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| 型号： | ADE7753ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 43/60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
Calibrating Watt Offset with an Accurate Source Example
accurate source.
SET I TEST = I MIN , V TEST = V NOM , PF = 1
LAENERGY IMIN ( nominal ) = 1395
The LAENERGY expected at I MIN is 1370 using Equation 53.
LAENERGY IMIN ( expected ) =
INT ? ? MIN × LAENERGY IB ( expected ) ×
? (53)
?
SET HALF LINE CYCLES FOR ACCUMULATION
IN LINECYC REGISTER ADDR. 0x1C
SET MODE FOR LINE CYCLE
? I
? I B
LAENERGY IMIN ( expected ) =
LINECYCI MIN
LINECYC IB
?
?
INT ? ?
? = INT ( 1369 . 80 ) = 1370
ACCUMULATION ADDR. 0x09 = 0x0080
ENABLE LINE CYCLE ACCUMULATION
0. 04
? 10
× 19186 ×
35700 ?
2000 ?
INTERRUPT ADDR. 0x0A = 0x04
RESET THE INTERRUPT STATUS
READ REGISTER ADDR. 0x0C
where:
LAENERGY IB ( expected ) is the expected LAENERGY reading at I b
from the watt gain calibration.
LINECYC IMIN is the number of half line cycles that energy is
accumulated over when measuring at I MIN .
INTERRUPT?
NO
More line cycles could be required at the minimum current to
minimize the effect of quantization error on the offset calibration.
YES
RESET THE INTERRUPT STATUS
READ REGISTER ADDR. 0x0C
For example, if a test current of 40 mA results in an active energy
accumulation of 113 after 2000 half line cycles, one LSB variation
in this reading represents an 0.8% error. This measurement
does not provide enough resolution to calibrate out a <1% offset
INTERRUPT?
NO
error. However, if the active energy is accumulated over 37,500
half line cycles, one LSB variation results in 0.05% error, reducing
the quantization error.
YES
READ LINE ACCUMULATION ENERGY
APOS is ? 672 using Equations 55 and 49.
ADDR. 0x04
LAENERGY Absolute Error =
CALCULATE APOS. SEE EQUATION 49.
LAENERGY IMIN ( nominal ) ? LAENERGY IMIN ( expected )
WRITE APOS VALUE TO THE APOS
LAENERGY Absolute Error = 1395 ? 1370 = 25
(54)
REGISTER: ADDR. 0x11
AENERGY Error Rate (LSB/s) =
×
25 3 . 579545 × 10 6
02875-A-009
Figure 83. Calibrating Watt Offset with an Accurate Source
For this example:
Meter Constant: MeterConstant (imp/Wh)
= 3.2
Line Voltage: V nominal = 220 V
LAENERGY Absolute Error CLKIN
LINECYC / 2 8 × PERIOD
AENERGY Error Rate (LSB/s) =
× = 0 . 069948771
35700 / 2 8 × 8959
(55)
= ? 672
Line Frequency: f l = 50 Hz
CF Numerator: CFNUM = 0
CF Denominator: CFDEN = 489
Base Current: I b = 10 A
Half Line Cycles Used at Base Current:
LINECYC ( IB ) = 2000
Period Register Reading:
PERIOD = 8959
CLKIN = 3.579545 MHz
Clock Frequency:
Expected LAENERGY Register Value at Base Current
(from the Watt Gain section): LAENERGY IB ( expected ) = 19186
Minimum Current:
I MIN = 40 mA
Number of Half Line Cycles used at Minimum Current:
LINECYC ( IMIN ) =
35700
Active energy Reading at Minimum Current:
Rev. C | Page 43 of 60
APOS = ?
APOS = ?
AENERGY Error Rate × 2 35
CLKIN
0 . 069948771 × 2 35
3 . 579545 × 10 6
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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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