參數(shù)資料
型號： ADE7763ARS
廠商： ANALOG DEVICES INC
元件分類： 電源管理
英文描述： Single-Phase Active and Apparent Energy Metering IC
中文描述： 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
封裝： MO-150AE, SSOP-20
文件頁數(shù)： 15/56頁
文件大小： 1328K
代理商： ADE7763ARS
ADE7763
Rev. A | Page 15 of 56
FREQUENCY (Hz)
10
2
10
3
0
–88.0
P
–88.5
–89.0
–89.5
–90.0
–90.5
Figure 29. Combined Phase Response of the
Digital Integrator and Phase Compensator
FREQUENCY (Hz)
–1.0
–6.040
70
45
G
50
55
60
65
–1.5
–2.0
–2.5
–3.5
–4.5
–5.5
–3.0
–4.0
–5.0
0
Figure 30. Combined Gain Response of the
Digital Integrator and Phase Compensator (40 Hz to 70 Hz)
–89.75
–89.80
–89.85
–89.90
–89.95
–90.00
FREQUENCY (Hz)
P
40
45
70
50
55
60
65
–90.05
–90.10
–89.70
0
Figure 31. Combined Phase Response of the
Digital Integrator and Phase Compensator (40 Hz to 70 Hz)
Note that the integrator has a –20 dB/dec attenuation and
approximately a –90° phase shift. When combined with a di/dt
sensor, the resulting magnitude and phase response should be a
flat gain over the frequency band of interest. The di/dt sensor
has a 20 dB/dec gain. It also generates significant high
frequency noise, necessitating a more effective antialiasing filter
to avoid noise due to aliasing—see the Antialias Filter section.
When the digital integrator is switched off, the ADE7763 can be
used directly with a conventional current sensor such as a current
transformer (CT) or with a low resistance current shunt.
ZERO-CROSSING DETECTION
The ADE7763 has a zero-crossing detection circuit on Channel 2.
This zero crossing is used to produce an external zero-crossing
signal (ZX), which is used in the calibration mode (see the
Calibrating an Energy Meter section). This signal is also used to
initiate a temperature measurement (see the Temperature
Measurement section).
Figure 32 shows how the zero-crossing signal is generated from
the output of LPF1.
×
1,
×
2,
×
1,
×
8,
×
16
{GAIN[7:5]}
ADC 2
REFERENCE
1
LPF1
f
–
3dB
= 140Hz
–63%TO +63% FS
PGA2
V2P
V2N
V2
ZERO
CROSSING
ZX
TO
MULTIPLIER
2.32° @ 60Hz
1.0
0.93
ZX
V2
LPF1
0
Figure 32. Zero-Crossing Detection on Channel 2
The ZX signal goes logic high upon a positive-going zero
crossing and logic low upon a negative-going zero crossing on
Channel 2. The ZX signal is generated from the output of LPF1.
LPF1 has a single pole at 140 Hz (@ CLKIN = 3.579545 MHz).
As a result, there is a phase lag between the analog input signal
V2 and the output of LPF1. The phase response of this filter is
shown in the Channel 2 Sampling section. The phase lag response
of LPF1 results in a time delay of approximately 1.14 ms
(@ 60 Hz) between the zero crossing on the analog inputs of
Channel 2 and the rising or falling edge of ZX.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADE7763ARSRL 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R
ADE7763ARSZ 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(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:*
ADE7763ARSZ 制造商:Analog Devices 功能描述:IC, SINGLE PHASE ENERGY METER, SSOP-20
ADE7763ARSZRL 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(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:*
ADE7763ARSZRL 制造商:Analog Devices 功能描述:IC, SINGLE PHASE ENERGY METER, SSOP-20
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