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参数资料
| 型号： | MAX71020AEUI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 31/35页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 1PH 28TSSOP |
| 标准包装： | 50 |
| 输入阻抗： | 50 千欧 ~ 100 千欧 |
| 测量误差： | 0.5% |
| 电压 - 高输入/输出： | 2V |
| 电压 - 低输入/输出： | 0.8V |
| 电流 - 电源： | 4.3mA |
| 电源电压： | 2.8 V ~ 3.6 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： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
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MAX71020
Single-Chip Electricity Meter AFE
WRATE × WSUM × f S × X
2 46
The meter constant Kh is derived from WRATE and rep-
resents the amount of energy measured for each pulse. If
Kh = 1Wh/pulse and 120V and 30A is applied in-phase to
the meter, the meter will produce one pulse per second
(120V and 30A results in a load of 3600W, or put another
way, energy consumption of one watt-hour per second).
If the load is 240V at 150A, 10 pulses per second are
generated. To compute the WRATE value, see Table 16 .
The maximum pulse rate is 7.56kHz.
See the VPULSE and WPULSE section for details on how
to adjust the timing of the output pulses. The maximum
time jitter is 1/6 of the multiplexer cycle period (nomi-
nally 67μs) and is independent of the number of pulses
measured. Thus, if the pulse generator is monitored for
one second, the peak jitter is 67ppm. After 10s, the peak
jitter is 6.7ppm. The average jitter is always zero. If it
is attempted to drive either pulse generator faster than
its maximum rate, it simply outputs at its maximum rate
without exhibiting any rollover characteristics. The actual
pulse rate, using WSUM as an example, is:
Table 16. CE Pulse Generation Parameters
RATE = Hz
where f S = sampling frequency (2520.6Hz), X =
pulse speed factor derived from the CE variables
PULSE_SLOW (register 0x020[0]) and PULSE_FAST
(register 0x020[1]).
Other CE Parameters
Table 17 shows the CE parameters used for suppression
of noise due to scaling and truncation effects.
CE Calibration Parameters
Table 18 lists the parameters that are typically entered to
effect calibration of meter accuracy.
CE Flow Diagrams
Figure 10 to Figure 12 show the data flow through the
CE in simplified form. Functions not shown include delay
compensation, sag detection, scaling, and the process-
ing of meter equations.
CE
ADDRESS
0x21
NAME
WRATE
DEFAULT
547
where:
Kh =
DESCRIPTION
K × V MAX × I MAX
üüüüüüü × ×
Wh pulse
K = 42.7868
The default value yields 1.0 Wh/pulse for V MAX = 600V and I MAX = 208A. The
maximum value for WRATE is 32,768 (2 15 ).
0x22
0x45
0x46
0x47
0x49
0x4A
0x4B
Maxim Integrated
KVAR
WPULSE_CTR
WPULSE_FRAC
WSUM_ACCUM
VPULSE_CTR
VPULSE_FRAC
VSUM_ACCUM
6444
0
0
0
0
0
0
Scale factor for VAR measurement
WPULSE counter
Unsigned numerator, containing a fraction of a pulse. The value in this register
always counts up towards the next pulse.
Rollover accumulator for WPULSE
VPULSE counter
Unsigned numerator, containing a fraction of a pulse. The value in this register
always counts up towards the next pulse.
Rollover accumulator for VPULSE
31
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX71020AEUI+ | 功能描述:电信线路管理 IC Single-Chip AFE Electricity Meter RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| MAX71020AEUI+R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Chip Electricity Meter AFE |
| MAX710C/D | 功能描述:直流/直流开关转换器 3.3V/5V or Adjustable Step-Up Step-Down DC-DC Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX710C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX710ESE | 功能描述:直流/直流开关转换器 3.3/5V or Adjustable Step-Up Step-Down RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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