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| 型号： | EVAL-ADE5169EBZ-2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 56/156页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5169 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 是 |
| 已用 IC / 零件： | ADE5169 |
| 主要属性： | 用于汇编语言和 C 代码的 IAR 工具 |
| 次要属性： | 隔离和非隔离输出选项 |
| 已供物品： | 板，软件 |
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ADE5166/ADE5169/ADE5566/ADE5569
Peak Detection
The ADE5166/ADE5169/ADE5566/ADE5569 can be program-
med to detect when the absolute value of the voltage or current
channel exceeds a specified peak value. Figure 58 illustrates the
behavior of the peak detection for the voltage channel. Both
voltage and current channels are monitored at the same time.
V 2
VPKLVL[15:0]
PKV RESET
LOW WHEN
MIRQSTH SFR
IS READ
PKV INTERRUPT
FLAG
RESET BIT PKV
IN MIRQSTH SFR
Figure 58. Peak Level Detection
Figure 58 shows a line voltage exceeding a threshold that is set in
the voltage peak register (VPKLVL, Address 0x16[15:0]). The
voltage peak event is recorded by setting the PKV flag (Bit 3)
in the Interrupt Status 3 SFR (MIRQSTH, Address 0xDE). If
the PKV enable bit (Bit 3) is set in the Interrupt Enable 3 SFR
(MIRQENH, Address 0xDB), the 8052 core has a pending ADE
interrupt. Similarly, the current peak event is recorded by setting
the PKI flag (Bit 4) in the Interrupt Status 3 SFR (MIRQSTH,
Address 0xDE). The ADE interrupt stays active until the PKV or
PKI status bit is cleared (see the Energy Measurement Interrupts
section).
Peak Level Set
The contents of the VPKLVL register (Address 0x16) and the
IPKLVL register (Address 0x15) are compared to the absolute value
of the voltage and two MSBs of the current channel, respectively.
Thus, for example, the nominal maximum code from the current
channel ADC with a full-scale signal is 0x28F5C2 (see the Current
Channel ADC section). Therefore, writing 0x28F5 to the IPKLVL
register puts the current channel peak detection level at full scale
and sets the current peak detection to its least sensitive value.
Writing 0x00 puts the current channel detection level at 0. The
Data Sheet
Peak Level Record
Each ADE5166/ADE5169/ADE5566/ADE5569 records the maxi-
mum absolute value reached by the current and voltage channels
in two different registers, IPEAK (Address 0x17) and VPEAK
(Address 0x19), respectively. Each register is a 24-bit, unsigned
register that is updated each time that the absolute value of the
waveform sample from the corresponding channel is above the
value stored in the IPEAK or VPEAK register. The contents of the
IPEAK and VPEAK registers represent the maximum absolute
value observed on the current and voltage channel input,
respectively. Reading the RSTIPEAK (Address 0x18) and
RSTVPEAK (Address 0x1A) registers clears their respective
contents after the read operation.
PHASE COMPENSATION
The ADE5166/ADE5169/ADE5566/ADE5569 must work with
transducers that can have inherent phase errors. For example,
a phase error of 0.1° to 0.3° is not uncommon for a current trans-
former (CT). These phase errors can vary from part to part, and
they must be corrected to perform accurate power calculations.
The errors associated with phase mismatch are particularly notice-
able at low power factors. The ADE5166/ADE5169/ADE5566/
ADE5569 provide a means of digitally calibrating these small phase
errors. The part allows a small time delay or time advance to be
introduced into the signal processing chain to compensate for
small phase errors. Because the compensation is in time, this
technique should be used only for small phase errors in the range
of 0.1° to 0.5°. Correcting large phase errors using a time shift
technique may introduce significant phase errors at higher
harmonics.
The phase calibration register (PHCAL[7:0], Address 0x10) is
a twos complement, signed, single-byte register that has values
ranging from 0x82 (?126d) to 0x68 (+104d).
The PHCAL register is centered at 0x40, meaning that writing
0x40 to the register gives 0 delay. By changing this register, the
time delay in the voltage channel signal path can change from
?231.93 μs to +48.83 μs (MCLK = 4.096 MHz). One LSB is equiv-
alent to a 1.22 μs (4.096 MHz/5) time delay or advance. A line
frequency of 60 Hz gives a phase resolution of 0.026° at the
fundamental (that is, 360° × 1.22 μs × 60 Hz).
detection is done by comparing the contents of the IPKLVL reg-
ister to the incoming current channel sample. The PKI flag (Bit 4)
in the Interrupt Status 3 SFR (MIRQSTH, Address 0xDE) indicates
that the peak level is exceeded. If the PKI bit (Bit 4) or the PKV
bit (Bit 3) is set in the Interrupt Enable 3 SFR (MIRQENH,
Address 0xDB), the 8052 core has a pending ADE interrupt.
Rev. D | Page 56 of 156
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相关代理商/技术参数 |
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| EVAL-ADE5169F62EBZ | 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR ADE5169 - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述: |
| EVAL-ADE5569F62EBZ | 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 |
| EVAL-ADE7169EBZ-2 | 功能描述:BOARD EVALUATION FOR ADE7169F16 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| EVAL-ADE7169F16EB | 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 |
| EVAL-ADE7169F16EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For ADE7169 制造商:Analog Devices 功能描述:EVAL BD FOR ADE7169 - Bulk |
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