MAX71020A - Single Converter AFE


  • Best-in-Class Embedded Algorithms Support Highly Accurate Electricity Measurements
    • Voltage, Current, and Frequency
    • Active, Reactive, and Apparent Power/Energy
    • Digital Temperature Compensation
    • 40Hz–70Hz Line Frequency Range and Phase Compensation (±10°)
  • Advanced AFE with Exceptional Accuracy and Temperature Stability
    • Voltage Reference Temperature Coefficient: 40ppm/°C (max)
    • On-Chip Digital Temperature Sensor
    • 24-Bit 2nd Order Delta-Sigma ADCs with Differential and Single-Ended Inputs
    • ±0.1% Wh Accuracy over 2000:1 Current Range
  • Highly Integrated Features Support Compact Design Cycles and Reduced Bill of Materials
    • Small, 28-Pin TQFN Package
    • Digital Temperature Compensation
    • Low Power Consumption
    • Less Than 5mA (typ) Consumption at 3.3V
    • Simple Host Interface
    • SPI Slave
    • Atomic Measurements Outputs
    • DIO or SPI-Based Status Signals


The MAX71020A is a single-chip analog front-end (AFE) for use in embedded energy measurement applications. 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). It interfaces to a host controller of choice over a SPI interface.

The MAX71020A comes in a 28-pin TQFN package.


  • Building Automation Systems
  • Grid-Friendly Appliances and Smart Plugs
  • Power Distribution Units