? LVAENERGY IB ( expected )
VAGAIN = INT ? ?
? 1 ? × 2 12 ? (69)
? ? LVAENERGY IB ( nominal )
? ?
?
1 I 2 × IRMS 2 2 ? I 2 2 × IRMS 1 2
?
?
V nominal × I B
INT ? × Accumulati on time (s) ? (70)
constant × 3600 s/h
?
?
To calibrate the offset, two VRMS measurements are required,
for example, at V nominal and V nominal /10. V nominal is set at half of the
full-scale analog input range so the smallest linear VRMS
reading is at V nominal /10.
VRMSOS = (65)
V 2 1
where VRMS 1 and VRMS 2 are rms register values without offset
correction for input V 1 and V 2 , respectively.
If the range of the 12-bit, twos complement VRMSOS register is
not enough, the voltage channel offset register, CH2OS, can be
used to correct the VRMS offset.
Current rms compensation is performed before the square root:
IRMS 2 = IRMS0 2 + 32768 × IRMSOS (66)
where IRMS0 is the rms measurement without offset correction.
The current rms calculation is linear from full-scale to full-
scale/100.
To calibrate this offset, two IRMS measurements are required,
for example, at I b and I MAX /50. I MAX is set at half of the full-scale
analog input range so the smallest linear IRMS reading is at
I MAX /50.
IRMSOS = × 1 (67)
32768 I 2 2 ? I 1 2
where IRMS 1 and IRMS 2 are rms register values without offset
correction for input I 1 and I 2 , respectively.
VADIV is similar to the CFDEN for the watt hour calibration. It
should be the same across all meters and determines the VAh/LSB
constant. VAGAIN is used to calibrate individual meters.
Apparent energy gain calibration should be performed before
rms offset correction to make most efficient use of the current
test points. Apparent energy gain and watt gain compensation
require testing at I b while rms and watt offset correction require
a lower test current. Apparent energy gain calibration can be
done at the same time as the watt-hour gain calibration using
line cycle accumulation. In this case, LAENERGY and
LVAENERGY , the line cycle accumulation apparent energy
register, are both read following the line cycle accumulation
interrupt. Figure 87 shows a flowchart for calibrating active and
apparent energy simultaneously.
? ?
? ?
?
LVAENERGY IB ( expected ) =
? ?
? VAh ?
? LSB ?
The accumulation time is determined from Equation 37 and the
line period can be determined from the PERIOD register accord-
ing to Equation 38. The VAh represented by the VAENERGY
register is
VAh = VAENERGY × VAh / LSB constant
The VAh/LSB constant can be verified using this equation:
(71)
VAh
LSB constant =
VA ×
Accumulati on time (s)
LVAENERGY
3600 (72)
Rev. C | Page 46 of 60
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7753ARSZ | 制造商:Analog Devices 功能描述:ENERGY METERING IC |
| ADE7753ARSZ | 制造商:Analog Devices 功能描述:IC MULTIFUNCTION METER |
| ADE7753ARSZRL | 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:* |
| ADE7753-ARSZRL | 制造商:Analog Devices 功能描述: |
| ADE7753XRS | 制造商:Analog Devices 功能描述: |
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