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参数资料
| 型号： | ADE7878ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 35/100页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 3PH 40LFCSP |
| 标准包装： | 1 |
| 输入阻抗： | 400 千欧 |
| 测量误差： | 0.2% |
| 电压 - 高输入/输出： | 2.4V |
| 电压 - 低输入/输出： | 0.4V |
| 电源电压： | 2.4 V ~ 3.7 V |
| 测量仪表类型： | 3 相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-WQ（6x6） |
| 包装： | 托盘 |
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Data Sheet
ADE7854/ADE7858/ADE7868/ADE7878
detection when the voltage or the current signal stays at a fixed
dc level for more than 62.5 μs × ZXTOUT μs.
A, B, C PHASE
PHASE A
PHASE C
PHASE B
VOLTAGES AFTER
16-BIT INTERNAL
REGISTER VALUE
ZXTOUT
LPF1
VOLTAGE
BIT 19 (SEQERR) IN
STATUS1 REGISTER
ZX A
ZX C
ZX B
OR
CURRENT
SIGNAL
0V
IRQ1
STATUS1[19] SET TO 1
STATUS1[19] CANCELLED
BY A WRITE TO THE
STATUS1 REGISTER WITH
ZXZOxy FLAG IN
STATUS1[31:0], x = V, A
y = A, B, C
IRQ1 INTERRUPT PIN
Figure 44. Zero-Crossing Timeout Detection
Phase Sequence Detection
The ADE7854 / ADE7858 / ADE7868 / ADE7878 have on-chip
phase sequence error detection circuits. This detection works
on phase voltages and considers only the zero crossings
determined by their negative-to-positive transitions. The regular
succession of these zero-crossing events is Phase A followed by
Phase B followed by Phase C (see Figure 46). If the sequence of
zero-crossing events is, instead, Phase A followed by Phase C
followed by Phase B, then Bit 19 (SEQERR) in the STATUS1
register is set.
If Bit 19 (SEQERR) in the MASK1 register is set to 1 and a
phase sequence error event is triggered, the IRQ1 interrupt pin
is driven low. The status bit is cleared and the IRQ1 pin is set
high by writing to the STATUS1 register with the Status Bit 19
(SEQERR) set to 1.
The phase sequence error detection circuit is functional only
when the ADE78xx is connected in a 3-phase, 4-wire, three voltage
sensors configuration (Bits[5:4], CONSEL[1:0] in the ACCMODE
register, set to 00). In all other configurations, only two voltage
sensors are used; therefore, it is not recommended to use the
SEQERR BIT SET
Figure 45. SEQERR Bit Set to 1 When Phase A Voltage Is Followed by
Phase C Voltage
Once a phase sequence error has been detected, the time
measurement between various phase voltages (see the Time
phase voltage should be considered with another phase current
in the computational datapath. Bits[9:8] (VTOIA[1:0]), Bits[11:10]
(VTOIB[1:0]), and Bits[13:12] (VTOIC[1:0]) in the CONFIG
register can be used to direct one phase voltage to the datapath
section for details.
Time Interval Between Phases
The ADE7854 / ADE7858 / ADE7868 / ADE7878 have the capa-
bility to measure the time delay between phase voltages, between
phase currents, or between voltages and currents of the same
phase. The negative-to-positive transitions identified by the zero-
crossing detection circuit are used as start and stop measuring
points. Only one set of such measurements is available at one time,
based on Bits[10:9] (ANGLESEL[1:0]) in the COMPMODE
register.
PHASE A PHASE B PHASE C
detection circuit. In these cases, use the time intervals between
ZX A
ZX B
ZX C
phase voltages to analyze the phase sequence (see the Time
followed by Phase B voltage but by Phase C voltage. Every time
a negative-to-positive zero crossing occurs, Bit 19 (SEQERR) in
the STATUS1 register is set to 1 because such zero crossings on
Phase C, Phase B, or Phase A cannot come after zero crossings
from Phase A, Phase C, or respectively, Phase B zero crossings.
Figure 46. Regular Succession of Phase A, Phase B, and Phase C
When the ANGLESEL[1:0] bits are set to 00, the default value,
the delays between voltages and currents on the same phase are
measured. The delay between Phase A voltage and Phase A
current is stored in the 16-bit unsigned ANGLE0 register (see
and currents on Phase B and Phase C are stored in the ANGLE1
and ANGLE2 registers, respectively.
Rev. H | Page 35 of 100
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7878ACPZ | 制造商:Analog Devices 功能描述:IC MULTIFUNCTION ENERGY METERING LFCSP40 |
| ADE7878ACPZ-RL | 功能描述:IC ENERGY METERING 3PH 40LFCSP 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:* |
| ADE7878XCPZ | 制造商:Analog Devices 功能描述:POLY PHASE MULTIFUNCTION ENERGY METERING IC WITH TOTAL - Bulk |
| ADE7880 | 制造商:Analog Devices 功能描述:BOARD EVAL ENERGY METER ADE |
| ADE7880ACPZ | 功能描述:IC ENERGY METERING 3PH 40LFCSP 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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