- 您现在的位置：买卖IC网 > PDF目录20638 > ADE7754ARZ (Analog Devices Inc)IC ENERGY METERING 3PHASE 24SOIC PDF资料下载
参数资料
| 型号： | ADE7754ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 26/44页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 3PHASE 24SOIC |
| 标准包装： | 31 |
| 输入阻抗： | 370 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： | 7mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 测量仪表类型： | 3 相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 797 (CN2011-ZH PDF) |
| 配用： | EVAL-ADE7754EBZ-ND - BOARD EVALAUTION FOR ADE7754 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页当前第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页
ADE7754
APPARENT ENERGY CALCULATION
VAENERGY[23:0]
The apparent energy is given as the integral of the apparent
power.
7F,FFFFh
AVAG = BVAG = CVAG = 3FFh
AVAG = BVAG = CVAG = 000h
Apparent Energy = ∫ Apparent Power ( t ) dt
(21)
3F,FFFFh
AVAG = BVAG = CVAG = 800h
The ADE7754 achieves the integration of the apparent power
signal by continuously accumulating the apparent power signal
00,0000h
65.5
131
196.5 262
327. 5 393
in an internal nonreadable 49-bit register. The apparent energy
register (VAENERGY[23:0]) represents the upper 24 bits of
this internal register. This discrete time accumulation or summa-
40,0000h
tion is equivalent to integration in continuous time. Equation 22
expresses the relationship, where n is the discrete time sample
80,0000h
TIME (sec)
number and T is the sample period.
Figure 38. Energy Register Roll Over Time for Full-
?
?
∑
Apparent Energy = Lim ?
? ?
?
∞
T → 0 n = 0
?
Apparent Power ( nT ) × T ? (22)
? ?
Scale Power (Minimum and Maximum Power Gain)
Note that the apparent energy register contents roll over to full-
scale negative (80,0000h) and continue increasing in value when
the power or energy flow is positive, as shown in Figure 38. By
The discrete time sample period ( T) for the accumulation regis-
ter in the ADE7754 is 1.2 μ s (12/10 MHz).
Figure 37 shows a graphical representation of this discrete
time integration or accumulation. The apparent power signal
is continuously added to the internal register. This addition is
a signed addition even if the apparent energy theoretically
always remains positive.
VAENERGY[23:0]
using the interrupt enable register, the ADE7754 can be config-
ured to issue an interrupt (IRQ ) when the apparent energy
register is half full (positive or negative).
Integration Times under Steady Load
As described in the preceding section, the discrete time sample
period (T) for the accumulation register is 1.2 μ s (12/CLKIN).
With full-scale sinusoidal signals on the analog inputs and the
VA gain registers set to 000h, the average word value from each
apparent power stage is D1B71h. See the Apparent Power
23
48
VADIV
%
0
0
Calculation section. The maximum value that can be stored in
the apparent energy register before it overflows is 22 3 – 1 or
FF,FFFFh. As the average word value is added to the internal
register that can store 24 8 – 1 or FFFF,FFFF,FFFFh before it
overflows, the integration time under these conditions with
VADIV = 0 is calculated as follows:
TOTAL APPARENT POWER
T
+
48
0
Time =
FFFF , FFFF , FFFFh
3 × D 1 B 71 h
× 1 . 2 μ s = 131 s = 2 min 11 s
APPARENT POWER
+
When VADIV is set to a value different from 0, the integration
time varies as shown in Equation 23.
T
SIGNAL – P
TOTAL APPARENT POWER IS
ACCUMULATED (INTEGRATED) IN
Time = Time WDIV = 0 × VADIV
(23)
D1B71h
THE APPARENT ENERGY REGISTER
LINE APPARENT ENERGY ACCUMULATION
00000h
TIME (nT)
Figure 37. Apparent Energy Calculation
The upper 49-bit value of the internal register is divided by
VADIV. If the value in the VADIV register is 0, then the internal
active energy register is divided by 1. VADIV is an 8-bit unsigned
register. The upper 24-bit values are then written in the 24-bit
apparent energy register (VAENERGY[23:0]). RVAENERGY
register (24 bits long) is provided to read the apparent energy. This
register is reset to 0 after a read operation.
Figure 38 shows this apparent energy accumulation for full-scale
(sinusoidal) signals on the analog inputs. The three curves illus-
trate the minimum time it takes the energy register to roll over
when the individual VA gain registers contents all equal 3FFh,
000h, and 800h. The VA gain registers are used to carry out an
apparent power calibration in the ADE7754. The fastest integra-
tion time occurs when the VA gain registers are set to maximum
full scale (i.e., 3FFh).
The ADE7754 is designed with a special apparent energy accu-
mulation mode that simplifies the calibration process. By using
the on-chip zero-crossing detection, the ADE7754 accumulates
the apparent power signal in the LVAENERGY register for an
integral number of half cycles, as shown in Figure 39. The line
apparent energy accumulation mode is always active.
Each of three zero-crossing detection phases can contribute to
the accumulation of the half line cycles. Phase A, B, and C zero
crossings are taken into account when counting the number of
half line cycles by setting Bits 4 to 6 of the MMODE register to
Logic 1. Selecting phases for the zero-crossing counting also has
the effect of enabling the zero-crossing detection, zero-crossing
timeout, and period measurement for the corresponding phase
as described in the zero-crossing detection paragraph.
–26 –
REV. 0
相关PDF资料 |
PDF描述 |
|---|---|
| MAX8631YETI+ | IC LED DRVR WHITE BCKLGT 28-TQFN |
| EBC15DCMI-S288 | CONN EDGECARD 30POS .100 EXTEND |
| ISL6605IRZ-T | IC MOSFET DRVR SYNC BUCK 8-QFN |
| VI-J6F-CX-F1 | CONVERTER MOD DC/DC 72V 75W |
| PX3511BDAG-R3 | IC DRVR SYNC BUCK HF 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7754ARZRL | 功能描述:IC ENERGY METERING 3PHASE 24SOIC 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:* |
| ADE7755 | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Pulse Output |
| ADE7755AARSRL | 制造商:Analog Devices 功能描述:ENERGY METERING IC WITH P - Tape and Reel |
| ADE7755AN | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADE7755AN-REF | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Pulse Output |
发布紧急采购，3分钟左右您将得到回复。