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MAX71020
Single-Chip Electricity Meter AFE
General Description
Features
The MAX71020 is a single-chip analog front-end (AFE)
for use in high-performance revenue meters. It contains
the compute engine (CE) found in Maxim Integrated’s
fourth-generation meter system-on-chip (SoC) and an
improved analog-to-digital converter (ADC), and inter-
faces to the host controller of choice over a SPI interface.
The MAX71020 comes in a 28-pin TSSOP package.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX71020.related .
CT
NEUTRAL
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
0.1% Accuracy Over 2000:1 Current Range
Exceeds IEC 62053/ANSI C12.20 Standards
Two Differential Current Sensor Inputs
Two Voltage Sensor Inputs
Selectable Gain of 1 or 8.9 for One Current Input
to Support a Shunt
High-Speed Wh/VARh Pulse Outputs with
Programmable Width
Up to Four Pulse Outputs with Pulse Count
Four-Quadrant Metering
Digital Temperature Compensation
Independent 32-Bit Compute Engine
45Hz to 65Hz Line Frequency Range with Same
Calibration
Phase Compensation (±10°)
Four Multifunction DIO Pins
SPI Interface
-40°C to +85°C Industrial Temperature Range
28-Pin TSSOP Lead(Pb)-Free Package
Typical Operating Circuit
LINE
SHUNT
LOAD
NEUTRAL
LINE
NOTE: THIS SYSTEM IS REFERENCED TO LINE VOLTAGE
POWER SUPPLY
LINE
RESISTOR-
DIVIDER
MUX AND ADC
IAP
IAN
V 3P3A V 3P3SYS
MAX71020
GNDA
GNDD
VA
VB
IBP
IBN
TEMPERATURE SENSOR
REGULATOR
V REF
COMPUTE ENGINE
POWER-FAULT
COMPARATOR
DIO, PULSES
OSCILLATOR/PLL
HOST
SPI
INTERFACE
XIN
9.8304MHz
XOUT
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6400; Rev 1; 1/13
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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