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| 型号： | ADE7753ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 42/60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
LAENERGY IB ( expected ) =
INT ( CF IB ( expected ) × LINECYC IB / 2 × PERIOD × 8 / CLKIN × ( CFDEN + 1 ))
The calculated Wh/LSB ratio for the active energy register,
using Equation 39 is 6.378 × 10 ?4 :
Minimum Current:
Load at Minimum Current:
CF Error at Minimum Current:
CF Numerator:
CF Denominator:
I MIN = 40 mA
W IMIN = 9.6 W
% ERROR CF ( IMIN ) = 1.3%
CFNUM = 0
CFDEN = 489
LSB = 3 . 200 imp/Wh = 6 . 378 × 10
Wh
1
( 489 + 1 )
? 4
Clock Frequency: CLKIN = 3.579545 MHz
Using Equation 49, APOS is calculated to be ?522 for this
example.
Watt Offset
Offset calibration allows outstanding performance over a wide
dynamic range, for example, 1000:1. To do this calibration two
CF Absolute Error = CF IMIN ( nominal ) ? CF IMIN ( expected )
CF Absolute Error =
(50)
measurements are needed at unity power factor, one at I b and
the other at the lowest current to be corrected. Either
calibration frequency or line cycle accumulation measurements
can be used to determine the energy offset. Gain calibration
(% ERROR CF ( IMIN ) ) × W IMIN ×
MeterConst ant (imp/Wh)
3600
(51)
? 1 . 3 % ? × 9 . 6 × = 0 . 000110933 Hz
?
?
should be performed prior to offset calibration.
Offset calibration is performed by determining the active
energy error rate. Once the active energy error rate has been
determined, the value to write to the APOS register to correct
the offset is calculated.
CF Absolute Error =
3 . 200
? 100 ? 3600
Then,
CFNUM + 1
= 0 . 05436
AENERGY Error Rate × 2 35
APOS = ? (49)
CLKIN
The AENERGY registers update at a rate of CLKIN/4. The twos
complement APOS register provides a fine adjustment to the
active power calculation. It represents a fixed amount of power
offset to be adjusted every CLKIN/4. The 8 LSBs of the APOS
register are fractional such that one LSB of APOS represents
1/256 of the least significant bit of the internal active energy
register. Therefore, one LSB of the APOS register represents 2 ?33
AENERGY Error Rate (LSB/s) =
CFDEN + 1
CF Absolute Error ×
AENERGY Error Rate (LSB/s) =
490
0.000110933 ×
1
Using Equation 49, APOS is ?522.
(52)
of the AENERGY[23:0] active energy register.
The steps involved in determining the active energy error rate
APOS = ?
0 . 05436 × 2 35
3 . 579545 × 10 6
= ? 522
for both line accumulation and reference meter calibration
options are shown in the following sections.
Calibrating Watt Offset Using a Reference Meter Example
APOS can be represented as follows with CFNUM and WDIV
set at 0:
APOS =
with a reference meter.
SET I TEST = I MIN , V TEST = V NOM , PF = 1
?
(% ERROR CF ( IMIN ) ) × W IMIN ×
MeterConst ant (imp/Wh)
3600
CLKIN
× ( CFDEN + 1 ) × 2 35
MEASURE THE % ERROR BETWEEN THE
CF OUTPUT AND THE REFERENCE METER
OUTPUT, AND THE LOAD IN WATTS
CALCULATE APOS. SEE EQUATION 49.
WRITE APOS VALUE TO THE APOS
REGISTER: ADDR. 0x11
02875-A-008
Figure 82. Calibrating Watt Offset Using a Reference Meter
For this example:
Meter Constant:
MeterConstant (imp/Wh) = 3.2
Rev. C | Page 42 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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