參數資料
型號： ADE7758ARWZRL
廠商： ANALOG DEVICES INC
元件分類： 模擬信號調理
英文描述： Poly Phase Multifunction Energy Metering IC with Per Phase Information
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO24
封裝： LEAD FREE, MS-013-AD, SOIC-24
文件頁數： 21/68頁
文件大小： 1584K
代理商： ADE7758ARWZRL
ADE7758
di/dt CURRENT SENSOR AND DIGITAL
INTEGRATOR
The di/dt sensor detects changes in the magnetic field caused by
the ac current. Figure 42 shows the principle of a di/dt current
sensor.
Rev. A | Page 21 of 68
0
MAGNETIC FIELD CREATED BY CURRENT
(DIRECTLY PROPORTIONAL TO CURRENT)
+ EMF (ELECTROMOTIVE FORCE)
– INDUCED BY CHANGES IN
MAGNETIC FLUX DENSITY (di/dt)
Figure 42. Principle of a di/dt Current Sensor
The flux density of a magnetic field induced by a current is
directly proportional to the magnitude of the current. The
changes in the magnetic flux density passing through a conductor
loop generate an electromotive force (EMF) between the two
ends of the loop. The EMF is a voltage signal that is proportional
to the di/dt of the current. The voltage output from the di/dt
current sensor is determined by the mutual inductance between
the current carrying conductor and the di/dt sensor.
The current signal needs to be recovered from the di/dt signal
before it can be used. An integrator is therefore necessary to
restore the signal to its original form. The ADE7758 has a built-
in digital integrator to recover the current signal from the di/dt
sensor. The digital integrator on Channel 1 is switched on by
default when the ADE7758 is powered up. Setting the MSB of
the GAIN[7:0] register turns on the integrator. Figure 43 to
Figure 46 show the magnitude and phase response of the digital
integrator.
0
10
100
1k
10k
20
–50
–40
–30
–20
–10
0
10
FREQUENCY (Hz)
G
Figure 43. Combined Gain Response of the
Digital Integrator and Phase Compensator
0
10
100
1k
10k
80
91
90
89
88
87
86
85
84
83
82
81
FREQUENCY (Hz)
P
Figure 44. Combined Phase Response of the
Digital Integrator and Phase Compensator
0
40
70
65
60
55
50
45
5
–1
0
1
2
3
4
FREQUENCY (Hz)
M
Figure 45. Combined Gain Response of the
Digital Integrator and Phase Compensator (40 Hz to 70 Hz)
0
40
70
65
60
55
50
45
89.80
90.10
90.05
90.00
89.95
89.90
89.85
FREQUENCY (Hz)
P
Figure 46. Combined Phase Response of the
Digital Integrator and Phase Compensator (40 Hz to 70 Hz)
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相關代理商/技術參數
參數描述
ADE7759 制造商:AD 制造商全稱:Analog Devices 功能描述:Active Energy Metering IC with di/dt Sensor Interface
ADE7759ARS 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:*
ADE7759ARSRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:*
ADE7759ARSZ 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:*
ADE7759ARSZRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測量 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:*
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