參數(shù)資料
型號(hào)： ADE7761ARSRL
廠商： ANALOG DEVICES INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Energy Metering IC with On-Chip Fault and Missing Neutral Detection
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO20
封裝： MO-150AE, SSOP-20
文件頁數(shù)： 22/28頁
文件大?。?/td> 302K
代理商： ADE7761ARSRL
ADE7761
The ADE7761 leaves the missing neutral mode for normal
operation when both conditions are no longer valid—voltage
peak value greater than 9% of full scale and zero crossing on the
voltage channel detected (see Figure 32).
Rev. A | Page 22 of 28
0
FILTER AND
THRESHOLD
V2
V
2P
V
2N
AGND
ADC
MISSING
NEUTRAL
|V2|
PEAK
> 9% OF FULL SCALE
AND
ZERO-CROSSING ON V2
FS
+9% OF FS
–9% OF FS
V
2P
–V
2N
Figure 32. Return to Normal Mode after Missing Neutral Detection
Missing Neutral Gain Calibration
When the ADE7761 is in missing neutral mode, the energy is
billed based on the active current input signal level. The
calibration of the frequency outputs in this mode can be done
with the MISCAL analog input pin. In this mode, applying a dc
voltage of 330 mV on MISCAL is equivalent to applying, in
normal mode, a pure sine wave on the voltage input with a peak
value of 330 mV. The MISCAL input can vary from 0 V to
660 mV (see the Analog Inputs section). When set to 0 V, the
frequency outputs are close to zero. When set to 660 mV dc, the
frequency outputs are twice that when MISCAL is at 330 mV
dc. In other words, Equation 7 can be used in missing neutral
mode by replacing V2
rms
by MISCAL
rms
√2:
2
4
1
2
1
2
/
70
.
,
REF
rms
V
F
MISCAL
Frequency
F
F
×
×
=
(8)
where:
F
1
,
F
2
Frequency
is the output frequency on F1 and F2 (Hz).
V1
rms
is the differential rms voltage signal on Channel 1 (V).
MISCAL
rms
is the differential rms voltage signal on the MISCAL
pin (V).
V
REF
is the reference voltage (2.5 V ± 8%) (V).
F
1-4
is one of four possible frequencies selected by using the
logic inputs S0 and S1 (see Table 5).
Example
In normal mode, ac voltages of ±330 mV peak are applied to V1
and V2, and then the expected output frequency on F1 and F2 is
calculated as follows:
F
1–4
= 1.7 Hz,
SCF
=
S1
=
S0
= 0
V1
= rms of 330 mV peak ac = 0.33/√2 V
V2
= rms of 330 mV peak ac = 0.33/√2 V
V
REF
= 2.5 V (nominal reference value)
Hz
4
=
64
Hz
084
.
5
×
2
2
Hz
7
2
33
×
.
×
33
×
.
×
70
.
,
2
1
=
=
×
=
frequency
F
F
Frequency
CF
Frequency
F
F
2
1
In missing neutral mode, ac voltage of ±330 mV peak is applied
to V1, no signal is connected on V2, and 330 mV dc input is
applied to MISCAL. With the ADE7761 in the same configura-
tion as the previous example, the expected output frequencies
on CF, F1, and F2 are
Hz
4
64
,
Hz
084
.
5
×
2
Hz
7
×
2
/
33
×
.
33
.
70
.
,
2
1
2
=
=
=
×
×
=
frequency
F
F
Frequency
CF
Frequency
F
F
2
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADE7761B 制造商:AD 制造商全稱: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:
ADE7761BARS-REF 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection
ADE7761BARS-RL 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection
ADE7761BARSZ 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測(cè)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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