收藏本站
ADE7758
SAG LEVEL SET
The contents of the single-byte SAG level register, SAGLVL[0:7],
are compared to the absolute value of Bit 6 to Bit 13 from the
voltage waveform samples. For example, the nominal maximum
code of the voltage channel waveform samples with a full-scale
signal input at 60 Hz is 0x2748 (see the Voltage Channel Sampling
section). Bit 13 to Bit 6 are 0x9D. Therefore, writing 0x9D to the
SAG level register puts the SAG detection level at full scale and
sets the SAG detection to its most sensitive value.
The detection is made when the content of the SAGLVL[7:0]
register is greater than the incoming sample. Writing 0x00 puts
the SAG detection level at 0. The detection of a decrease of an
input voltage is disabled in this case.
PEAK VOLTAGE DETECTION
The ADE7758 can record the peak of the voltage waveform and
Data Sheet
Note that if more than one bit is set, the VPEAK and IPEAK
registers can hold values from two different phases, that is, the
voltage and current peak are independently processed (see the
Peak Current Detection section).
Note that the number of half-line cycles is based on counting
the zero crossing of the voltage channel. The ZXSEL[2:0] bits in
the LCYCMODE register determine which voltage channels are
used for the zero-crossing detection (see Table 22). The same
signal is also used for line cycle energy accumulation mode if
activated.
Overvoltage Detection Interrupt
Figure 59 illustrates the behavior of the overvoltage detection.
VOLTAGE PEAK WAVEFORM BEING MONITORED
(SELECTED BY PKIRQSEL[5:7] IN MMODE REGISTER)
VPINTLVL[7:0]
produce an interrupt if the current exceeds a preset limit.
Peak Voltage Detection Using the VPEAK Register
The peak absolute value of the voltage waveform within a fixed
number of half-line cycles is stored in the VPEAK register.
Figure 58 illustrates the timing behavior of the peak voltage
detection.
PKV RESET LOW
WHEN RSTATUS
L2
L1
VOLTAGE WAVEFORM
(PHASE SELECTED BY
PEAKSEL[2:4]
REGISTER IS READ
PKV INTERRUPT FLAG
(BIT 14 OF STATUS
REGISTER)
READ RSTATUS
REGISTER
Figure 59. ADE7758 Overvoltage Detection
IN MMODE REGISTER)
Note that the content of the VPINTLVL[7:0] register is
equivalent to Bit 6 to Bit 13 of the 16-bit voltage waveform
00
L1
L2
L1
NO. OF HALF
LINE CYCLES
SPECIFIED BY
LINECYC[15:0]
REGISTER
CONTENT OF
VPEAK[7:0]
Figure 58. Peak Voltage Detection Using the VPEAK Register
Note that the content of the VPEAK register is equivalent to
Bit 6 to Bit 13 of the 16-bit voltage waveform sample. At full-
scale analog input, the voltage waveform sample at 60 Hz is
0x2748. The VPEAK at full-scale input is, therefore, expected to
be 0x9D.
In addition, multiple phases can be activated for the peak
detection simultaneously by setting multiple bits among the
PEAKSEL[2:4] bits in the MMODE register. These bits select
the phase for both voltage and current peak measurements.
samples; therefore, setting this register to 0x9D represents
putting the peak detection at full-scale analog input. Figure 59
shows a voltage exceeding a threshold. By setting the PKV flag
(Bit 14) in the interrupt status register, the overvoltage event is
recorded. If the PKV enable bit is set to Logic 1 in the interrupt
mask register, the IRQ logic output goes active low (see the
Interrupts section).
Multiple phases can be activated for peak detection. If any of the
active phases produce waveform samples above the threshold,
the PKV flag in the interrupt status register is set. The phase in
which overvoltage is monitored is set by the PKIRQSEL[5:7]
bits in the MMODE register (see Table 19).
PHASE SEQUENCE DETECTION
The ADE7758 has an on-chip phase sequence error detection
interrupt. This detection works on phase voltages and considers
all associated zero crossings. The regular succession of these
zero crossings events is a negative to positive transition on
Phase A, followed by a positive to negative transition on Phase
C, followed by a negative to positive transition on Phase B, and
so on.
Rev. E | Page 26 of 72
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ADE7761AARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7761BARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7768ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADE7769ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADM8843ACPZ-REEL7 IC LED DRVR WHITE BCKLGT 16LFCSP
ADP1653ACPZ-R7 IC LED DRVR PHOTO FLASH 16-LFCSP
ADP1712-EVALZ BOARD EVALUATION ADP1712
ADP1720-EVALZ BOARD EVAL FOR ADP1720-ADJ
相关代理商/技术参数
ADE7759 制造商:AD 制造商全称: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 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:*
ADE7759ARSRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:否 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:*
ADE7759ARSZ 功能描述:IC ENERGY METERING 1PHASE 20SSOP 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:*
ADE7759ARSZRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP 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:*
ADE7760 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault Detection
ADE7760ARS 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Analog Devices 功能描述:ENERGY METER IC W/ ONCHIP FAULT & OSCIL. - Rail/Tube
ADE7760ARSRL 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R 制造商:Analog Devices 功能描述:ENERGY METER IC W/ONCHIP FAULT & OSCIL. - Tape and Reel