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參數(shù)資料
| 型號： | ADE7761AARS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(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： | M0-150AE, SSOP-20 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大小： | 367K |
| 代理商： | ADE7761AARS |
ADE7761A
OPERATION
POWER SUPPLY MONITOR
The ADE7761A continuously monitors the power supply (V
DD
)
with its on-chip, power supply monitor. If the supply is less than
4 V ± 5%, the ADE7761A goes into an inactive state, that is, no
energy is accumulated and the CF, F1, and F2 outputs are
disabled. This is useful to ensure correct device operation at
power-up and during power-down. The power supply monitor
has built-in hysteresis and filtering, which provides a high
degree of immunity to false triggering due to noisy supplies.
Rev. 0 | Page 11 of 24
The power supply and decoupling for the part should be such
that the ripple at V
DD
does not exceed 5 V ± 5% as specified for
normal operation.
REVP - FAULT - CF -
F1 - F2 OUTPUTS
INACTIVE
ACTIVE
TIME
INACTIVE
V
DD
5V
4V
0V
0
Figure 11. On-Chip, Power Supply Monitoring
ANALOG INPUTS
Channel V1 (Current Channel)
The voltage outputs from the current transducers are connected
to the ADE7761A at Channel V1. It has two voltage inputs, V
1A
and V
1B
. These inputs are fully differential with respect to V
1N
.
However, at any one time, only one is selected to perform the
power calculation (see the Fault Detection section).
The maximum peak differential signal on V
1A
V
1N
and V
1B
V
1N
is ±660 mV. However, Channel 1 has a programmable gain
amplifier (PGA) with user-selectable gains of 1 or 16 (see
Table 5). This gain facilitates easy transducer interfacing.
Table 5. Channel 1 Dynamic Range
PGA
Gain
0
1
1
16
Maximum Differential Signal (mV)
660
41
Figure 12 shows the maximum signal levels on V
1A
, V
1B
, and
V
1N
. The maximum differential voltage is ±660 mV divided by
the gain selection. The differential voltage signal on the inputs
must be referenced to a common mode (usually AGND).
V
CM
DIFFERENTIAL INPUT B
±660mV MAX PEAK
V
1B
V
1N
V
1A
V1
V1
V
CM
COMMON MODE
±100mV MAX
DIFFERENTIAL INPUT A
±660mV MAX PEAK
AGND
V
1A
, V
1B
0
+660mV
GAIN
–660mV
GAIN
+ V
CM
+ V
CM
Figure 12. Maximum Signal Levels, Channel 1
Channel V2 (Voltage Channel)
The output of the line voltage transducer is connected to the
ADE7761A at this analog input. Channel V2 is a single-ended,
voltage input. The maximum peak differential signal on Channel 2
is ±660 mV with respect to V
2N
. Figure 13 shows the maximum
signal levels that can be connected to Channel 2.
0
V
CM
+660mV + V
CM
–660mV + V
CM
COMMON MODE
±100mV MAX
V
2N
V
2P
V
CM
V2
DIFFERENTIAL INPUT
±660mV MAX PEAK
V2
Figure 13. Maximum Signal Levels, Channel 2
The differential voltage V
2P
V
2N
must be referenced to a
common mode (usually AGND). The analog inputs of the
ADE7761A can be driven with common-mode voltages of up
to 100 mV with respect to AGND. However, the best results
are achieved using a common mode equal to AGND.
MISCAL Input
The input for the power calibration in missing neutral mode
is connected to the ADE7761A at this analog input. MISCAL is
a single-ended, voltage input. It is recommended to use a dc
signal derived from the voltage reference to drive this pin. The
maximum peak differential signal on MISCAL is 660 mV with
respect to V
2N
. Figure 14 shows the maximum signal levels that
can be connected to the MISCAL pin.
0
V
CM
+660mV + V
CM
COMMON MODE
±100mV MAX
V
2N
MISCAL
V
CM
MISCAL
DIFFERENTIAL INPUT
±660mV MAX PEAK
MISCAL
AGND
Figure 14. Maximum Signal Levels, MISCAL
相關(guān)PDF資料 |
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| ADE7761AARS-REF | Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761AARS-RL | Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADE7761AARS-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 |
| ADE7761AARS-RL | 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R |
| ADE7761AARSZ | 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:* |
| ADE7761AARSZ-RL | 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:* |
| ADE7761ARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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