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| 型号： | ADE7753ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 41/60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
CALCULATE CFDEN VALUE FOR DESIGN
WRITE CFDEN VALUE TO CFDEN REGISTER
ADDR. 0x15 = CFDEN
The nominal LAENERGY reading, LAENERGY IB ( nominal ) , is the
LAENERGY reading with the test current applied. The
expected LAENERGY reading is calculated from the following
equation:
? CF IB ( expected ) × Accumulati on Time (s) ?
INT ? ?
? CFNUM + 1 ?
SET I TEST = I b , V TEST = V NOM , PF = 1
SET HALF LINECYCLES FOR ACCUMULATION
IN LINECYC REGISTER ADDR. 0x1C
LAENERGY IB ( expected ) =
? ?
? CFDEN + 1 ?
? × WDIV ?
(48)
SET MODE FOR LINE CYCLE
ACCUMULATION ADDR. 0x09 = 0x0080
ENABLE LINE CYCLE ACCUMULATION
INTERRUPT ADDR. 0x0A = 0x04
where CF IB ( expected ) (Hz) is calculated from Equation 34, accumula-
tion time is calculated from Equation 37, and the line period is
determined from the PERIOD register according to Equation 38.
For this example:
RESET THE INTERRUPT STATUS
READ REGISTER ADDR. 0x0C
Meter Constant:
= 3.2
Test Current:
Line Voltage:
MeterConstant (imp/Wh)
I b = 10 A
V nominal = 220 V
INTERRUPT?
YES
NO
Line Frequency:
Half Line Cycles:
CF Numerator:
CF Denominator:
f l = 50 Hz
LINECYC IB = 2000
CFNUM = 0
CFDEN = 489
RESET THE INTERRUPT STATUS
READ REGISTER ADDR. 0x0C
Energy Reading at Base Current:
LAENERGY IB ( nominal ) = 17174
Period Register Reading:
PERIOD = 8959
INTERRUPT?
NO
Clock Frequency:
CLKIN = 3.579545 MHz
CF expected is calculated to be 1.9556 Hz according to Equation 34.
LAENERGY expected is calculated to be 19186 using Equation 48.
YES
READ LINE ACCUMULATION ENERGY
ADDR. 0x04
CF IB ( expected ) (Hz) =
3. 200 imp/Wh × 220 V × 10 A
3600 s/h
× (cos( ? ) = 1.9556 Hz
CALCULATE WGAIN. SEE EQUATION 47.
LAENERGY IB ( expected ) =
? ? LAENERGY IB ( expected )
WGAIN = INT ? ?
? 1 ? × 2 12 ?
?
? ? LAENERGY IB ( nominal )
?
? CF IB ( expected ) × LINECYC IB / 2 × PERIOD × 8 / CLKIN ?
INT ? ?
? CFNUM + 1 ?
? 1 . 9556 × 2000 / 2 × 8959 × 8 /( 3 . 579545 × 10 ) ?
?
?
WRITE WGAIN VALUE TO THE WGAIN
REGISTER: ADDR. 0x12
02875-A-007
Figure 81. Calibrating Watt Gain Using an Accurate Source
Equation 47 describes the relationship between the expected
LAENERGY value and the LAENERGY measured in the test
condition:
? ?
(47)
? ? ? ?
? ?
? × WDIV ?
? CFDEN + 1 ?
LAENERGY IB ( expected ) =
? ?
INT ? ? 1 =
? 1 ?
? 489 + 1 ?
INT ( 19186 . 4 ) = 19186
WGAIN is calculated to be 480 using Equation 47.
6
WGAIN = INT ? ? ?
? 1 ? ? × 2 12 ? = 480
? 19186
? ? 17174
? ?
?
Note that WGAIN is a signed twos complement register.
With WDIV and CFNUM set to 0, LAENERGY can be
expressed as
Rev. C | Page 41 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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