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参数资料
| 型号： | ADE7761AARSZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 20SSOP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1,500 |
| 输入阻抗： | 400 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： | 带卷 (TR) |
ADE7761A
must start up with a load equal to or less than 0.4% of I B . For a
5 A (I B ) meter, 0.4% of I B is equivalent to 20 mA.
Looking at Table 10, the closest frequency to 0.266 Hz
in Column 4 is 0.17 Hz. Therefore, F2 (3.4 Hz; see Table 6) is
selected for this design.
Frequency Outputs
Figure 2 is a timing diagram for the various frequency outputs.
The high frequency CF output is intended for communication
and calibration purposes. CF produces a 90 ms wide, active
high pulse (t 4 ) at a frequency that is proportional to active
power. The CF output frequencies are given in Table 8. As with
F1 and F2, if the period of CF (t 5 ) falls below 180 ms, the CF
pulse width is set to half the period. For example, if the CF
frequency is 20 Hz, the CF pulse width is 25 ms.
No-Load Threshold
The ADE7761A includes a no-load threshold and start-up
current feature that eliminates creep effects in the meter. The
ADE7761A is designed to issue a minimum output frequency.
Any load generating a frequency lower than this minimum
frequency does not cause a pulse to be issued on F1, F2, or CF.
The minimum output frequency is given as 0.0045% of the full-
scale output frequency. (See Table 8 for maximum output
frequencies for ac signals).
For example, an energy meter with a meter constant of
100 impulses per kWh on F1, F2 using SCF = 1, S1 = 0, and
S0 = 1, the maximum output frequency at F1 or F2 is 0.68 Hz
and 43.52 Hz on CF. The minimum output frequency at F1
or F2 is 0.0045% of 0.68 Hz or 3.06 × 10 –5 Hz. This is 1.96 ×
10 –3 Hz at CF (64 × F1 Hz).
In this example, the no-load threshold is equivalent to 1.1 W of
load or a startup current of 4.6 mA at 240 V. Compare this value
to the IEC 32053-21 specification, which states that the meter
B
B B
Note that the no-load threshold is not enabled when using the
high CF frequency mode: SCF = 0, S1 = S0 = 1.
NEGATIVE POWER INFORMATION
The ADE7761A detects when the current and voltage channels
have a phase shift greater than 90 ° . This mechanism can detect
a wrong connection of the meter or the generation of negative
power. The REVP pin output goes active high when negative
power is detected and active low when positive power is
detected. The REVP pin output changes state as a pulse is
issued on CF.
Rev. 0 | Page 22 of 24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7761ARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADE7761ARS-REF | 制造商:Analog Devices 功能描述:ENERGY METER IC W/FAULT&MNEUT DETEC. - Bulk |
| ADE7761ARSRL | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761B | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761BARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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