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| 型号： | ADE5566ASTZF62-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 52/156页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 64LQFP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1,500 |
| 输入阻抗： | 770 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 2V |
| 电压 - 低输入/输出： | 0.8V |
| 电源电压： | 2.4 V ~ 3.7 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 带卷 (TR) |
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ADE5166/ADE5169/ADE5566/ADE5569
FAULT DETECTION (ADE5166/ADE5169 ONLY)
The ADE5166/ADE5169 incorporate a fault detection scheme
that warns of fault conditions and allows accurate measurement to
continue during a fault event. (This feature is not available in the
ADE5566/ADE5569.) The ADE5166/ADE5169 do this by con-
tinuously monitoring both current inputs (I PA and I PB ). For ease of
understanding, these currents are referred to as phase and neutral
(return) currents. In the ADE5166/ADE5169, a fault condition is
defined when the difference between I PA and I PB is greater than
6.25% of the active channel caused by amplitude or phase. If a
fault condition is detected and the inactive channel is larger than
the active channel, the ADE5166/ ADE5169 automatically switch
current measurement to the inactive channel. During a fault, the
active, reactive, and apparent power and the I rms are generated
using the larger of the two cur-rents. On power-up, I PA is the
current input selected for active, reactive, and apparent power
and I rms calculations.
To prevent a false alarm, averaging is done for the fault detection,
and a fault condition is detected approximately one second after
the event. The fault detection is automatically disabled when the
voltage signal is less than 0.3% of the full-scale input range. This
eliminates false detection of a fault due to noise at light loads.
Because the ADE5166/ADE5169 look for a difference between
the voltage signals on I PA and I PB , it is important that both current
transducers be closely matched.
Channel Selection Indication
The current channel selected for measurement is indicated
by the ICHANNEL bit (Bit 7) in the ACCMODE register
(Address 0x0F). When Bit 7 is cleared, I PA is selected; when Bit 7
is set, I PB is selected. The ADE5166/ADE5169 automatically switch
from one channel to the other and report the channel configuration
in the ACCMODE register.
The current channel selected for measurement can also be forced.
Setting the SEL_I_CH bits (Bits[5:4]) in the CALMODE register
(Address 0x3D) to 01 or 10 selects I PA and I PB , respectively. When
both bits are cleared or set, the current channel used for measure-
ment is selected automatically, based on the fault detection.
Fault Indication
The ADE5166/ADE5169 provide an indication of the part going
Data Sheet
Fault with Active Input Greater Than Inactive Input
If I PA is the active current input (that is, I PA is being used for
billing), and the voltage signal on I PB (inactive input) falls below
93.75% of I PA , and the FAULTSIGN bit (Bit 6) of the ACCMODE
register (Address 0x0F) is cleared, the FAULTSIGN flag (Bit 5)
in the Interrupt Status 1 SFR (MIRQSTL, Address 0xDC) is set.
Both analog inputs are filtered and averaged to prevent false
triggering of this logic output. As a consequence of the filtering,
there is a time delay of approximately 3 sec on the logic output
after the fault event. The FAULTSIGN flag is independent of
any activity. Because I PA is the active input and it is still greater
than I PB , billing is maintained on I PA ; that is, no swap to the I PB
input occurs. I PA remains the active input.
Fault with Inactive Input Greater Than Active Input
If the difference between I PB (the inactive input) and I PA (the active
input that is being used for billing) becomes greater than 6.25%
of I PB , and the FAULTSIGN bit (Bit 6) in the ACCMODE register
(Address 0x0F) is cleared, the FAULTSIGN flag (Bit 5) in the Inter-
rupt Status 1 SFR (MIRQSTL, Address 0xDC) is set. The I PB analog
input becomes the active input. Again, a time constant of about
3 sec is associated with this swap. I PA does not swap back to the
active channel until I PA is greater than I PB and the difference
between I PA and I PB , in this order, becomes greater than 6.25% of I PB .
However, if the FAULTSIGN bit (Bit 6) in the ACCMODE register
(Address 0x0F) is set, the FAULTSIGN flag (Bit 5) in the Interrupt
Status 1 SFR (MIRQSTL, Address 0xDC) is set as soon as I PA is
within 6.25% of I PB . This threshold eliminates concerns about
potential chatter between I PA and I PB calibration.
Calibration Concerns
Typically, when a meter is calibrated, the voltage and current cir-
cuits are separated (see Figure 49). Current passes through only
the phase circuit or the neutral circuit. Figure 49 shows current
being passed through the phase circuit. This is the preferred option
because the ADE5166/ADE5169 start billing on the I PA input on
power-up. The phase circuit, CT, is connected to I PA in the diagram.
Because the current sensors are not perfectly matched, it is impor-
tant to match current inputs. The ADE5166/ADE5169 provide a
gain calibration register for I PB , IBGAIN (Address 0x1C). IBGAIN
is a 12-bit, signed, twos complement register that provides a gain
resolution of 0.0244%/LSB.
into or out of a fault condition. The new fault condition is indicated
by the FAULTSIGN flag (Bit 5) in the Interrupt Status 1 SFR
(MIRQSTL, Address 0xDC).
When the FAULTSIGN bit (Bit 6) in the ACCMODE register
(Address 0x0F) is cleared, the FAULTSIGN flag in the Interrupt
Status 1 SFR (MIRQSTL, Address 0xDC) is set when the part is
entering a fault condition or a normal condition.
When the FAULTSIGN bit (Bit 5) is set in the Interrupt Enable 1
SFR (MIRQENL, Address 0xD9) and the FAULTSIGN flag (Bit 5)
TEST
CURRENT
I PB
0
AGND
R A
R F
V
240V rms
CT
CT
R B
R B
C F
R F
V A
0V
R F
R F
C T
V P
V N
I PA
C F
I N
C F
I B
+
–
+
–
+
–
in the Interrupt Status 1 SFR (MIRQSTL, Address 0xDC) is set,
the 8052 core has a pending ADE interrupt.
Figure 49. Fault Conditions for Inactive Input Greater Than Active Input
Rev. D | Page 52 of 156
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE5569 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
| ADE5569ASTZF62 | 功能描述:IC METER/8052/RTC/LCD DRV 64LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:* |
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