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MAX71020
Single-Chip Electricity Meter AFE
Table 11. CESTATUS Register
CE ADDRESS
0x80
NAME
CESTATUS
DESCRIPTION
See the description of CESTATUS bits in Table 7
Table 12. Sag Threshold and Gain Adjust Control
CE
ADDRESS
NAME
DEFAULT
DESCRIPTION
The voltage threshold for sag warnings. The default value is equivalent to
V RMS × 2
V MAX × 7.8798 × 10 ? 9
0x24
0x40
0x41
0x42
SAG_THR
GAIN_ADJ0
GAIN_ADJ1
GAIN_ADJ2
2.39 x 10 7
16384
16384
16384
113Vpk or 80V RMS if V MAX = 600V RMS .
üüü =
This register scales the voltage measurement channels VA and VB. The default
value of 16384 is equivalent to unity gain (1.000).
This register scales the IA current channel for Phase A. The default value of
16384 is equivalent to unity gain (1.000).
This register scales the IB current channel for Phase B. The default value of
16384 is equivalent to unity gain (1.000).
Table 13. CE Transfer Variable s
CE
ADDRESS
0x84
0x85
0x86
0x88
0x89
0x8A
NAME
WSUM_X
W0SUM_X
W1SUM_X
VARSUM_X
VAR0SUM_X
VAR1SUM_X
DESCRIPTION
The signed sum: W0SUM_X + W1SUM_X. Not used for EQU[2:0] = 0 (register
0x30D[14:12]) and EQU[2:0] = 1.
The sum of Wh samples from each wattmeter element.
LSB W = 6.08040 x 10 -13 x V MAX x I MAX Wh
The signed sum: VAR0SUM_X + VAR1SUM_X. Not used for EQU[2:0] = 0 and
EQU[2:0] = 1.
The sum of VARh samples from each wattmeter element.
LSB W = 6.08040 x 10 -13 x V MAX x I MAX VARh
a transition on the YPULSE output. The CE controls
the pulse rate based on WSUM_X (register 0x084) and
VARSUM_X (register 0x088).
CE Transfer Variables
When the host controller receives the INTZ interrupt, it
knows that fresh data is available in the transfer vari-
ables. They remain constant throughout each accumula-
tion interval. In this data sheet, the names of CE transfer
variables always end with “_X”. The transfer variables
can be categorized as:
Maxim Integrated
U Fundamental energy measurement variables
U Instantaneous (RMS) values
U Other measurement parameters
Fundamental Energy Measurement Variables
Table 13 describes each transfer variable for fundamen-
tal energy measurement. All variables are signed 32-bit
integers. Accumulated variables such as WSUM are
internally scaled so that internal values are no more than
50% of the full-scale range when the integration time is
29
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相关代理商/技术参数
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
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
MAX710ESE+ 制造商:Maxim Integrated Products 功能描述:CONVERTOR DC/DC ((NW))
MAX710ESE+T 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
MAX710ESE-T 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