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參數(shù)資料
| 型號： | ADE7757AARZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, MS-012AC, SOIC-16 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 391K |
| 代理商： | ADE7757AARZ |
Preliminary Technical Data
ADE7757A
Rev. PrE | Page 19 of 24
NO-LOAD THRESHOLD
The ADE7757A also includes a no-load threshold and start-up
current feature that eliminates any creep effects in the meter.
The ADE7757A 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 0.00244%
for each of the F1–4 frequency selections (see Table 5).
For example, for an energy meter with a meter constant of
100 imp/kWh on F1, F2 using F3 (3.43 Hz), the minimum
output frequency at F1 or F2 would be 0.00244% of 3.43 Hz or
8.38 × 10–5 Hz. This would be 2.68 × 10–3 Hz at CF (32 × F1 Hz)
when SCF = S0 = 1, S1 = 0. In this example, the no-load
threshold would be equivalent to 3 W of load or a start-up
current of 13.72 mA at 220 V. Compare this value to the
IEC62053-21 specification which states that the meter must
start up with a load equal to or less than 0.4% Ib. For a
5 A (Ib) meter, 0.4% of Ib is equivalent to 20 mA.
NEGATIVE POWER INFORMATION
The ADE7757A detects when the current and voltage channels
have a phase shift greater than 90°. This mechanism can detect
wrong connection of the meter or generation of negative power.
The REVP pin output goes active high when negative power is
detected and active low if positive power is detected. The REVP
pin output changes state as a pulse is issued on CF.
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| ADE7757ARN | 制造商:Rochester Electronics LLC 功能描述:ENERGY METER IC W/INTEGRATED OSCILLATOR - Bulk 制造商:Analog Devices 功能描述:IC ENERGY METER |
| ADE7757ARN-REF | 制造商:Analog Devices 功能描述:REF BOARD ENERGY MTR W/INTGRATED OSCIL. - Rail/Tube |
| ADE7757ARNRL | 制造商:Analog Devices 功能描述:IC ENERGY METERING 16-SOIC TR |
| ADE7757ARNZ | 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7757ARNZRL | 功能描述:IC ENERGY METERING 1PHASE 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
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